./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix044.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/mix044.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/mix044.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix044.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:54:44,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:54:44,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:54:44,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:54:44,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:54:44,197 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:54:44,198 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:54:44,198 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:54:44,199 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:54:44,199 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:54:44,199 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:54:44,200 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:54:44,200 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:54:44,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:54:44,201 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:54:44,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:54:44,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:54:44,202 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:54:44,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:54:44,202 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:54:44,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:54:44,203 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:54:44,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:54:44,203 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:54:44,204 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:54:44,204 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:54:44,204 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:54:44,204 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:54:44,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:54:44,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:54:44,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:54:44,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:54:44,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:54:44,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:54:44,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:54:44,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:54:44,207 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:54:44,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:54:44,207 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:54:44,207 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:54:44,207 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:54:44,208 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:54:44,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:54:44,208 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:54:44,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:54:44,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:54:44,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:54:44,463 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:54:44,463 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:54:44,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix044.opt.i [2024-06-21 16:54:45,569 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:54:45,787 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:54:45,788 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix044.opt.i [2024-06-21 16:54:45,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4244bda2/e52e50806144481784ababb729375098/FLAGa39ced385 [2024-06-21 16:54:45,815 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4244bda2/e52e50806144481784ababb729375098 [2024-06-21 16:54:45,817 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:54:45,818 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:54:45,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix044.opt.yml/witness.yml [2024-06-21 16:54:45,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:54:45,962 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:54:45,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:54:45,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:54:45,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:54:45,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:54:45" (1/2) ... [2024-06-21 16:54:45,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60976eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:54:45, skipping insertion in model container [2024-06-21 16:54:45,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:54:45" (1/2) ... [2024-06-21 16:54:45,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1334b36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:54:45, skipping insertion in model container [2024-06-21 16:54:45,970 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:54:45" (2/2) ... [2024-06-21 16:54:45,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60976eb1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:45, skipping insertion in model container [2024-06-21 16:54:45,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:54:45" (2/2) ... [2024-06-21 16:54:45,972 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:54:46,059 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:54:46,061 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:54:46,061 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:54:46,061 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:54:46,062 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:54:46,062 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:54:46,063 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-21 16:54:46,102 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:54:46,498 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:54:46,508 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:54:46,643 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:54:46,687 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:54:46,688 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46 WrapperNode [2024-06-21 16:54:46,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:54:46,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:54:46,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:54:46,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:54:46,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,754 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 164 [2024-06-21 16:54:46,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:54:46,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:54:46,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:54:46,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:54:46,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,774 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,795 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:54:46,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,804 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,832 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:54:46,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:54:46,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:54:46,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:54:46,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (1/1) ... [2024-06-21 16:54:46,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:54:46,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:54:46,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:54:46,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:54:46,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:54:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:54:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:54:46,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:54:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:54:46,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:54:46,947 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:54:46,947 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:54:46,947 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:54:46,947 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:54:46,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:54:46,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:54:46,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:54:46,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:54:46,949 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:54:47,053 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:54:47,054 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:54:47,336 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:54:47,336 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:54:47,514 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:54:47,515 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:54:47,515 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:54:47 BoogieIcfgContainer [2024-06-21 16:54:47,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:54:47,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:54:47,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:54:47,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:54:47,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:54:45" (1/4) ... [2024-06-21 16:54:47,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9565a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:54:47, skipping insertion in model container [2024-06-21 16:54:47,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:54:45" (2/4) ... [2024-06-21 16:54:47,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9565a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:54:47, skipping insertion in model container [2024-06-21 16:54:47,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:54:46" (3/4) ... [2024-06-21 16:54:47,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9565a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:54:47, skipping insertion in model container [2024-06-21 16:54:47,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:54:47" (4/4) ... [2024-06-21 16:54:47,523 INFO L112 eAbstractionObserver]: Analyzing ICFG mix044.opt.i [2024-06-21 16:54:47,536 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:54:47,536 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:54:47,536 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:54:47,584 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:54:47,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:54:47,639 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 16:54:47,640 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:54:47,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:54:47,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:54:47,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 16:54:47,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:54:47,663 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;@599ea6ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:54:47,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:54:47,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:54:47,668 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 16:54:47,668 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:54:47,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:47,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:54:47,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:47,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash 385622724, now seen corresponding path program 1 times [2024-06-21 16:54:47,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:47,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105410659] [2024-06-21 16:54:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:47,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:48,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:48,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105410659] [2024-06-21 16:54:48,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105410659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:48,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:48,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:54:48,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985514420] [2024-06-21 16:54:48,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:48,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:54:48,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:54:48,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:54:48,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:54:48,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:48,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:48,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:54:48,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:49,707 INFO L124 PetriNetUnfolderBase]: 7503/10720 cut-off events. [2024-06-21 16:54:49,707 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-06-21 16:54:49,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21258 conditions, 10720 events. 7503/10720 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 61786 event pairs, 5685 based on Foata normal form. 1/10394 useless extension candidates. Maximal degree in co-relation 21245. Up to 10229 conditions per place. [2024-06-21 16:54:49,810 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 16:54:49,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-21 16:54:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:54:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:54:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-21 16:54:49,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-06-21 16:54:49,821 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 99 transitions. [2024-06-21 16:54:49,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-21 16:54:49,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:54:49,826 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 16:54:49,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 16:54:49,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 16:54:49,830 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 16:54:49,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:49,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:49,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:49,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:54:49,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:49,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:49,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1216270883, now seen corresponding path program 1 times [2024-06-21 16:54:49,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:49,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899991977] [2024-06-21 16:54:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:49,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:50,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:50,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899991977] [2024-06-21 16:54:50,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899991977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:50,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:50,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:54:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862248664] [2024-06-21 16:54:50,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:50,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:54:50,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:50,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:54:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:54:50,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:54:50,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:50,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:50,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:54:50,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:51,373 INFO L124 PetriNetUnfolderBase]: 8591/11980 cut-off events. [2024-06-21 16:54:51,373 INFO L125 PetriNetUnfolderBase]: For 2352/2352 co-relation queries the response was YES. [2024-06-21 16:54:51,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27198 conditions, 11980 events. 8591/11980 cut-off events. For 2352/2352 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67305 event pairs, 5794 based on Foata normal form. 4/11825 useless extension candidates. Maximal degree in co-relation 27186. Up to 11652 conditions per place. [2024-06-21 16:54:51,426 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 16:54:51,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 323 flow [2024-06-21 16:54:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:54:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:54:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-21 16:54:51,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943396226415094 [2024-06-21 16:54:51,428 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 126 transitions. [2024-06-21 16:54:51,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 323 flow [2024-06-21 16:54:51,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:54:51,431 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 16:54:51,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 16:54:51,432 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 16:54:51,432 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 16:54:51,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:51,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:51,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:51,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:54:51,433 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:51,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash -950307587, now seen corresponding path program 1 times [2024-06-21 16:54:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:51,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690356997] [2024-06-21 16:54:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:51,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:52,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:52,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690356997] [2024-06-21 16:54:52,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690356997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:52,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:52,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:54:52,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93090780] [2024-06-21 16:54:52,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:52,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:54:52,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:52,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:54:52,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:54:52,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:54:52,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:52,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:52,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:54:52,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:53,224 INFO L124 PetriNetUnfolderBase]: 8609/12019 cut-off events. [2024-06-21 16:54:53,225 INFO L125 PetriNetUnfolderBase]: For 6745/6745 co-relation queries the response was YES. [2024-06-21 16:54:53,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30490 conditions, 12019 events. 8609/12019 cut-off events. For 6745/6745 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 67490 event pairs, 4384 based on Foata normal form. 7/11877 useless extension candidates. Maximal degree in co-relation 30476. Up to 11573 conditions per place. [2024-06-21 16:54:53,296 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 71 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-21 16:54:53,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 539 flow [2024-06-21 16:54:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:54:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:54:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-21 16:54:53,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-06-21 16:54:53,301 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 165 transitions. [2024-06-21 16:54:53,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 539 flow [2024-06-21 16:54:53,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 520 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 16:54:53,306 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-21 16:54:53,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-21 16:54:53,307 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 16:54:53,307 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-21 16:54:53,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:53,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:53,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:53,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:54:53,308 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 16:54:53,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:53,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1853626274, now seen corresponding path program 1 times [2024-06-21 16:54:53,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:53,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501387540] [2024-06-21 16:54:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:53,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:54,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:54,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501387540] [2024-06-21 16:54:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501387540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:54,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:54,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:54:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571951481] [2024-06-21 16:54:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:54:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:54,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:54:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:54:54,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:54:54,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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 16:54:54,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:54,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:54:54,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:55,088 INFO L124 PetriNetUnfolderBase]: 8751/12241 cut-off events. [2024-06-21 16:54:55,089 INFO L125 PetriNetUnfolderBase]: For 16566/16585 co-relation queries the response was YES. [2024-06-21 16:54:55,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36546 conditions, 12241 events. 8751/12241 cut-off events. For 16566/16585 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69168 event pairs, 3463 based on Foata normal form. 48/12140 useless extension candidates. Maximal degree in co-relation 36529. Up to 11565 conditions per place. [2024-06-21 16:54:55,159 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 81 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-21 16:54:55,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 114 transitions, 694 flow [2024-06-21 16:54:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:54:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:54:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-21 16:54:55,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6069182389937107 [2024-06-21 16:54:55,160 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 193 transitions. [2024-06-21 16:54:55,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 114 transitions, 694 flow [2024-06-21 16:54:55,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 682 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 16:54:55,167 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 381 flow [2024-06-21 16:54:55,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-21 16:54:55,168 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-21 16:54:55,168 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 381 flow [2024-06-21 16:54:55,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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 16:54:55,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:55,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:55,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:54:55,169 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:55,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1409890327, now seen corresponding path program 1 times [2024-06-21 16:54:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:55,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411522431] [2024-06-21 16:54:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:55,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:55,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:55,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411522431] [2024-06-21 16:54:55,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411522431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:55,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:55,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:54:55,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255317621] [2024-06-21 16:54:55,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:55,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:54:55,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:54:55,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:54:55,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:54:55,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 381 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 16:54:55,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:55,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:54:55,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:57,271 INFO L124 PetriNetUnfolderBase]: 7644/10972 cut-off events. [2024-06-21 16:54:57,271 INFO L125 PetriNetUnfolderBase]: For 21015/21037 co-relation queries the response was YES. [2024-06-21 16:54:57,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35053 conditions, 10972 events. 7644/10972 cut-off events. For 21015/21037 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 63558 event pairs, 3619 based on Foata normal form. 3/10801 useless extension candidates. Maximal degree in co-relation 35032. Up to 10435 conditions per place. [2024-06-21 16:54:57,343 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 65 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-21 16:54:57,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 575 flow [2024-06-21 16:54:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:54:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:54:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 16:54:57,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-21 16:54:57,344 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 381 flow. Second operand 5 states and 131 transitions. [2024-06-21 16:54:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 575 flow [2024-06-21 16:54:57,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 514 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:54:57,351 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 351 flow [2024-06-21 16:54:57,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-21 16:54:57,352 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-21 16:54:57,352 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 351 flow [2024-06-21 16:54:57,353 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 16:54:57,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:57,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:57,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:54:57,353 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:57,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1268366612, now seen corresponding path program 1 times [2024-06-21 16:54:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448743837] [2024-06-21 16:54:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:57,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:57,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448743837] [2024-06-21 16:54:57,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448743837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:57,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:57,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:54:57,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162089644] [2024-06-21 16:54:57,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:57,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:54:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:54:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:54:58,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:54:58,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:58,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:58,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:54:58,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:59,343 INFO L124 PetriNetUnfolderBase]: 8755/12232 cut-off events. [2024-06-21 16:54:59,344 INFO L125 PetriNetUnfolderBase]: For 28174/28194 co-relation queries the response was YES. [2024-06-21 16:54:59,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39887 conditions, 12232 events. 8755/12232 cut-off events. For 28174/28194 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 68936 event pairs, 4208 based on Foata normal form. 24/12102 useless extension candidates. Maximal degree in co-relation 39864. Up to 11795 conditions per place. [2024-06-21 16:54:59,420 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 68 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-21 16:54:59,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 674 flow [2024-06-21 16:54:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:54:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:54:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 16:54:59,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062893081761006 [2024-06-21 16:54:59,422 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 351 flow. Second operand 6 states and 161 transitions. [2024-06-21 16:54:59,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 674 flow [2024-06-21 16:54:59,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 645 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:54:59,430 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 418 flow [2024-06-21 16:54:59,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-21 16:54:59,430 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-21 16:54:59,431 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 418 flow [2024-06-21 16:54:59,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:59,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:59,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:59,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:54:59,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:59,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1989958262, now seen corresponding path program 2 times [2024-06-21 16:54:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:59,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336030485] [2024-06-21 16:54:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:59,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:00,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:00,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336030485] [2024-06-21 16:55:00,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336030485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:00,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:00,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:55:00,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185802687] [2024-06-21 16:55:00,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:00,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:55:00,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:55:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:55:00,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:55:00,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:00,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:00,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:55:00,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:01,375 INFO L124 PetriNetUnfolderBase]: 8710/12159 cut-off events. [2024-06-21 16:55:01,375 INFO L125 PetriNetUnfolderBase]: For 33653/33681 co-relation queries the response was YES. [2024-06-21 16:55:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40733 conditions, 12159 events. 8710/12159 cut-off events. For 33653/33681 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 68353 event pairs, 4222 based on Foata normal form. 24/12023 useless extension candidates. Maximal degree in co-relation 40710. Up to 11726 conditions per place. [2024-06-21 16:55:01,431 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 61 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-21 16:55:01,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 654 flow [2024-06-21 16:55:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:55:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:55:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 16:55:01,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-21 16:55:01,433 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 418 flow. Second operand 6 states and 156 transitions. [2024-06-21 16:55:01,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 654 flow [2024-06-21 16:55:01,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 611 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:01,443 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 438 flow [2024-06-21 16:55:01,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-21 16:55:01,443 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-21 16:55:01,444 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 438 flow [2024-06-21 16:55:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:01,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:01,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:01,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:55:01,444 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:01,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash 842038786, now seen corresponding path program 1 times [2024-06-21 16:55:01,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:01,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346688387] [2024-06-21 16:55:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:01,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:02,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346688387] [2024-06-21 16:55:02,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346688387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:02,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:02,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:55:02,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256115538] [2024-06-21 16:55:02,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:02,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:55:02,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:55:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:55:02,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:55:02,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:02,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:02,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:55:02,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:03,840 INFO L124 PetriNetUnfolderBase]: 9694/13755 cut-off events. [2024-06-21 16:55:03,840 INFO L125 PetriNetUnfolderBase]: For 42623/42623 co-relation queries the response was YES. [2024-06-21 16:55:03,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45860 conditions, 13755 events. 9694/13755 cut-off events. For 42623/42623 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 78210 event pairs, 4624 based on Foata normal form. 6/13557 useless extension candidates. Maximal degree in co-relation 45836. Up to 13112 conditions per place. [2024-06-21 16:55:03,915 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 85 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-21 16:55:03,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 779 flow [2024-06-21 16:55:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 16:55:03,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-21 16:55:03,918 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 438 flow. Second operand 7 states and 175 transitions. [2024-06-21 16:55:03,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 779 flow [2024-06-21 16:55:03,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 688 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:55:03,943 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 459 flow [2024-06-21 16:55:03,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-21 16:55:03,944 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-21 16:55:03,944 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 459 flow [2024-06-21 16:55:03,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:03,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:03,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:03,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:55:03,945 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 16:55:03,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash -455683969, now seen corresponding path program 1 times [2024-06-21 16:55:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515906275] [2024-06-21 16:55:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:04,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:04,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515906275] [2024-06-21 16:55:04,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515906275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:04,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:04,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:55:04,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097247461] [2024-06-21 16:55:04,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:04,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:55:04,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:55:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:55:04,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:55:04,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 16:55:04,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:04,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:55:04,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:06,250 INFO L124 PetriNetUnfolderBase]: 9687/13846 cut-off events. [2024-06-21 16:55:06,250 INFO L125 PetriNetUnfolderBase]: For 52190/52190 co-relation queries the response was YES. [2024-06-21 16:55:06,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48936 conditions, 13846 events. 9687/13846 cut-off events. For 52190/52190 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 79388 event pairs, 4731 based on Foata normal form. 2/13694 useless extension candidates. Maximal degree in co-relation 48910. Up to 13154 conditions per place. [2024-06-21 16:55:06,362 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 78 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-06-21 16:55:06,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 703 flow [2024-06-21 16:55:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:55:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:55:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 16:55:06,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-21 16:55:06,363 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 459 flow. Second operand 5 states and 123 transitions. [2024-06-21 16:55:06,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 703 flow [2024-06-21 16:55:06,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 655 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:55:06,395 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 480 flow [2024-06-21 16:55:06,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-21 16:55:06,396 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-21 16:55:06,396 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 480 flow [2024-06-21 16:55:06,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 16:55:06,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:06,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:06,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:55:06,397 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 16:55:06,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:06,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1241299685, now seen corresponding path program 1 times [2024-06-21 16:55:06,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:06,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037571459] [2024-06-21 16:55:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:06,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:07,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:07,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037571459] [2024-06-21 16:55:07,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037571459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:07,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:07,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:55:07,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098442209] [2024-06-21 16:55:07,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:07,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:55:07,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:07,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:55:07,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:55:07,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:55:07,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 480 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:07,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:07,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:55:07,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:08,559 INFO L124 PetriNetUnfolderBase]: 9673/14096 cut-off events. [2024-06-21 16:55:08,559 INFO L125 PetriNetUnfolderBase]: For 66165/66165 co-relation queries the response was YES. [2024-06-21 16:55:08,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52180 conditions, 14096 events. 9673/14096 cut-off events. For 66165/66165 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 83759 event pairs, 4695 based on Foata normal form. 4/14080 useless extension candidates. Maximal degree in co-relation 52153. Up to 13118 conditions per place. [2024-06-21 16:55:08,659 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 83 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-06-21 16:55:08,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 760 flow [2024-06-21 16:55:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:55:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:55:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 16:55:08,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559748427672956 [2024-06-21 16:55:08,661 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 480 flow. Second operand 6 states and 145 transitions. [2024-06-21 16:55:08,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 760 flow [2024-06-21 16:55:08,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 721 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:08,686 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 524 flow [2024-06-21 16:55:08,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-21 16:55:08,688 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-21 16:55:08,689 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 524 flow [2024-06-21 16:55:08,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:08,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:08,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:08,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:55:08,690 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:08,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1328997081, now seen corresponding path program 1 times [2024-06-21 16:55:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:08,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749636008] [2024-06-21 16:55:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:08,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749636008] [2024-06-21 16:55:09,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749636008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:09,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:09,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:55:09,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936773537] [2024-06-21 16:55:09,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:09,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:55:09,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:09,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:55:09,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:55:09,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:55:09,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 524 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:09,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:09,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:55:09,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:11,057 INFO L124 PetriNetUnfolderBase]: 11104/15575 cut-off events. [2024-06-21 16:55:11,057 INFO L125 PetriNetUnfolderBase]: For 99278/99370 co-relation queries the response was YES. [2024-06-21 16:55:11,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62896 conditions, 15575 events. 11104/15575 cut-off events. For 99278/99370 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 89446 event pairs, 3947 based on Foata normal form. 54/15540 useless extension candidates. Maximal degree in co-relation 62868. Up to 14309 conditions per place. [2024-06-21 16:55:11,173 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 94 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-21 16:55:11,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 135 transitions, 1008 flow [2024-06-21 16:55:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 16:55:11,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-21 16:55:11,176 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 524 flow. Second operand 7 states and 189 transitions. [2024-06-21 16:55:11,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 135 transitions, 1008 flow [2024-06-21 16:55:11,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 135 transitions, 955 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 16:55:11,210 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 604 flow [2024-06-21 16:55:11,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-06-21 16:55:11,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-21 16:55:11,211 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 604 flow [2024-06-21 16:55:11,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:11,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:11,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:11,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:55:11,212 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 16:55:11,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1328936631, now seen corresponding path program 2 times [2024-06-21 16:55:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826201625] [2024-06-21 16:55:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826201625] [2024-06-21 16:55:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826201625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:12,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:12,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:55:12,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130398560] [2024-06-21 16:55:12,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:12,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:55:12,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:55:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:55:12,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:55:12,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:12,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:12,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:55:12,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:13,738 INFO L124 PetriNetUnfolderBase]: 11217/15754 cut-off events. [2024-06-21 16:55:13,739 INFO L125 PetriNetUnfolderBase]: For 117614/117706 co-relation queries the response was YES. [2024-06-21 16:55:13,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65971 conditions, 15754 events. 11217/15754 cut-off events. For 117614/117706 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 90652 event pairs, 4727 based on Foata normal form. 87/15742 useless extension candidates. Maximal degree in co-relation 65942. Up to 14935 conditions per place. [2024-06-21 16:55:13,882 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 91 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-21 16:55:13,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 131 transitions, 986 flow [2024-06-21 16:55:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 16:55:13,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49865229110512127 [2024-06-21 16:55:13,884 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 604 flow. Second operand 7 states and 185 transitions. [2024-06-21 16:55:13,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 131 transitions, 986 flow [2024-06-21 16:55:13,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 937 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:13,946 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 672 flow [2024-06-21 16:55:13,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=672, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-21 16:55:13,948 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-21 16:55:13,949 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 672 flow [2024-06-21 16:55:13,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:13,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:13,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:13,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:55:13,949 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 16:55:13,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:13,950 INFO L85 PathProgramCache]: Analyzing trace with hash 162975198, now seen corresponding path program 1 times [2024-06-21 16:55:13,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:13,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994934055] [2024-06-21 16:55:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:13,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:14,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:14,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994934055] [2024-06-21 16:55:14,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994934055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:14,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:14,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:55:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109212268] [2024-06-21 16:55:14,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:14,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:55:14,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:55:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:55:14,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:14,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 672 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 16:55:14,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:14,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:14,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:16,409 INFO L124 PetriNetUnfolderBase]: 11492/16052 cut-off events. [2024-06-21 16:55:16,409 INFO L125 PetriNetUnfolderBase]: For 132649/132655 co-relation queries the response was YES. [2024-06-21 16:55:16,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69351 conditions, 16052 events. 11492/16052 cut-off events. For 132649/132655 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 89629 event pairs, 5351 based on Foata normal form. 6/15964 useless extension candidates. Maximal degree in co-relation 69320. Up to 15573 conditions per place. [2024-06-21 16:55:16,507 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 99 selfloop transitions, 21 changer transitions 0/127 dead transitions. [2024-06-21 16:55:16,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1114 flow [2024-06-21 16:55:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:55:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:55:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 16:55:16,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-21 16:55:16,509 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 672 flow. Second operand 6 states and 149 transitions. [2024-06-21 16:55:16,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1114 flow [2024-06-21 16:55:16,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1033 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:55:16,590 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 738 flow [2024-06-21 16:55:16,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-21 16:55:16,591 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-21 16:55:16,592 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 738 flow [2024-06-21 16:55:16,592 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 16:55:16,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:16,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:16,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:55:16,592 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:16,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:16,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1120370957, now seen corresponding path program 1 times [2024-06-21 16:55:16,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:16,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395709044] [2024-06-21 16:55:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:16,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:17,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:17,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395709044] [2024-06-21 16:55:17,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395709044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:17,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:17,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:55:17,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705766570] [2024-06-21 16:55:17,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:55:17,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:55:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:55:17,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:17,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 738 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:17,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:17,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:17,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:19,361 INFO L124 PetriNetUnfolderBase]: 11550/16129 cut-off events. [2024-06-21 16:55:19,361 INFO L125 PetriNetUnfolderBase]: For 156314/156323 co-relation queries the response was YES. [2024-06-21 16:55:19,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72795 conditions, 16129 events. 11550/16129 cut-off events. For 156314/156323 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 89945 event pairs, 5055 based on Foata normal form. 8/16032 useless extension candidates. Maximal degree in co-relation 72763. Up to 15436 conditions per place. [2024-06-21 16:55:19,481 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 105 selfloop transitions, 44 changer transitions 0/156 dead transitions. [2024-06-21 16:55:19,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 156 transitions, 1269 flow [2024-06-21 16:55:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:55:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:55:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 16:55:19,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-21 16:55:19,483 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 738 flow. Second operand 8 states and 200 transitions. [2024-06-21 16:55:19,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 156 transitions, 1269 flow [2024-06-21 16:55:19,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1223 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 16:55:19,581 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 941 flow [2024-06-21 16:55:19,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-21 16:55:19,581 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-21 16:55:19,581 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 941 flow [2024-06-21 16:55:19,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:19,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:19,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:19,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:55:19,582 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:19,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1745473953, now seen corresponding path program 2 times [2024-06-21 16:55:19,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:19,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580156174] [2024-06-21 16:55:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:19,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:20,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580156174] [2024-06-21 16:55:20,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580156174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:20,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:20,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:55:20,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998822300] [2024-06-21 16:55:20,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:20,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:55:20,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:55:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:55:20,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:20,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 941 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:20,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:20,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:20,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:22,071 INFO L124 PetriNetUnfolderBase]: 11627/16264 cut-off events. [2024-06-21 16:55:22,071 INFO L125 PetriNetUnfolderBase]: For 177559/177568 co-relation queries the response was YES. [2024-06-21 16:55:22,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76234 conditions, 16264 events. 11627/16264 cut-off events. For 177559/177568 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 90995 event pairs, 4567 based on Foata normal form. 8/16167 useless extension candidates. Maximal degree in co-relation 76199. Up to 15266 conditions per place. [2024-06-21 16:55:22,198 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 109 selfloop transitions, 55 changer transitions 0/171 dead transitions. [2024-06-21 16:55:22,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 171 transitions, 1585 flow [2024-06-21 16:55:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:55:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:55:22,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 16:55:22,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-21 16:55:22,200 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 941 flow. Second operand 8 states and 207 transitions. [2024-06-21 16:55:22,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 171 transitions, 1585 flow [2024-06-21 16:55:22,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1495 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:22,312 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 1118 flow [2024-06-21 16:55:22,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-21 16:55:22,312 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-21 16:55:22,313 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 1118 flow [2024-06-21 16:55:22,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:22,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:22,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:22,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:55:22,313 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:22,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1040591871, now seen corresponding path program 3 times [2024-06-21 16:55:22,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:22,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804954190] [2024-06-21 16:55:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:22,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:23,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:23,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804954190] [2024-06-21 16:55:23,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804954190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:23,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:23,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:55:23,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714321773] [2024-06-21 16:55:23,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:23,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:55:23,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:23,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:55:23,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:55:23,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:23,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 1118 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:23,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:23,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:23,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:25,127 INFO L124 PetriNetUnfolderBase]: 11612/16171 cut-off events. [2024-06-21 16:55:25,128 INFO L125 PetriNetUnfolderBase]: For 199260/199269 co-relation queries the response was YES. [2024-06-21 16:55:25,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78358 conditions, 16171 events. 11612/16171 cut-off events. For 199260/199269 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 89700 event pairs, 5067 based on Foata normal form. 8/16134 useless extension candidates. Maximal degree in co-relation 78321. Up to 15534 conditions per place. [2024-06-21 16:55:25,254 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 114 selfloop transitions, 44 changer transitions 0/165 dead transitions. [2024-06-21 16:55:25,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 165 transitions, 1547 flow [2024-06-21 16:55:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:55:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:55:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 16:55:25,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-21 16:55:25,256 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 1118 flow. Second operand 8 states and 200 transitions. [2024-06-21 16:55:25,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 165 transitions, 1547 flow [2024-06-21 16:55:25,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 165 transitions, 1432 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 16:55:25,420 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1122 flow [2024-06-21 16:55:25,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1122, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-21 16:55:25,421 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-21 16:55:25,421 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1122 flow [2024-06-21 16:55:25,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:25,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:25,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:25,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:55:25,421 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:25,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash 174403038, now seen corresponding path program 2 times [2024-06-21 16:55:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:25,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433083893] [2024-06-21 16:55:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:26,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:26,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433083893] [2024-06-21 16:55:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433083893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:26,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:55:26,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187718400] [2024-06-21 16:55:26,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:26,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:55:26,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:26,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:55:26,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:55:26,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:26,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1122 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 16:55:26,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:26,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:26,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:28,003 INFO L124 PetriNetUnfolderBase]: 11605/16177 cut-off events. [2024-06-21 16:55:28,003 INFO L125 PetriNetUnfolderBase]: For 215896/215911 co-relation queries the response was YES. [2024-06-21 16:55:28,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79500 conditions, 16177 events. 11605/16177 cut-off events. For 215896/215911 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 89909 event pairs, 5043 based on Foata normal form. 12/16153 useless extension candidates. Maximal degree in co-relation 79460. Up to 15746 conditions per place. [2024-06-21 16:55:28,120 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 115 selfloop transitions, 21 changer transitions 0/143 dead transitions. [2024-06-21 16:55:28,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 1440 flow [2024-06-21 16:55:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:55:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:55:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 16:55:28,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-21 16:55:28,122 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1122 flow. Second operand 6 states and 141 transitions. [2024-06-21 16:55:28,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 1440 flow [2024-06-21 16:55:28,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 143 transitions, 1312 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:55:28,263 INFO L231 Difference]: Finished difference. Result has 107 places, 125 transitions, 1045 flow [2024-06-21 16:55:28,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1045, PETRI_PLACES=107, PETRI_TRANSITIONS=125} [2024-06-21 16:55:28,263 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-21 16:55:28,263 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 125 transitions, 1045 flow [2024-06-21 16:55:28,264 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 16:55:28,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:28,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:28,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:55:28,264 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 16:55:28,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash 691240800, now seen corresponding path program 1 times [2024-06-21 16:55:28,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:28,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769561821] [2024-06-21 16:55:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:28,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:28,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:28,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769561821] [2024-06-21 16:55:28,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769561821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:28,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:28,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:55:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453489519] [2024-06-21 16:55:28,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:28,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:55:28,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:28,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:55:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:55:29,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:55:29,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 125 transitions, 1045 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:29,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:29,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:55:29,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:30,567 INFO L124 PetriNetUnfolderBase]: 10226/14590 cut-off events. [2024-06-21 16:55:30,568 INFO L125 PetriNetUnfolderBase]: For 202594/202600 co-relation queries the response was YES. [2024-06-21 16:55:30,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71805 conditions, 14590 events. 10226/14590 cut-off events. For 202594/202600 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 84105 event pairs, 4290 based on Foata normal form. 6/14537 useless extension candidates. Maximal degree in co-relation 71764. Up to 13926 conditions per place. [2024-06-21 16:55:30,700 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 127 selfloop transitions, 21 changer transitions 0/156 dead transitions. [2024-06-21 16:55:30,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 156 transitions, 1555 flow [2024-06-21 16:55:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:55:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:55:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 16:55:30,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-21 16:55:30,702 INFO L175 Difference]: Start difference. First operand has 107 places, 125 transitions, 1045 flow. Second operand 6 states and 151 transitions. [2024-06-21 16:55:30,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 156 transitions, 1555 flow [2024-06-21 16:55:30,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 156 transitions, 1496 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:55:30,844 INFO L231 Difference]: Finished difference. Result has 108 places, 133 transitions, 1133 flow [2024-06-21 16:55:30,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1133, PETRI_PLACES=108, PETRI_TRANSITIONS=133} [2024-06-21 16:55:30,845 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-21 16:55:30,845 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 133 transitions, 1133 flow [2024-06-21 16:55:30,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:30,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:30,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:30,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:55:30,846 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 16:55:30,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:30,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1347876480, now seen corresponding path program 2 times [2024-06-21 16:55:30,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:30,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592301427] [2024-06-21 16:55:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:30,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:31,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592301427] [2024-06-21 16:55:31,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592301427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:31,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:31,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:55:31,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871607293] [2024-06-21 16:55:31,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:31,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:55:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:55:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:55:31,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:55:31,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 133 transitions, 1133 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:31,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:31,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:55:31,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:33,179 INFO L124 PetriNetUnfolderBase]: 10219/14582 cut-off events. [2024-06-21 16:55:33,179 INFO L125 PetriNetUnfolderBase]: For 227487/227493 co-relation queries the response was YES. [2024-06-21 16:55:33,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74909 conditions, 14582 events. 10219/14582 cut-off events. For 227487/227493 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 84166 event pairs, 4293 based on Foata normal form. 6/14528 useless extension candidates. Maximal degree in co-relation 74867. Up to 13919 conditions per place. [2024-06-21 16:55:33,322 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 122 selfloop transitions, 21 changer transitions 0/151 dead transitions. [2024-06-21 16:55:33,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 151 transitions, 1465 flow [2024-06-21 16:55:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:55:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:55:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 16:55:33,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-21 16:55:33,329 INFO L175 Difference]: Start difference. First operand has 108 places, 133 transitions, 1133 flow. Second operand 6 states and 146 transitions. [2024-06-21 16:55:33,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 151 transitions, 1465 flow [2024-06-21 16:55:33,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 1362 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:33,488 INFO L231 Difference]: Finished difference. Result has 111 places, 133 transitions, 1081 flow [2024-06-21 16:55:33,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1081, PETRI_PLACES=111, PETRI_TRANSITIONS=133} [2024-06-21 16:55:33,489 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-21 16:55:33,489 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 133 transitions, 1081 flow [2024-06-21 16:55:33,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:33,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:33,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:33,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:55:33,490 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 16:55:33,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 756966406, now seen corresponding path program 1 times [2024-06-21 16:55:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:33,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502509117] [2024-06-21 16:55:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:34,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:34,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502509117] [2024-06-21 16:55:34,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502509117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:34,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:34,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:55:34,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591608282] [2024-06-21 16:55:34,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:55:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:55:34,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:55:34,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:34,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 133 transitions, 1081 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 16:55:34,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:34,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:34,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:36,000 INFO L124 PetriNetUnfolderBase]: 11669/16268 cut-off events. [2024-06-21 16:55:36,000 INFO L125 PetriNetUnfolderBase]: For 282008/282020 co-relation queries the response was YES. [2024-06-21 16:55:36,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84660 conditions, 16268 events. 11669/16268 cut-off events. For 282008/282020 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 90473 event pairs, 4988 based on Foata normal form. 12/16231 useless extension candidates. Maximal degree in co-relation 84617. Up to 15602 conditions per place. [2024-06-21 16:55:36,111 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 52 changer transitions 0/189 dead transitions. [2024-06-21 16:55:36,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 189 transitions, 1886 flow [2024-06-21 16:55:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:55:36,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-21 16:55:36,113 INFO L175 Difference]: Start difference. First operand has 111 places, 133 transitions, 1081 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:55:36,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 189 transitions, 1886 flow [2024-06-21 16:55:36,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 189 transitions, 1831 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:55:36,253 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1394 flow [2024-06-21 16:55:36,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1394, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-06-21 16:55:36,253 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-21 16:55:36,253 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1394 flow [2024-06-21 16:55:36,254 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 16:55:36,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:36,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:36,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:55:36,254 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:36,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1397219829, now seen corresponding path program 1 times [2024-06-21 16:55:36,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:36,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389266634] [2024-06-21 16:55:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:36,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:37,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389266634] [2024-06-21 16:55:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389266634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:37,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:37,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:55:37,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151640043] [2024-06-21 16:55:37,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:37,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:55:37,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:55:37,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:55:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:37,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1394 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:37,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:37,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:37,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:39,334 INFO L124 PetriNetUnfolderBase]: 11911/16655 cut-off events. [2024-06-21 16:55:39,334 INFO L125 PetriNetUnfolderBase]: For 325874/325877 co-relation queries the response was YES. [2024-06-21 16:55:39,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91781 conditions, 16655 events. 11911/16655 cut-off events. For 325874/325877 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 93430 event pairs, 4993 based on Foata normal form. 18/16628 useless extension candidates. Maximal degree in co-relation 91735. Up to 15500 conditions per place. [2024-06-21 16:55:39,519 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 148 selfloop transitions, 53 changer transitions 0/208 dead transitions. [2024-06-21 16:55:39,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 208 transitions, 2033 flow [2024-06-21 16:55:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:55:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:55:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:55:39,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-21 16:55:39,521 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1394 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:55:39,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 208 transitions, 2033 flow [2024-06-21 16:55:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 208 transitions, 1933 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:39,806 INFO L231 Difference]: Finished difference. Result has 122 places, 160 transitions, 1563 flow [2024-06-21 16:55:39,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=122, PETRI_TRANSITIONS=160} [2024-06-21 16:55:39,807 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-21 16:55:39,807 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 160 transitions, 1563 flow [2024-06-21 16:55:39,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:39,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:39,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:39,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:55:39,808 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:39,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1537823138, now seen corresponding path program 2 times [2024-06-21 16:55:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:39,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125597433] [2024-06-21 16:55:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:39,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:40,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:40,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125597433] [2024-06-21 16:55:40,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125597433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:40,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:40,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:55:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659510883] [2024-06-21 16:55:40,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:40,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:55:40,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:40,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:55:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:55:40,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:40,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 160 transitions, 1563 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 16:55:40,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:40,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:40,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:42,747 INFO L124 PetriNetUnfolderBase]: 11994/16775 cut-off events. [2024-06-21 16:55:42,747 INFO L125 PetriNetUnfolderBase]: For 348257/348269 co-relation queries the response was YES. [2024-06-21 16:55:42,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93679 conditions, 16775 events. 11994/16775 cut-off events. For 348257/348269 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 94258 event pairs, 5032 based on Foata normal form. 12/16738 useless extension candidates. Maximal degree in co-relation 93630. Up to 16041 conditions per place. [2024-06-21 16:55:42,890 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 137 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-21 16:55:42,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 202 transitions, 2327 flow [2024-06-21 16:55:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:55:42,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-21 16:55:42,893 INFO L175 Difference]: Start difference. First operand has 122 places, 160 transitions, 1563 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:55:42,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 202 transitions, 2327 flow [2024-06-21 16:55:43,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 202 transitions, 2237 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:43,195 INFO L231 Difference]: Finished difference. Result has 127 places, 170 transitions, 1747 flow [2024-06-21 16:55:43,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1747, PETRI_PLACES=127, PETRI_TRANSITIONS=170} [2024-06-21 16:55:43,196 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-21 16:55:43,196 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 170 transitions, 1747 flow [2024-06-21 16:55:43,196 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 16:55:43,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:43,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:55:43,197 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:43,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:43,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1537822766, now seen corresponding path program 1 times [2024-06-21 16:55:43,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:43,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817464698] [2024-06-21 16:55:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:43,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:43,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:43,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817464698] [2024-06-21 16:55:43,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817464698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:43,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:43,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:55:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299372089] [2024-06-21 16:55:43,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:43,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:55:43,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:43,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:55:43,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:55:43,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:43,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 170 transitions, 1747 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 16:55:43,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:43,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:43,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:45,977 INFO L124 PetriNetUnfolderBase]: 12026/16818 cut-off events. [2024-06-21 16:55:45,978 INFO L125 PetriNetUnfolderBase]: For 372679/372685 co-relation queries the response was YES. [2024-06-21 16:55:46,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94995 conditions, 16818 events. 12026/16818 cut-off events. For 372679/372685 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 94329 event pairs, 4973 based on Foata normal form. 5/16779 useless extension candidates. Maximal degree in co-relation 94944. Up to 16273 conditions per place. [2024-06-21 16:55:46,110 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 173 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-21 16:55:46,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 211 transitions, 2449 flow [2024-06-21 16:55:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 16:55:46,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46900269541778977 [2024-06-21 16:55:46,112 INFO L175 Difference]: Start difference. First operand has 127 places, 170 transitions, 1747 flow. Second operand 7 states and 174 transitions. [2024-06-21 16:55:46,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 211 transitions, 2449 flow [2024-06-21 16:55:46,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 2339 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:46,387 INFO L231 Difference]: Finished difference. Result has 131 places, 178 transitions, 1840 flow [2024-06-21 16:55:46,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1840, PETRI_PLACES=131, PETRI_TRANSITIONS=178} [2024-06-21 16:55:46,388 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-21 16:55:46,388 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 178 transitions, 1840 flow [2024-06-21 16:55:46,388 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 16:55:46,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:46,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:46,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:55:46,389 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 16:55:46,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:46,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1734077381, now seen corresponding path program 2 times [2024-06-21 16:55:46,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:46,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994580809] [2024-06-21 16:55:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:46,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:47,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994580809] [2024-06-21 16:55:47,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994580809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:47,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:47,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:55:47,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494813837] [2024-06-21 16:55:47,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:47,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:55:47,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:55:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:55:47,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:47,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 178 transitions, 1840 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:47,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:47,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:47,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:49,265 INFO L124 PetriNetUnfolderBase]: 11987/16759 cut-off events. [2024-06-21 16:55:49,265 INFO L125 PetriNetUnfolderBase]: For 411023/411026 co-relation queries the response was YES. [2024-06-21 16:55:49,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97567 conditions, 16759 events. 11987/16759 cut-off events. For 411023/411026 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 93680 event pairs, 3627 based on Foata normal form. 18/16730 useless extension candidates. Maximal degree in co-relation 97515. Up to 14914 conditions per place. [2024-06-21 16:55:49,417 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 152 selfloop transitions, 61 changer transitions 0/220 dead transitions. [2024-06-21 16:55:49,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 220 transitions, 2384 flow [2024-06-21 16:55:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:55:49,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-21 16:55:49,419 INFO L175 Difference]: Start difference. First operand has 131 places, 178 transitions, 1840 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:55:49,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 220 transitions, 2384 flow [2024-06-21 16:55:49,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 220 transitions, 2294 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 16:55:49,750 INFO L231 Difference]: Finished difference. Result has 135 places, 178 transitions, 1885 flow [2024-06-21 16:55:49,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1885, PETRI_PLACES=135, PETRI_TRANSITIONS=178} [2024-06-21 16:55:49,750 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 16:55:49,750 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 178 transitions, 1885 flow [2024-06-21 16:55:49,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:49,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:49,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:49,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:55:49,759 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:55:49,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2076333439, now seen corresponding path program 3 times [2024-06-21 16:55:49,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:49,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805482289] [2024-06-21 16:55:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:50,482 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 16:55:50,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:50,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805482289] [2024-06-21 16:55:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805482289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:50,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:50,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:55:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413837542] [2024-06-21 16:55:50,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:50,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:55:50,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:55:50,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:55:50,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:50,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 178 transitions, 1885 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:50,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:50,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:50,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:52,310 INFO L124 PetriNetUnfolderBase]: 11948/16695 cut-off events. [2024-06-21 16:55:52,311 INFO L125 PetriNetUnfolderBase]: For 435679/435688 co-relation queries the response was YES. [2024-06-21 16:55:52,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98511 conditions, 16695 events. 11948/16695 cut-off events. For 435679/435688 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 93315 event pairs, 3025 based on Foata normal form. 19/16650 useless extension candidates. Maximal degree in co-relation 98457. Up to 14675 conditions per place. [2024-06-21 16:55:52,471 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 146 selfloop transitions, 63 changer transitions 0/216 dead transitions. [2024-06-21 16:55:52,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 216 transitions, 2419 flow [2024-06-21 16:55:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:55:52,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-21 16:55:52,478 INFO L175 Difference]: Start difference. First operand has 135 places, 178 transitions, 1885 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:55:52,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 216 transitions, 2419 flow [2024-06-21 16:55:52,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 216 transitions, 2257 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:55:52,734 INFO L231 Difference]: Finished difference. Result has 135 places, 179 transitions, 1872 flow [2024-06-21 16:55:52,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1872, PETRI_PLACES=135, PETRI_TRANSITIONS=179} [2024-06-21 16:55:52,735 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 16:55:52,735 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 179 transitions, 1872 flow [2024-06-21 16:55:52,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:55:52,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:52,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:52,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:55:52,737 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 16:55:52,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1111527976, now seen corresponding path program 3 times [2024-06-21 16:55:52,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:52,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664269089] [2024-06-21 16:55:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:52,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:53,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:53,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664269089] [2024-06-21 16:55:53,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664269089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:53,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:53,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:55:53,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077558482] [2024-06-21 16:55:53,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:53,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:55:53,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:55:53,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:55:53,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:53,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 1872 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 16:55:53,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:53,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:53,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:55,693 INFO L124 PetriNetUnfolderBase]: 11939/16762 cut-off events. [2024-06-21 16:55:55,693 INFO L125 PetriNetUnfolderBase]: For 437553/437580 co-relation queries the response was YES. [2024-06-21 16:55:55,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99076 conditions, 16762 events. 11939/16762 cut-off events. For 437553/437580 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 94635 event pairs, 5000 based on Foata normal form. 19/16661 useless extension candidates. Maximal degree in co-relation 99021. Up to 15964 conditions per place. [2024-06-21 16:55:55,849 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 140 selfloop transitions, 58 changer transitions 0/205 dead transitions. [2024-06-21 16:55:55,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 205 transitions, 2524 flow [2024-06-21 16:55:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 16:55:55,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-21 16:55:55,851 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 1872 flow. Second operand 7 states and 171 transitions. [2024-06-21 16:55:55,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 205 transitions, 2524 flow [2024-06-21 16:55:56,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 205 transitions, 2341 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:55:56,109 INFO L231 Difference]: Finished difference. Result has 137 places, 179 transitions, 1816 flow [2024-06-21 16:55:56,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1816, PETRI_PLACES=137, PETRI_TRANSITIONS=179} [2024-06-21 16:55:56,110 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-21 16:55:56,110 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 179 transitions, 1816 flow [2024-06-21 16:55:56,110 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 16:55:56,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:55:56,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:55:56,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:55:56,111 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 16:55:56,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:55:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1111528348, now seen corresponding path program 2 times [2024-06-21 16:55:56,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:55:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385963859] [2024-06-21 16:55:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:55:56,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:55:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:55:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:55:56,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:55:56,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385963859] [2024-06-21 16:55:56,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385963859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:55:56,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:55:56,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:55:56,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223979980] [2024-06-21 16:55:56,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:55:56,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:55:56,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:55:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:55:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:55:56,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:55:56,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 179 transitions, 1816 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 16:55:56,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:55:56,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:55:56,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:55:59,486 INFO L124 PetriNetUnfolderBase]: 11971/16811 cut-off events. [2024-06-21 16:55:59,486 INFO L125 PetriNetUnfolderBase]: For 462120/462135 co-relation queries the response was YES. [2024-06-21 16:55:59,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99840 conditions, 16811 events. 11971/16811 cut-off events. For 462120/462135 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 94839 event pairs, 4923 based on Foata normal form. 14/16719 useless extension candidates. Maximal degree in co-relation 99784. Up to 16177 conditions per place. [2024-06-21 16:55:59,628 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 168 selfloop transitions, 35 changer transitions 0/210 dead transitions. [2024-06-21 16:55:59,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 210 transitions, 2456 flow [2024-06-21 16:55:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:55:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:55:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 16:55:59,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-21 16:55:59,630 INFO L175 Difference]: Start difference. First operand has 137 places, 179 transitions, 1816 flow. Second operand 7 states and 167 transitions. [2024-06-21 16:55:59,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 210 transitions, 2456 flow [2024-06-21 16:56:00,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 210 transitions, 2299 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:56:00,107 INFO L231 Difference]: Finished difference. Result has 138 places, 183 transitions, 1806 flow [2024-06-21 16:56:00,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1806, PETRI_PLACES=138, PETRI_TRANSITIONS=183} [2024-06-21 16:56:00,107 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-21 16:56:00,107 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 183 transitions, 1806 flow [2024-06-21 16:56:00,108 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 16:56:00,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:00,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:00,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:56:00,108 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 16:56:00,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1111944058, now seen corresponding path program 3 times [2024-06-21 16:56:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673457196] [2024-06-21 16:56:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:00,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:00,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673457196] [2024-06-21 16:56:00,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673457196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:00,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:00,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:00,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241950694] [2024-06-21 16:56:00,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:00,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:00,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 16:56:00,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 183 transitions, 1806 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 16:56:00,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:00,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 16:56:00,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:03,451 INFO L124 PetriNetUnfolderBase]: 11957/16793 cut-off events. [2024-06-21 16:56:03,451 INFO L125 PetriNetUnfolderBase]: For 489490/489505 co-relation queries the response was YES. [2024-06-21 16:56:03,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100227 conditions, 16793 events. 11957/16793 cut-off events. For 489490/489505 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 94830 event pairs, 4923 based on Foata normal form. 14/16701 useless extension candidates. Maximal degree in co-relation 100172. Up to 16165 conditions per place. [2024-06-21 16:56:03,575 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 164 selfloop transitions, 36 changer transitions 0/207 dead transitions. [2024-06-21 16:56:03,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 207 transitions, 2266 flow [2024-06-21 16:56:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 16:56:03,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393530997304582 [2024-06-21 16:56:03,576 INFO L175 Difference]: Start difference. First operand has 138 places, 183 transitions, 1806 flow. Second operand 7 states and 163 transitions. [2024-06-21 16:56:03,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 207 transitions, 2266 flow [2024-06-21 16:56:03,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 207 transitions, 2101 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:03,841 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 1722 flow [2024-06-21 16:56:03,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1722, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-21 16:56:03,842 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-21 16:56:03,842 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 1722 flow [2024-06-21 16:56:03,842 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 16:56:03,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:03,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:03,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:56:03,842 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:56:03,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:03,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1365873950, now seen corresponding path program 1 times [2024-06-21 16:56:03,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:03,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106283347] [2024-06-21 16:56:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:03,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:04,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:04,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106283347] [2024-06-21 16:56:04,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106283347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:04,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:04,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:04,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943115044] [2024-06-21 16:56:04,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:04,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:04,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:04,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:56:04,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 1722 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:04,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:04,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:56:04,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:06,814 INFO L124 PetriNetUnfolderBase]: 10578/15266 cut-off events. [2024-06-21 16:56:06,814 INFO L125 PetriNetUnfolderBase]: For 447813/447813 co-relation queries the response was YES. [2024-06-21 16:56:06,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90268 conditions, 15266 events. 10578/15266 cut-off events. For 447813/447813 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 89635 event pairs, 4216 based on Foata normal form. 2/15122 useless extension candidates. Maximal degree in co-relation 90212. Up to 14427 conditions per place. [2024-06-21 16:56:06,945 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 189 selfloop transitions, 18 changer transitions 0/215 dead transitions. [2024-06-21 16:56:06,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 215 transitions, 2266 flow [2024-06-21 16:56:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 16:56:06,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-21 16:56:06,946 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 1722 flow. Second operand 7 states and 170 transitions. [2024-06-21 16:56:06,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 215 transitions, 2266 flow [2024-06-21 16:56:07,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 215 transitions, 2177 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:56:07,406 INFO L231 Difference]: Finished difference. Result has 141 places, 187 transitions, 1744 flow [2024-06-21 16:56:07,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=141, PETRI_TRANSITIONS=187} [2024-06-21 16:56:07,407 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-21 16:56:07,407 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 187 transitions, 1744 flow [2024-06-21 16:56:07,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:07,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:07,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:07,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:56:07,407 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:56:07,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash 934581154, now seen corresponding path program 2 times [2024-06-21 16:56:07,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:07,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912756493] [2024-06-21 16:56:07,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:07,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:08,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:08,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912756493] [2024-06-21 16:56:08,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912756493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:08,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:08,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:08,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107444319] [2024-06-21 16:56:08,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:08,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:08,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:08,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:56:08,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 187 transitions, 1744 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:08,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:08,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:56:08,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:10,385 INFO L124 PetriNetUnfolderBase]: 10594/15221 cut-off events. [2024-06-21 16:56:10,386 INFO L125 PetriNetUnfolderBase]: For 484712/484715 co-relation queries the response was YES. [2024-06-21 16:56:10,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93340 conditions, 15221 events. 10594/15221 cut-off events. For 484712/484715 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 89267 event pairs, 4214 based on Foata normal form. 4/15114 useless extension candidates. Maximal degree in co-relation 93283. Up to 14401 conditions per place. [2024-06-21 16:56:10,511 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 179 selfloop transitions, 35 changer transitions 0/222 dead transitions. [2024-06-21 16:56:10,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 222 transitions, 2484 flow [2024-06-21 16:56:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 16:56:10,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-21 16:56:10,513 INFO L175 Difference]: Start difference. First operand has 141 places, 187 transitions, 1744 flow. Second operand 7 states and 173 transitions. [2024-06-21 16:56:10,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 222 transitions, 2484 flow [2024-06-21 16:56:10,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 222 transitions, 2403 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:10,945 INFO L231 Difference]: Finished difference. Result has 143 places, 195 transitions, 1882 flow [2024-06-21 16:56:10,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1882, PETRI_PLACES=143, PETRI_TRANSITIONS=195} [2024-06-21 16:56:10,946 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-21 16:56:10,946 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 195 transitions, 1882 flow [2024-06-21 16:56:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:10,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:10,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:56:10,946 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:56:10,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1365869114, now seen corresponding path program 1 times [2024-06-21 16:56:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955819217] [2024-06-21 16:56:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:11,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:11,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955819217] [2024-06-21 16:56:11,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955819217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:11,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:11,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:11,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650971578] [2024-06-21 16:56:11,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:11,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:11,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:11,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:11,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:11,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:56:11,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 195 transitions, 1882 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:11,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:11,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:56:11,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:14,152 INFO L124 PetriNetUnfolderBase]: 10626/15247 cut-off events. [2024-06-21 16:56:14,152 INFO L125 PetriNetUnfolderBase]: For 527985/527988 co-relation queries the response was YES. [2024-06-21 16:56:14,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96719 conditions, 15247 events. 10626/15247 cut-off events. For 527985/527988 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 89008 event pairs, 4190 based on Foata normal form. 4/15133 useless extension candidates. Maximal degree in co-relation 96661. Up to 14417 conditions per place. [2024-06-21 16:56:14,282 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 194 selfloop transitions, 31 changer transitions 0/233 dead transitions. [2024-06-21 16:56:14,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 233 transitions, 2650 flow [2024-06-21 16:56:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:56:14,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-21 16:56:14,283 INFO L175 Difference]: Start difference. First operand has 143 places, 195 transitions, 1882 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:56:14,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 233 transitions, 2650 flow [2024-06-21 16:56:14,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 233 transitions, 2560 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 16:56:14,587 INFO L231 Difference]: Finished difference. Result has 147 places, 203 transitions, 1999 flow [2024-06-21 16:56:14,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1999, PETRI_PLACES=147, PETRI_TRANSITIONS=203} [2024-06-21 16:56:14,588 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-21 16:56:14,588 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 203 transitions, 1999 flow [2024-06-21 16:56:14,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:14,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:14,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:14,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:56:14,588 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:56:14,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:14,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1134220064, now seen corresponding path program 2 times [2024-06-21 16:56:14,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:14,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531995895] [2024-06-21 16:56:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:14,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531995895] [2024-06-21 16:56:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531995895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:15,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492623315] [2024-06-21 16:56:15,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:15,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:15,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:56:15,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 203 transitions, 1999 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:15,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:15,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:56:15,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:17,820 INFO L124 PetriNetUnfolderBase]: 10658/15302 cut-off events. [2024-06-21 16:56:17,820 INFO L125 PetriNetUnfolderBase]: For 562771/562777 co-relation queries the response was YES. [2024-06-21 16:56:17,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99572 conditions, 15302 events. 10658/15302 cut-off events. For 562771/562777 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 89441 event pairs, 4161 based on Foata normal form. 8/15196 useless extension candidates. Maximal degree in co-relation 99512. Up to 14446 conditions per place. [2024-06-21 16:56:17,943 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 191 selfloop transitions, 35 changer transitions 0/234 dead transitions. [2024-06-21 16:56:17,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 234 transitions, 2707 flow [2024-06-21 16:56:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 16:56:17,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-21 16:56:17,945 INFO L175 Difference]: Start difference. First operand has 147 places, 203 transitions, 1999 flow. Second operand 7 states and 173 transitions. [2024-06-21 16:56:17,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 234 transitions, 2707 flow [2024-06-21 16:56:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 234 transitions, 2623 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 16:56:18,285 INFO L231 Difference]: Finished difference. Result has 151 places, 207 transitions, 2064 flow [2024-06-21 16:56:18,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2064, PETRI_PLACES=151, PETRI_TRANSITIONS=207} [2024-06-21 16:56:18,285 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-21 16:56:18,285 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 207 transitions, 2064 flow [2024-06-21 16:56:18,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:18,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:18,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:18,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:56:18,286 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 16:56:18,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:18,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1111712674, now seen corresponding path program 3 times [2024-06-21 16:56:18,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:18,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030140054] [2024-06-21 16:56:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:18,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:19,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:19,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030140054] [2024-06-21 16:56:19,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030140054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:19,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:19,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:19,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717235504] [2024-06-21 16:56:19,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:19,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:19,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:19,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:19,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:56:19,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 207 transitions, 2064 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:19,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:19,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:56:19,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:21,559 INFO L124 PetriNetUnfolderBase]: 10651/15290 cut-off events. [2024-06-21 16:56:21,559 INFO L125 PetriNetUnfolderBase]: For 590804/590807 co-relation queries the response was YES. [2024-06-21 16:56:21,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100471 conditions, 15290 events. 10651/15290 cut-off events. For 590804/590807 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 89327 event pairs, 4210 based on Foata normal form. 2/15176 useless extension candidates. Maximal degree in co-relation 100409. Up to 14478 conditions per place. [2024-06-21 16:56:21,716 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 186 selfloop transitions, 35 changer transitions 0/229 dead transitions. [2024-06-21 16:56:21,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 229 transitions, 2562 flow [2024-06-21 16:56:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 16:56:21,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-21 16:56:21,718 INFO L175 Difference]: Start difference. First operand has 151 places, 207 transitions, 2064 flow. Second operand 7 states and 168 transitions. [2024-06-21 16:56:21,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 229 transitions, 2562 flow [2024-06-21 16:56:22,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 229 transitions, 2403 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 16:56:22,083 INFO L231 Difference]: Finished difference. Result has 153 places, 207 transitions, 1984 flow [2024-06-21 16:56:22,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1984, PETRI_PLACES=153, PETRI_TRANSITIONS=207} [2024-06-21 16:56:22,084 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-21 16:56:22,084 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 207 transitions, 1984 flow [2024-06-21 16:56:22,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:22,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:56:22,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:56:22,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:56:22,085 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:56:22,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:56:22,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1111950010, now seen corresponding path program 3 times [2024-06-21 16:56:22,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:56:22,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854849148] [2024-06-21 16:56:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:56:22,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:56:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:56:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:56:22,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:56:22,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854849148] [2024-06-21 16:56:22,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854849148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:56:22,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:56:22,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:56:22,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579739179] [2024-06-21 16:56:22,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:56:22,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:56:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:56:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:56:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:56:23,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 16:56:23,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 207 transitions, 1984 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:56:23,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:56:23,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 16:56:23,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:56:25,181 INFO L124 PetriNetUnfolderBase]: 10637/15275 cut-off events. [2024-06-21 16:56:25,181 INFO L125 PetriNetUnfolderBase]: For 618990/618996 co-relation queries the response was YES. [2024-06-21 16:56:25,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100959 conditions, 15275 events. 10637/15275 cut-off events. For 618990/618996 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 89332 event pairs, 4161 based on Foata normal form. 8/15169 useless extension candidates. Maximal degree in co-relation 100896. Up to 14425 conditions per place. [2024-06-21 16:56:25,485 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 187 selfloop transitions, 36 changer transitions 0/231 dead transitions. [2024-06-21 16:56:25,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 231 transitions, 2490 flow [2024-06-21 16:56:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:56:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:56:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 16:56:25,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-21 16:56:25,486 INFO L175 Difference]: Start difference. First operand has 153 places, 207 transitions, 1984 flow. Second operand 7 states and 169 transitions. [2024-06-21 16:56:25,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 231 transitions, 2490 flow