./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix055.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/mix055.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix055.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix055.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:03:18,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:03:18,886 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:03:18,890 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:03:18,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:03:18,913 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:03:18,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:03:18,914 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:03:18,914 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:03:18,917 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:03:18,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:03:18,917 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:03:18,918 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:03:18,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:03:18,919 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:03:18,919 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:03:18,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:03:18,920 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:03:18,920 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:03:18,920 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:03:18,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:03:18,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:03:18,922 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:03:18,922 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:03:18,922 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:03:18,922 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:03:18,922 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:03:18,922 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:03:18,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:03:18,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:03:18,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:03:18,924 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:03:18,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:03:18,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:03:18,924 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:03:18,924 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:03:18,924 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:03:18,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:03:18,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:03:18,925 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:03:18,925 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:03:18,925 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:03:18,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:03:18,925 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:03:19,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:03:19,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:03:19,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:03:19,154 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:03:19,154 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:03:19,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix055.opt.yml/witness.yml [2024-06-21 17:03:19,344 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:03:19,344 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:03:19,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix055.opt.i [2024-06-21 17:03:20,382 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:03:20,602 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:03:20,605 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix055.opt.i [2024-06-21 17:03:20,622 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a90470e8f/42cd2d79d2e148679daada3e680c73cd/FLAG4cafd13fa [2024-06-21 17:03:20,634 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a90470e8f/42cd2d79d2e148679daada3e680c73cd [2024-06-21 17:03:20,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:03:20,635 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:03:20,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:03:20,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:03:20,640 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:03:20,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:03:19" (1/2) ... [2024-06-21 17:03:20,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c026ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:03:20, skipping insertion in model container [2024-06-21 17:03:20,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:03:19" (1/2) ... [2024-06-21 17:03:20,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b7d4486 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:03:20, skipping insertion in model container [2024-06-21 17:03:20,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:03:20" (2/2) ... [2024-06-21 17:03:20,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c026ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:20, skipping insertion in model container [2024-06-21 17:03:20,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:03:20" (2/2) ... [2024-06-21 17:03:20,644 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:03:20,735 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:03:20,736 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-21 17:03:20,736 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-21 17:03:20,737 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-21 17:03:20,737 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-21 17:03:20,737 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:03:20,737 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-21 17:03:20,770 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:03:21,039 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:03:21,050 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:03:21,179 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:03:21,205 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:03:21,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21 WrapperNode [2024-06-21 17:03:21,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:03:21,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:03:21,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:03:21,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:03:21,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,229 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,262 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 156 [2024-06-21 17:03:21,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:03:21,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:03:21,276 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:03:21,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:03:21,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,287 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,302 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:03:21,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,316 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,325 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,326 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:03:21,339 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:03:21,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:03:21,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:03:21,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (1/1) ... [2024-06-21 17:03:21,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:03:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:03:21,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:03:21,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:03:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:03:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:03:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:03:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:03:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:03:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:03:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:03:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:03:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 17:03:21,403 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 17:03:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:03:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:03:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:03:21,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:03:21,405 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:03:21,536 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:03:21,537 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:03:21,871 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:03:21,871 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:03:21,987 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:03:21,990 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:03:21,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:03:21 BoogieIcfgContainer [2024-06-21 17:03:21,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:03:21,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:03:21,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:03:21,995 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:03:21,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:03:19" (1/4) ... [2024-06-21 17:03:21,996 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1170a4d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:03:21, skipping insertion in model container [2024-06-21 17:03:21,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:03:20" (2/4) ... [2024-06-21 17:03:21,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1170a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:03:21, skipping insertion in model container [2024-06-21 17:03:21,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:03:21" (3/4) ... [2024-06-21 17:03:21,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1170a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:03:21, skipping insertion in model container [2024-06-21 17:03:21,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:03:21" (4/4) ... [2024-06-21 17:03:21,998 INFO L112 eAbstractionObserver]: Analyzing ICFG mix055.opt.i [2024-06-21 17:03:22,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:03:22,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 17:03:22,011 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:03:22,055 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:03:22,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 17:03:22,107 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 17:03:22,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:03:22,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:03:22,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 17:03:22,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 17:03:22,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:03:22,121 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;@753a229c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:03:22,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 17:03:22,124 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:03:22,124 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:03:22,124 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:03:22,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:22,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:03:22,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:22,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash 381650207, now seen corresponding path program 1 times [2024-06-21 17:03:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:22,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305723157] [2024-06-21 17:03:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:22,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:23,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:23,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305723157] [2024-06-21 17:03:23,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305723157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:23,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:23,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:03:23,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123617843] [2024-06-21 17:03:23,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:03:23,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:03:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:03:23,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-21 17:03:23,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:23,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:23,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-21 17:03:23,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:24,048 INFO L124 PetriNetUnfolderBase]: 6405/9062 cut-off events. [2024-06-21 17:03:24,049 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-06-21 17:03:24,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18142 conditions, 9062 events. 6405/9062 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50644 event pairs, 4800 based on Foata normal form. 1/8896 useless extension candidates. Maximal degree in co-relation 18129. Up to 8771 conditions per place. [2024-06-21 17:03:24,094 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 41 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 17:03:24,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 223 flow [2024-06-21 17:03:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:03:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:03:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-21 17:03:24,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2024-06-21 17:03:24,105 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 95 transitions. [2024-06-21 17:03:24,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 223 flow [2024-06-21 17:03:24,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:03:24,109 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 17:03:24,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 17:03:24,112 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 17:03:24,113 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 17:03:24,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:24,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:24,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:24,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:03:24,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:24,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:24,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1693662526, now seen corresponding path program 1 times [2024-06-21 17:03:24,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:24,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390567347] [2024-06-21 17:03:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:24,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390567347] [2024-06-21 17:03:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390567347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:24,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:24,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:03:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061522451] [2024-06-21 17:03:24,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:24,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:03:24,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:24,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:03:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:03:24,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:03:24,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:24,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:24,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:03:24,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:25,423 INFO L124 PetriNetUnfolderBase]: 7493/10322 cut-off events. [2024-06-21 17:03:25,424 INFO L125 PetriNetUnfolderBase]: For 2084/2084 co-relation queries the response was YES. [2024-06-21 17:03:25,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23740 conditions, 10322 events. 7493/10322 cut-off events. For 2084/2084 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55776 event pairs, 5002 based on Foata normal form. 4/10307 useless extension candidates. Maximal degree in co-relation 23728. Up to 10194 conditions per place. [2024-06-21 17:03:25,468 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 52 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 17:03:25,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 317 flow [2024-06-21 17:03:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:03:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:03:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-21 17:03:25,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2024-06-21 17:03:25,470 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 121 transitions. [2024-06-21 17:03:25,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 317 flow [2024-06-21 17:03:25,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:03:25,473 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 17:03:25,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 17:03:25,473 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 17:03:25,474 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 17:03:25,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:25,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:25,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:25,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:03:25,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:25,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash 963931870, now seen corresponding path program 1 times [2024-06-21 17:03:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90113712] [2024-06-21 17:03:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:25,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:26,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:26,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90113712] [2024-06-21 17:03:26,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90113712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:26,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:26,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:03:26,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320984294] [2024-06-21 17:03:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:26,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:03:26,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:03:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:03:26,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:03:26,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:26,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:26,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:03:26,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:26,946 INFO L124 PetriNetUnfolderBase]: 7511/10346 cut-off events. [2024-06-21 17:03:26,947 INFO L125 PetriNetUnfolderBase]: For 5962/5962 co-relation queries the response was YES. [2024-06-21 17:03:26,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26675 conditions, 10346 events. 7511/10346 cut-off events. For 5962/5962 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55986 event pairs, 3766 based on Foata normal form. 7/10332 useless extension candidates. Maximal degree in co-relation 26661. Up to 10115 conditions per place. [2024-06-21 17:03:26,989 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 70 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 17:03:26,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 533 flow [2024-06-21 17:03:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:03:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:03:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-21 17:03:26,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-21 17:03:26,991 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 159 transitions. [2024-06-21 17:03:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 533 flow [2024-06-21 17:03:26,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 514 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:03:26,995 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-21 17:03:26,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-21 17:03:26,995 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 17:03:26,996 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-21 17:03:26,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:26,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:26,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:26,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:03:26,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:26,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1376156069, now seen corresponding path program 1 times [2024-06-21 17:03:26,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:26,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950505881] [2024-06-21 17:03:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:26,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:27,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:27,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950505881] [2024-06-21 17:03:27,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950505881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:27,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:27,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:03:27,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853636175] [2024-06-21 17:03:27,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:27,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:03:27,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:27,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:03:27,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:03:27,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:03:27,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:27,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:27,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:03:27,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:28,602 INFO L124 PetriNetUnfolderBase]: 7653/10568 cut-off events. [2024-06-21 17:03:28,603 INFO L125 PetriNetUnfolderBase]: For 14677/14696 co-relation queries the response was YES. [2024-06-21 17:03:28,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32155 conditions, 10568 events. 7653/10568 cut-off events. For 14677/14696 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 57340 event pairs, 2959 based on Foata normal form. 48/10595 useless extension candidates. Maximal degree in co-relation 32138. Up to 10107 conditions per place. [2024-06-21 17:03:28,655 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 80 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-21 17:03:28,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 688 flow [2024-06-21 17:03:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:03:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:03:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-21 17:03:28,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 17:03:28,658 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 186 transitions. [2024-06-21 17:03:28,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 688 flow [2024-06-21 17:03:28,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 112 transitions, 676 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 17:03:28,665 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 377 flow [2024-06-21 17:03:28,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 17:03:28,666 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-21 17:03:28,666 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 377 flow [2024-06-21 17:03:28,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:28,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:28,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:28,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:03:28,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:28,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1949603560, now seen corresponding path program 1 times [2024-06-21 17:03:28,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:28,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719663581] [2024-06-21 17:03:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:28,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:29,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:29,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719663581] [2024-06-21 17:03:29,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719663581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:29,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:29,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:03:29,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645577834] [2024-06-21 17:03:29,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:29,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:03:29,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:03:29,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:03:29,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:03:29,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 377 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:29,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:29,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:03:29,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:30,307 INFO L124 PetriNetUnfolderBase]: 6546/9312 cut-off events. [2024-06-21 17:03:30,307 INFO L125 PetriNetUnfolderBase]: For 18288/18316 co-relation queries the response was YES. [2024-06-21 17:03:30,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30405 conditions, 9312 events. 6546/9312 cut-off events. For 18288/18316 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 52358 event pairs, 3025 based on Foata normal form. 3/9299 useless extension candidates. Maximal degree in co-relation 30384. Up to 8977 conditions per place. [2024-06-21 17:03:30,364 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 64 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-21 17:03:30,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 569 flow [2024-06-21 17:03:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:03:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:03:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 17:03:30,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 17:03:30,366 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 377 flow. Second operand 5 states and 125 transitions. [2024-06-21 17:03:30,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 569 flow [2024-06-21 17:03:30,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 508 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 17:03:30,374 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 347 flow [2024-06-21 17:03:30,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-21 17:03:30,374 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-21 17:03:30,375 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 347 flow [2024-06-21 17:03:30,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:30,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:30,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:30,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:03:30,375 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:30,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1799219115, now seen corresponding path program 1 times [2024-06-21 17:03:30,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:30,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412927121] [2024-06-21 17:03:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:30,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:30,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:30,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412927121] [2024-06-21 17:03:30,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412927121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:30,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:30,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:03:30,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462736706] [2024-06-21 17:03:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:30,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:03:30,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:03:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:03:31,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:03:31,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:31,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:31,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:03:31,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:32,303 INFO L124 PetriNetUnfolderBase]: 7657/10574 cut-off events. [2024-06-21 17:03:32,304 INFO L125 PetriNetUnfolderBase]: For 24864/24884 co-relation queries the response was YES. [2024-06-21 17:03:32,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35121 conditions, 10574 events. 7657/10574 cut-off events. For 24864/24884 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 57427 event pairs, 3614 based on Foata normal form. 24/10584 useless extension candidates. Maximal degree in co-relation 35098. Up to 10337 conditions per place. [2024-06-21 17:03:32,353 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 67 selfloop transitions, 25 changer transitions 0/99 dead transitions. [2024-06-21 17:03:32,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 668 flow [2024-06-21 17:03:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:03:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:03:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 17:03:32,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032679738562091 [2024-06-21 17:03:32,355 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 347 flow. Second operand 6 states and 154 transitions. [2024-06-21 17:03:32,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 668 flow [2024-06-21 17:03:32,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 639 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:03:32,361 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 414 flow [2024-06-21 17:03:32,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=414, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-21 17:03:32,362 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 17:03:32,362 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 414 flow [2024-06-21 17:03:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:32,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:32,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:32,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:03:32,363 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:32,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash -963230025, now seen corresponding path program 2 times [2024-06-21 17:03:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:32,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100699984] [2024-06-21 17:03:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:32,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100699984] [2024-06-21 17:03:32,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100699984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:32,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:32,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:03:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576871213] [2024-06-21 17:03:32,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:03:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:03:32,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:03:33,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:03:33,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:33,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:33,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:03:33,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:33,996 INFO L124 PetriNetUnfolderBase]: 7612/10501 cut-off events. [2024-06-21 17:03:33,997 INFO L125 PetriNetUnfolderBase]: For 29616/29644 co-relation queries the response was YES. [2024-06-21 17:03:34,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35847 conditions, 10501 events. 7612/10501 cut-off events. For 29616/29644 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 56667 event pairs, 3628 based on Foata normal form. 24/10505 useless extension candidates. Maximal degree in co-relation 35824. Up to 10268 conditions per place. [2024-06-21 17:03:34,062 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 60 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-21 17:03:34,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 648 flow [2024-06-21 17:03:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:03:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:03:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 17:03:34,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2024-06-21 17:03:34,064 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 414 flow. Second operand 6 states and 149 transitions. [2024-06-21 17:03:34,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 648 flow [2024-06-21 17:03:34,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 605 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:03:34,079 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 434 flow [2024-06-21 17:03:34,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-06-21 17:03:34,081 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2024-06-21 17:03:34,081 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 434 flow [2024-06-21 17:03:34,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:34,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:34,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:34,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:03:34,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:34,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash 236161693, now seen corresponding path program 1 times [2024-06-21 17:03:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:34,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206450542] [2024-06-21 17:03:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:34,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:34,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206450542] [2024-06-21 17:03:34,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206450542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:34,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:34,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:03:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342175684] [2024-06-21 17:03:34,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:34,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:03:34,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:03:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:03:34,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:03:34,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:34,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:34,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:03:34,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:36,028 INFO L124 PetriNetUnfolderBase]: 8299/11564 cut-off events. [2024-06-21 17:03:36,028 INFO L125 PetriNetUnfolderBase]: For 36466/36466 co-relation queries the response was YES. [2024-06-21 17:03:36,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39574 conditions, 11564 events. 8299/11564 cut-off events. For 36466/36466 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 62715 event pairs, 3868 based on Foata normal form. 6/11566 useless extension candidates. Maximal degree in co-relation 39550. Up to 11267 conditions per place. [2024-06-21 17:03:36,098 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 84 selfloop transitions, 17 changer transitions 0/108 dead transitions. [2024-06-21 17:03:36,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 773 flow [2024-06-21 17:03:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:03:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:03:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 17:03:36,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2024-06-21 17:03:36,100 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 434 flow. Second operand 7 states and 167 transitions. [2024-06-21 17:03:36,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 773 flow [2024-06-21 17:03:36,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 682 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:03:36,126 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 455 flow [2024-06-21 17:03:36,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-21 17:03:36,127 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-21 17:03:36,127 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 455 flow [2024-06-21 17:03:36,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:36,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:36,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:36,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:03:36,128 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:36,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1004982215, now seen corresponding path program 1 times [2024-06-21 17:03:36,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:36,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563948489] [2024-06-21 17:03:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:36,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:36,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:36,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563948489] [2024-06-21 17:03:36,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563948489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:36,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:36,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:03:36,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691432816] [2024-06-21 17:03:36,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:36,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:03:36,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:36,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:03:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:03:36,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:03:36,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:36,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:36,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:03:36,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:37,854 INFO L124 PetriNetUnfolderBase]: 8292/11709 cut-off events. [2024-06-21 17:03:37,855 INFO L125 PetriNetUnfolderBase]: For 44584/44584 co-relation queries the response was YES. [2024-06-21 17:03:37,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42299 conditions, 11709 events. 8292/11709 cut-off events. For 44584/44584 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 64544 event pairs, 3960 based on Foata normal form. 2/11707 useless extension candidates. Maximal degree in co-relation 42273. Up to 11309 conditions per place. [2024-06-21 17:03:37,921 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 10 changer transitions 0/94 dead transitions. [2024-06-21 17:03:37,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 94 transitions, 697 flow [2024-06-21 17:03:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:03:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:03:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-21 17:03:37,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-06-21 17:03:37,924 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 455 flow. Second operand 5 states and 117 transitions. [2024-06-21 17:03:37,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 94 transitions, 697 flow [2024-06-21 17:03:37,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 649 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:03:37,948 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 476 flow [2024-06-21 17:03:37,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-21 17:03:37,949 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-21 17:03:37,949 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 476 flow [2024-06-21 17:03:37,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:37,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:37,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:37,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:03:37,950 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:37,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1139724235, now seen corresponding path program 1 times [2024-06-21 17:03:37,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:37,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285374739] [2024-06-21 17:03:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285374739] [2024-06-21 17:03:38,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285374739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:38,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:38,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:03:38,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486665172] [2024-06-21 17:03:38,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:38,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:03:38,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:38,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:03:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:03:38,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:03:38,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 476 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:38,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:38,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:03:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:39,742 INFO L124 PetriNetUnfolderBase]: 8278/11825 cut-off events. [2024-06-21 17:03:39,742 INFO L125 PetriNetUnfolderBase]: For 55845/55845 co-relation queries the response was YES. [2024-06-21 17:03:39,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45004 conditions, 11825 events. 8278/11825 cut-off events. For 55845/55845 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 66219 event pairs, 3930 based on Foata normal form. 4/11825 useless extension candidates. Maximal degree in co-relation 44977. Up to 11273 conditions per place. [2024-06-21 17:03:39,801 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 82 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-21 17:03:39,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 754 flow [2024-06-21 17:03:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:03:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:03:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 17:03:39,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-21 17:03:39,803 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 476 flow. Second operand 6 states and 138 transitions. [2024-06-21 17:03:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 754 flow [2024-06-21 17:03:39,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 715 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 17:03:39,825 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 520 flow [2024-06-21 17:03:39,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-21 17:03:39,826 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-21 17:03:39,826 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 520 flow [2024-06-21 17:03:39,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:39,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:39,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:39,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:03:39,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:39,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:39,827 INFO L85 PathProgramCache]: Analyzing trace with hash 538666626, now seen corresponding path program 1 times [2024-06-21 17:03:39,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:39,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543830913] [2024-06-21 17:03:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:39,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:40,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:40,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543830913] [2024-06-21 17:03:40,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543830913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:40,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:40,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:03:40,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598954335] [2024-06-21 17:03:40,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:40,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:03:40,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:40,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:03:40,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:03:40,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:03:40,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:40,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:40,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:03:40,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:42,058 INFO L124 PetriNetUnfolderBase]: 9647/13329 cut-off events. [2024-06-21 17:03:42,059 INFO L125 PetriNetUnfolderBase]: For 86379/86471 co-relation queries the response was YES. [2024-06-21 17:03:42,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55105 conditions, 13329 events. 9647/13329 cut-off events. For 86379/86471 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 73386 event pairs, 3819 based on Foata normal form. 54/13372 useless extension candidates. Maximal degree in co-relation 55077. Up to 12454 conditions per place. [2024-06-21 17:03:42,147 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 93 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-21 17:03:42,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 133 transitions, 1002 flow [2024-06-21 17:03:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:03:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:03:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 17:03:42,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 17:03:42,149 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 520 flow. Second operand 7 states and 181 transitions. [2024-06-21 17:03:42,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 133 transitions, 1002 flow [2024-06-21 17:03:42,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 949 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 17:03:42,176 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 600 flow [2024-06-21 17:03:42,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=600, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2024-06-21 17:03:42,176 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2024-06-21 17:03:42,177 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 600 flow [2024-06-21 17:03:42,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:42,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:42,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:42,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:03:42,177 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)] === [2024-06-21 17:03:42,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash 538727076, now seen corresponding path program 2 times [2024-06-21 17:03:42,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084907601] [2024-06-21 17:03:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:42,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:42,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:42,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084907601] [2024-06-21 17:03:42,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084907601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:42,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:42,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:03:42,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180620757] [2024-06-21 17:03:42,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:42,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:03:42,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:03:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:03:43,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:03:43,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 600 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:43,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:43,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:03:43,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:44,691 INFO L124 PetriNetUnfolderBase]: 9760/13508 cut-off events. [2024-06-21 17:03:44,692 INFO L125 PetriNetUnfolderBase]: For 102485/102577 co-relation queries the response was YES. [2024-06-21 17:03:44,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57911 conditions, 13508 events. 9760/13508 cut-off events. For 102485/102577 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 74496 event pairs, 4384 based on Foata normal form. 87/13574 useless extension candidates. Maximal degree in co-relation 57882. Up to 13026 conditions per place. [2024-06-21 17:03:44,793 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 90 selfloop transitions, 31 changer transitions 0/129 dead transitions. [2024-06-21 17:03:44,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 980 flow [2024-06-21 17:03:44,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:03:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:03:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 17:03:44,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-06-21 17:03:44,795 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 600 flow. Second operand 7 states and 177 transitions. [2024-06-21 17:03:44,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 980 flow [2024-06-21 17:03:44,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 931 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:03:44,846 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 668 flow [2024-06-21 17:03:44,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=668, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2024-06-21 17:03:44,847 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-21 17:03:44,847 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 668 flow [2024-06-21 17:03:44,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:44,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:44,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:44,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:03:44,848 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:44,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:44,848 INFO L85 PathProgramCache]: Analyzing trace with hash -983152376, now seen corresponding path program 1 times [2024-06-21 17:03:44,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:44,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203232105] [2024-06-21 17:03:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:44,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:45,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:45,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203232105] [2024-06-21 17:03:45,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203232105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:45,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:45,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:03:45,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692256789] [2024-06-21 17:03:45,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:45,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:03:45,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:03:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:03:45,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:45,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 668 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:45,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:45,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:45,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:46,853 INFO L124 PetriNetUnfolderBase]: 10097/13918 cut-off events. [2024-06-21 17:03:46,854 INFO L125 PetriNetUnfolderBase]: For 115744/115750 co-relation queries the response was YES. [2024-06-21 17:03:46,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61442 conditions, 13918 events. 10097/13918 cut-off events. For 115744/115750 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 74744 event pairs, 4586 based on Foata normal form. 6/13919 useless extension candidates. Maximal degree in co-relation 61411. Up to 13728 conditions per place. [2024-06-21 17:03:46,940 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 98 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-21 17:03:46,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 125 transitions, 1108 flow [2024-06-21 17:03:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:03:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:03:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 17:03:46,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2024-06-21 17:03:46,942 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 668 flow. Second operand 6 states and 142 transitions. [2024-06-21 17:03:46,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 125 transitions, 1108 flow [2024-06-21 17:03:47,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 1027 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:03:47,012 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 734 flow [2024-06-21 17:03:47,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=734, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-21 17:03:47,013 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-06-21 17:03:47,013 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 734 flow [2024-06-21 17:03:47,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:47,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:47,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:47,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:03:47,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:47,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash 822638588, now seen corresponding path program 1 times [2024-06-21 17:03:47,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:47,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207193634] [2024-06-21 17:03:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:47,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:47,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:47,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207193634] [2024-06-21 17:03:47,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207193634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:47,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:47,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:03:47,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427251671] [2024-06-21 17:03:47,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:47,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:03:47,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:03:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:03:47,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:47,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 734 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:47,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:47,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:47,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:49,379 INFO L124 PetriNetUnfolderBase]: 10155/13971 cut-off events. [2024-06-21 17:03:49,379 INFO L125 PetriNetUnfolderBase]: For 136154/136163 co-relation queries the response was YES. [2024-06-21 17:03:49,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64457 conditions, 13971 events. 10155/13971 cut-off events. For 136154/136163 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 74887 event pairs, 4326 based on Foata normal form. 8/13963 useless extension candidates. Maximal degree in co-relation 64425. Up to 13591 conditions per place. [2024-06-21 17:03:49,487 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 105 selfloop transitions, 37 changer transitions 0/148 dead transitions. [2024-06-21 17:03:49,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 148 transitions, 1204 flow [2024-06-21 17:03:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:03:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:03:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 17:03:49,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681372549019608 [2024-06-21 17:03:49,493 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 734 flow. Second operand 8 states and 191 transitions. [2024-06-21 17:03:49,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 148 transitions, 1204 flow [2024-06-21 17:03:49,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 148 transitions, 1158 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 17:03:49,581 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 865 flow [2024-06-21 17:03:49,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=865, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-21 17:03:49,582 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 39 predicate places. [2024-06-21 17:03:49,582 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 865 flow [2024-06-21 17:03:49,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:49,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:49,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:49,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:03:49,583 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:49,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash -682126306, now seen corresponding path program 2 times [2024-06-21 17:03:49,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:49,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437205585] [2024-06-21 17:03:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437205585] [2024-06-21 17:03:50,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437205585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:50,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:50,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:03:50,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092548517] [2024-06-21 17:03:50,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:50,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:03:50,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:03:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:03:50,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:50,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 865 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:50,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:50,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:50,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:52,092 INFO L124 PetriNetUnfolderBase]: 10140/13954 cut-off events. [2024-06-21 17:03:52,093 INFO L125 PetriNetUnfolderBase]: For 154596/154605 co-relation queries the response was YES. [2024-06-21 17:03:52,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67060 conditions, 13954 events. 10140/13954 cut-off events. For 154596/154605 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 74666 event pairs, 4323 based on Foata normal form. 8/13948 useless extension candidates. Maximal degree in co-relation 67025. Up to 13570 conditions per place. [2024-06-21 17:03:52,208 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 107 selfloop transitions, 45 changer transitions 0/158 dead transitions. [2024-06-21 17:03:52,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 158 transitions, 1401 flow [2024-06-21 17:03:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:03:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:03:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 17:03:52,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681372549019608 [2024-06-21 17:03:52,210 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 865 flow. Second operand 8 states and 191 transitions. [2024-06-21 17:03:52,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 158 transitions, 1401 flow [2024-06-21 17:03:52,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 158 transitions, 1281 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:03:52,308 INFO L231 Difference]: Finished difference. Result has 97 places, 118 transitions, 994 flow [2024-06-21 17:03:52,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=994, PETRI_PLACES=97, PETRI_TRANSITIONS=118} [2024-06-21 17:03:52,308 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-21 17:03:52,309 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 118 transitions, 994 flow [2024-06-21 17:03:52,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:52,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:52,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:03:52,309 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:52,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash -681829636, now seen corresponding path program 3 times [2024-06-21 17:03:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:52,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922544819] [2024-06-21 17:03:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:52,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:53,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:53,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922544819] [2024-06-21 17:03:53,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922544819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:53,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:53,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:03:53,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222090516] [2024-06-21 17:03:53,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:53,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:03:53,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:03:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:03:53,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:53,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 118 transitions, 994 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:53,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:53,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:53,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:54,676 INFO L124 PetriNetUnfolderBase]: 10217/14089 cut-off events. [2024-06-21 17:03:54,676 INFO L125 PetriNetUnfolderBase]: For 173968/173977 co-relation queries the response was YES. [2024-06-21 17:03:54,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69719 conditions, 14089 events. 10217/14089 cut-off events. For 173968/173977 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 75914 event pairs, 3889 based on Foata normal form. 8/14083 useless extension candidates. Maximal degree in co-relation 69682. Up to 13409 conditions per place. [2024-06-21 17:03:54,773 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 105 selfloop transitions, 56 changer transitions 0/167 dead transitions. [2024-06-21 17:03:54,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 1500 flow [2024-06-21 17:03:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:03:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:03:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 17:03:54,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47794117647058826 [2024-06-21 17:03:54,777 INFO L175 Difference]: Start difference. First operand has 97 places, 118 transitions, 994 flow. Second operand 8 states and 195 transitions. [2024-06-21 17:03:54,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 1500 flow [2024-06-21 17:03:54,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 1404 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 17:03:54,880 INFO L231 Difference]: Finished difference. Result has 103 places, 123 transitions, 1113 flow [2024-06-21 17:03:54,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1113, PETRI_PLACES=103, PETRI_TRANSITIONS=123} [2024-06-21 17:03:54,881 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-21 17:03:54,883 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 123 transitions, 1113 flow [2024-06-21 17:03:54,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:54,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:54,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:54,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:03:54,884 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:54,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash -971724536, now seen corresponding path program 2 times [2024-06-21 17:03:54,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:54,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962866028] [2024-06-21 17:03:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:54,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:55,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:55,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962866028] [2024-06-21 17:03:55,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962866028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:55,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:55,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:03:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363208138] [2024-06-21 17:03:55,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:55,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:03:55,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:03:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:03:55,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:55,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 123 transitions, 1113 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:55,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:55,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:55,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:57,012 INFO L124 PetriNetUnfolderBase]: 10210/14107 cut-off events. [2024-06-21 17:03:57,013 INFO L125 PetriNetUnfolderBase]: For 195670/195685 co-relation queries the response was YES. [2024-06-21 17:03:57,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71744 conditions, 14107 events. 10210/14107 cut-off events. For 195670/195685 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 76096 event pairs, 4330 based on Foata normal form. 12/14112 useless extension candidates. Maximal degree in co-relation 71705. Up to 13901 conditions per place. [2024-06-21 17:03:57,121 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 114 selfloop transitions, 21 changer transitions 0/141 dead transitions. [2024-06-21 17:03:57,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1429 flow [2024-06-21 17:03:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:03:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:03:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 17:03:57,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-06-21 17:03:57,123 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 1113 flow. Second operand 6 states and 134 transitions. [2024-06-21 17:03:57,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1429 flow [2024-06-21 17:03:57,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1272 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 17:03:57,292 INFO L231 Difference]: Finished difference. Result has 104 places, 123 transitions, 1007 flow [2024-06-21 17:03:57,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1007, PETRI_PLACES=104, PETRI_TRANSITIONS=123} [2024-06-21 17:03:57,293 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-21 17:03:57,293 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 123 transitions, 1007 flow [2024-06-21 17:03:57,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:57,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:57,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:57,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:03:57,294 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:57,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash -977432504, now seen corresponding path program 1 times [2024-06-21 17:03:57,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:57,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21588177] [2024-06-21 17:03:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:57,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:57,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21588177] [2024-06-21 17:03:57,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21588177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:57,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:57,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:03:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160569675] [2024-06-21 17:03:57,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:57,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:03:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:03:57,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:03:57,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:03:57,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 123 transitions, 1007 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:57,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:57,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:03:57,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:59,176 INFO L124 PetriNetUnfolderBase]: 8831/12505 cut-off events. [2024-06-21 17:03:59,177 INFO L125 PetriNetUnfolderBase]: For 177854/177860 co-relation queries the response was YES. [2024-06-21 17:03:59,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63477 conditions, 12505 events. 8831/12505 cut-off events. For 177854/177860 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 69537 event pairs, 3564 based on Foata normal form. 6/12506 useless extension candidates. Maximal degree in co-relation 63437. Up to 12081 conditions per place. [2024-06-21 17:03:59,260 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 126 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2024-06-21 17:03:59,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 1519 flow [2024-06-21 17:03:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:03:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:03:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 17:03:59,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:03:59,262 INFO L175 Difference]: Start difference. First operand has 104 places, 123 transitions, 1007 flow. Second operand 6 states and 144 transitions. [2024-06-21 17:03:59,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 1519 flow [2024-06-21 17:03:59,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1460 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:03:59,392 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1099 flow [2024-06-21 17:03:59,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1099, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-21 17:03:59,393 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-21 17:03:59,393 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1099 flow [2024-06-21 17:03:59,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:59,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:59,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:59,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:03:59,394 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:59,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 630739306, now seen corresponding path program 2 times [2024-06-21 17:03:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:59,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578632623] [2024-06-21 17:03:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:59,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578632623] [2024-06-21 17:03:59,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578632623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:59,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:59,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:03:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464895748] [2024-06-21 17:03:59,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:59,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:03:59,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:59,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:03:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:04:00,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:04:00,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1099 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:00,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:00,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:04:00,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:01,243 INFO L124 PetriNetUnfolderBase]: 8824/12497 cut-off events. [2024-06-21 17:04:01,244 INFO L125 PetriNetUnfolderBase]: For 199766/199772 co-relation queries the response was YES. [2024-06-21 17:04:01,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66174 conditions, 12497 events. 8824/12497 cut-off events. For 199766/199772 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 69585 event pairs, 3567 based on Foata normal form. 6/12497 useless extension candidates. Maximal degree in co-relation 66133. Up to 12074 conditions per place. [2024-06-21 17:04:01,342 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 121 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-06-21 17:04:01,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1429 flow [2024-06-21 17:04:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:04:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:04:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 17:04:01,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2024-06-21 17:04:01,352 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1099 flow. Second operand 6 states and 139 transitions. [2024-06-21 17:04:01,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1429 flow [2024-06-21 17:04:01,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1351 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-21 17:04:01,516 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1072 flow [2024-06-21 17:04:01,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1072, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-06-21 17:04:01,516 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2024-06-21 17:04:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1072 flow [2024-06-21 17:04:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:01,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:01,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:04:01,517 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:01,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -413249248, now seen corresponding path program 1 times [2024-06-21 17:04:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385158677] [2024-06-21 17:04:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:02,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:02,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385158677] [2024-06-21 17:04:02,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385158677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:02,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:02,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:02,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269729102] [2024-06-21 17:04:02,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:02,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:02,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:02,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:02,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:02,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:02,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1072 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:02,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:02,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:02,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:03,790 INFO L124 PetriNetUnfolderBase]: 10274/14202 cut-off events. [2024-06-21 17:04:03,790 INFO L125 PetriNetUnfolderBase]: For 257821/257833 co-relation queries the response was YES. [2024-06-21 17:04:03,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76840 conditions, 14202 events. 10274/14202 cut-off events. For 257821/257833 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 76981 event pairs, 4265 based on Foata normal form. 12/14206 useless extension candidates. Maximal degree in co-relation 76797. Up to 13757 conditions per place. [2024-06-21 17:04:03,905 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 129 selfloop transitions, 52 changer transitions 0/187 dead transitions. [2024-06-21 17:04:03,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 187 transitions, 1882 flow [2024-06-21 17:04:03,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:04:03,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 17:04:03,907 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1072 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:04:03,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 187 transitions, 1882 flow [2024-06-21 17:04:04,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 187 transitions, 1827 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:04:04,076 INFO L231 Difference]: Finished difference. Result has 113 places, 149 transitions, 1392 flow [2024-06-21 17:04:04,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1392, PETRI_PLACES=113, PETRI_TRANSITIONS=149} [2024-06-21 17:04:04,076 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2024-06-21 17:04:04,077 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 149 transitions, 1392 flow [2024-06-21 17:04:04,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:04,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:04,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:04,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:04:04,077 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:04,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1480390588, now seen corresponding path program 1 times [2024-06-21 17:04:04,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:04,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503575643] [2024-06-21 17:04:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:04,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:04,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:04,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503575643] [2024-06-21 17:04:04,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503575643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:04,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:04,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:04:04,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231212409] [2024-06-21 17:04:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:04,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:04:04,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:04:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:04:05,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:05,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 149 transitions, 1392 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:05,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:05,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:05,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:06,649 INFO L124 PetriNetUnfolderBase]: 10516/14583 cut-off events. [2024-06-21 17:04:06,650 INFO L125 PetriNetUnfolderBase]: For 298900/298903 co-relation queries the response was YES. [2024-06-21 17:04:06,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83347 conditions, 14583 events. 10516/14583 cut-off events. For 298900/298903 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 79615 event pairs, 4270 based on Foata normal form. 18/14593 useless extension candidates. Maximal degree in co-relation 83301. Up to 13655 conditions per place. [2024-06-21 17:04:06,764 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 147 selfloop transitions, 53 changer transitions 0/206 dead transitions. [2024-06-21 17:04:06,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 206 transitions, 2027 flow [2024-06-21 17:04:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:04:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:04:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 17:04:06,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-21 17:04:06,767 INFO L175 Difference]: Start difference. First operand has 113 places, 149 transitions, 1392 flow. Second operand 8 states and 196 transitions. [2024-06-21 17:04:06,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 206 transitions, 2027 flow [2024-06-21 17:04:07,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 206 transitions, 1921 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 17:04:07,016 INFO L231 Difference]: Finished difference. Result has 120 places, 158 transitions, 1553 flow [2024-06-21 17:04:07,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1553, PETRI_PLACES=120, PETRI_TRANSITIONS=158} [2024-06-21 17:04:07,017 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-21 17:04:07,017 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 158 transitions, 1553 flow [2024-06-21 17:04:07,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:07,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:07,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:07,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:04:07,018 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:07,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2000729016, now seen corresponding path program 2 times [2024-06-21 17:04:07,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:07,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795096032] [2024-06-21 17:04:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:07,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:07,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795096032] [2024-06-21 17:04:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795096032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:07,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:07,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:07,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633448808] [2024-06-21 17:04:07,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:07,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:07,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:07,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:07,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:07,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 158 transitions, 1553 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:07,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:07,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:07,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:09,345 INFO L124 PetriNetUnfolderBase]: 10599/14709 cut-off events. [2024-06-21 17:04:09,345 INFO L125 PetriNetUnfolderBase]: For 317846/317858 co-relation queries the response was YES. [2024-06-21 17:04:09,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85199 conditions, 14709 events. 10599/14709 cut-off events. For 317846/317858 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 80479 event pairs, 4309 based on Foata normal form. 12/14713 useless extension candidates. Maximal degree in co-relation 85150. Up to 14196 conditions per place. [2024-06-21 17:04:09,489 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 136 selfloop transitions, 58 changer transitions 0/200 dead transitions. [2024-06-21 17:04:09,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 200 transitions, 2321 flow [2024-06-21 17:04:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 17:04:09,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-21 17:04:09,508 INFO L175 Difference]: Start difference. First operand has 120 places, 158 transitions, 1553 flow. Second operand 7 states and 169 transitions. [2024-06-21 17:04:09,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 200 transitions, 2321 flow [2024-06-21 17:04:09,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 200 transitions, 2231 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 17:04:09,841 INFO L231 Difference]: Finished difference. Result has 125 places, 168 transitions, 1743 flow [2024-06-21 17:04:09,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1743, PETRI_PLACES=125, PETRI_TRANSITIONS=168} [2024-06-21 17:04:09,841 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2024-06-21 17:04:09,841 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 168 transitions, 1743 flow [2024-06-21 17:04:09,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:09,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:09,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:09,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:04:09,842 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:09,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:09,843 INFO L85 PathProgramCache]: Analyzing trace with hash -412950346, now seen corresponding path program 1 times [2024-06-21 17:04:09,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:09,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53041942] [2024-06-21 17:04:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:10,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:10,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53041942] [2024-06-21 17:04:10,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53041942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:10,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:10,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:10,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184634119] [2024-06-21 17:04:10,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:10,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:10,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:10,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:10,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 168 transitions, 1743 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:10,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:10,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:10,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:12,347 INFO L124 PetriNetUnfolderBase]: 10631/14748 cut-off events. [2024-06-21 17:04:12,348 INFO L125 PetriNetUnfolderBase]: For 339241/339247 co-relation queries the response was YES. [2024-06-21 17:04:12,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86381 conditions, 14748 events. 10631/14748 cut-off events. For 339241/339247 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 80506 event pairs, 4257 based on Foata normal form. 5/14748 useless extension candidates. Maximal degree in co-relation 86330. Up to 14428 conditions per place. [2024-06-21 17:04:12,497 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 172 selfloop transitions, 31 changer transitions 0/209 dead transitions. [2024-06-21 17:04:12,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 209 transitions, 2451 flow [2024-06-21 17:04:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 17:04:12,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649859943977591 [2024-06-21 17:04:12,499 INFO L175 Difference]: Start difference. First operand has 125 places, 168 transitions, 1743 flow. Second operand 7 states and 166 transitions. [2024-06-21 17:04:12,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 209 transitions, 2451 flow [2024-06-21 17:04:12,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 209 transitions, 2339 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 17:04:12,792 INFO L231 Difference]: Finished difference. Result has 129 places, 176 transitions, 1842 flow [2024-06-21 17:04:12,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1842, PETRI_PLACES=129, PETRI_TRANSITIONS=176} [2024-06-21 17:04:12,793 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-21 17:04:12,793 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 176 transitions, 1842 flow [2024-06-21 17:04:12,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:12,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:12,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:12,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:04:12,793 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)] === [2024-06-21 17:04:12,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1535586044, now seen corresponding path program 2 times [2024-06-21 17:04:12,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:12,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943528512] [2024-06-21 17:04:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:12,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943528512] [2024-06-21 17:04:13,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943528512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:13,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:13,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:04:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755720474] [2024-06-21 17:04:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:04:13,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:04:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:04:13,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:13,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 176 transitions, 1842 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:13,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:13,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:13,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:15,297 INFO L124 PetriNetUnfolderBase]: 10592/14689 cut-off events. [2024-06-21 17:04:15,297 INFO L125 PetriNetUnfolderBase]: For 373942/373945 co-relation queries the response was YES. [2024-06-21 17:04:15,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88534 conditions, 14689 events. 10592/14689 cut-off events. For 373942/373945 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 80107 event pairs, 3069 based on Foata normal form. 18/14699 useless extension candidates. Maximal degree in co-relation 88482. Up to 13069 conditions per place. [2024-06-21 17:04:15,446 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 151 selfloop transitions, 61 changer transitions 0/218 dead transitions. [2024-06-21 17:04:15,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 218 transitions, 2386 flow [2024-06-21 17:04:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:04:15,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 17:04:15,448 INFO L175 Difference]: Start difference. First operand has 129 places, 176 transitions, 1842 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:04:15,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 218 transitions, 2386 flow [2024-06-21 17:04:15,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 218 transitions, 2292 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 17:04:15,764 INFO L231 Difference]: Finished difference. Result has 133 places, 176 transitions, 1883 flow [2024-06-21 17:04:15,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1883, PETRI_PLACES=133, PETRI_TRANSITIONS=176} [2024-06-21 17:04:15,765 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-21 17:04:15,765 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 176 transitions, 1883 flow [2024-06-21 17:04:15,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:15,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:15,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:15,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:04:15,766 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:15,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash 677005376, now seen corresponding path program 3 times [2024-06-21 17:04:15,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:15,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855320608] [2024-06-21 17:04:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:16,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:16,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855320608] [2024-06-21 17:04:16,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855320608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:16,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:16,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:04:16,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914518782] [2024-06-21 17:04:16,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:16,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:04:16,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:04:16,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:04:16,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:16,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 176 transitions, 1883 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:16,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:16,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:16,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:18,374 INFO L124 PetriNetUnfolderBase]: 10553/14625 cut-off events. [2024-06-21 17:04:18,374 INFO L125 PetriNetUnfolderBase]: For 395097/395106 co-relation queries the response was YES. [2024-06-21 17:04:18,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89308 conditions, 14625 events. 10553/14625 cut-off events. For 395097/395106 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79562 event pairs, 2557 based on Foata normal form. 19/14619 useless extension candidates. Maximal degree in co-relation 89254. Up to 12830 conditions per place. [2024-06-21 17:04:18,492 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 145 selfloop transitions, 63 changer transitions 0/214 dead transitions. [2024-06-21 17:04:18,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 214 transitions, 2417 flow [2024-06-21 17:04:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:04:18,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:04:18,494 INFO L175 Difference]: Start difference. First operand has 133 places, 176 transitions, 1883 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:04:18,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 214 transitions, 2417 flow [2024-06-21 17:04:18,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 214 transitions, 2255 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:04:18,687 INFO L231 Difference]: Finished difference. Result has 133 places, 177 transitions, 1870 flow [2024-06-21 17:04:18,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1870, PETRI_PLACES=133, PETRI_TRANSITIONS=177} [2024-06-21 17:04:18,688 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-21 17:04:18,688 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 177 transitions, 1870 flow [2024-06-21 17:04:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:18,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:18,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:18,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:04:18,689 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:18,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash -58687678, now seen corresponding path program 3 times [2024-06-21 17:04:18,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:18,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569024954] [2024-06-21 17:04:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:18,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:19,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:19,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569024954] [2024-06-21 17:04:19,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569024954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:19,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:19,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:19,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445603136] [2024-06-21 17:04:19,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:19,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:19,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:19,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:19,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 177 transitions, 1870 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:19,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:19,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:19,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:21,203 INFO L124 PetriNetUnfolderBase]: 10544/14626 cut-off events. [2024-06-21 17:04:21,203 INFO L125 PetriNetUnfolderBase]: For 392714/392741 co-relation queries the response was YES. [2024-06-21 17:04:21,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89732 conditions, 14626 events. 10544/14626 cut-off events. For 392714/392741 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79754 event pairs, 4280 based on Foata normal form. 19/14628 useless extension candidates. Maximal degree in co-relation 89677. Up to 14119 conditions per place. [2024-06-21 17:04:21,346 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 139 selfloop transitions, 58 changer transitions 0/203 dead transitions. [2024-06-21 17:04:21,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 203 transitions, 2520 flow [2024-06-21 17:04:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 17:04:21,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-21 17:04:21,347 INFO L175 Difference]: Start difference. First operand has 133 places, 177 transitions, 1870 flow. Second operand 7 states and 163 transitions. [2024-06-21 17:04:21,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 203 transitions, 2520 flow [2024-06-21 17:04:21,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 203 transitions, 2337 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 17:04:21,615 INFO L231 Difference]: Finished difference. Result has 135 places, 177 transitions, 1814 flow [2024-06-21 17:04:21,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1814, PETRI_PLACES=135, PETRI_TRANSITIONS=177} [2024-06-21 17:04:21,616 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2024-06-21 17:04:21,616 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 177 transitions, 1814 flow [2024-06-21 17:04:21,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:21,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:21,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:21,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:04:21,617 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)] === [2024-06-21 17:04:21,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1490351190, now seen corresponding path program 2 times [2024-06-21 17:04:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:21,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487133726] [2024-06-21 17:04:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:21,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:22,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:22,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487133726] [2024-06-21 17:04:22,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487133726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:22,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:22,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760716273] [2024-06-21 17:04:22,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:22,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:22,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:22,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:22,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:22,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 177 transitions, 1814 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:22,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:22,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:22,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:24,226 INFO L124 PetriNetUnfolderBase]: 10576/14669 cut-off events. [2024-06-21 17:04:24,226 INFO L125 PetriNetUnfolderBase]: For 413801/413816 co-relation queries the response was YES. [2024-06-21 17:04:24,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90360 conditions, 14669 events. 10576/14669 cut-off events. For 413801/413816 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79871 event pairs, 4209 based on Foata normal form. 14/14676 useless extension candidates. Maximal degree in co-relation 90304. Up to 14332 conditions per place. [2024-06-21 17:04:24,369 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 167 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-21 17:04:24,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 208 transitions, 2456 flow [2024-06-21 17:04:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 17:04:24,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44537815126050423 [2024-06-21 17:04:24,371 INFO L175 Difference]: Start difference. First operand has 135 places, 177 transitions, 1814 flow. Second operand 7 states and 159 transitions. [2024-06-21 17:04:24,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 208 transitions, 2456 flow [2024-06-21 17:04:24,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 208 transitions, 2297 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:04:24,636 INFO L231 Difference]: Finished difference. Result has 136 places, 181 transitions, 1806 flow [2024-06-21 17:04:24,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1806, PETRI_PLACES=136, PETRI_TRANSITIONS=181} [2024-06-21 17:04:24,637 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-21 17:04:24,637 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 181 transitions, 1806 flow [2024-06-21 17:04:24,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:24,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:24,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:24,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:04:24,638 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:24,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:24,638 INFO L85 PathProgramCache]: Analyzing trace with hash -58271596, now seen corresponding path program 3 times [2024-06-21 17:04:24,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:24,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601265272] [2024-06-21 17:04:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:24,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:25,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:25,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601265272] [2024-06-21 17:04:25,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601265272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:25,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:25,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:25,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477972135] [2024-06-21 17:04:25,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:25,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:25,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:25,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:25,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 181 transitions, 1806 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:25,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:25,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:25,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:27,171 INFO L124 PetriNetUnfolderBase]: 10562/14651 cut-off events. [2024-06-21 17:04:27,171 INFO L125 PetriNetUnfolderBase]: For 437203/437218 co-relation queries the response was YES. [2024-06-21 17:04:27,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90575 conditions, 14651 events. 10562/14651 cut-off events. For 437203/437218 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79858 event pairs, 4209 based on Foata normal form. 14/14658 useless extension candidates. Maximal degree in co-relation 90520. Up to 14320 conditions per place. [2024-06-21 17:04:27,286 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 163 selfloop transitions, 36 changer transitions 0/205 dead transitions. [2024-06-21 17:04:27,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 205 transitions, 2264 flow [2024-06-21 17:04:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 17:04:27,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341736694677871 [2024-06-21 17:04:27,287 INFO L175 Difference]: Start difference. First operand has 136 places, 181 transitions, 1806 flow. Second operand 7 states and 155 transitions. [2024-06-21 17:04:27,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 205 transitions, 2264 flow [2024-06-21 17:04:27,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 205 transitions, 2091 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 17:04:27,565 INFO L231 Difference]: Finished difference. Result has 138 places, 181 transitions, 1714 flow [2024-06-21 17:04:27,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1714, PETRI_PLACES=138, PETRI_TRANSITIONS=181} [2024-06-21 17:04:27,566 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-21 17:04:27,566 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 181 transitions, 1714 flow [2024-06-21 17:04:27,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:27,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:27,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:27,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:04:27,567 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:27,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash -235754470, now seen corresponding path program 1 times [2024-06-21 17:04:27,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:27,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039126810] [2024-06-21 17:04:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:27,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:28,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039126810] [2024-06-21 17:04:28,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039126810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:28,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:28,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:28,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54374533] [2024-06-21 17:04:28,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:28,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:28,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:28,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:04:28,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 181 transitions, 1714 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:28,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:28,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:04:28,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:29,765 INFO L124 PetriNetUnfolderBase]: 9183/13041 cut-off events. [2024-06-21 17:04:29,765 INFO L125 PetriNetUnfolderBase]: For 386811/386811 co-relation queries the response was YES. [2024-06-21 17:04:29,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80073 conditions, 13041 events. 9183/13041 cut-off events. For 386811/386811 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 73013 event pairs, 3499 based on Foata normal form. 2/13033 useless extension candidates. Maximal degree in co-relation 80017. Up to 12582 conditions per place. [2024-06-21 17:04:29,885 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 188 selfloop transitions, 18 changer transitions 0/213 dead transitions. [2024-06-21 17:04:29,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 213 transitions, 2256 flow [2024-06-21 17:04:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 17:04:29,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453781512605042 [2024-06-21 17:04:29,886 INFO L175 Difference]: Start difference. First operand has 138 places, 181 transitions, 1714 flow. Second operand 7 states and 162 transitions. [2024-06-21 17:04:29,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 213 transitions, 2256 flow [2024-06-21 17:04:30,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2167 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:04:30,250 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1736 flow [2024-06-21 17:04:30,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2024-06-21 17:04:30,251 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 85 predicate places. [2024-06-21 17:04:30,251 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1736 flow [2024-06-21 17:04:30,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:30,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:30,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:30,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:04:30,252 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:30,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -235634314, now seen corresponding path program 1 times [2024-06-21 17:04:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:30,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916868822] [2024-06-21 17:04:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:30,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:30,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916868822] [2024-06-21 17:04:30,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916868822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:30,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:30,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:30,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786737883] [2024-06-21 17:04:30,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:30,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:30,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:30,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:30,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:30,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:04:30,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1736 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:30,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:30,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:04:30,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:32,380 INFO L124 PetriNetUnfolderBase]: 9215/13074 cut-off events. [2024-06-21 17:04:32,381 INFO L125 PetriNetUnfolderBase]: For 421035/421038 co-relation queries the response was YES. [2024-06-21 17:04:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82911 conditions, 13074 events. 9215/13074 cut-off events. For 421035/421038 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 73279 event pairs, 3480 based on Foata normal form. 4/13065 useless extension candidates. Maximal degree in co-relation 82854. Up to 12551 conditions per place. [2024-06-21 17:04:32,491 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 185 selfloop transitions, 31 changer transitions 0/223 dead transitions. [2024-06-21 17:04:32,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 223 transitions, 2478 flow [2024-06-21 17:04:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:04:32,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:04:32,492 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1736 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:04:32,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 223 transitions, 2478 flow [2024-06-21 17:04:32,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 223 transitions, 2397 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 17:04:32,811 INFO L231 Difference]: Finished difference. Result has 141 places, 193 transitions, 1858 flow [2024-06-21 17:04:32,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1858, PETRI_PLACES=141, PETRI_TRANSITIONS=193} [2024-06-21 17:04:32,812 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 87 predicate places. [2024-06-21 17:04:32,812 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 193 transitions, 1858 flow [2024-06-21 17:04:32,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:32,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:32,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:32,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:04:32,812 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:32,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:32,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1151634856, now seen corresponding path program 2 times [2024-06-21 17:04:32,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:32,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797003915] [2024-06-21 17:04:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:32,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:33,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:33,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797003915] [2024-06-21 17:04:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797003915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:33,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:33,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:33,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107237348] [2024-06-21 17:04:33,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:33,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:33,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:04:33,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 193 transitions, 1858 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:33,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:33,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:04:33,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:35,061 INFO L124 PetriNetUnfolderBase]: 9231/13132 cut-off events. [2024-06-21 17:04:35,061 INFO L125 PetriNetUnfolderBase]: For 454543/454546 co-relation queries the response was YES. [2024-06-21 17:04:35,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85818 conditions, 13132 events. 9231/13132 cut-off events. For 454543/454546 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 74183 event pairs, 3492 based on Foata normal form. 4/13131 useless extension candidates. Maximal degree in co-relation 85760. Up to 12598 conditions per place. [2024-06-21 17:04:35,181 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 186 selfloop transitions, 35 changer transitions 0/228 dead transitions. [2024-06-21 17:04:35,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 228 transitions, 2624 flow [2024-06-21 17:04:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 17:04:35,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46218487394957986 [2024-06-21 17:04:35,183 INFO L175 Difference]: Start difference. First operand has 141 places, 193 transitions, 1858 flow. Second operand 7 states and 165 transitions. [2024-06-21 17:04:35,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 228 transitions, 2624 flow [2024-06-21 17:04:35,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 228 transitions, 2544 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 17:04:35,634 INFO L231 Difference]: Finished difference. Result has 145 places, 201 transitions, 2005 flow [2024-06-21 17:04:35,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2005, PETRI_PLACES=145, PETRI_TRANSITIONS=201} [2024-06-21 17:04:35,635 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-21 17:04:35,635 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 201 transitions, 2005 flow [2024-06-21 17:04:35,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:35,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:35,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:35,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:04:35,639 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:35,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1921678606, now seen corresponding path program 2 times [2024-06-21 17:04:35,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:35,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625899921] [2024-06-21 17:04:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:35,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:36,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:36,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625899921] [2024-06-21 17:04:36,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625899921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:36,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:36,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:36,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567629137] [2024-06-21 17:04:36,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:36,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:36,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:36,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:36,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:04:36,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 201 transitions, 2005 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:36,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:36,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:04:36,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:37,958 INFO L124 PetriNetUnfolderBase]: 9263/13175 cut-off events. [2024-06-21 17:04:37,958 INFO L125 PetriNetUnfolderBase]: For 491551/491557 co-relation queries the response was YES. [2024-06-21 17:04:38,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88751 conditions, 13175 events. 9263/13175 cut-off events. For 491551/491557 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 74251 event pairs, 3461 based on Foata normal form. 8/13177 useless extension candidates. Maximal degree in co-relation 88691. Up to 12601 conditions per place. [2024-06-21 17:04:38,092 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 188 selfloop transitions, 36 changer transitions 0/231 dead transitions. [2024-06-21 17:04:38,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 231 transitions, 2699 flow [2024-06-21 17:04:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 17:04:38,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-21 17:04:38,094 INFO L175 Difference]: Start difference. First operand has 145 places, 201 transitions, 2005 flow. Second operand 7 states and 163 transitions. [2024-06-21 17:04:38,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 231 transitions, 2699 flow [2024-06-21 17:04:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 231 transitions, 2611 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 17:04:38,427 INFO L231 Difference]: Finished difference. Result has 149 places, 205 transitions, 2060 flow [2024-06-21 17:04:38,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2060, PETRI_PLACES=149, PETRI_TRANSITIONS=205} [2024-06-21 17:04:38,427 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2024-06-21 17:04:38,427 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 205 transitions, 2060 flow [2024-06-21 17:04:38,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:38,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:38,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:38,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:04:38,428 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)] === [2024-06-21 17:04:38,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash -230992870, now seen corresponding path program 3 times [2024-06-21 17:04:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:38,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591467338] [2024-06-21 17:04:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:38,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591467338] [2024-06-21 17:04:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591467338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:39,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:39,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:39,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024111925] [2024-06-21 17:04:39,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:39,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:39,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:39,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:04:39,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 205 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:39,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:39,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:04:39,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:40,904 INFO L124 PetriNetUnfolderBase]: 9256/13163 cut-off events. [2024-06-21 17:04:40,904 INFO L125 PetriNetUnfolderBase]: For 514827/514830 co-relation queries the response was YES. [2024-06-21 17:04:40,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89573 conditions, 13163 events. 9256/13163 cut-off events. For 514827/514830 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 74216 event pairs, 3502 based on Foata normal form. 2/13157 useless extension candidates. Maximal degree in co-relation 89511. Up to 12633 conditions per place. [2024-06-21 17:04:41,031 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 185 selfloop transitions, 35 changer transitions 0/227 dead transitions. [2024-06-21 17:04:41,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 227 transitions, 2556 flow [2024-06-21 17:04:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 17:04:41,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481792717086835 [2024-06-21 17:04:41,033 INFO L175 Difference]: Start difference. First operand has 149 places, 205 transitions, 2060 flow. Second operand 7 states and 160 transitions. [2024-06-21 17:04:41,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 227 transitions, 2556 flow [2024-06-21 17:04:41,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 227 transitions, 2408 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 17:04:41,379 INFO L231 Difference]: Finished difference. Result has 152 places, 205 transitions, 1991 flow [2024-06-21 17:04:41,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1991, PETRI_PLACES=152, PETRI_TRANSITIONS=205} [2024-06-21 17:04:41,379 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-21 17:04:41,379 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 205 transitions, 1991 flow [2024-06-21 17:04:41,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:41,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:41,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:41,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:04:41,380 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:41,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:41,381 INFO L85 PathProgramCache]: Analyzing trace with hash 793830630, now seen corresponding path program 3 times [2024-06-21 17:04:41,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:41,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78690351] [2024-06-21 17:04:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:41,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:41,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78690351] [2024-06-21 17:04:41,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78690351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:41,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:41,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:41,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005601719] [2024-06-21 17:04:41,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:41,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:41,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:42,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:04:42,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 205 transitions, 1991 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:42,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:42,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:04:42,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:43,695 INFO L124 PetriNetUnfolderBase]: 9242/13148 cut-off events. [2024-06-21 17:04:43,695 INFO L125 PetriNetUnfolderBase]: For 538469/538475 co-relation queries the response was YES. [2024-06-21 17:04:43,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89892 conditions, 13148 events. 9242/13148 cut-off events. For 538469/538475 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 74179 event pairs, 3459 based on Foata normal form. 8/13150 useless extension candidates. Maximal degree in co-relation 89829. Up to 12580 conditions per place. [2024-06-21 17:04:43,833 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 188 selfloop transitions, 35 changer transitions 0/230 dead transitions. [2024-06-21 17:04:43,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 230 transitions, 2499 flow [2024-06-21 17:04:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 17:04:43,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-21 17:04:43,834 INFO L175 Difference]: Start difference. First operand has 152 places, 205 transitions, 1991 flow. Second operand 7 states and 163 transitions. [2024-06-21 17:04:43,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 230 transitions, 2499 flow [2024-06-21 17:04:44,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 230 transitions, 2353 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:04:44,338 INFO L231 Difference]: Finished difference. Result has 152 places, 205 transitions, 1924 flow [2024-06-21 17:04:44,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1924, PETRI_PLACES=152, PETRI_TRANSITIONS=205} [2024-06-21 17:04:44,339 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-21 17:04:44,339 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 205 transitions, 1924 flow [2024-06-21 17:04:44,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:44,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:44,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:44,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:04:44,339 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:44,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash -58256716, now seen corresponding path program 1 times [2024-06-21 17:04:44,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:44,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820610969] [2024-06-21 17:04:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:45,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:45,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820610969] [2024-06-21 17:04:45,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820610969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:45,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:45,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:04:45,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358252997] [2024-06-21 17:04:45,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:04:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:04:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:04:45,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:04:45,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 205 transitions, 1924 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:45,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:45,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:04:45,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:47,007 INFO L124 PetriNetUnfolderBase]: 9230/13128 cut-off events. [2024-06-21 17:04:47,007 INFO L125 PetriNetUnfolderBase]: For 558384/558384 co-relation queries the response was YES. [2024-06-21 17:04:47,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89847 conditions, 13128 events. 9230/13128 cut-off events. For 558384/558384 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 73891 event pairs, 3448 based on Foata normal form. 4/13128 useless extension candidates. Maximal degree in co-relation 89784. Up to 12638 conditions per place. [2024-06-21 17:04:47,145 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 208 selfloop transitions, 17 changer transitions 0/232 dead transitions. [2024-06-21 17:04:47,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 232 transitions, 2508 flow [2024-06-21 17:04:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 17:04:47,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43977591036414565 [2024-06-21 17:04:47,147 INFO L175 Difference]: Start difference. First operand has 152 places, 205 transitions, 1924 flow. Second operand 7 states and 157 transitions. [2024-06-21 17:04:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 232 transitions, 2508 flow [2024-06-21 17:04:47,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 232 transitions, 2410 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:04:47,531 INFO L231 Difference]: Finished difference. Result has 152 places, 208 transitions, 1948 flow [2024-06-21 17:04:47,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1948, PETRI_PLACES=152, PETRI_TRANSITIONS=208} [2024-06-21 17:04:47,531 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-21 17:04:47,532 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 208 transitions, 1948 flow [2024-06-21 17:04:47,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:47,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:47,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:47,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:04:47,532 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:47,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:47,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1702657354, now seen corresponding path program 1 times [2024-06-21 17:04:47,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:47,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569445827] [2024-06-21 17:04:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:47,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:48,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:48,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569445827] [2024-06-21 17:04:48,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569445827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:48,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:48,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:04:48,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876766220] [2024-06-21 17:04:48,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:48,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:04:48,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:04:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:04:48,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:04:48,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 208 transitions, 1948 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:48,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:48,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:04:48,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:49,582 INFO L124 PetriNetUnfolderBase]: 8790/12847 cut-off events. [2024-06-21 17:04:49,582 INFO L125 PetriNetUnfolderBase]: For 565555/565739 co-relation queries the response was YES. [2024-06-21 17:04:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89565 conditions, 12847 events. 8790/12847 cut-off events. For 565555/565739 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 75782 event pairs, 3351 based on Foata normal form. 1/12714 useless extension candidates. Maximal degree in co-relation 89501. Up to 11960 conditions per place. [2024-06-21 17:04:49,924 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 191 selfloop transitions, 10 changer transitions 0/223 dead transitions. [2024-06-21 17:04:49,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 223 transitions, 2440 flow [2024-06-21 17:04:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:04:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:04:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-21 17:04:49,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549019607843137 [2024-06-21 17:04:49,925 INFO L175 Difference]: Start difference. First operand has 152 places, 208 transitions, 1948 flow. Second operand 5 states and 116 transitions. [2024-06-21 17:04:49,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 223 transitions, 2440 flow [2024-06-21 17:04:50,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 223 transitions, 2342 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 17:04:50,383 INFO L231 Difference]: Finished difference. Result has 152 places, 212 transitions, 1947 flow [2024-06-21 17:04:50,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1947, PETRI_PLACES=152, PETRI_TRANSITIONS=212} [2024-06-21 17:04:50,384 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-21 17:04:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 212 transitions, 1947 flow [2024-06-21 17:04:50,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:50,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:50,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:50,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:04:50,385 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:50,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash -133330472, now seen corresponding path program 1 times [2024-06-21 17:04:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:50,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732311608] [2024-06-21 17:04:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:51,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732311608] [2024-06-21 17:04:51,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732311608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:51,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:51,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:04:51,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988877921] [2024-06-21 17:04:51,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:51,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:04:51,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:51,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:04:51,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:04:51,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:51,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 212 transitions, 1947 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:51,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:51,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:51,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:53,322 INFO L124 PetriNetUnfolderBase]: 10727/14896 cut-off events. [2024-06-21 17:04:53,322 INFO L125 PetriNetUnfolderBase]: For 723523/723532 co-relation queries the response was YES. [2024-06-21 17:04:53,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108412 conditions, 14896 events. 10727/14896 cut-off events. For 723523/723532 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 81306 event pairs, 4099 based on Foata normal form. 12/14900 useless extension candidates. Maximal degree in co-relation 108347. Up to 13932 conditions per place. [2024-06-21 17:04:53,516 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 174 selfloop transitions, 93 changer transitions 0/273 dead transitions. [2024-06-21 17:04:53,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 273 transitions, 3125 flow [2024-06-21 17:04:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:04:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:04:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 17:04:53,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2024-06-21 17:04:53,518 INFO L175 Difference]: Start difference. First operand has 152 places, 212 transitions, 1947 flow. Second operand 8 states and 201 transitions. [2024-06-21 17:04:53,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 273 transitions, 3125 flow [2024-06-21 17:04:54,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 273 transitions, 3056 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 17:04:54,268 INFO L231 Difference]: Finished difference. Result has 158 places, 227 transitions, 2390 flow [2024-06-21 17:04:54,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2390, PETRI_PLACES=158, PETRI_TRANSITIONS=227} [2024-06-21 17:04:54,269 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 104 predicate places. [2024-06-21 17:04:54,269 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 227 transitions, 2390 flow [2024-06-21 17:04:54,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:54,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:54,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:04:54,270 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:54,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash -129786335, now seen corresponding path program 1 times [2024-06-21 17:04:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352070908] [2024-06-21 17:04:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:54,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:54,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352070908] [2024-06-21 17:04:54,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352070908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:54,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:54,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:54,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999923276] [2024-06-21 17:04:54,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:54,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:54,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:54,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:54,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:54,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:54,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 227 transitions, 2390 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:54,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:54,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:54,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:04:57,066 INFO L124 PetriNetUnfolderBase]: 10805/14981 cut-off events. [2024-06-21 17:04:57,067 INFO L125 PetriNetUnfolderBase]: For 780952/780961 co-relation queries the response was YES. [2024-06-21 17:04:57,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114443 conditions, 14981 events. 10805/14981 cut-off events. For 780952/780961 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 81485 event pairs, 4172 based on Foata normal form. 10/14983 useless extension candidates. Maximal degree in co-relation 114376. Up to 14423 conditions per place. [2024-06-21 17:04:57,238 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 196 selfloop transitions, 73 changer transitions 0/275 dead transitions. [2024-06-21 17:04:57,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 275 transitions, 3516 flow [2024-06-21 17:04:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:04:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:04:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 17:04:57,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2024-06-21 17:04:57,239 INFO L175 Difference]: Start difference. First operand has 158 places, 227 transitions, 2390 flow. Second operand 7 states and 171 transitions. [2024-06-21 17:04:57,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 275 transitions, 3516 flow [2024-06-21 17:04:57,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 275 transitions, 3365 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-21 17:04:57,862 INFO L231 Difference]: Finished difference. Result has 163 places, 240 transitions, 2637 flow [2024-06-21 17:04:57,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2637, PETRI_PLACES=163, PETRI_TRANSITIONS=240} [2024-06-21 17:04:57,863 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-06-21 17:04:57,863 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 240 transitions, 2637 flow [2024-06-21 17:04:57,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:57,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:04:57,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:04:57,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:04:57,864 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:04:57,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:04:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1893063217, now seen corresponding path program 2 times [2024-06-21 17:04:57,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:04:57,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469989716] [2024-06-21 17:04:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:04:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:04:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:04:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:04:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:04:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469989716] [2024-06-21 17:04:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469989716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:04:58,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:04:58,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:04:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124886448] [2024-06-21 17:04:58,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:04:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:04:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:04:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:04:58,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:04:58,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:04:58,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 240 transitions, 2637 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:04:58,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:04:58,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:04:58,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:01,461 INFO L124 PetriNetUnfolderBase]: 10791/14973 cut-off events. [2024-06-21 17:05:01,462 INFO L125 PetriNetUnfolderBase]: For 805221/805230 co-relation queries the response was YES. [2024-06-21 17:05:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114599 conditions, 14973 events. 10791/14973 cut-off events. For 805221/805230 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 81617 event pairs, 4177 based on Foata normal form. 10/14975 useless extension candidates. Maximal degree in co-relation 114529. Up to 14411 conditions per place. [2024-06-21 17:05:01,619 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 197 selfloop transitions, 69 changer transitions 0/272 dead transitions. [2024-06-21 17:05:01,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 272 transitions, 3541 flow [2024-06-21 17:05:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:05:01,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:05:01,622 INFO L175 Difference]: Start difference. First operand has 163 places, 240 transitions, 2637 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:05:01,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 272 transitions, 3541 flow [2024-06-21 17:05:02,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 272 transitions, 3421 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:02,267 INFO L231 Difference]: Finished difference. Result has 167 places, 240 transitions, 2667 flow [2024-06-21 17:05:02,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2667, PETRI_PLACES=167, PETRI_TRANSITIONS=240} [2024-06-21 17:05:02,268 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2024-06-21 17:05:02,268 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 240 transitions, 2667 flow [2024-06-21 17:05:02,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:02,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:02,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:02,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:05:02,269 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:05:02,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash 83443028, now seen corresponding path program 2 times [2024-06-21 17:05:02,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:02,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481368010] [2024-06-21 17:05:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:02,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:03,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:03,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481368010] [2024-06-21 17:05:03,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481368010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:03,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:03,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:03,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663026552] [2024-06-21 17:05:03,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:03,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:03,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:03,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:05:03,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 240 transitions, 2667 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:03,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:03,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:05:03,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:06,010 INFO L124 PetriNetUnfolderBase]: 11049/15331 cut-off events. [2024-06-21 17:05:06,010 INFO L125 PetriNetUnfolderBase]: For 858624/858633 co-relation queries the response was YES. [2024-06-21 17:05:06,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118268 conditions, 15331 events. 11049/15331 cut-off events. For 858624/858633 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83893 event pairs, 4118 based on Foata normal form. 12/15335 useless extension candidates. Maximal degree in co-relation 118197. Up to 14159 conditions per place. [2024-06-21 17:05:06,156 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 185 selfloop transitions, 106 changer transitions 0/297 dead transitions. [2024-06-21 17:05:06,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 297 transitions, 4032 flow [2024-06-21 17:05:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 17:05:06,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48284313725490197 [2024-06-21 17:05:06,157 INFO L175 Difference]: Start difference. First operand has 167 places, 240 transitions, 2667 flow. Second operand 8 states and 197 transitions. [2024-06-21 17:05:06,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 297 transitions, 4032 flow [2024-06-21 17:05:06,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 297 transitions, 3901 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:06,799 INFO L231 Difference]: Finished difference. Result has 172 places, 254 transitions, 2994 flow [2024-06-21 17:05:06,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2994, PETRI_PLACES=172, PETRI_TRANSITIONS=254} [2024-06-21 17:05:06,800 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 118 predicate places. [2024-06-21 17:05:06,800 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 254 transitions, 2994 flow [2024-06-21 17:05:06,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:06,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:06,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:06,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:05:06,801 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:05:06,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:06,801 INFO L85 PathProgramCache]: Analyzing trace with hash -124076042, now seen corresponding path program 3 times [2024-06-21 17:05:06,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:06,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268054438] [2024-06-21 17:05:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:06,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:07,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:07,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268054438] [2024-06-21 17:05:07,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268054438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:07,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:07,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:07,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744250889] [2024-06-21 17:05:07,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:07,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:07,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:07,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:05:07,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 254 transitions, 2994 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:07,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:07,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:05:07,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:10,187 INFO L124 PetriNetUnfolderBase]: 11031/15315 cut-off events. [2024-06-21 17:05:10,188 INFO L125 PetriNetUnfolderBase]: For 893945/893954 co-relation queries the response was YES. [2024-06-21 17:05:10,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119606 conditions, 15315 events. 11031/15315 cut-off events. For 893945/893954 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83861 event pairs, 4105 based on Foata normal form. 12/15319 useless extension candidates. Maximal degree in co-relation 119533. Up to 14151 conditions per place. [2024-06-21 17:05:10,327 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 183 selfloop transitions, 107 changer transitions 0/296 dead transitions. [2024-06-21 17:05:10,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 296 transitions, 4007 flow [2024-06-21 17:05:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 17:05:10,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48284313725490197 [2024-06-21 17:05:10,329 INFO L175 Difference]: Start difference. First operand has 172 places, 254 transitions, 2994 flow. Second operand 8 states and 197 transitions. [2024-06-21 17:05:10,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 296 transitions, 4007 flow [2024-06-21 17:05:11,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 296 transitions, 3794 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:11,097 INFO L231 Difference]: Finished difference. Result has 176 places, 255 transitions, 3032 flow [2024-06-21 17:05:11,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2781, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3032, PETRI_PLACES=176, PETRI_TRANSITIONS=255} [2024-06-21 17:05:11,098 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 122 predicate places. [2024-06-21 17:05:11,098 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 255 transitions, 3032 flow [2024-06-21 17:05:11,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:11,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:11,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:11,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:05:11,099 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:05:11,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:11,099 INFO L85 PathProgramCache]: Analyzing trace with hash 86109819, now seen corresponding path program 3 times [2024-06-21 17:05:11,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:11,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50159649] [2024-06-21 17:05:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:11,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:11,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50159649] [2024-06-21 17:05:11,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50159649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:11,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:11,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:11,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529143015] [2024-06-21 17:05:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:11,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:11,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:05:11,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 255 transitions, 3032 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:11,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:11,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:05:11,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:14,426 INFO L124 PetriNetUnfolderBase]: 11009/15278 cut-off events. [2024-06-21 17:05:14,426 INFO L125 PetriNetUnfolderBase]: For 925603/925615 co-relation queries the response was YES. [2024-06-21 17:05:14,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120058 conditions, 15278 events. 11009/15278 cut-off events. For 925603/925615 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83514 event pairs, 4260 based on Foata normal form. 8/15267 useless extension candidates. Maximal degree in co-relation 119984. Up to 14701 conditions per place. [2024-06-21 17:05:14,565 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 205 selfloop transitions, 76 changer transitions 0/287 dead transitions. [2024-06-21 17:05:14,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 287 transitions, 3990 flow [2024-06-21 17:05:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:05:14,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:05:14,572 INFO L175 Difference]: Start difference. First operand has 176 places, 255 transitions, 3032 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:05:14,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 287 transitions, 3990 flow [2024-06-21 17:05:15,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 287 transitions, 3743 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:15,419 INFO L231 Difference]: Finished difference. Result has 178 places, 255 transitions, 2946 flow [2024-06-21 17:05:15,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2946, PETRI_PLACES=178, PETRI_TRANSITIONS=255} [2024-06-21 17:05:15,421 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2024-06-21 17:05:15,421 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 255 transitions, 2946 flow [2024-06-21 17:05:15,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:15,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:15,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:15,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:05:15,424 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:05:15,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1285259239, now seen corresponding path program 4 times [2024-06-21 17:05:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:15,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608936911] [2024-06-21 17:05:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:15,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:16,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:16,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608936911] [2024-06-21 17:05:16,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608936911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:16,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:16,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:16,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118857374] [2024-06-21 17:05:16,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:16,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:16,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:16,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:16,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:05:16,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 255 transitions, 2946 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:16,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:16,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:05:16,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:18,633 INFO L124 PetriNetUnfolderBase]: 11025/15289 cut-off events. [2024-06-21 17:05:18,633 INFO L125 PetriNetUnfolderBase]: For 963238/963244 co-relation queries the response was YES. [2024-06-21 17:05:18,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120619 conditions, 15289 events. 11025/15289 cut-off events. For 963238/963244 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83472 event pairs, 4246 based on Foata normal form. 4/15274 useless extension candidates. Maximal degree in co-relation 120544. Up to 14713 conditions per place. [2024-06-21 17:05:18,784 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 200 selfloop transitions, 80 changer transitions 0/286 dead transitions. [2024-06-21 17:05:18,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 286 transitions, 3822 flow [2024-06-21 17:05:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 17:05:18,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2024-06-21 17:05:18,790 INFO L175 Difference]: Start difference. First operand has 178 places, 255 transitions, 2946 flow. Second operand 7 states and 164 transitions. [2024-06-21 17:05:18,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 286 transitions, 3822 flow [2024-06-21 17:05:19,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 286 transitions, 3481 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 17:05:19,790 INFO L231 Difference]: Finished difference. Result has 176 places, 259 transitions, 2860 flow [2024-06-21 17:05:19,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2624, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2860, PETRI_PLACES=176, PETRI_TRANSITIONS=259} [2024-06-21 17:05:19,791 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 122 predicate places. [2024-06-21 17:05:19,791 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 259 transitions, 2860 flow [2024-06-21 17:05:19,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:19,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:19,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:19,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:05:19,791 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:05:19,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash 550142089, now seen corresponding path program 5 times [2024-06-21 17:05:19,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:19,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867735696] [2024-06-21 17:05:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:19,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:20,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:20,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867735696] [2024-06-21 17:05:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867735696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:20,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:20,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:20,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429820287] [2024-06-21 17:05:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:20,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:20,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:20,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:05:20,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 259 transitions, 2860 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:20,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:20,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:05:20,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:23,117 INFO L124 PetriNetUnfolderBase]: 11018/15291 cut-off events. [2024-06-21 17:05:23,117 INFO L125 PetriNetUnfolderBase]: For 999344/999368 co-relation queries the response was YES. [2024-06-21 17:05:23,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121079 conditions, 15291 events. 11018/15291 cut-off events. For 999344/999368 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83640 event pairs, 4238 based on Foata normal form. 16/15290 useless extension candidates. Maximal degree in co-relation 121004. Up to 14708 conditions per place. [2024-06-21 17:05:23,284 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 202 selfloop transitions, 75 changer transitions 0/283 dead transitions. [2024-06-21 17:05:23,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 283 transitions, 3640 flow [2024-06-21 17:05:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 17:05:23,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481792717086835 [2024-06-21 17:05:23,286 INFO L175 Difference]: Start difference. First operand has 176 places, 259 transitions, 2860 flow. Second operand 7 states and 160 transitions. [2024-06-21 17:05:23,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 283 transitions, 3640 flow [2024-06-21 17:05:24,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 283 transitions, 3471 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:24,093 INFO L231 Difference]: Finished difference. Result has 179 places, 259 transitions, 2850 flow [2024-06-21 17:05:24,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2691, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2850, PETRI_PLACES=179, PETRI_TRANSITIONS=259} [2024-06-21 17:05:24,094 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 125 predicate places. [2024-06-21 17:05:24,094 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 259 transitions, 2850 flow [2024-06-21 17:05:24,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:24,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:24,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:24,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:05:24,095 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:05:24,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:24,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1484619455, now seen corresponding path program 6 times [2024-06-21 17:05:24,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:24,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397949838] [2024-06-21 17:05:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:24,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:24,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:24,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397949838] [2024-06-21 17:05:24,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397949838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:24,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:24,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:24,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535694627] [2024-06-21 17:05:24,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:24,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:24,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:24,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:24,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:24,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:05:24,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 259 transitions, 2850 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:24,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:24,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:05:24,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:27,259 INFO L124 PetriNetUnfolderBase]: 10999/15264 cut-off events. [2024-06-21 17:05:27,259 INFO L125 PetriNetUnfolderBase]: For 1038410/1038428 co-relation queries the response was YES. [2024-06-21 17:05:27,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121670 conditions, 15264 events. 10999/15264 cut-off events. For 1038410/1038428 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83324 event pairs, 4238 based on Foata normal form. 14/15261 useless extension candidates. Maximal degree in co-relation 121594. Up to 14689 conditions per place. [2024-06-21 17:05:27,441 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 204 selfloop transitions, 71 changer transitions 0/281 dead transitions. [2024-06-21 17:05:27,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 281 transitions, 3456 flow [2024-06-21 17:05:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-21 17:05:27,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44537815126050423 [2024-06-21 17:05:27,443 INFO L175 Difference]: Start difference. First operand has 179 places, 259 transitions, 2850 flow. Second operand 7 states and 159 transitions. [2024-06-21 17:05:27,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 281 transitions, 3456 flow [2024-06-21 17:05:28,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 281 transitions, 3267 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:28,230 INFO L231 Difference]: Finished difference. Result has 181 places, 259 transitions, 2814 flow [2024-06-21 17:05:28,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2814, PETRI_PLACES=181, PETRI_TRANSITIONS=259} [2024-06-21 17:05:28,231 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2024-06-21 17:05:28,231 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 259 transitions, 2814 flow [2024-06-21 17:05:28,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:28,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:28,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:05:28,232 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:05:28,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1806417610, now seen corresponding path program 4 times [2024-06-21 17:05:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:28,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733348853] [2024-06-21 17:05:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:29,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:29,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733348853] [2024-06-21 17:05:29,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733348853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:29,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:29,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:29,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455459695] [2024-06-21 17:05:29,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:29,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:29,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:29,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:29,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:05:29,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 259 transitions, 2814 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:29,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:29,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:05:29,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:31,799 INFO L124 PetriNetUnfolderBase]: 11165/15506 cut-off events. [2024-06-21 17:05:31,799 INFO L125 PetriNetUnfolderBase]: For 1091641/1091665 co-relation queries the response was YES. [2024-06-21 17:05:31,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124387 conditions, 15506 events. 11165/15506 cut-off events. For 1091641/1091665 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 85127 event pairs, 4133 based on Foata normal form. 22/15511 useless extension candidates. Maximal degree in co-relation 124310. Up to 14250 conditions per place. [2024-06-21 17:05:31,982 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 175 selfloop transitions, 121 changer transitions 0/302 dead transitions. [2024-06-21 17:05:31,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 302 transitions, 4006 flow [2024-06-21 17:05:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 17:05:31,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2024-06-21 17:05:31,990 INFO L175 Difference]: Start difference. First operand has 181 places, 259 transitions, 2814 flow. Second operand 8 states and 188 transitions. [2024-06-21 17:05:31,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 302 transitions, 4006 flow [2024-06-21 17:05:32,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 302 transitions, 3831 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:32,835 INFO L231 Difference]: Finished difference. Result has 183 places, 269 transitions, 3081 flow [2024-06-21 17:05:32,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3081, PETRI_PLACES=183, PETRI_TRANSITIONS=269} [2024-06-21 17:05:32,836 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 129 predicate places. [2024-06-21 17:05:32,836 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 269 transitions, 3081 flow [2024-06-21 17:05:32,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:32,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:32,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:32,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:05:32,837 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:05:32,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1819304620, now seen corresponding path program 5 times [2024-06-21 17:05:32,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:32,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028699146] [2024-06-21 17:05:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:32,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat