./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033_tso.oepc.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/mutex-meet-nonrel/mix033_tso.oepc.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/mix033_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix033_tso.oepc.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 20:57:36,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:57:36,968 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:57:36,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:57:36,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:57:36,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:57:36,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:57:36,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:57:36,986 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:57:36,987 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:57:36,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:57:36,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:57:36,988 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:57:36,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:57:36,988 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:57:36,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:57:36,989 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:57:36,989 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:57:36,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:57:36,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:57:36,990 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:57:36,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:57:36,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:57:36,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:57:36,991 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:57:36,991 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:57:36,992 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:57:36,992 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:57:36,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:57:36,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:57:36,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:57:36,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:57:36,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:57:36,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:57:36,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:57:36,994 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:57:36,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:57:36,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:57:36,995 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:57:36,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:57:36,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:57:36,996 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:57:36,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:57:36,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:57:37,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:57:37,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:57:37,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:57:37,248 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:57:37,250 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:57:37,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix033_tso.oepc.yml/witness.yml [2024-06-21 20:57:37,439 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:57:37,440 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:57:37,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033_tso.oepc.i [2024-06-21 20:57:38,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:57:38,568 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:57:38,569 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033_tso.oepc.i [2024-06-21 20:57:38,578 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6943f27d/f0b6c8377eab4bba964f5b386c89b6b9/FLAG51b86d841 [2024-06-21 20:57:38,587 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6943f27d/f0b6c8377eab4bba964f5b386c89b6b9 [2024-06-21 20:57:38,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:57:38,589 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:57:38,590 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:57:38,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:57:38,593 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:57:38,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:37" (1/2) ... [2024-06-21 20:57:38,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743768d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:38, skipping insertion in model container [2024-06-21 20:57:38,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:37" (1/2) ... [2024-06-21 20:57:38,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7bf1dce4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:38, skipping insertion in model container [2024-06-21 20:57:38,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:57:38" (2/2) ... [2024-06-21 20:57:38,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743768d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:38, skipping insertion in model container [2024-06-21 20:57:38,596 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:57:38" (2/2) ... [2024-06-21 20:57:38,596 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:57:38,672 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:57:38,673 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((((! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-21 20:57:38,673 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((((! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-21 20:57:38,674 INFO L97 edCorrectnessWitness]: Location invariant before [L845-L845] (((((((((((((((((((((! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-21 20:57:38,674 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:57:38,674 INFO L106 edCorrectnessWitness]: ghost_update [L841-L841] multithreaded = 1; [2024-06-21 20:57:38,706 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:57:39,000 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:57:39,012 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:57:39,118 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:57:39,142 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:57:39,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39 WrapperNode [2024-06-21 20:57:39,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:57:39,143 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:57:39,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:57:39,143 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:57:39,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,189 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 154 [2024-06-21 20:57:39,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:57:39,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:57:39,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:57:39,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:57:39,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,202 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,220 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 20:57:39,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:57:39,234 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:57:39,234 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:57:39,234 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:57:39,235 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (1/1) ... [2024-06-21 20:57:39,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:57:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:57:39,265 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 20:57:39,284 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 20:57:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:57:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:57:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:57:39,302 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:57:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:57:39,302 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:57:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:57:39,303 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:57:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:57:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:57:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:57:39,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:57:39,305 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 20:57:39,456 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:57:39,457 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:57:39,766 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:57:39,768 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:57:39,918 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:57:39,918 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:57:39,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:57:39 BoogieIcfgContainer [2024-06-21 20:57:39,919 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:57:39,920 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:57:39,920 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:57:39,923 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:57:39,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:37" (1/4) ... [2024-06-21 20:57:39,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b8892a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:57:39, skipping insertion in model container [2024-06-21 20:57:39,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:57:38" (2/4) ... [2024-06-21 20:57:39,924 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b8892a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:57:39, skipping insertion in model container [2024-06-21 20:57:39,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:39" (3/4) ... [2024-06-21 20:57:39,924 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b8892a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:57:39, skipping insertion in model container [2024-06-21 20:57:39,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:57:39" (4/4) ... [2024-06-21 20:57:39,925 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033_tso.oepc.i [2024-06-21 20:57:39,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:57:39,937 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:57:39,937 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:57:39,967 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:57:39,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 20:57:40,008 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-21 20:57:40,009 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:57:40,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:57:40,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 20:57:40,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-21 20:57:40,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:57:40,028 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;@3ce44d5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:57:40,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:57:40,031 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:57:40,031 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:57:40,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:57:40,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:40,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:57:40,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:40,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash 385862209, now seen corresponding path program 1 times [2024-06-21 20:57:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174881041] [2024-06-21 20:57:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:40,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:41,017 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 20:57:41,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174881041] [2024-06-21 20:57:41,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174881041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:41,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:41,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:57:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925964413] [2024-06-21 20:57:41,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:41,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:57:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:57:41,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:57:41,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:41,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 20:57:41,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:41,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:41,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:41,393 INFO L124 PetriNetUnfolderBase]: 1659/2623 cut-off events. [2024-06-21 20:57:41,393 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 20:57:41,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5187 conditions, 2623 events. 1659/2623 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13520 event pairs, 1184 based on Foata normal form. 1/2512 useless extension candidates. Maximal degree in co-relation 5175. Up to 2465 conditions per place. [2024-06-21 20:57:41,408 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 20:57:41,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 179 flow [2024-06-21 20:57:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:57:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:57:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-21 20:57:41,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-06-21 20:57:41,422 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 79 transitions. [2024-06-21 20:57:41,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 179 flow [2024-06-21 20:57:41,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:41,428 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-21 20:57:41,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 20:57:41,432 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-21 20:57:41,432 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-21 20:57:41,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 20:57:41,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:41,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:41,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:57:41,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:41,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1446442080, now seen corresponding path program 1 times [2024-06-21 20:57:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:41,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934099110] [2024-06-21 20:57:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:41,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:42,083 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 20:57:42,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:42,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934099110] [2024-06-21 20:57:42,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934099110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:42,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:42,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:57:42,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242097200] [2024-06-21 20:57:42,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:42,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:57:42,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:42,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:57:42,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:57:42,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:42,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 20:57:42,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:42,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:42,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:42,422 INFO L124 PetriNetUnfolderBase]: 1905/2936 cut-off events. [2024-06-21 20:57:42,422 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2024-06-21 20:57:42,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6557 conditions, 2936 events. 1905/2936 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14818 event pairs, 1212 based on Foata normal form. 3/2888 useless extension candidates. Maximal degree in co-relation 6545. Up to 2801 conditions per place. [2024-06-21 20:57:42,433 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 20:57:42,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 248 flow [2024-06-21 20:57:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:57:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:57:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-21 20:57:42,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 20:57:42,440 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 99 transitions. [2024-06-21 20:57:42,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 248 flow [2024-06-21 20:57:42,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:57:42,442 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-21 20:57:42,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 20:57:42,443 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-21 20:57:42,443 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-21 20:57:42,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 20:57:42,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:42,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:42,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:57:42,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:42,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:42,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1890033040, now seen corresponding path program 1 times [2024-06-21 20:57:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:42,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082132827] [2024-06-21 20:57:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:42,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:43,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:43,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082132827] [2024-06-21 20:57:43,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082132827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:43,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:43,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:57:43,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795595066] [2024-06-21 20:57:43,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:43,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:57:43,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:57:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:57:43,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:43,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 20:57:43,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:43,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:43,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:43,456 INFO L124 PetriNetUnfolderBase]: 1893/2922 cut-off events. [2024-06-21 20:57:43,456 INFO L125 PetriNetUnfolderBase]: For 1534/1534 co-relation queries the response was YES. [2024-06-21 20:57:43,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7202 conditions, 2922 events. 1893/2922 cut-off events. For 1534/1534 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14751 event pairs, 878 based on Foata normal form. 6/2879 useless extension candidates. Maximal degree in co-relation 7188. Up to 2753 conditions per place. [2024-06-21 20:57:43,471 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-21 20:57:43,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 330 flow [2024-06-21 20:57:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:57:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:57:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 20:57:43,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-21 20:57:43,473 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 122 transitions. [2024-06-21 20:57:43,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 330 flow [2024-06-21 20:57:43,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 316 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:43,475 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-21 20:57:43,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 20:57:43,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-21 20:57:43,476 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-21 20:57:43,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 20:57:43,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:43,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:43,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:57:43,477 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:43,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:43,477 INFO L85 PathProgramCache]: Analyzing trace with hash 405941549, now seen corresponding path program 1 times [2024-06-21 20:57:43,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:43,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803838174] [2024-06-21 20:57:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:43,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:44,564 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 20:57:44,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:44,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803838174] [2024-06-21 20:57:44,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803838174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:44,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:44,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240063246] [2024-06-21 20:57:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:44,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:44,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:44,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:44,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:57:44,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 20:57:44,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:44,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:57:44,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:45,024 INFO L124 PetriNetUnfolderBase]: 1884/2903 cut-off events. [2024-06-21 20:57:45,024 INFO L125 PetriNetUnfolderBase]: For 2854/2854 co-relation queries the response was YES. [2024-06-21 20:57:45,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7821 conditions, 2903 events. 1884/2903 cut-off events. For 2854/2854 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14617 event pairs, 690 based on Foata normal form. 6/2858 useless extension candidates. Maximal degree in co-relation 7806. Up to 2708 conditions per place. [2024-06-21 20:57:45,041 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 53 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-21 20:57:45,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 384 flow [2024-06-21 20:57:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:57:45,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-21 20:57:45,045 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:57:45,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 384 flow [2024-06-21 20:57:45,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 360 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:45,050 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 197 flow [2024-06-21 20:57:45,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 20:57:45,051 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-21 20:57:45,051 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 197 flow [2024-06-21 20:57:45,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 20:57:45,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:45,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:45,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:57:45,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:45,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1427638969, now seen corresponding path program 1 times [2024-06-21 20:57:45,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:45,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865016798] [2024-06-21 20:57:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:45,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:45,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:45,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865016798] [2024-06-21 20:57:45,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865016798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:45,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:45,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:45,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137847994] [2024-06-21 20:57:45,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:45,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:45,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:45,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:57:45,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 20:57:45,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:45,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:57:45,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:46,146 INFO L124 PetriNetUnfolderBase]: 1627/2584 cut-off events. [2024-06-21 20:57:46,146 INFO L125 PetriNetUnfolderBase]: For 3895/3895 co-relation queries the response was YES. [2024-06-21 20:57:46,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7335 conditions, 2584 events. 1627/2584 cut-off events. For 3895/3895 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13324 event pairs, 814 based on Foata normal form. 2/2517 useless extension candidates. Maximal degree in co-relation 7318. Up to 2407 conditions per place. [2024-06-21 20:57:46,160 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 44 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-21 20:57:46,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 345 flow [2024-06-21 20:57:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:57:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:57:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-21 20:57:46,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-21 20:57:46,162 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 197 flow. Second operand 5 states and 101 transitions. [2024-06-21 20:57:46,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 345 flow [2024-06-21 20:57:46,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 312 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:46,164 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 210 flow [2024-06-21 20:57:46,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-21 20:57:46,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-21 20:57:46,165 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 210 flow [2024-06-21 20:57:46,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 20:57:46,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:46,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:46,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:57:46,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:46,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1307133913, now seen corresponding path program 1 times [2024-06-21 20:57:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:46,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144919880] [2024-06-21 20:57:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:46,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:46,878 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 20:57:46,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144919880] [2024-06-21 20:57:46,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144919880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:46,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:46,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:46,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909272532] [2024-06-21 20:57:46,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:46,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:46,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:46,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:46,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:46,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 20:57:46,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:46,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:46,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:47,304 INFO L124 PetriNetUnfolderBase]: 1918/3084 cut-off events. [2024-06-21 20:57:47,305 INFO L125 PetriNetUnfolderBase]: For 6144/6144 co-relation queries the response was YES. [2024-06-21 20:57:47,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9146 conditions, 3084 events. 1918/3084 cut-off events. For 6144/6144 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16231 event pairs, 972 based on Foata normal form. 2/3057 useless extension candidates. Maximal degree in co-relation 9127. Up to 2819 conditions per place. [2024-06-21 20:57:47,320 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-21 20:57:47,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 388 flow [2024-06-21 20:57:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 20:57:47,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 20:57:47,321 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 210 flow. Second operand 6 states and 114 transitions. [2024-06-21 20:57:47,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 388 flow [2024-06-21 20:57:47,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 366 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:47,324 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 244 flow [2024-06-21 20:57:47,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-21 20:57:47,325 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-21 20:57:47,325 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 244 flow [2024-06-21 20:57:47,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 20:57:47,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:47,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:47,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:57:47,326 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:47,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:47,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1911099942, now seen corresponding path program 1 times [2024-06-21 20:57:47,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:47,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942397228] [2024-06-21 20:57:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:47,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:48,017 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 20:57:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:48,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942397228] [2024-06-21 20:57:48,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942397228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:48,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:48,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:48,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919935655] [2024-06-21 20:57:48,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:48,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:48,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:48,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:48,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:48,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 20:57:48,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:48,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:48,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:48,548 INFO L124 PetriNetUnfolderBase]: 2094/3285 cut-off events. [2024-06-21 20:57:48,548 INFO L125 PetriNetUnfolderBase]: For 9664/9664 co-relation queries the response was YES. [2024-06-21 20:57:48,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10628 conditions, 3285 events. 2094/3285 cut-off events. For 9664/9664 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16988 event pairs, 1034 based on Foata normal form. 2/3275 useless extension candidates. Maximal degree in co-relation 10608. Up to 3060 conditions per place. [2024-06-21 20:57:48,610 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-21 20:57:48,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 442 flow [2024-06-21 20:57:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 20:57:48,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:57:48,611 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 244 flow. Second operand 6 states and 117 transitions. [2024-06-21 20:57:48,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 442 flow [2024-06-21 20:57:48,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 410 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:48,615 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 270 flow [2024-06-21 20:57:48,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-21 20:57:48,616 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-21 20:57:48,616 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 270 flow [2024-06-21 20:57:48,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 20:57:48,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:48,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:48,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:57:48,616 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:48,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:48,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1910950212, now seen corresponding path program 2 times [2024-06-21 20:57:48,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:48,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341934939] [2024-06-21 20:57:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:48,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:49,372 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 20:57:49,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:49,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341934939] [2024-06-21 20:57:49,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341934939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:49,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:49,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570723690] [2024-06-21 20:57:49,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:49,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:49,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:49,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:49,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:49,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 20:57:49,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:49,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:49,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:49,817 INFO L124 PetriNetUnfolderBase]: 2089/3280 cut-off events. [2024-06-21 20:57:49,817 INFO L125 PetriNetUnfolderBase]: For 12666/12678 co-relation queries the response was YES. [2024-06-21 20:57:49,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11316 conditions, 3280 events. 2089/3280 cut-off events. For 12666/12678 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16997 event pairs, 1041 based on Foata normal form. 10/3276 useless extension candidates. Maximal degree in co-relation 11295. Up to 3035 conditions per place. [2024-06-21 20:57:49,833 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-21 20:57:49,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 466 flow [2024-06-21 20:57:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 20:57:49,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 20:57:49,834 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 270 flow. Second operand 6 states and 116 transitions. [2024-06-21 20:57:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 466 flow [2024-06-21 20:57:49,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 432 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:49,838 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 310 flow [2024-06-21 20:57:49,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-21 20:57:49,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-21 20:57:49,838 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 310 flow [2024-06-21 20:57:49,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 20:57:49,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:49,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:57:49,839 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:49,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1506271252, now seen corresponding path program 1 times [2024-06-21 20:57:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:49,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741296310] [2024-06-21 20:57:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:49,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:50,793 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 20:57:50,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:50,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741296310] [2024-06-21 20:57:50,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741296310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:50,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:50,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:50,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409785347] [2024-06-21 20:57:50,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:50,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:50,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:50,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:50,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:50,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:50,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:50,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:50,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:51,302 INFO L124 PetriNetUnfolderBase]: 1919/3113 cut-off events. [2024-06-21 20:57:51,302 INFO L125 PetriNetUnfolderBase]: For 13547/13547 co-relation queries the response was YES. [2024-06-21 20:57:51,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11095 conditions, 3113 events. 1919/3113 cut-off events. For 13547/13547 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16553 event pairs, 936 based on Foata normal form. 2/3102 useless extension candidates. Maximal degree in co-relation 11073. Up to 2812 conditions per place. [2024-06-21 20:57:51,315 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 58 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-21 20:57:51,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 540 flow [2024-06-21 20:57:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:57:51,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-21 20:57:51,317 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 310 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:57:51,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 540 flow [2024-06-21 20:57:51,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 490 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:51,320 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 347 flow [2024-06-21 20:57:51,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=347, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-21 20:57:51,321 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-21 20:57:51,321 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 347 flow [2024-06-21 20:57:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:51,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:51,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:51,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:57:51,321 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:51,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:51,321 INFO L85 PathProgramCache]: Analyzing trace with hash 885324952, now seen corresponding path program 1 times [2024-06-21 20:57:51,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:51,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964359669] [2024-06-21 20:57:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:51,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:52,055 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 20:57:52,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:52,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964359669] [2024-06-21 20:57:52,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964359669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:52,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:52,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:52,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886651177] [2024-06-21 20:57:52,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:52,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:52,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:52,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:52,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 347 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:52,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:52,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:52,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:52,686 INFO L124 PetriNetUnfolderBase]: 2106/3319 cut-off events. [2024-06-21 20:57:52,686 INFO L125 PetriNetUnfolderBase]: For 19478/19478 co-relation queries the response was YES. [2024-06-21 20:57:52,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12835 conditions, 3319 events. 2106/3319 cut-off events. For 19478/19478 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17200 event pairs, 829 based on Foata normal form. 4/3309 useless extension candidates. Maximal degree in co-relation 12811. Up to 3039 conditions per place. [2024-06-21 20:57:52,702 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-21 20:57:52,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 629 flow [2024-06-21 20:57:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:57:52,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-21 20:57:52,703 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 347 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:57:52,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 629 flow [2024-06-21 20:57:52,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 581 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:52,708 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 397 flow [2024-06-21 20:57:52,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-21 20:57:52,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-21 20:57:52,709 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 397 flow [2024-06-21 20:57:52,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:52,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:52,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:52,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:57:52,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:52,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:52,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2031876794, now seen corresponding path program 1 times [2024-06-21 20:57:52,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:52,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745782295] [2024-06-21 20:57:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:52,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:53,540 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 20:57:53,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:53,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745782295] [2024-06-21 20:57:53,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745782295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:53,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:53,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:53,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31196378] [2024-06-21 20:57:53,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:53,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:53,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:53,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:57:53,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 397 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:57:53,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:53,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:57:53,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:54,096 INFO L124 PetriNetUnfolderBase]: 2249/3466 cut-off events. [2024-06-21 20:57:54,096 INFO L125 PetriNetUnfolderBase]: For 23640/23640 co-relation queries the response was YES. [2024-06-21 20:57:54,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14279 conditions, 3466 events. 2249/3466 cut-off events. For 23640/23640 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17394 event pairs, 888 based on Foata normal form. 2/3453 useless extension candidates. Maximal degree in co-relation 14253. Up to 3277 conditions per place. [2024-06-21 20:57:54,113 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 72 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-21 20:57:54,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 92 transitions, 661 flow [2024-06-21 20:57:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 20:57:54,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 20:57:54,114 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 397 flow. Second operand 7 states and 128 transitions. [2024-06-21 20:57:54,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 92 transitions, 661 flow [2024-06-21 20:57:54,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 616 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:54,120 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 430 flow [2024-06-21 20:57:54,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-06-21 20:57:54,121 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-21 20:57:54,121 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 430 flow [2024-06-21 20:57:54,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:57:54,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:54,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:54,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:57:54,121 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:54,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:54,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2092387886, now seen corresponding path program 2 times [2024-06-21 20:57:54,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:54,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167469792] [2024-06-21 20:57:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:54,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:54,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:54,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167469792] [2024-06-21 20:57:54,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167469792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:54,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:54,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:54,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261636304] [2024-06-21 20:57:54,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:54,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:54,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:54,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:54,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:54,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:54,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:54,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:55,458 INFO L124 PetriNetUnfolderBase]: 2174/3399 cut-off events. [2024-06-21 20:57:55,458 INFO L125 PetriNetUnfolderBase]: For 29141/29151 co-relation queries the response was YES. [2024-06-21 20:57:55,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14815 conditions, 3399 events. 2174/3399 cut-off events. For 29141/29151 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17480 event pairs, 817 based on Foata normal form. 4/3376 useless extension candidates. Maximal degree in co-relation 14788. Up to 3082 conditions per place. [2024-06-21 20:57:55,476 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 69 selfloop transitions, 25 changer transitions 0/102 dead transitions. [2024-06-21 20:57:55,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 102 transitions, 810 flow [2024-06-21 20:57:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:57:55,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-21 20:57:55,477 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 430 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:57:55,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 102 transitions, 810 flow [2024-06-21 20:57:55,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 756 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:55,485 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 520 flow [2024-06-21 20:57:55,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=520, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-21 20:57:55,485 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-21 20:57:55,485 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 520 flow [2024-06-21 20:57:55,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:55,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:55,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:55,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:57:55,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:55,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:55,486 INFO L85 PathProgramCache]: Analyzing trace with hash 550223744, now seen corresponding path program 2 times [2024-06-21 20:57:55,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:55,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238974686] [2024-06-21 20:57:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:55,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:56,332 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 20:57:56,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:56,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238974686] [2024-06-21 20:57:56,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238974686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:56,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:56,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561366909] [2024-06-21 20:57:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:56,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:56,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:56,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:57:56,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:57:56,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:56,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:57:56,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:56,863 INFO L124 PetriNetUnfolderBase]: 2298/3536 cut-off events. [2024-06-21 20:57:56,863 INFO L125 PetriNetUnfolderBase]: For 34491/34506 co-relation queries the response was YES. [2024-06-21 20:57:56,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16100 conditions, 3536 events. 2298/3536 cut-off events. For 34491/34506 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17748 event pairs, 881 based on Foata normal form. 12/3528 useless extension candidates. Maximal degree in co-relation 16072. Up to 3301 conditions per place. [2024-06-21 20:57:56,878 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 72 selfloop transitions, 27 changer transitions 0/104 dead transitions. [2024-06-21 20:57:56,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 104 transitions, 904 flow [2024-06-21 20:57:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:57:56,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-21 20:57:56,879 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 520 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:57:56,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 104 transitions, 904 flow [2024-06-21 20:57:56,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 854 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:56,889 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 622 flow [2024-06-21 20:57:56,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=622, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-21 20:57:56,890 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-21 20:57:56,890 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 622 flow [2024-06-21 20:57:56,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:57:56,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:56,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:56,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:57:56,890 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:56,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:56,891 INFO L85 PathProgramCache]: Analyzing trace with hash 549986408, now seen corresponding path program 3 times [2024-06-21 20:57:56,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:56,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017044669] [2024-06-21 20:57:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:56,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:57,698 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 20:57:57,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:57,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017044669] [2024-06-21 20:57:57,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017044669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:57,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:57,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:57,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093544893] [2024-06-21 20:57:57,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:57,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:57,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:57,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 622 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:57,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:57,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:57,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:58,273 INFO L124 PetriNetUnfolderBase]: 2161/3403 cut-off events. [2024-06-21 20:57:58,273 INFO L125 PetriNetUnfolderBase]: For 39203/39218 co-relation queries the response was YES. [2024-06-21 20:57:58,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16077 conditions, 3403 events. 2161/3403 cut-off events. For 39203/39218 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17640 event pairs, 818 based on Foata normal form. 10/3393 useless extension candidates. Maximal degree in co-relation 16047. Up to 3031 conditions per place. [2024-06-21 20:57:58,292 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 31 changer transitions 0/109 dead transitions. [2024-06-21 20:57:58,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 109 transitions, 982 flow [2024-06-21 20:57:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:57:58,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:57:58,293 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 622 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:57:58,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 109 transitions, 982 flow [2024-06-21 20:57:58,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 926 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:58,309 INFO L231 Difference]: Finished difference. Result has 83 places, 86 transitions, 690 flow [2024-06-21 20:57:58,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=690, PETRI_PLACES=83, PETRI_TRANSITIONS=86} [2024-06-21 20:57:58,309 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-21 20:57:58,309 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 86 transitions, 690 flow [2024-06-21 20:57:58,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:58,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:58,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:58,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:57:58,310 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:58,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1250259928, now seen corresponding path program 3 times [2024-06-21 20:57:58,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:58,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784052298] [2024-06-21 20:57:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:58,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:59,142 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 20:57:59,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:59,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784052298] [2024-06-21 20:57:59,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784052298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:59,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:59,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529398472] [2024-06-21 20:57:59,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:59,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:59,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:59,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:59,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:57:59,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 86 transitions, 690 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:57:59,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:59,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:57:59,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:59,649 INFO L124 PetriNetUnfolderBase]: 2283/3522 cut-off events. [2024-06-21 20:57:59,650 INFO L125 PetriNetUnfolderBase]: For 44823/44829 co-relation queries the response was YES. [2024-06-21 20:57:59,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17401 conditions, 3522 events. 2283/3522 cut-off events. For 44823/44829 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17700 event pairs, 876 based on Foata normal form. 6/3511 useless extension candidates. Maximal degree in co-relation 17369. Up to 3282 conditions per place. [2024-06-21 20:57:59,667 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 72 selfloop transitions, 29 changer transitions 0/106 dead transitions. [2024-06-21 20:57:59,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 952 flow [2024-06-21 20:57:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:57:59,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 20:57:59,668 INFO L175 Difference]: Start difference. First operand has 83 places, 86 transitions, 690 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:57:59,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 952 flow [2024-06-21 20:57:59,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 106 transitions, 828 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:59,686 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 652 flow [2024-06-21 20:57:59,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=652, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-21 20:57:59,687 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-21 20:57:59,687 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 652 flow [2024-06-21 20:57:59,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:57:59,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:59,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:59,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:57:59,688 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:59,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1628058077, now seen corresponding path program 1 times [2024-06-21 20:57:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:59,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824243187] [2024-06-21 20:57:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:00,210 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 20:58:00,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:00,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824243187] [2024-06-21 20:58:00,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824243187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:00,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:00,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:58:00,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196336982] [2024-06-21 20:58:00,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:00,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:58:00,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:00,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:58:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:58:00,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:00,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 652 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 20:58:00,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:00,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:00,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:00,724 INFO L124 PetriNetUnfolderBase]: 2166/3520 cut-off events. [2024-06-21 20:58:00,725 INFO L125 PetriNetUnfolderBase]: For 46267/46267 co-relation queries the response was YES. [2024-06-21 20:58:00,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17030 conditions, 3520 events. 2166/3520 cut-off events. For 46267/46267 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18771 event pairs, 834 based on Foata normal form. 1/3505 useless extension candidates. Maximal degree in co-relation 16996. Up to 3173 conditions per place. [2024-06-21 20:58:00,743 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 79 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2024-06-21 20:58:00,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 98 transitions, 868 flow [2024-06-21 20:58:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:58:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:58:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 20:58:00,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-21 20:58:00,744 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 652 flow. Second operand 5 states and 93 transitions. [2024-06-21 20:58:00,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 98 transitions, 868 flow [2024-06-21 20:58:00,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 98 transitions, 801 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:00,762 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 637 flow [2024-06-21 20:58:00,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=637, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2024-06-21 20:58:00,763 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-21 20:58:00,763 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 637 flow [2024-06-21 20:58:00,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 20:58:00,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:00,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:00,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:58:00,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:00,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash -799212223, now seen corresponding path program 1 times [2024-06-21 20:58:00,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:00,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005158753] [2024-06-21 20:58:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:00,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:01,808 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 20:58:01,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:01,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005158753] [2024-06-21 20:58:01,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005158753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:01,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:01,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:01,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971740479] [2024-06-21 20:58:01,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:01,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:01,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:01,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:01,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:01,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:01,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 637 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:01,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:01,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:01,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:02,496 INFO L124 PetriNetUnfolderBase]: 2149/3380 cut-off events. [2024-06-21 20:58:02,496 INFO L125 PetriNetUnfolderBase]: For 50928/50928 co-relation queries the response was YES. [2024-06-21 20:58:02,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17374 conditions, 3380 events. 2149/3380 cut-off events. For 50928/50928 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17342 event pairs, 800 based on Foata normal form. 2/3379 useless extension candidates. Maximal degree in co-relation 17338. Up to 3081 conditions per place. [2024-06-21 20:58:02,513 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 84 selfloop transitions, 21 changer transitions 0/115 dead transitions. [2024-06-21 20:58:02,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 115 transitions, 913 flow [2024-06-21 20:58:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:58:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:58:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:58:02,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-21 20:58:02,515 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 637 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:58:02,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 115 transitions, 913 flow [2024-06-21 20:58:02,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 115 transitions, 859 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:58:02,531 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 637 flow [2024-06-21 20:58:02,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=637, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-06-21 20:58:02,531 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-21 20:58:02,531 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 637 flow [2024-06-21 20:58:02,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:02,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:02,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:02,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:58:02,532 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:02,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1675270902, now seen corresponding path program 1 times [2024-06-21 20:58:02,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:02,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56130653] [2024-06-21 20:58:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:03,376 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 20:58:03,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:03,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56130653] [2024-06-21 20:58:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56130653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:03,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:03,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:03,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854708386] [2024-06-21 20:58:03,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:03,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:03,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:03,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:03,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 637 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:03,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:03,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:03,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:04,018 INFO L124 PetriNetUnfolderBase]: 2297/3537 cut-off events. [2024-06-21 20:58:04,018 INFO L125 PetriNetUnfolderBase]: For 56639/56639 co-relation queries the response was YES. [2024-06-21 20:58:04,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18525 conditions, 3537 events. 2297/3537 cut-off events. For 56639/56639 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17653 event pairs, 845 based on Foata normal form. 4/3538 useless extension candidates. Maximal degree in co-relation 18488. Up to 3295 conditions per place. [2024-06-21 20:58:04,036 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 97 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-21 20:58:04,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 124 transitions, 1007 flow [2024-06-21 20:58:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:58:04,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 20:58:04,037 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 637 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:58:04,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 124 transitions, 1007 flow [2024-06-21 20:58:04,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 124 transitions, 957 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:04,057 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 693 flow [2024-06-21 20:58:04,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=693, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-06-21 20:58:04,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-21 20:58:04,058 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 693 flow [2024-06-21 20:58:04,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:04,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:04,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:04,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:58:04,058 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:04,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1678989972, now seen corresponding path program 2 times [2024-06-21 20:58:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678419726] [2024-06-21 20:58:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:04,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:04,922 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 20:58:04,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:04,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678419726] [2024-06-21 20:58:04,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678419726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:04,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:04,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147241555] [2024-06-21 20:58:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:04,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:04,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:05,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:05,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 693 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:05,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:05,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:05,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:05,634 INFO L124 PetriNetUnfolderBase]: 2367/3633 cut-off events. [2024-06-21 20:58:05,634 INFO L125 PetriNetUnfolderBase]: For 66354/66354 co-relation queries the response was YES. [2024-06-21 20:58:05,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19979 conditions, 3633 events. 2367/3633 cut-off events. For 66354/66354 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18098 event pairs, 839 based on Foata normal form. 4/3634 useless extension candidates. Maximal degree in co-relation 19941. Up to 3293 conditions per place. [2024-06-21 20:58:05,653 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-06-21 20:58:05,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 1341 flow [2024-06-21 20:58:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:58:05,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:58:05,654 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 693 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:58:05,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 1341 flow [2024-06-21 20:58:05,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 135 transitions, 1259 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:05,673 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 861 flow [2024-06-21 20:58:05,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-21 20:58:05,673 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-21 20:58:05,673 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 861 flow [2024-06-21 20:58:05,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:05,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:05,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:05,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:58:05,673 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:05,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:05,674 INFO L85 PathProgramCache]: Analyzing trace with hash 439521989, now seen corresponding path program 1 times [2024-06-21 20:58:05,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:05,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833460611] [2024-06-21 20:58:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:05,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:06,521 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 20:58:06,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:06,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833460611] [2024-06-21 20:58:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833460611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:06,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:06,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327910534] [2024-06-21 20:58:06,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:06,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:06,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:06,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:06,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:06,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 861 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:06,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:06,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:06,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:07,154 INFO L124 PetriNetUnfolderBase]: 2378/3659 cut-off events. [2024-06-21 20:58:07,154 INFO L125 PetriNetUnfolderBase]: For 74552/74552 co-relation queries the response was YES. [2024-06-21 20:58:07,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20790 conditions, 3659 events. 2378/3659 cut-off events. For 74552/74552 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18342 event pairs, 826 based on Foata normal form. 2/3658 useless extension candidates. Maximal degree in co-relation 20751. Up to 3456 conditions per place. [2024-06-21 20:58:07,176 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 106 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-21 20:58:07,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1223 flow [2024-06-21 20:58:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:58:07,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 20:58:07,178 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 861 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:58:07,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1223 flow [2024-06-21 20:58:07,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1155 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:58:07,203 INFO L231 Difference]: Finished difference. Result has 100 places, 106 transitions, 895 flow [2024-06-21 20:58:07,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=100, PETRI_TRANSITIONS=106} [2024-06-21 20:58:07,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-21 20:58:07,204 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 106 transitions, 895 flow [2024-06-21 20:58:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:07,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:07,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:07,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:58:07,205 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:07,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1678995552, now seen corresponding path program 3 times [2024-06-21 20:58:07,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:07,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944413573] [2024-06-21 20:58:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:07,997 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 20:58:07,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944413573] [2024-06-21 20:58:07,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944413573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:07,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:07,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:07,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934522293] [2024-06-21 20:58:07,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:07,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:07,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:08,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:08,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 106 transitions, 895 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:08,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:08,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:08,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:08,644 INFO L124 PetriNetUnfolderBase]: 2368/3637 cut-off events. [2024-06-21 20:58:08,645 INFO L125 PetriNetUnfolderBase]: For 80543/80543 co-relation queries the response was YES. [2024-06-21 20:58:08,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21242 conditions, 3637 events. 2368/3637 cut-off events. For 80543/80543 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18142 event pairs, 811 based on Foata normal form. 4/3638 useless extension candidates. Maximal degree in co-relation 21201. Up to 3301 conditions per place. [2024-06-21 20:58:08,662 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 39 changer transitions 0/136 dead transitions. [2024-06-21 20:58:08,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 1317 flow [2024-06-21 20:58:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:58:08,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 20:58:08,663 INFO L175 Difference]: Start difference. First operand has 100 places, 106 transitions, 895 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:58:08,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 1317 flow [2024-06-21 20:58:08,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1199 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:08,691 INFO L231 Difference]: Finished difference. Result has 102 places, 106 transitions, 863 flow [2024-06-21 20:58:08,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=863, PETRI_PLACES=102, PETRI_TRANSITIONS=106} [2024-06-21 20:58:08,691 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-21 20:58:08,691 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 106 transitions, 863 flow [2024-06-21 20:58:08,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:08,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:08,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:08,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:58:08,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:08,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1642983463, now seen corresponding path program 2 times [2024-06-21 20:58:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:08,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470255764] [2024-06-21 20:58:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:09,553 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 20:58:09,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:09,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470255764] [2024-06-21 20:58:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470255764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:09,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:09,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:09,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516519701] [2024-06-21 20:58:09,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:09,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:09,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:09,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 106 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:09,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:09,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:09,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:10,137 INFO L124 PetriNetUnfolderBase]: 2395/3687 cut-off events. [2024-06-21 20:58:10,137 INFO L125 PetriNetUnfolderBase]: For 87399/87405 co-relation queries the response was YES. [2024-06-21 20:58:10,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21850 conditions, 3687 events. 2395/3687 cut-off events. For 87399/87405 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18496 event pairs, 830 based on Foata normal form. 6/3689 useless extension candidates. Maximal degree in co-relation 21808. Up to 3396 conditions per place. [2024-06-21 20:58:10,160 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 96 selfloop transitions, 40 changer transitions 0/141 dead transitions. [2024-06-21 20:58:10,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 141 transitions, 1531 flow [2024-06-21 20:58:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:58:10,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 20:58:10,162 INFO L175 Difference]: Start difference. First operand has 102 places, 106 transitions, 863 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:58:10,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 141 transitions, 1531 flow [2024-06-21 20:58:10,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1457 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:10,188 INFO L231 Difference]: Finished difference. Result has 104 places, 115 transitions, 1051 flow [2024-06-21 20:58:10,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1051, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2024-06-21 20:58:10,189 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-21 20:58:10,189 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 1051 flow [2024-06-21 20:58:10,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:10,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:10,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:10,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:58:10,189 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:10,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash 583614112, now seen corresponding path program 4 times [2024-06-21 20:58:10,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:10,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723016604] [2024-06-21 20:58:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:11,104 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 20:58:11,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:11,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723016604] [2024-06-21 20:58:11,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723016604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:11,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:11,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:11,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633187200] [2024-06-21 20:58:11,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:11,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:11,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:11,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:11,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:11,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:11,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 1051 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:11,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:11,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:11,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:11,729 INFO L124 PetriNetUnfolderBase]: 2417/3725 cut-off events. [2024-06-21 20:58:11,729 INFO L125 PetriNetUnfolderBase]: For 96998/97004 co-relation queries the response was YES. [2024-06-21 20:58:11,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22749 conditions, 3725 events. 2417/3725 cut-off events. For 96998/97004 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18716 event pairs, 823 based on Foata normal form. 8/3726 useless extension candidates. Maximal degree in co-relation 22706. Up to 3257 conditions per place. [2024-06-21 20:58:11,749 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 57 changer transitions 0/149 dead transitions. [2024-06-21 20:58:11,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 149 transitions, 1629 flow [2024-06-21 20:58:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:58:11,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 20:58:11,750 INFO L175 Difference]: Start difference. First operand has 104 places, 115 transitions, 1051 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:58:11,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 149 transitions, 1629 flow [2024-06-21 20:58:11,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1554 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:58:11,790 INFO L231 Difference]: Finished difference. Result has 109 places, 121 transitions, 1232 flow [2024-06-21 20:58:11,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1232, PETRI_PLACES=109, PETRI_TRANSITIONS=121} [2024-06-21 20:58:11,791 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-21 20:58:11,791 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 121 transitions, 1232 flow [2024-06-21 20:58:11,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:11,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:11,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:11,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:58:11,792 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:11,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1643250373, now seen corresponding path program 3 times [2024-06-21 20:58:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:11,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650061082] [2024-06-21 20:58:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:12,643 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 20:58:12,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:12,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650061082] [2024-06-21 20:58:12,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650061082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:12,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:12,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:12,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506610247] [2024-06-21 20:58:12,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:12,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:12,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:12,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:12,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:12,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 121 transitions, 1232 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:12,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:12,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:12,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:13,287 INFO L124 PetriNetUnfolderBase]: 2412/3717 cut-off events. [2024-06-21 20:58:13,287 INFO L125 PetriNetUnfolderBase]: For 104797/104803 co-relation queries the response was YES. [2024-06-21 20:58:13,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23532 conditions, 3717 events. 2412/3717 cut-off events. For 104797/104803 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18675 event pairs, 829 based on Foata normal form. 6/3718 useless extension candidates. Maximal degree in co-relation 23487. Up to 3423 conditions per place. [2024-06-21 20:58:13,311 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2024-06-21 20:58:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 145 transitions, 1662 flow [2024-06-21 20:58:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:58:13,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-21 20:58:13,311 INFO L175 Difference]: Start difference. First operand has 109 places, 121 transitions, 1232 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:58:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 145 transitions, 1662 flow [2024-06-21 20:58:13,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 145 transitions, 1520 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:13,366 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 1182 flow [2024-06-21 20:58:13,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1182, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-06-21 20:58:13,367 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-21 20:58:13,367 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 1182 flow [2024-06-21 20:58:13,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:13,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:13,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:13,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:58:13,367 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:13,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1635626016, now seen corresponding path program 5 times [2024-06-21 20:58:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:13,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191778415] [2024-06-21 20:58:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:14,241 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 20:58:14,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:14,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191778415] [2024-06-21 20:58:14,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191778415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:14,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:14,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:14,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346804550] [2024-06-21 20:58:14,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:14,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:14,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:14,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:14,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:14,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:14,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 1182 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:14,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:14,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:14,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:14,842 INFO L124 PetriNetUnfolderBase]: 2434/3750 cut-off events. [2024-06-21 20:58:14,842 INFO L125 PetriNetUnfolderBase]: For 112036/112042 co-relation queries the response was YES. [2024-06-21 20:58:14,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24001 conditions, 3750 events. 2434/3750 cut-off events. For 112036/112042 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18848 event pairs, 833 based on Foata normal form. 8/3751 useless extension candidates. Maximal degree in co-relation 23954. Up to 3269 conditions per place. [2024-06-21 20:58:14,866 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 57 changer transitions 0/154 dead transitions. [2024-06-21 20:58:14,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 154 transitions, 1814 flow [2024-06-21 20:58:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:58:14,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:58:14,869 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 1182 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:58:14,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 154 transitions, 1814 flow [2024-06-21 20:58:14,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 154 transitions, 1732 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:14,919 INFO L231 Difference]: Finished difference. Result has 115 places, 124 transitions, 1288 flow [2024-06-21 20:58:14,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1288, PETRI_PLACES=115, PETRI_TRANSITIONS=124} [2024-06-21 20:58:14,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 20:58:14,920 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 124 transitions, 1288 flow [2024-06-21 20:58:14,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:14,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:14,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:14,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:58:14,920 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:14,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:14,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1635631596, now seen corresponding path program 6 times [2024-06-21 20:58:14,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:14,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214880959] [2024-06-21 20:58:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:14,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:15,777 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 20:58:15,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:15,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214880959] [2024-06-21 20:58:15,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214880959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:15,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:15,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:15,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780627425] [2024-06-21 20:58:15,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:15,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:15,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:15,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:15,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:15,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:15,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 124 transitions, 1288 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:15,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:15,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:15,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:16,418 INFO L124 PetriNetUnfolderBase]: 2424/3736 cut-off events. [2024-06-21 20:58:16,418 INFO L125 PetriNetUnfolderBase]: For 118532/118538 co-relation queries the response was YES. [2024-06-21 20:58:16,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24236 conditions, 3736 events. 2424/3736 cut-off events. For 118532/118538 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18769 event pairs, 831 based on Foata normal form. 8/3737 useless extension candidates. Maximal degree in co-relation 24188. Up to 3261 conditions per place. [2024-06-21 20:58:16,443 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 56 changer transitions 0/153 dead transitions. [2024-06-21 20:58:16,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 153 transitions, 1762 flow [2024-06-21 20:58:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:58:16,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:58:16,445 INFO L175 Difference]: Start difference. First operand has 115 places, 124 transitions, 1288 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:58:16,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 153 transitions, 1762 flow [2024-06-21 20:58:16,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 153 transitions, 1526 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:16,507 INFO L231 Difference]: Finished difference. Result has 117 places, 124 transitions, 1172 flow [2024-06-21 20:58:16,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1172, PETRI_PLACES=117, PETRI_TRANSITIONS=124} [2024-06-21 20:58:16,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-21 20:58:16,508 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 124 transitions, 1172 flow [2024-06-21 20:58:16,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:16,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:16,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:16,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:58:16,508 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:16,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1635631813, now seen corresponding path program 4 times [2024-06-21 20:58:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:16,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659246729] [2024-06-21 20:58:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:16,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:17,442 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 20:58:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:17,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659246729] [2024-06-21 20:58:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659246729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:17,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:17,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045732089] [2024-06-21 20:58:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:17,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:17,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:17,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:17,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 124 transitions, 1172 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:17,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:17,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:17,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:18,045 INFO L124 PetriNetUnfolderBase]: 2419/3728 cut-off events. [2024-06-21 20:58:18,045 INFO L125 PetriNetUnfolderBase]: For 120627/120633 co-relation queries the response was YES. [2024-06-21 20:58:18,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23723 conditions, 3728 events. 2419/3728 cut-off events. For 120627/120633 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18746 event pairs, 827 based on Foata normal form. 6/3729 useless extension candidates. Maximal degree in co-relation 23675. Up to 3436 conditions per place. [2024-06-21 20:58:18,069 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 100 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-21 20:58:18,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 146 transitions, 1510 flow [2024-06-21 20:58:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 20:58:18,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-21 20:58:18,070 INFO L175 Difference]: Start difference. First operand has 117 places, 124 transitions, 1172 flow. Second operand 9 states and 158 transitions. [2024-06-21 20:58:18,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 146 transitions, 1510 flow [2024-06-21 20:58:18,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 146 transitions, 1322 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 20:58:18,118 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 1074 flow [2024-06-21 20:58:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1074, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2024-06-21 20:58:18,118 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-21 20:58:18,118 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 1074 flow [2024-06-21 20:58:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:58:18,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:18,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:18,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:58:18,119 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:18,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:18,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1643260293, now seen corresponding path program 1 times [2024-06-21 20:58:18,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:18,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907543021] [2024-06-21 20:58:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:18,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:19,219 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 20:58:19,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:19,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907543021] [2024-06-21 20:58:19,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907543021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:19,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:19,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:19,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425282892] [2024-06-21 20:58:19,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:19,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:19,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:19,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:19,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 1074 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:19,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:19,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:19,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:19,850 INFO L124 PetriNetUnfolderBase]: 2436/3855 cut-off events. [2024-06-21 20:58:19,850 INFO L125 PetriNetUnfolderBase]: For 124999/124999 co-relation queries the response was YES. [2024-06-21 20:58:19,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23731 conditions, 3855 events. 2436/3855 cut-off events. For 124999/124999 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19894 event pairs, 813 based on Foata normal form. 2/3836 useless extension candidates. Maximal degree in co-relation 23682. Up to 3546 conditions per place. [2024-06-21 20:58:19,875 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 130 selfloop transitions, 21 changer transitions 0/156 dead transitions. [2024-06-21 20:58:19,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 156 transitions, 1515 flow [2024-06-21 20:58:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 20:58:19,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-21 20:58:19,876 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 1074 flow. Second operand 9 states and 157 transitions. [2024-06-21 20:58:19,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 156 transitions, 1515 flow [2024-06-21 20:58:19,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 156 transitions, 1385 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 20:58:19,937 INFO L231 Difference]: Finished difference. Result has 119 places, 130 transitions, 1079 flow [2024-06-21 20:58:19,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1079, PETRI_PLACES=119, PETRI_TRANSITIONS=130} [2024-06-21 20:58:19,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-21 20:58:19,938 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 130 transitions, 1079 flow [2024-06-21 20:58:19,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:19,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:19,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:58:19,939 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:19,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1069805811, now seen corresponding path program 1 times [2024-06-21 20:58:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:19,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705068949] [2024-06-21 20:58:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:19,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:20,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705068949] [2024-06-21 20:58:20,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705068949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:20,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:20,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:58:20,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921901194] [2024-06-21 20:58:20,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:20,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:58:20,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:58:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:58:20,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:20,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 130 transitions, 1079 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:20,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:20,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:20,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:21,231 INFO L124 PetriNetUnfolderBase]: 2629/4082 cut-off events. [2024-06-21 20:58:21,231 INFO L125 PetriNetUnfolderBase]: For 154225/154225 co-relation queries the response was YES. [2024-06-21 20:58:21,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26509 conditions, 4082 events. 2629/4082 cut-off events. For 154225/154225 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20770 event pairs, 919 based on Foata normal form. 1/4080 useless extension candidates. Maximal degree in co-relation 26458. Up to 3814 conditions per place. [2024-06-21 20:58:21,260 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 113 selfloop transitions, 12 changer transitions 0/141 dead transitions. [2024-06-21 20:58:21,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 141 transitions, 1377 flow [2024-06-21 20:58:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:58:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:58:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 20:58:21,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 20:58:21,261 INFO L175 Difference]: Start difference. First operand has 119 places, 130 transitions, 1079 flow. Second operand 6 states and 102 transitions. [2024-06-21 20:58:21,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 141 transitions, 1377 flow [2024-06-21 20:58:21,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 141 transitions, 1295 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:21,350 INFO L231 Difference]: Finished difference. Result has 119 places, 133 transitions, 1061 flow [2024-06-21 20:58:21,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1061, PETRI_PLACES=119, PETRI_TRANSITIONS=133} [2024-06-21 20:58:21,351 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-21 20:58:21,351 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 133 transitions, 1061 flow [2024-06-21 20:58:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:21,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:21,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:21,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:58:21,352 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:21,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash 390929687, now seen corresponding path program 1 times [2024-06-21 20:58:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040946339] [2024-06-21 20:58:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:21,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:22,356 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 20:58:22,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:22,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040946339] [2024-06-21 20:58:22,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040946339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:22,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:22,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:22,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715270597] [2024-06-21 20:58:22,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:22,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:22,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:22,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:22,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 1061 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:58:22,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:22,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:22,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:23,219 INFO L124 PetriNetUnfolderBase]: 2629/4081 cut-off events. [2024-06-21 20:58:23,219 INFO L125 PetriNetUnfolderBase]: For 182775/182785 co-relation queries the response was YES. [2024-06-21 20:58:23,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28490 conditions, 4081 events. 2629/4081 cut-off events. For 182775/182785 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21348 event pairs, 704 based on Foata normal form. 4/4076 useless extension candidates. Maximal degree in co-relation 28438. Up to 3680 conditions per place. [2024-06-21 20:58:23,250 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 126 selfloop transitions, 19 changer transitions 0/164 dead transitions. [2024-06-21 20:58:23,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 164 transitions, 1481 flow [2024-06-21 20:58:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:58:23,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 20:58:23,251 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 1061 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:58:23,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 164 transitions, 1481 flow [2024-06-21 20:58:23,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 164 transitions, 1439 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:23,307 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 1122 flow [2024-06-21 20:58:23,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1122, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2024-06-21 20:58:23,307 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-21 20:58:23,308 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 1122 flow [2024-06-21 20:58:23,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:58:23,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:23,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:23,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:58:23,308 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:23,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:23,309 INFO L85 PathProgramCache]: Analyzing trace with hash 390990261, now seen corresponding path program 1 times [2024-06-21 20:58:23,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:23,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092274048] [2024-06-21 20:58:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:23,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:24,433 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 20:58:24,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092274048] [2024-06-21 20:58:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092274048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:24,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:24,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205968218] [2024-06-21 20:58:24,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:24,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:24,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:24,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:24,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:24,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 1122 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:24,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:24,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:24,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:25,307 INFO L124 PetriNetUnfolderBase]: 2877/4383 cut-off events. [2024-06-21 20:58:25,307 INFO L125 PetriNetUnfolderBase]: For 195967/195977 co-relation queries the response was YES. [2024-06-21 20:58:25,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30776 conditions, 4383 events. 2877/4383 cut-off events. For 195967/195977 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22276 event pairs, 900 based on Foata normal form. 2/4370 useless extension candidates. Maximal degree in co-relation 30723. Up to 4050 conditions per place. [2024-06-21 20:58:25,386 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 142 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-21 20:58:25,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 185 transitions, 1799 flow [2024-06-21 20:58:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:58:25,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 20:58:25,387 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 1122 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:58:25,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 185 transitions, 1799 flow [2024-06-21 20:58:25,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 185 transitions, 1696 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:25,484 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1387 flow [2024-06-21 20:58:25,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1387, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-21 20:58:25,485 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-21 20:58:25,485 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1387 flow [2024-06-21 20:58:25,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:25,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:25,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:25,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:58:25,485 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:25,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:25,486 INFO L85 PathProgramCache]: Analyzing trace with hash 622008621, now seen corresponding path program 2 times [2024-06-21 20:58:25,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:25,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736412167] [2024-06-21 20:58:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:25,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:26,588 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 20:58:26,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:26,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736412167] [2024-06-21 20:58:26,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736412167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:26,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:26,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:26,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175396162] [2024-06-21 20:58:26,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:26,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:26,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:26,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:26,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:26,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1387 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:58:26,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:26,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:26,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:27,470 INFO L124 PetriNetUnfolderBase]: 2737/4256 cut-off events. [2024-06-21 20:58:27,470 INFO L125 PetriNetUnfolderBase]: For 209567/209577 co-relation queries the response was YES. [2024-06-21 20:58:27,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30481 conditions, 4256 events. 2737/4256 cut-off events. For 209567/209577 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22331 event pairs, 861 based on Foata normal form. 4/4251 useless extension candidates. Maximal degree in co-relation 30424. Up to 3781 conditions per place. [2024-06-21 20:58:27,502 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 128 selfloop transitions, 38 changer transitions 0/187 dead transitions. [2024-06-21 20:58:27,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 187 transitions, 1851 flow [2024-06-21 20:58:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:58:27,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:58:27,503 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1387 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:58:27,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 187 transitions, 1851 flow [2024-06-21 20:58:27,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 187 transitions, 1783 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 20:58:27,590 INFO L231 Difference]: Finished difference. Result has 135 places, 159 transitions, 1467 flow [2024-06-21 20:58:27,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1467, PETRI_PLACES=135, PETRI_TRANSITIONS=159} [2024-06-21 20:58:27,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-21 20:58:27,590 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 159 transitions, 1467 flow [2024-06-21 20:58:27,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:58:27,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:27,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:27,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:58:27,591 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:27,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash 624810091, now seen corresponding path program 1 times [2024-06-21 20:58:27,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:27,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986381285] [2024-06-21 20:58:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:27,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:28,465 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 20:58:28,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:28,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986381285] [2024-06-21 20:58:28,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986381285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:28,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:28,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:28,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792639484] [2024-06-21 20:58:28,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:28,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:28,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:28,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:28,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 159 transitions, 1467 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:28,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:28,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:28,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:29,298 INFO L124 PetriNetUnfolderBase]: 2916/4452 cut-off events. [2024-06-21 20:58:29,298 INFO L125 PetriNetUnfolderBase]: For 225449/225459 co-relation queries the response was YES. [2024-06-21 20:58:29,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32271 conditions, 4452 events. 2916/4452 cut-off events. For 225449/225459 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22808 event pairs, 871 based on Foata normal form. 4/4447 useless extension candidates. Maximal degree in co-relation 32212. Up to 4053 conditions per place. [2024-06-21 20:58:29,329 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 149 selfloop transitions, 40 changer transitions 0/196 dead transitions. [2024-06-21 20:58:29,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 196 transitions, 2008 flow [2024-06-21 20:58:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:58:29,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-21 20:58:29,331 INFO L175 Difference]: Start difference. First operand has 135 places, 159 transitions, 1467 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:58:29,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 196 transitions, 2008 flow [2024-06-21 20:58:29,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 196 transitions, 1884 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:29,404 INFO L231 Difference]: Finished difference. Result has 138 places, 162 transitions, 1504 flow [2024-06-21 20:58:29,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=138, PETRI_TRANSITIONS=162} [2024-06-21 20:58:29,404 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-21 20:58:29,404 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 162 transitions, 1504 flow [2024-06-21 20:58:29,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:29,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:29,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:29,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:58:29,404 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:29,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash 740096301, now seen corresponding path program 3 times [2024-06-21 20:58:29,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:29,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800513653] [2024-06-21 20:58:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:29,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:30,564 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 20:58:30,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:30,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800513653] [2024-06-21 20:58:30,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800513653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:30,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:30,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:30,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978448032] [2024-06-21 20:58:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:30,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:30,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:30,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:30,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 162 transitions, 1504 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:58:30,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:30,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:30,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:31,443 INFO L124 PetriNetUnfolderBase]: 2775/4321 cut-off events. [2024-06-21 20:58:31,443 INFO L125 PetriNetUnfolderBase]: For 239504/239514 co-relation queries the response was YES. [2024-06-21 20:58:31,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32352 conditions, 4321 events. 2775/4321 cut-off events. For 239504/239514 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22733 event pairs, 835 based on Foata normal form. 4/4316 useless extension candidates. Maximal degree in co-relation 32292. Up to 3810 conditions per place. [2024-06-21 20:58:31,475 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 129 selfloop transitions, 41 changer transitions 0/191 dead transitions. [2024-06-21 20:58:31,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 191 transitions, 1980 flow [2024-06-21 20:58:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:58:31,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:58:31,476 INFO L175 Difference]: Start difference. First operand has 138 places, 162 transitions, 1504 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:58:31,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 191 transitions, 1980 flow [2024-06-21 20:58:31,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 191 transitions, 1845 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:31,579 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1526 flow [2024-06-21 20:58:31,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1526, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-06-21 20:58:31,579 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-21 20:58:31,579 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1526 flow [2024-06-21 20:58:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:58:31,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:31,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:58:31,580 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:31,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash 740101261, now seen corresponding path program 2 times [2024-06-21 20:58:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604516278] [2024-06-21 20:58:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:32,587 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 20:58:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604516278] [2024-06-21 20:58:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604516278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:32,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:32,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:32,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708801842] [2024-06-21 20:58:32,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:32,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:32,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:32,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:32,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:32,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:32,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1526 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:32,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:32,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:32,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:33,421 INFO L124 PetriNetUnfolderBase]: 3104/4737 cut-off events. [2024-06-21 20:58:33,421 INFO L125 PetriNetUnfolderBase]: For 270020/270020 co-relation queries the response was YES. [2024-06-21 20:58:33,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36258 conditions, 4737 events. 3104/4737 cut-off events. For 270020/270020 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 24431 event pairs, 828 based on Foata normal form. 4/4735 useless extension candidates. Maximal degree in co-relation 36197. Up to 4033 conditions per place. [2024-06-21 20:58:33,459 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 141 selfloop transitions, 64 changer transitions 0/212 dead transitions. [2024-06-21 20:58:33,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 212 transitions, 2542 flow [2024-06-21 20:58:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:58:33,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-21 20:58:33,460 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1526 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:58:33,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 212 transitions, 2542 flow [2024-06-21 20:58:33,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 212 transitions, 2403 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:33,557 INFO L231 Difference]: Finished difference. Result has 144 places, 175 transitions, 1820 flow [2024-06-21 20:58:33,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1820, PETRI_PLACES=144, PETRI_TRANSITIONS=175} [2024-06-21 20:58:33,557 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 99 predicate places. [2024-06-21 20:58:33,557 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 175 transitions, 1820 flow [2024-06-21 20:58:33,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:33,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:33,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:33,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:58:33,557 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:33,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash 740280751, now seen corresponding path program 3 times [2024-06-21 20:58:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828720601] [2024-06-21 20:58:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:34,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:34,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828720601] [2024-06-21 20:58:34,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828720601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:34,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:34,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471972427] [2024-06-21 20:58:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:34,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:34,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:34,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:34,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 175 transitions, 1820 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:34,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:34,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:34,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:35,461 INFO L124 PetriNetUnfolderBase]: 3122/4775 cut-off events. [2024-06-21 20:58:35,461 INFO L125 PetriNetUnfolderBase]: For 290900/290900 co-relation queries the response was YES. [2024-06-21 20:58:35,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38118 conditions, 4775 events. 3122/4775 cut-off events. For 290900/290900 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 24758 event pairs, 806 based on Foata normal form. 8/4777 useless extension candidates. Maximal degree in co-relation 38054. Up to 4042 conditions per place. [2024-06-21 20:58:35,494 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 134 selfloop transitions, 74 changer transitions 0/215 dead transitions. [2024-06-21 20:58:35,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 2702 flow [2024-06-21 20:58:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:58:35,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-21 20:58:35,496 INFO L175 Difference]: Start difference. First operand has 144 places, 175 transitions, 1820 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:58:35,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 2702 flow [2024-06-21 20:58:35,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 215 transitions, 2594 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:35,608 INFO L231 Difference]: Finished difference. Result has 149 places, 178 transitions, 1956 flow [2024-06-21 20:58:35,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1956, PETRI_PLACES=149, PETRI_TRANSITIONS=178} [2024-06-21 20:58:35,608 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 104 predicate places. [2024-06-21 20:58:35,609 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 178 transitions, 1956 flow [2024-06-21 20:58:35,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:35,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:35,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:35,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:58:35,609 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:35,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:35,609 INFO L85 PathProgramCache]: Analyzing trace with hash 509255757, now seen corresponding path program 4 times [2024-06-21 20:58:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:35,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329404964] [2024-06-21 20:58:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:35,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:36,496 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 20:58:36,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:36,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329404964] [2024-06-21 20:58:36,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329404964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:36,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:36,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:36,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45756715] [2024-06-21 20:58:36,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:36,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:36,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:36,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:36,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:36,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 178 transitions, 1956 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:36,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:36,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:36,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:37,425 INFO L124 PetriNetUnfolderBase]: 3112/4761 cut-off events. [2024-06-21 20:58:37,425 INFO L125 PetriNetUnfolderBase]: For 299133/299133 co-relation queries the response was YES. [2024-06-21 20:58:37,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38488 conditions, 4761 events. 3112/4761 cut-off events. For 299133/299133 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 24651 event pairs, 809 based on Foata normal form. 4/4759 useless extension candidates. Maximal degree in co-relation 38422. Up to 4038 conditions per place. [2024-06-21 20:58:37,463 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 136 selfloop transitions, 70 changer transitions 0/213 dead transitions. [2024-06-21 20:58:37,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 213 transitions, 2614 flow [2024-06-21 20:58:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:58:37,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 20:58:37,464 INFO L175 Difference]: Start difference. First operand has 149 places, 178 transitions, 1956 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:58:37,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 213 transitions, 2614 flow [2024-06-21 20:58:37,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 213 transitions, 2354 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:37,616 INFO L231 Difference]: Finished difference. Result has 152 places, 178 transitions, 1844 flow [2024-06-21 20:58:37,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1844, PETRI_PLACES=152, PETRI_TRANSITIONS=178} [2024-06-21 20:58:37,617 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-21 20:58:37,617 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 178 transitions, 1844 flow [2024-06-21 20:58:37,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:37,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:37,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:37,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:58:37,618 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:37,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:37,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1223897630, now seen corresponding path program 1 times [2024-06-21 20:58:37,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:37,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070356871] [2024-06-21 20:58:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:37,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:38,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:38,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070356871] [2024-06-21 20:58:38,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070356871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:38,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:38,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:58:38,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319104992] [2024-06-21 20:58:38,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:38,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:58:38,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:38,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:58:38,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:58:38,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:38,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 178 transitions, 1844 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:38,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:38,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:38,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:39,047 INFO L124 PetriNetUnfolderBase]: 3173/4839 cut-off events. [2024-06-21 20:58:39,047 INFO L125 PetriNetUnfolderBase]: For 309636/309641 co-relation queries the response was YES. [2024-06-21 20:58:39,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38487 conditions, 4839 events. 3173/4839 cut-off events. For 309636/309641 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 24651 event pairs, 925 based on Foata normal form. 1/4830 useless extension candidates. Maximal degree in co-relation 38420. Up to 4515 conditions per place. [2024-06-21 20:58:39,086 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 158 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2024-06-21 20:58:39,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 198 transitions, 2384 flow [2024-06-21 20:58:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:58:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:58:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 20:58:39,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 20:58:39,087 INFO L175 Difference]: Start difference. First operand has 152 places, 178 transitions, 1844 flow. Second operand 6 states and 111 transitions. [2024-06-21 20:58:39,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 198 transitions, 2384 flow [2024-06-21 20:58:39,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 198 transitions, 2260 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:39,247 INFO L231 Difference]: Finished difference. Result has 151 places, 184 transitions, 1847 flow [2024-06-21 20:58:39,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1847, PETRI_PLACES=151, PETRI_TRANSITIONS=184} [2024-06-21 20:58:39,248 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-21 20:58:39,248 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 184 transitions, 1847 flow [2024-06-21 20:58:39,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:39,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:39,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:39,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:58:39,248 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:39,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:39,248 INFO L85 PathProgramCache]: Analyzing trace with hash -606888579, now seen corresponding path program 5 times [2024-06-21 20:58:39,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:39,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189311712] [2024-06-21 20:58:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:40,203 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 20:58:40,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:40,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189311712] [2024-06-21 20:58:40,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189311712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:40,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:40,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:40,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630580502] [2024-06-21 20:58:40,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:40,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:40,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:40,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:40,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:40,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:40,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 184 transitions, 1847 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:40,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:40,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:40,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:41,013 INFO L124 PetriNetUnfolderBase]: 3249/4945 cut-off events. [2024-06-21 20:58:41,013 INFO L125 PetriNetUnfolderBase]: For 332852/332858 co-relation queries the response was YES. [2024-06-21 20:58:41,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40362 conditions, 4945 events. 3249/4945 cut-off events. For 332852/332858 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 25634 event pairs, 776 based on Foata normal form. 16/4942 useless extension candidates. Maximal degree in co-relation 40294. Up to 3825 conditions per place. [2024-06-21 20:58:41,056 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 114 selfloop transitions, 113 changer transitions 0/234 dead transitions. [2024-06-21 20:58:41,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 234 transitions, 3127 flow [2024-06-21 20:58:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:58:41,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 20:58:41,057 INFO L175 Difference]: Start difference. First operand has 151 places, 184 transitions, 1847 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:58:41,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 234 transitions, 3127 flow [2024-06-21 20:58:41,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 234 transitions, 3086 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 20:58:41,229 INFO L231 Difference]: Finished difference. Result has 159 places, 195 transitions, 2318 flow [2024-06-21 20:58:41,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2318, PETRI_PLACES=159, PETRI_TRANSITIONS=195} [2024-06-21 20:58:41,230 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-21 20:58:41,230 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 195 transitions, 2318 flow [2024-06-21 20:58:41,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:41,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:41,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:41,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:58:41,230 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:41,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -828770769, now seen corresponding path program 6 times [2024-06-21 20:58:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149357481] [2024-06-21 20:58:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:42,185 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 20:58:42,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:42,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149357481] [2024-06-21 20:58:42,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149357481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:42,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:42,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:42,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008304620] [2024-06-21 20:58:42,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:42,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:42,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:42,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 195 transitions, 2318 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:42,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:42,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:42,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:43,050 INFO L124 PetriNetUnfolderBase]: 3358/5108 cut-off events. [2024-06-21 20:58:43,050 INFO L125 PetriNetUnfolderBase]: For 362955/362971 co-relation queries the response was YES. [2024-06-21 20:58:43,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44165 conditions, 5108 events. 3358/5108 cut-off events. For 362955/362971 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 26710 event pairs, 852 based on Foata normal form. 8/5094 useless extension candidates. Maximal degree in co-relation 44094. Up to 3898 conditions per place. [2024-06-21 20:58:43,096 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 123 selfloop transitions, 115 changer transitions 0/245 dead transitions. [2024-06-21 20:58:43,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 245 transitions, 3666 flow [2024-06-21 20:58:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 20:58:43,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-21 20:58:43,097 INFO L175 Difference]: Start difference. First operand has 159 places, 195 transitions, 2318 flow. Second operand 9 states and 182 transitions. [2024-06-21 20:58:43,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 245 transitions, 3666 flow [2024-06-21 20:58:43,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 245 transitions, 3431 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:43,351 INFO L231 Difference]: Finished difference. Result has 166 places, 206 transitions, 2650 flow [2024-06-21 20:58:43,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2650, PETRI_PLACES=166, PETRI_TRANSITIONS=206} [2024-06-21 20:58:43,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-21 20:58:43,352 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 206 transitions, 2650 flow [2024-06-21 20:58:43,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:43,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:43,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:43,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:58:43,353 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:43,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash -607119219, now seen corresponding path program 7 times [2024-06-21 20:58:43,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:43,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372840029] [2024-06-21 20:58:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:43,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:44,308 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 20:58:44,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:44,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372840029] [2024-06-21 20:58:44,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372840029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:44,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:44,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:44,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197821387] [2024-06-21 20:58:44,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:44,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:44,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:44,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:44,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:44,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 206 transitions, 2650 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:44,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:44,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:44,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:45,301 INFO L124 PetriNetUnfolderBase]: 3369/5129 cut-off events. [2024-06-21 20:58:45,301 INFO L125 PetriNetUnfolderBase]: For 376836/376842 co-relation queries the response was YES. [2024-06-21 20:58:45,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44793 conditions, 5129 events. 3369/5129 cut-off events. For 376836/376842 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 26810 event pairs, 802 based on Foata normal form. 12/5123 useless extension candidates. Maximal degree in co-relation 44718. Up to 3907 conditions per place. [2024-06-21 20:58:45,344 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 127 selfloop transitions, 111 changer transitions 0/245 dead transitions. [2024-06-21 20:58:45,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 245 transitions, 3730 flow [2024-06-21 20:58:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 20:58:45,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 20:58:45,345 INFO L175 Difference]: Start difference. First operand has 166 places, 206 transitions, 2650 flow. Second operand 9 states and 183 transitions. [2024-06-21 20:58:45,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 245 transitions, 3730 flow [2024-06-21 20:58:45,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 245 transitions, 3438 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:45,560 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 2592 flow [2024-06-21 20:58:45,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2592, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-21 20:58:45,561 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-21 20:58:45,561 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 2592 flow [2024-06-21 20:58:45,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:45,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:45,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:45,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:58:45,561 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:45,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash -835026879, now seen corresponding path program 8 times [2024-06-21 20:58:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:45,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260371947] [2024-06-21 20:58:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:45,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:46,506 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 20:58:46,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:46,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260371947] [2024-06-21 20:58:46,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260371947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:46,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:46,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419039952] [2024-06-21 20:58:46,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:46,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:46,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:46,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:46,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:46,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 2592 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:46,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:46,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:46,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:47,529 INFO L124 PetriNetUnfolderBase]: 3455/5263 cut-off events. [2024-06-21 20:58:47,529 INFO L125 PetriNetUnfolderBase]: For 397987/397993 co-relation queries the response was YES. [2024-06-21 20:58:47,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46004 conditions, 5263 events. 3455/5263 cut-off events. For 397987/397993 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 27732 event pairs, 828 based on Foata normal form. 8/5253 useless extension candidates. Maximal degree in co-relation 45928. Up to 3956 conditions per place. [2024-06-21 20:58:47,577 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 137 selfloop transitions, 111 changer transitions 0/255 dead transitions. [2024-06-21 20:58:47,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 255 transitions, 4075 flow [2024-06-21 20:58:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 20:58:47,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 20:58:47,578 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 2592 flow. Second operand 9 states and 187 transitions. [2024-06-21 20:58:47,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 255 transitions, 4075 flow [2024-06-21 20:58:47,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 255 transitions, 3884 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:47,814 INFO L231 Difference]: Finished difference. Result has 175 places, 214 transitions, 2874 flow [2024-06-21 20:58:47,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2874, PETRI_PLACES=175, PETRI_TRANSITIONS=214} [2024-06-21 20:58:47,814 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-21 20:58:47,814 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 214 transitions, 2874 flow [2024-06-21 20:58:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:47,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:47,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:47,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:58:47,815 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:47,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash -835020369, now seen corresponding path program 9 times [2024-06-21 20:58:47,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:47,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115988873] [2024-06-21 20:58:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:47,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:48,758 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 20:58:48,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115988873] [2024-06-21 20:58:48,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115988873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:48,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:48,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:48,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188882636] [2024-06-21 20:58:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:48,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:48,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:48,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:48,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 214 transitions, 2874 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:48,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:48,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:48,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:49,717 INFO L124 PetriNetUnfolderBase]: 3416/5206 cut-off events. [2024-06-21 20:58:49,717 INFO L125 PetriNetUnfolderBase]: For 417738/417754 co-relation queries the response was YES. [2024-06-21 20:58:49,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46523 conditions, 5206 events. 3416/5206 cut-off events. For 417738/417754 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 27452 event pairs, 877 based on Foata normal form. 12/5196 useless extension candidates. Maximal degree in co-relation 46445. Up to 3939 conditions per place. [2024-06-21 20:58:49,766 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 135 selfloop transitions, 111 changer transitions 0/253 dead transitions. [2024-06-21 20:58:49,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 253 transitions, 3998 flow [2024-06-21 20:58:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 20:58:49,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-21 20:58:49,767 INFO L175 Difference]: Start difference. First operand has 175 places, 214 transitions, 2874 flow. Second operand 9 states and 184 transitions. [2024-06-21 20:58:49,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 253 transitions, 3998 flow [2024-06-21 20:58:50,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 253 transitions, 3475 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-21 20:58:50,066 INFO L231 Difference]: Finished difference. Result has 176 places, 214 transitions, 2583 flow [2024-06-21 20:58:50,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2583, PETRI_PLACES=176, PETRI_TRANSITIONS=214} [2024-06-21 20:58:50,066 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-21 20:58:50,066 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 2583 flow [2024-06-21 20:58:50,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:50,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:50,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:50,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:58:50,067 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:50,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:50,067 INFO L85 PathProgramCache]: Analyzing trace with hash -835204819, now seen corresponding path program 4 times [2024-06-21 20:58:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:50,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439551325] [2024-06-21 20:58:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:50,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:51,234 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 20:58:51,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:51,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439551325] [2024-06-21 20:58:51,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439551325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:51,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:51,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:51,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903936171] [2024-06-21 20:58:51,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:51,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:51,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:51,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:51,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 214 transitions, 2583 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:58:51,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:51,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:51,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:52,192 INFO L124 PetriNetUnfolderBase]: 3232/5002 cut-off events. [2024-06-21 20:58:52,193 INFO L125 PetriNetUnfolderBase]: For 420850/420871 co-relation queries the response was YES. [2024-06-21 20:58:52,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44686 conditions, 5002 events. 3232/5002 cut-off events. For 420850/420871 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 26868 event pairs, 797 based on Foata normal form. 8/4971 useless extension candidates. Maximal degree in co-relation 44608. Up to 4426 conditions per place. [2024-06-21 20:58:52,241 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 171 selfloop transitions, 50 changer transitions 0/242 dead transitions. [2024-06-21 20:58:52,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 242 transitions, 3166 flow [2024-06-21 20:58:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:58:52,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-21 20:58:52,242 INFO L175 Difference]: Start difference. First operand has 176 places, 214 transitions, 2583 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:58:52,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 242 transitions, 3166 flow [2024-06-21 20:58:52,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 242 transitions, 2897 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:58:52,502 INFO L231 Difference]: Finished difference. Result has 177 places, 216 transitions, 2495 flow [2024-06-21 20:58:52,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2495, PETRI_PLACES=177, PETRI_TRANSITIONS=216} [2024-06-21 20:58:52,503 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-21 20:58:52,503 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 216 transitions, 2495 flow [2024-06-21 20:58:52,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:58:52,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:52,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:52,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:58:52,503 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:52,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash -835199859, now seen corresponding path program 10 times [2024-06-21 20:58:52,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:52,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22132927] [2024-06-21 20:58:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:52,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:53,435 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 20:58:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:53,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22132927] [2024-06-21 20:58:53,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22132927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:53,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:53,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:53,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535984949] [2024-06-21 20:58:53,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:53,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:53,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:53,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:53,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:53,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 216 transitions, 2495 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:53,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:53,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:53,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:54,382 INFO L124 PetriNetUnfolderBase]: 3423/5219 cut-off events. [2024-06-21 20:58:54,382 INFO L125 PetriNetUnfolderBase]: For 432854/432860 co-relation queries the response was YES. [2024-06-21 20:58:54,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45604 conditions, 5219 events. 3423/5219 cut-off events. For 432854/432860 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 27496 event pairs, 810 based on Foata normal form. 8/5209 useless extension candidates. Maximal degree in co-relation 45525. Up to 3936 conditions per place. [2024-06-21 20:58:54,431 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 126 selfloop transitions, 122 changer transitions 0/255 dead transitions. [2024-06-21 20:58:54,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 255 transitions, 3535 flow [2024-06-21 20:58:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:58:54,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 20:58:54,434 INFO L175 Difference]: Start difference. First operand has 177 places, 216 transitions, 2495 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:58:54,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 255 transitions, 3535 flow [2024-06-21 20:58:54,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 255 transitions, 3372 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:54,675 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 2672 flow [2024-06-21 20:58:54,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2672, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2024-06-21 20:58:54,675 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-21 20:58:54,675 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 2672 flow [2024-06-21 20:58:54,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:54,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:54,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:54,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:58:54,676 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:54,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1195743740, now seen corresponding path program 2 times [2024-06-21 20:58:54,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:54,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063956017] [2024-06-21 20:58:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:54,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:55,277 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 20:58:55,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:55,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063956017] [2024-06-21 20:58:55,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063956017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:55,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:55,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:58:55,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536159560] [2024-06-21 20:58:55,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:55,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:58:55,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:58:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:58:55,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:55,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 2672 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:55,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:55,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:55,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:56,203 INFO L124 PetriNetUnfolderBase]: 3519/5333 cut-off events. [2024-06-21 20:58:56,203 INFO L125 PetriNetUnfolderBase]: For 453537/453564 co-relation queries the response was YES. [2024-06-21 20:58:56,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46300 conditions, 5333 events. 3519/5333 cut-off events. For 453537/453564 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 27593 event pairs, 944 based on Foata normal form. 9/5311 useless extension candidates. Maximal degree in co-relation 46220. Up to 5025 conditions per place. [2024-06-21 20:58:56,253 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 188 selfloop transitions, 20 changer transitions 0/227 dead transitions. [2024-06-21 20:58:56,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 227 transitions, 3108 flow [2024-06-21 20:58:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:58:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:58:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 20:58:56,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-21 20:58:56,257 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 2672 flow. Second operand 6 states and 104 transitions. [2024-06-21 20:58:56,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 227 transitions, 3108 flow [2024-06-21 20:58:56,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 227 transitions, 2811 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:56,522 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 2421 flow [2024-06-21 20:58:56,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2421, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2024-06-21 20:58:56,523 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-21 20:58:56,523 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 2421 flow [2024-06-21 20:58:56,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:56,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:56,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:56,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:58:56,523 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:56,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1053990999, now seen corresponding path program 2 times [2024-06-21 20:58:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:56,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909549181] [2024-06-21 20:58:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:56,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:57,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909549181] [2024-06-21 20:58:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909549181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:57,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:57,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:57,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865486781] [2024-06-21 20:58:57,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:57,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:57,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:57,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:57,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:57,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:57,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 2421 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:57,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:57,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:57,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:58,603 INFO L124 PetriNetUnfolderBase]: 3579/5449 cut-off events. [2024-06-21 20:58:58,604 INFO L125 PetriNetUnfolderBase]: For 464188/464192 co-relation queries the response was YES. [2024-06-21 20:58:58,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47567 conditions, 5449 events. 3579/5449 cut-off events. For 464188/464192 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 28742 event pairs, 867 based on Foata normal form. 6/5446 useless extension candidates. Maximal degree in co-relation 47486. Up to 5002 conditions per place. [2024-06-21 20:58:58,655 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 221 selfloop transitions, 67 changer transitions 0/295 dead transitions. [2024-06-21 20:58:58,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 295 transitions, 3680 flow [2024-06-21 20:58:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:58:58,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-21 20:58:58,656 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 2421 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:58:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 295 transitions, 3680 flow [2024-06-21 20:58:59,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 295 transitions, 3614 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:59,013 INFO L231 Difference]: Finished difference. Result has 186 places, 262 transitions, 3196 flow [2024-06-21 20:58:59,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3196, PETRI_PLACES=186, PETRI_TRANSITIONS=262} [2024-06-21 20:58:59,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-21 20:58:59,013 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 262 transitions, 3196 flow [2024-06-21 20:58:59,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:59,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:59,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:59,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:58:59,014 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:59,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash -659987995, now seen corresponding path program 3 times [2024-06-21 20:58:59,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:59,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062643686] [2024-06-21 20:58:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:59,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:59,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062643686] [2024-06-21 20:58:59,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062643686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:59,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:59,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207288749] [2024-06-21 20:58:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:59,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:00,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:00,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 262 transitions, 3196 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:00,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:00,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:00,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:01,081 INFO L124 PetriNetUnfolderBase]: 3672/5584 cut-off events. [2024-06-21 20:59:01,081 INFO L125 PetriNetUnfolderBase]: For 482016/482024 co-relation queries the response was YES. [2024-06-21 20:59:01,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49513 conditions, 5584 events. 3672/5584 cut-off events. For 482016/482024 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 29556 event pairs, 870 based on Foata normal form. 10/5585 useless extension candidates. Maximal degree in co-relation 49428. Up to 5095 conditions per place. [2024-06-21 20:59:01,132 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 233 selfloop transitions, 86 changer transitions 0/326 dead transitions. [2024-06-21 20:59:01,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 326 transitions, 4434 flow [2024-06-21 20:59:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:59:01,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 20:59:01,134 INFO L175 Difference]: Start difference. First operand has 186 places, 262 transitions, 3196 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:59:01,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 326 transitions, 4434 flow [2024-06-21 20:59:01,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 326 transitions, 4252 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:01,538 INFO L231 Difference]: Finished difference. Result has 193 places, 293 transitions, 3810 flow [2024-06-21 20:59:01,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3810, PETRI_PLACES=193, PETRI_TRANSITIONS=293} [2024-06-21 20:59:01,539 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-21 20:59:01,539 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 293 transitions, 3810 flow [2024-06-21 20:59:01,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:01,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:01,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:01,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:59:01,539 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:01,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1116153650, now seen corresponding path program 1 times [2024-06-21 20:59:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:01,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800143425] [2024-06-21 20:59:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:02,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:02,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800143425] [2024-06-21 20:59:02,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800143425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:02,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:02,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:02,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334262047] [2024-06-21 20:59:02,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:02,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:02,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:02,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:02,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:02,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 293 transitions, 3810 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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 20:59:02,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:02,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:02,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:03,217 INFO L124 PetriNetUnfolderBase]: 3460/5370 cut-off events. [2024-06-21 20:59:03,217 INFO L125 PetriNetUnfolderBase]: For 441915/441930 co-relation queries the response was YES. [2024-06-21 20:59:03,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45608 conditions, 5370 events. 3460/5370 cut-off events. For 441915/441930 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 28869 event pairs, 939 based on Foata normal form. 1/5337 useless extension candidates. Maximal degree in co-relation 45521. Up to 4911 conditions per place. [2024-06-21 20:59:03,264 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 265 selfloop transitions, 18 changer transitions 0/311 dead transitions. [2024-06-21 20:59:03,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 311 transitions, 4598 flow [2024-06-21 20:59:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:59:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:59:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 20:59:03,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-21 20:59:03,265 INFO L175 Difference]: Start difference. First operand has 193 places, 293 transitions, 3810 flow. Second operand 7 states and 124 transitions. [2024-06-21 20:59:03,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 311 transitions, 4598 flow [2024-06-21 20:59:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 311 transitions, 4282 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 20:59:03,626 INFO L231 Difference]: Finished difference. Result has 191 places, 299 transitions, 3630 flow [2024-06-21 20:59:03,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3630, PETRI_PLACES=191, PETRI_TRANSITIONS=299} [2024-06-21 20:59:03,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-21 20:59:03,626 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 299 transitions, 3630 flow [2024-06-21 20:59:03,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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 20:59:03,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:03,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:03,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:59:03,627 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:03,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1158829490, now seen corresponding path program 2 times [2024-06-21 20:59:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:03,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299631818] [2024-06-21 20:59:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:03,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:04,317 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 20:59:04,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:04,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299631818] [2024-06-21 20:59:04,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299631818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:04,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:04,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:04,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303717153] [2024-06-21 20:59:04,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:04,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:04,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:04,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:04,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:04,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:04,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 299 transitions, 3630 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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 20:59:04,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:04,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:04,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:05,299 INFO L124 PetriNetUnfolderBase]: 3457/5366 cut-off events. [2024-06-21 20:59:05,299 INFO L125 PetriNetUnfolderBase]: For 455128/455143 co-relation queries the response was YES. [2024-06-21 20:59:05,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45819 conditions, 5366 events. 3457/5366 cut-off events. For 455128/455143 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 28815 event pairs, 938 based on Foata normal form. 1/5333 useless extension candidates. Maximal degree in co-relation 45732. Up to 4920 conditions per place. [2024-06-21 20:59:05,349 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 267 selfloop transitions, 12 changer transitions 0/307 dead transitions. [2024-06-21 20:59:05,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 307 transitions, 4212 flow [2024-06-21 20:59:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:59:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:59:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 20:59:05,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053030303030303 [2024-06-21 20:59:05,350 INFO L175 Difference]: Start difference. First operand has 191 places, 299 transitions, 3630 flow. Second operand 6 states and 107 transitions. [2024-06-21 20:59:05,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 307 transitions, 4212 flow [2024-06-21 20:59:05,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 307 transitions, 4129 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 20:59:05,785 INFO L231 Difference]: Finished difference. Result has 194 places, 299 transitions, 3577 flow [2024-06-21 20:59:05,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3577, PETRI_PLACES=194, PETRI_TRANSITIONS=299} [2024-06-21 20:59:05,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-21 20:59:05,785 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 299 transitions, 3577 flow [2024-06-21 20:59:05,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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 20:59:05,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:05,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:05,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:59:05,787 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:05,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash -598537179, now seen corresponding path program 1 times [2024-06-21 20:59:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:05,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481876180] [2024-06-21 20:59:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:05,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:07,065 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 20:59:07,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:07,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481876180] [2024-06-21 20:59:07,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481876180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:07,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:07,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:07,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877802596] [2024-06-21 20:59:07,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:07,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:07,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:07,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:07,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 299 transitions, 3577 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:07,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:07,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:07,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:08,268 INFO L124 PetriNetUnfolderBase]: 3625/5543 cut-off events. [2024-06-21 20:59:08,268 INFO L125 PetriNetUnfolderBase]: For 469768/469768 co-relation queries the response was YES. [2024-06-21 20:59:08,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46852 conditions, 5543 events. 3625/5543 cut-off events. For 469768/469768 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 29065 event pairs, 978 based on Foata normal form. 4/5534 useless extension candidates. Maximal degree in co-relation 46763. Up to 5213 conditions per place. [2024-06-21 20:59:08,326 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 303 selfloop transitions, 23 changer transitions 0/332 dead transitions. [2024-06-21 20:59:08,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 332 transitions, 4405 flow [2024-06-21 20:59:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 20:59:08,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931818181818182 [2024-06-21 20:59:08,328 INFO L175 Difference]: Start difference. First operand has 194 places, 299 transitions, 3577 flow. Second operand 10 states and 173 transitions. [2024-06-21 20:59:08,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 332 transitions, 4405 flow [2024-06-21 20:59:08,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 332 transitions, 4373 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:08,695 INFO L231 Difference]: Finished difference. Result has 199 places, 301 transitions, 3672 flow [2024-06-21 20:59:08,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3545, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3672, PETRI_PLACES=199, PETRI_TRANSITIONS=301} [2024-06-21 20:59:08,695 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-21 20:59:08,696 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 301 transitions, 3672 flow [2024-06-21 20:59:08,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:08,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:08,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:08,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:59:08,696 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:08,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -78699368, now seen corresponding path program 1 times [2024-06-21 20:59:08,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:08,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576854970] [2024-06-21 20:59:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:09,384 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 20:59:09,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576854970] [2024-06-21 20:59:09,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576854970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:09,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:09,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:09,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649570692] [2024-06-21 20:59:09,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:09,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:09,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:09,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:09,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 301 transitions, 3672 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:59:09,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:09,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:09,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:10,493 INFO L124 PetriNetUnfolderBase]: 3645/5554 cut-off events. [2024-06-21 20:59:10,493 INFO L125 PetriNetUnfolderBase]: For 488999/489014 co-relation queries the response was YES. [2024-06-21 20:59:10,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47578 conditions, 5554 events. 3645/5554 cut-off events. For 488999/489014 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 29024 event pairs, 996 based on Foata normal form. 2/5532 useless extension candidates. Maximal degree in co-relation 47488. Up to 5235 conditions per place. [2024-06-21 20:59:10,546 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 273 selfloop transitions, 15 changer transitions 0/314 dead transitions. [2024-06-21 20:59:10,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 314 transitions, 4314 flow [2024-06-21 20:59:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:59:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:59:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 20:59:10,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-21 20:59:10,547 INFO L175 Difference]: Start difference. First operand has 199 places, 301 transitions, 3672 flow. Second operand 7 states and 116 transitions. [2024-06-21 20:59:10,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 314 transitions, 4314 flow [2024-06-21 20:59:10,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 314 transitions, 4205 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:10,926 INFO L231 Difference]: Finished difference. Result has 198 places, 304 transitions, 3643 flow [2024-06-21 20:59:10,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3643, PETRI_PLACES=198, PETRI_TRANSITIONS=304} [2024-06-21 20:59:10,927 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-21 20:59:10,927 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 304 transitions, 3643 flow [2024-06-21 20:59:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:59:10,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:10,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:10,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:59:10,927 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:10,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash 948170097, now seen corresponding path program 1 times [2024-06-21 20:59:10,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:10,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904722569] [2024-06-21 20:59:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:12,031 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 20:59:12,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:12,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904722569] [2024-06-21 20:59:12,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904722569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:12,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:12,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:12,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116106316] [2024-06-21 20:59:12,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:12,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:12,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:12,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:12,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 304 transitions, 3643 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:12,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:12,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:12,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:13,323 INFO L124 PetriNetUnfolderBase]: 3680/5602 cut-off events. [2024-06-21 20:59:13,323 INFO L125 PetriNetUnfolderBase]: For 564662/564666 co-relation queries the response was YES. [2024-06-21 20:59:13,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51917 conditions, 5602 events. 3680/5602 cut-off events. For 564662/564666 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 29630 event pairs, 715 based on Foata normal form. 8/5601 useless extension candidates. Maximal degree in co-relation 51826. Up to 5133 conditions per place. [2024-06-21 20:59:13,372 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 279 selfloop transitions, 53 changer transitions 0/339 dead transitions. [2024-06-21 20:59:13,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 339 transitions, 4481 flow [2024-06-21 20:59:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:59:13,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-21 20:59:13,373 INFO L175 Difference]: Start difference. First operand has 198 places, 304 transitions, 3643 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:59:13,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 339 transitions, 4481 flow [2024-06-21 20:59:13,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 339 transitions, 4423 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:13,740 INFO L231 Difference]: Finished difference. Result has 202 places, 306 transitions, 3768 flow [2024-06-21 20:59:13,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3768, PETRI_PLACES=202, PETRI_TRANSITIONS=306} [2024-06-21 20:59:13,741 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-21 20:59:13,741 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 306 transitions, 3768 flow [2024-06-21 20:59:13,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:13,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:13,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:13,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:59:13,742 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:13,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2102399233, now seen corresponding path program 2 times [2024-06-21 20:59:13,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:13,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009807179] [2024-06-21 20:59:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:13,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:14,874 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 20:59:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:14,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009807179] [2024-06-21 20:59:14,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009807179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:14,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:14,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67801112] [2024-06-21 20:59:14,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:14,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:14,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:15,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:15,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 306 transitions, 3768 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:15,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:15,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:15,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:16,206 INFO L124 PetriNetUnfolderBase]: 3722/5662 cut-off events. [2024-06-21 20:59:16,206 INFO L125 PetriNetUnfolderBase]: For 592544/592548 co-relation queries the response was YES. [2024-06-21 20:59:16,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53308 conditions, 5662 events. 3722/5662 cut-off events. For 592544/592548 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 30026 event pairs, 844 based on Foata normal form. 8/5661 useless extension candidates. Maximal degree in co-relation 53216. Up to 4869 conditions per place. [2024-06-21 20:59:16,264 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 225 selfloop transitions, 113 changer transitions 0/345 dead transitions. [2024-06-21 20:59:16,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 345 transitions, 4896 flow [2024-06-21 20:59:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:59:16,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-21 20:59:16,265 INFO L175 Difference]: Start difference. First operand has 202 places, 306 transitions, 3768 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:59:16,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 345 transitions, 4896 flow [2024-06-21 20:59:16,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 345 transitions, 4731 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:16,845 INFO L231 Difference]: Finished difference. Result has 204 places, 310 transitions, 3980 flow [2024-06-21 20:59:16,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3980, PETRI_PLACES=204, PETRI_TRANSITIONS=310} [2024-06-21 20:59:16,846 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-21 20:59:16,846 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 310 transitions, 3980 flow [2024-06-21 20:59:16,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:16,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:16,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:16,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:59:16,846 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:16,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2102402953, now seen corresponding path program 3 times [2024-06-21 20:59:16,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:16,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707334003] [2024-06-21 20:59:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:16,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:18,001 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 20:59:18,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:18,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707334003] [2024-06-21 20:59:18,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707334003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:18,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:18,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:18,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862592721] [2024-06-21 20:59:18,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:18,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:18,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:18,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:18,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:18,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 310 transitions, 3980 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:18,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:18,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:18,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:19,294 INFO L124 PetriNetUnfolderBase]: 3714/5650 cut-off events. [2024-06-21 20:59:19,294 INFO L125 PetriNetUnfolderBase]: For 612059/612063 co-relation queries the response was YES. [2024-06-21 20:59:19,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53682 conditions, 5650 events. 3714/5650 cut-off events. For 612059/612063 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 29945 event pairs, 823 based on Foata normal form. 8/5649 useless extension candidates. Maximal degree in co-relation 53589. Up to 4947 conditions per place. [2024-06-21 20:59:19,353 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 215 selfloop transitions, 121 changer transitions 0/343 dead transitions. [2024-06-21 20:59:19,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 343 transitions, 4764 flow [2024-06-21 20:59:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:59:19,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-21 20:59:19,355 INFO L175 Difference]: Start difference. First operand has 204 places, 310 transitions, 3980 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:59:19,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 343 transitions, 4764 flow [2024-06-21 20:59:19,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 343 transitions, 4508 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:19,964 INFO L231 Difference]: Finished difference. Result has 208 places, 310 transitions, 3984 flow [2024-06-21 20:59:19,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3724, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3984, PETRI_PLACES=208, PETRI_TRANSITIONS=310} [2024-06-21 20:59:19,964 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-21 20:59:19,964 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 310 transitions, 3984 flow [2024-06-21 20:59:19,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:19,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:19,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:19,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:59:19,965 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:19,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2109447298, now seen corresponding path program 1 times [2024-06-21 20:59:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:19,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289812436] [2024-06-21 20:59:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:21,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289812436] [2024-06-21 20:59:21,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289812436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:21,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:21,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742092033] [2024-06-21 20:59:21,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:21,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:21,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 310 transitions, 3984 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:21,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:21,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:21,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:22,259 INFO L124 PetriNetUnfolderBase]: 3711/5645 cut-off events. [2024-06-21 20:59:22,259 INFO L125 PetriNetUnfolderBase]: For 623853/623857 co-relation queries the response was YES. [2024-06-21 20:59:22,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54005 conditions, 5645 events. 3711/5645 cut-off events. For 623853/623857 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 29859 event pairs, 802 based on Foata normal form. 6/5642 useless extension candidates. Maximal degree in co-relation 53910. Up to 4914 conditions per place. [2024-06-21 20:59:22,321 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 214 selfloop transitions, 125 changer transitions 0/346 dead transitions. [2024-06-21 20:59:22,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 346 transitions, 4866 flow [2024-06-21 20:59:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:59:22,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-21 20:59:22,322 INFO L175 Difference]: Start difference. First operand has 208 places, 310 transitions, 3984 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:59:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 346 transitions, 4866 flow [2024-06-21 20:59:22,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 346 transitions, 4608 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:22,911 INFO L231 Difference]: Finished difference. Result has 209 places, 313 transitions, 4094 flow [2024-06-21 20:59:22,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4094, PETRI_PLACES=209, PETRI_TRANSITIONS=313} [2024-06-21 20:59:22,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 164 predicate places. [2024-06-21 20:59:22,911 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 313 transitions, 4094 flow [2024-06-21 20:59:22,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:22,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:22,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:59:22,912 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:22,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1468153737, now seen corresponding path program 4 times [2024-06-21 20:59:22,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:22,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152312826] [2024-06-21 20:59:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:24,075 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 20:59:24,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:24,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152312826] [2024-06-21 20:59:24,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152312826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:24,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:24,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:24,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917055843] [2024-06-21 20:59:24,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:24,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:24,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:24,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:24,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 313 transitions, 4094 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:24,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:24,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:24,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:25,343 INFO L124 PetriNetUnfolderBase]: 3728/5674 cut-off events. [2024-06-21 20:59:25,343 INFO L125 PetriNetUnfolderBase]: For 651564/651564 co-relation queries the response was YES. [2024-06-21 20:59:25,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54870 conditions, 5674 events. 3728/5674 cut-off events. For 651564/651564 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 30082 event pairs, 828 based on Foata normal form. 4/5669 useless extension candidates. Maximal degree in co-relation 54774. Up to 4927 conditions per place. [2024-06-21 20:59:25,403 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 221 selfloop transitions, 119 changer transitions 0/347 dead transitions. [2024-06-21 20:59:25,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 347 transitions, 4958 flow [2024-06-21 20:59:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:59:25,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 20:59:25,404 INFO L175 Difference]: Start difference. First operand has 209 places, 313 transitions, 4094 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:59:25,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 347 transitions, 4958 flow [2024-06-21 20:59:25,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 347 transitions, 4658 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:25,991 INFO L231 Difference]: Finished difference. Result has 211 places, 315 transitions, 4117 flow [2024-06-21 20:59:25,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4117, PETRI_PLACES=211, PETRI_TRANSITIONS=315} [2024-06-21 20:59:25,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-21 20:59:25,992 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 315 transitions, 4117 flow [2024-06-21 20:59:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:25,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:25,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:25,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:59:25,993 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:25,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1468150017, now seen corresponding path program 5 times [2024-06-21 20:59:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:25,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552076688] [2024-06-21 20:59:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:25,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:27,142 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 20:59:27,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552076688] [2024-06-21 20:59:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552076688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:27,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:27,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660596547] [2024-06-21 20:59:27,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:27,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:27,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:27,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 315 transitions, 4117 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:27,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:27,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:27,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:28,319 INFO L124 PetriNetUnfolderBase]: 3766/5744 cut-off events. [2024-06-21 20:59:28,320 INFO L125 PetriNetUnfolderBase]: For 686566/686566 co-relation queries the response was YES. [2024-06-21 20:59:28,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56227 conditions, 5744 events. 3766/5744 cut-off events. For 686566/686566 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 30529 event pairs, 826 based on Foata normal form. 4/5743 useless extension candidates. Maximal degree in co-relation 56130. Up to 4920 conditions per place. [2024-06-21 20:59:28,381 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 222 selfloop transitions, 124 changer transitions 0/353 dead transitions. [2024-06-21 20:59:28,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 353 transitions, 5291 flow [2024-06-21 20:59:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:59:28,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-21 20:59:28,382 INFO L175 Difference]: Start difference. First operand has 211 places, 315 transitions, 4117 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:59:28,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 353 transitions, 5291 flow [2024-06-21 20:59:29,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 4986 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:29,021 INFO L231 Difference]: Finished difference. Result has 213 places, 319 transitions, 4227 flow [2024-06-21 20:59:29,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4227, PETRI_PLACES=213, PETRI_TRANSITIONS=319} [2024-06-21 20:59:29,021 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-21 20:59:29,021 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 319 transitions, 4227 flow [2024-06-21 20:59:29,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:29,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:29,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:29,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:59:29,022 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:29,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1473660267, now seen corresponding path program 6 times [2024-06-21 20:59:29,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:29,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901091788] [2024-06-21 20:59:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:30,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:30,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901091788] [2024-06-21 20:59:30,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901091788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:30,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:30,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597070385] [2024-06-21 20:59:30,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:30,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:30,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:30,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:30,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 319 transitions, 4227 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:30,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:30,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:30,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:31,497 INFO L124 PetriNetUnfolderBase]: 3758/5727 cut-off events. [2024-06-21 20:59:31,497 INFO L125 PetriNetUnfolderBase]: For 702841/702841 co-relation queries the response was YES. [2024-06-21 20:59:31,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56320 conditions, 5727 events. 3758/5727 cut-off events. For 702841/702841 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 30401 event pairs, 800 based on Foata normal form. 4/5721 useless extension candidates. Maximal degree in co-relation 56222. Up to 4973 conditions per place. [2024-06-21 20:59:31,559 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 213 selfloop transitions, 131 changer transitions 0/351 dead transitions. [2024-06-21 20:59:31,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 351 transitions, 5025 flow [2024-06-21 20:59:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:59:31,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-21 20:59:31,560 INFO L175 Difference]: Start difference. First operand has 213 places, 319 transitions, 4227 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:59:31,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 351 transitions, 5025 flow [2024-06-21 20:59:32,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 351 transitions, 4747 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:32,159 INFO L231 Difference]: Finished difference. Result has 217 places, 319 transitions, 4218 flow [2024-06-21 20:59:32,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3949, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4218, PETRI_PLACES=217, PETRI_TRANSITIONS=319} [2024-06-21 20:59:32,160 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-21 20:59:32,160 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 319 transitions, 4218 flow [2024-06-21 20:59:32,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:32,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:32,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:32,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:59:32,160 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:32,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1473875748, now seen corresponding path program 1 times [2024-06-21 20:59:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35537576] [2024-06-21 20:59:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:32,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:33,295 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 20:59:33,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35537576] [2024-06-21 20:59:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35537576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:33,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:33,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472389361] [2024-06-21 20:59:33,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:33,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 20:59:33,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 319 transitions, 4218 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:33,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:33,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 20:59:33,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:34,500 INFO L124 PetriNetUnfolderBase]: 4038/6040 cut-off events. [2024-06-21 20:59:34,500 INFO L125 PetriNetUnfolderBase]: For 718864/718864 co-relation queries the response was YES. [2024-06-21 20:59:34,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56882 conditions, 6040 events. 4038/6040 cut-off events. For 718864/718864 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 30809 event pairs, 840 based on Foata normal form. 6/6043 useless extension candidates. Maximal degree in co-relation 56782. Up to 5053 conditions per place. [2024-06-21 20:59:34,566 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 205 selfloop transitions, 161 changer transitions 0/371 dead transitions. [2024-06-21 20:59:34,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 371 transitions, 5202 flow [2024-06-21 20:59:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 20:59:34,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-21 20:59:34,568 INFO L175 Difference]: Start difference. First operand has 217 places, 319 transitions, 4218 flow. Second operand 10 states and 179 transitions. [2024-06-21 20:59:34,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 371 transitions, 5202 flow [2024-06-21 20:59:35,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 371 transitions, 4876 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:35,297 INFO L231 Difference]: Finished difference. Result has 220 places, 333 transitions, 4371 flow [2024-06-21 20:59:35,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4371, PETRI_PLACES=220, PETRI_TRANSITIONS=333} [2024-06-21 20:59:35,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-21 20:59:35,298 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 333 transitions, 4371 flow [2024-06-21 20:59:35,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:35,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:35,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:35,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:59:35,298 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:35,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:35,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1441130846, now seen corresponding path program 1 times [2024-06-21 20:59:35,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:35,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536739201] [2024-06-21 20:59:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:35,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:35,989 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 20:59:35,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:35,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536739201] [2024-06-21 20:59:35,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536739201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:35,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:35,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119669778] [2024-06-21 20:59:35,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:35,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:35,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:35,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:36,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:36,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 333 transitions, 4371 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:59:36,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:36,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:37,212 INFO L124 PetriNetUnfolderBase]: 3850/5845 cut-off events. [2024-06-21 20:59:37,212 INFO L125 PetriNetUnfolderBase]: For 735411/735435 co-relation queries the response was YES. [2024-06-21 20:59:37,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56143 conditions, 5845 events. 3850/5845 cut-off events. For 735411/735435 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 30566 event pairs, 894 based on Foata normal form. 6/5820 useless extension candidates. Maximal degree in co-relation 56041. Up to 5291 conditions per place. [2024-06-21 20:59:37,282 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 270 selfloop transitions, 58 changer transitions 0/361 dead transitions. [2024-06-21 20:59:37,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 361 transitions, 5307 flow [2024-06-21 20:59:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:59:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:59:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:59:37,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 20:59:37,283 INFO L175 Difference]: Start difference. First operand has 220 places, 333 transitions, 4371 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:59:37,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 361 transitions, 5307 flow [2024-06-21 20:59:38,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 361 transitions, 4942 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:38,004 INFO L231 Difference]: Finished difference. Result has 219 places, 339 transitions, 4233 flow [2024-06-21 20:59:38,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4233, PETRI_PLACES=219, PETRI_TRANSITIONS=339} [2024-06-21 20:59:38,004 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-21 20:59:38,004 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 339 transitions, 4233 flow [2024-06-21 20:59:38,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:59:38,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:38,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:59:38,005 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:38,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1441488896, now seen corresponding path program 2 times [2024-06-21 20:59:38,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:38,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956279667] [2024-06-21 20:59:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:38,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:38,698 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 20:59:38,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956279667] [2024-06-21 20:59:38,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956279667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:38,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:38,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:38,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409195604] [2024-06-21 20:59:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:38,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:38,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:38,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:38,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 339 transitions, 4233 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:59:38,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:38,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:38,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:39,975 INFO L124 PetriNetUnfolderBase]: 3855/5850 cut-off events. [2024-06-21 20:59:39,976 INFO L125 PetriNetUnfolderBase]: For 757219/757234 co-relation queries the response was YES. [2024-06-21 20:59:40,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56639 conditions, 5850 events. 3855/5850 cut-off events. For 757219/757234 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 30567 event pairs, 874 based on Foata normal form. 2/5828 useless extension candidates. Maximal degree in co-relation 56535. Up to 5289 conditions per place. [2024-06-21 20:59:40,043 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 268 selfloop transitions, 59 changer transitions 0/360 dead transitions. [2024-06-21 20:59:40,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 360 transitions, 5117 flow [2024-06-21 20:59:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:59:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:59:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 20:59:40,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2024-06-21 20:59:40,044 INFO L175 Difference]: Start difference. First operand has 219 places, 339 transitions, 4233 flow. Second operand 7 states and 129 transitions. [2024-06-21 20:59:40,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 360 transitions, 5117 flow [2024-06-21 20:59:40,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 360 transitions, 5042 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 20:59:40,702 INFO L231 Difference]: Finished difference. Result has 223 places, 342 transitions, 4332 flow [2024-06-21 20:59:40,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4332, PETRI_PLACES=223, PETRI_TRANSITIONS=342} [2024-06-21 20:59:40,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-21 20:59:40,703 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 342 transitions, 4332 flow [2024-06-21 20:59:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:59:40,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:40,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:40,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:59:40,703 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:40,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:40,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1441489330, now seen corresponding path program 1 times [2024-06-21 20:59:40,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:40,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423858358] [2024-06-21 20:59:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:40,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:41,396 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 20:59:41,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:41,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423858358] [2024-06-21 20:59:41,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423858358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:41,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:41,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:41,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217197696] [2024-06-21 20:59:41,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:41,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:41,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:41,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:41,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:41,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 20:59:41,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 342 transitions, 4332 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 20:59:41,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:41,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 20:59:41,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:42,689 INFO L124 PetriNetUnfolderBase]: 4052/6049 cut-off events. [2024-06-21 20:59:42,690 INFO L125 PetriNetUnfolderBase]: For 778794/778813 co-relation queries the response was YES. [2024-06-21 20:59:42,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58404 conditions, 6049 events. 4052/6049 cut-off events. For 778794/778813 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 30894 event pairs, 966 based on Foata normal form. 5/6030 useless extension candidates. Maximal degree in co-relation 58298. Up to 5756 conditions per place. [2024-06-21 20:59:42,760 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 301 selfloop transitions, 31 changer transitions 0/363 dead transitions. [2024-06-21 20:59:42,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 363 transitions, 5262 flow [2024-06-21 20:59:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:59:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:59:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:59:42,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 20:59:42,761 INFO L175 Difference]: Start difference. First operand has 223 places, 342 transitions, 4332 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:59:42,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 363 transitions, 5262 flow [2024-06-21 20:59:43,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 363 transitions, 5161 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:43,331 INFO L231 Difference]: Finished difference. Result has 226 places, 348 transitions, 4401 flow [2024-06-21 20:59:43,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4231, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4401, PETRI_PLACES=226, PETRI_TRANSITIONS=348} [2024-06-21 20:59:43,332 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-21 20:59:43,332 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 348 transitions, 4401 flow [2024-06-21 20:59:43,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 20:59:43,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:43,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:43,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:59:43,333 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:43,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1641033139, now seen corresponding path program 7 times [2024-06-21 20:59:43,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:43,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890288600] [2024-06-21 20:59:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:44,585 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 20:59:44,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:44,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890288600] [2024-06-21 20:59:44,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890288600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:44,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:44,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:44,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43588613] [2024-06-21 20:59:44,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:44,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:44,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:44,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:44,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:44,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:44,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 348 transitions, 4401 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:44,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:44,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:44,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:45,843 INFO L124 PetriNetUnfolderBase]: 3795/5779 cut-off events. [2024-06-21 20:59:45,843 INFO L125 PetriNetUnfolderBase]: For 804608/804608 co-relation queries the response was YES. [2024-06-21 20:59:45,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58506 conditions, 5779 events. 3795/5779 cut-off events. For 804608/804608 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 30548 event pairs, 741 based on Foata normal form. 4/5778 useless extension candidates. Maximal degree in co-relation 58399. Up to 4892 conditions per place. [2024-06-21 20:59:45,909 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 222 selfloop transitions, 154 changer transitions 0/386 dead transitions. [2024-06-21 20:59:45,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 386 transitions, 5359 flow [2024-06-21 20:59:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 20:59:45,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 20:59:45,910 INFO L175 Difference]: Start difference. First operand has 226 places, 348 transitions, 4401 flow. Second operand 10 states and 185 transitions. [2024-06-21 20:59:45,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 386 transitions, 5359 flow [2024-06-21 20:59:46,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 386 transitions, 5294 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 20:59:46,618 INFO L231 Difference]: Finished difference. Result has 233 places, 350 transitions, 4737 flow [2024-06-21 20:59:46,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4336, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4737, PETRI_PLACES=233, PETRI_TRANSITIONS=350} [2024-06-21 20:59:46,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-21 20:59:46,619 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 350 transitions, 4737 flow [2024-06-21 20:59:46,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:46,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:46,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:46,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:59:46,620 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:46,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1640817658, now seen corresponding path program 2 times [2024-06-21 20:59:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490200085] [2024-06-21 20:59:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:47,829 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 20:59:47,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:47,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490200085] [2024-06-21 20:59:47,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490200085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:47,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:47,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:47,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8401830] [2024-06-21 20:59:47,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:47,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:47,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:47,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:48,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 20:59:48,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 350 transitions, 4737 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:48,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:48,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 20:59:48,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:49,190 INFO L124 PetriNetUnfolderBase]: 4077/6092 cut-off events. [2024-06-21 20:59:49,190 INFO L125 PetriNetUnfolderBase]: For 834287/834293 co-relation queries the response was YES. [2024-06-21 20:59:49,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60476 conditions, 6092 events. 4077/6092 cut-off events. For 834287/834293 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 31049 event pairs, 817 based on Foata normal form. 10/6083 useless extension candidates. Maximal degree in co-relation 60367. Up to 4650 conditions per place. [2024-06-21 20:59:49,260 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 197 selfloop transitions, 197 changer transitions 0/401 dead transitions. [2024-06-21 20:59:49,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 401 transitions, 5753 flow [2024-06-21 20:59:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 20:59:49,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 20:59:49,261 INFO L175 Difference]: Start difference. First operand has 233 places, 350 transitions, 4737 flow. Second operand 10 states and 185 transitions. [2024-06-21 20:59:49,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 401 transitions, 5753 flow [2024-06-21 20:59:50,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 401 transitions, 5310 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:50,091 INFO L231 Difference]: Finished difference. Result has 238 places, 362 transitions, 4907 flow [2024-06-21 20:59:50,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4907, PETRI_PLACES=238, PETRI_TRANSITIONS=362} [2024-06-21 20:59:50,092 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-21 20:59:50,092 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 362 transitions, 4907 flow [2024-06-21 20:59:50,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:50,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:50,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:50,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:59:50,092 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:50,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1907397974, now seen corresponding path program 3 times [2024-06-21 20:59:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479147501] [2024-06-21 20:59:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:50,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:51,433 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 20:59:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479147501] [2024-06-21 20:59:51,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479147501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:51,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:51,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:51,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058478470] [2024-06-21 20:59:51,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:51,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:51,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:51,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 20:59:51,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 362 transitions, 4907 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:51,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:51,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 20:59:51,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:52,802 INFO L124 PetriNetUnfolderBase]: 4099/6123 cut-off events. [2024-06-21 20:59:52,803 INFO L125 PetriNetUnfolderBase]: For 849801/849813 co-relation queries the response was YES. [2024-06-21 20:59:52,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61684 conditions, 6123 events. 4099/6123 cut-off events. For 849801/849813 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 31288 event pairs, 916 based on Foata normal form. 10/6125 useless extension candidates. Maximal degree in co-relation 61571. Up to 5696 conditions per place. [2024-06-21 20:59:52,869 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 332 selfloop transitions, 82 changer transitions 0/421 dead transitions. [2024-06-21 20:59:52,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 421 transitions, 6448 flow [2024-06-21 20:59:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:59:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:59:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 20:59:52,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 20:59:52,870 INFO L175 Difference]: Start difference. First operand has 238 places, 362 transitions, 4907 flow. Second operand 11 states and 187 transitions. [2024-06-21 20:59:52,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 421 transitions, 6448 flow [2024-06-21 20:59:53,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 421 transitions, 6277 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:53,564 INFO L231 Difference]: Finished difference. Result has 246 places, 385 transitions, 5319 flow [2024-06-21 20:59:53,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4757, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5319, PETRI_PLACES=246, PETRI_TRANSITIONS=385} [2024-06-21 20:59:53,565 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-21 20:59:53,565 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 385 transitions, 5319 flow [2024-06-21 20:59:53,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:53,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:53,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:53,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:59:53,565 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:53,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:53,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1916921174, now seen corresponding path program 4 times [2024-06-21 20:59:53,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:53,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969201836] [2024-06-21 20:59:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:54,777 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 20:59:54,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:54,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969201836] [2024-06-21 20:59:54,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969201836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:54,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:54,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:54,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272800344] [2024-06-21 20:59:54,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:54,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:54,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:54,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:54,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:54,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 20:59:54,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 385 transitions, 5319 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:54,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:54,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 20:59:54,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:56,143 INFO L124 PetriNetUnfolderBase]: 4132/6172 cut-off events. [2024-06-21 20:59:56,143 INFO L125 PetriNetUnfolderBase]: For 878647/878653 co-relation queries the response was YES. [2024-06-21 20:59:56,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62813 conditions, 6172 events. 4132/6172 cut-off events. For 878647/878653 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 31570 event pairs, 777 based on Foata normal form. 10/6162 useless extension candidates. Maximal degree in co-relation 62696. Up to 4717 conditions per place. [2024-06-21 20:59:56,218 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 198 selfloop transitions, 225 changer transitions 0/430 dead transitions. [2024-06-21 20:59:56,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 430 transitions, 6427 flow [2024-06-21 20:59:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 20:59:56,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-21 20:59:56,219 INFO L175 Difference]: Start difference. First operand has 246 places, 385 transitions, 5319 flow. Second operand 10 states and 184 transitions. [2024-06-21 20:59:56,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 430 transitions, 6427 flow [2024-06-21 20:59:57,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 430 transitions, 6318 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:57,221 INFO L231 Difference]: Finished difference. Result has 253 places, 393 transitions, 5818 flow [2024-06-21 20:59:57,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5214, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5818, PETRI_PLACES=253, PETRI_TRANSITIONS=393} [2024-06-21 20:59:57,221 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-21 20:59:57,221 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 393 transitions, 5818 flow [2024-06-21 20:59:57,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:57,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:57,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:57,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:59:57,222 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:57,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:57,222 INFO L85 PathProgramCache]: Analyzing trace with hash -654144753, now seen corresponding path program 8 times [2024-06-21 20:59:57,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:57,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624549336] [2024-06-21 20:59:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:57,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:58,392 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 20:59:58,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:58,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624549336] [2024-06-21 20:59:58,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624549336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:58,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:58,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:58,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972907590] [2024-06-21 20:59:58,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:58,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:58,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:58,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:58,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:58,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:58,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 393 transitions, 5818 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 20:59:58,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:58,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:58,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:59,764 INFO L124 PetriNetUnfolderBase]: 3909/5946 cut-off events. [2024-06-21 20:59:59,764 INFO L125 PetriNetUnfolderBase]: For 893520/893531 co-relation queries the response was YES. [2024-06-21 20:59:59,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63195 conditions, 5946 events. 3909/5946 cut-off events. For 893520/893531 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 31476 event pairs, 788 based on Foata normal form. 8/5925 useless extension candidates. Maximal degree in co-relation 63075. Up to 5035 conditions per place. [2024-06-21 20:59:59,841 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 270 selfloop transitions, 139 changer transitions 0/425 dead transitions. [2024-06-21 20:59:59,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 425 transitions, 6826 flow [2024-06-21 20:59:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:59:59,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 20:59:59,842 INFO L175 Difference]: Start difference. First operand has 253 places, 393 transitions, 5818 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:59:59,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 425 transitions, 6826 flow [2024-06-21 21:00:00,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 425 transitions, 6349 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 21:00:00,842 INFO L231 Difference]: Finished difference. Result has 256 places, 395 transitions, 5716 flow [2024-06-21 21:00:00,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5341, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5716, PETRI_PLACES=256, PETRI_TRANSITIONS=395} [2024-06-21 21:00:00,842 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-21 21:00:00,842 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 395 transitions, 5716 flow [2024-06-21 21:00:00,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 21:00:00,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:00,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:00:00,843 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:00,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash -121544447, now seen corresponding path program 9 times [2024-06-21 21:00:00,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:00,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445126749] [2024-06-21 21:00:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:02,090 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 21:00:02,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:02,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445126749] [2024-06-21 21:00:02,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445126749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:02,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:02,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:00:02,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310148328] [2024-06-21 21:00:02,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:02,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:00:02,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:00:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:00:02,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:02,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 395 transitions, 5716 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 21:00:02,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:02,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:02,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:03,547 INFO L124 PetriNetUnfolderBase]: 3934/5986 cut-off events. [2024-06-21 21:00:03,548 INFO L125 PetriNetUnfolderBase]: For 920541/920547 co-relation queries the response was YES. [2024-06-21 21:00:03,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63589 conditions, 5986 events. 3934/5986 cut-off events. For 920541/920547 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 31696 event pairs, 793 based on Foata normal form. 8/5972 useless extension candidates. Maximal degree in co-relation 63468. Up to 4992 conditions per place. [2024-06-21 21:00:03,616 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 269 selfloop transitions, 146 changer transitions 0/431 dead transitions. [2024-06-21 21:00:03,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 431 transitions, 7084 flow [2024-06-21 21:00:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:00:03,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-21 21:00:03,617 INFO L175 Difference]: Start difference. First operand has 256 places, 395 transitions, 5716 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:00:03,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 431 transitions, 7084 flow [2024-06-21 21:00:04,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 431 transitions, 6727 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:04,474 INFO L231 Difference]: Finished difference. Result has 258 places, 399 transitions, 5842 flow [2024-06-21 21:00:04,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5359, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5842, PETRI_PLACES=258, PETRI_TRANSITIONS=399} [2024-06-21 21:00:04,475 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-21 21:00:04,475 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 399 transitions, 5842 flow [2024-06-21 21:00:04,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 21:00:04,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:04,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:04,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:00:04,475 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:04,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash -116034197, now seen corresponding path program 10 times [2024-06-21 21:00:04,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:04,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041894126] [2024-06-21 21:00:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:04,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:05,759 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 21:00:05,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:05,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041894126] [2024-06-21 21:00:05,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041894126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:05,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:05,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:00:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351151007] [2024-06-21 21:00:05,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:05,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:00:05,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:00:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:00:05,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:05,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 399 transitions, 5842 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 21:00:05,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:05,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:05,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:07,194 INFO L124 PetriNetUnfolderBase]: 3926/5970 cut-off events. [2024-06-21 21:00:07,194 INFO L125 PetriNetUnfolderBase]: For 936025/936025 co-relation queries the response was YES. [2024-06-21 21:00:07,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63566 conditions, 5970 events. 3926/5970 cut-off events. For 936025/936025 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 31564 event pairs, 778 based on Foata normal form. 4/5969 useless extension candidates. Maximal degree in co-relation 63444. Up to 5063 conditions per place. [2024-06-21 21:00:07,274 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 280 selfloop transitions, 140 changer transitions 0/436 dead transitions. [2024-06-21 21:00:07,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 436 transitions, 6810 flow [2024-06-21 21:00:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:00:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:00:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:00:07,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-21 21:00:07,276 INFO L175 Difference]: Start difference. First operand has 258 places, 399 transitions, 5842 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:00:07,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 436 transitions, 6810 flow [2024-06-21 21:00:08,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 436 transitions, 6490 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-21 21:00:08,553 INFO L231 Difference]: Finished difference. Result has 263 places, 399 transitions, 5809 flow [2024-06-21 21:00:08,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5522, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5809, PETRI_PLACES=263, PETRI_TRANSITIONS=399} [2024-06-21 21:00:08,553 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-21 21:00:08,553 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 399 transitions, 5809 flow [2024-06-21 21:00:08,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 21:00:08,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:08,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:08,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:00:08,554 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:08,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -115818716, now seen corresponding path program 5 times [2024-06-21 21:00:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:08,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836685648] [2024-06-21 21:00:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:08,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:09,785 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 21:00:09,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836685648] [2024-06-21 21:00:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836685648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:09,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:09,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:00:09,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64458253] [2024-06-21 21:00:09,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:09,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:00:09,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:09,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:00:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:00:09,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:00:09,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 399 transitions, 5809 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:09,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:09,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:00:09,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:11,188 INFO L124 PetriNetUnfolderBase]: 4137/6183 cut-off events. [2024-06-21 21:00:11,188 INFO L125 PetriNetUnfolderBase]: For 960311/960317 co-relation queries the response was YES. [2024-06-21 21:00:11,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64639 conditions, 6183 events. 4137/6183 cut-off events. For 960311/960317 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 31656 event pairs, 849 based on Foata normal form. 10/6173 useless extension candidates. Maximal degree in co-relation 64515. Up to 4708 conditions per place. [2024-06-21 21:00:11,268 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 235 selfloop transitions, 200 changer transitions 0/442 dead transitions. [2024-06-21 21:00:11,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 442 transitions, 6881 flow [2024-06-21 21:00:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:00:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:00:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 21:00:11,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-21 21:00:11,269 INFO L175 Difference]: Start difference. First operand has 263 places, 399 transitions, 5809 flow. Second operand 10 states and 186 transitions. [2024-06-21 21:00:11,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 442 transitions, 6881 flow [2024-06-21 21:00:12,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 442 transitions, 6482 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-21 21:00:12,572 INFO L231 Difference]: Finished difference. Result has 265 places, 406 transitions, 5912 flow [2024-06-21 21:00:12,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5912, PETRI_PLACES=265, PETRI_TRANSITIONS=406} [2024-06-21 21:00:12,573 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-21 21:00:12,573 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 406 transitions, 5912 flow [2024-06-21 21:00:12,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:12,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:12,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:12,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:00:12,573 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:12,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:12,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1854796210, now seen corresponding path program 2 times [2024-06-21 21:00:12,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:12,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270439967] [2024-06-21 21:00:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:12,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:13,300 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 21:00:13,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270439967] [2024-06-21 21:00:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270439967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:13,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:13,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:00:13,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937413544] [2024-06-21 21:00:13,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:13,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:00:13,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:13,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:00:13,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:00:13,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:00:13,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 406 transitions, 5912 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 21:00:13,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:13,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:00:13,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:14,675 INFO L124 PetriNetUnfolderBase]: 4103/6134 cut-off events. [2024-06-21 21:00:14,675 INFO L125 PetriNetUnfolderBase]: For 968942/968969 co-relation queries the response was YES. [2024-06-21 21:00:14,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64580 conditions, 6134 events. 4103/6134 cut-off events. For 968942/968969 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 31522 event pairs, 943 based on Foata normal form. 9/6114 useless extension candidates. Maximal degree in co-relation 64454. Up to 5822 conditions per place. [2024-06-21 21:00:14,755 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 351 selfloop transitions, 33 changer transitions 0/419 dead transitions. [2024-06-21 21:00:14,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 419 transitions, 6898 flow [2024-06-21 21:00:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:00:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:00:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 21:00:14,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-21 21:00:14,756 INFO L175 Difference]: Start difference. First operand has 265 places, 406 transitions, 5912 flow. Second operand 7 states and 114 transitions. [2024-06-21 21:00:14,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 419 transitions, 6898 flow [2024-06-21 21:00:15,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 419 transitions, 6224 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 21:00:15,678 INFO L231 Difference]: Finished difference. Result has 260 places, 409 transitions, 5358 flow [2024-06-21 21:00:15,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5358, PETRI_PLACES=260, PETRI_TRANSITIONS=409} [2024-06-21 21:00:15,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 215 predicate places. [2024-06-21 21:00:15,679 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 409 transitions, 5358 flow [2024-06-21 21:00:15,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 21:00:15,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:15,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:15,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:00:15,679 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:15,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1854795776, now seen corresponding path program 3 times [2024-06-21 21:00:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:15,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181600312] [2024-06-21 21:00:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:15,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:16,384 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 21:00:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181600312] [2024-06-21 21:00:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181600312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:16,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:16,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:00:16,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958920698] [2024-06-21 21:00:16,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:16,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:00:16,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:16,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:00:16,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:00:16,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:16,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 409 transitions, 5358 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:16,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:16,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:16,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:17,704 INFO L124 PetriNetUnfolderBase]: 3923/5954 cut-off events. [2024-06-21 21:00:17,704 INFO L125 PetriNetUnfolderBase]: For 987040/987061 co-relation queries the response was YES. [2024-06-21 21:00:17,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62471 conditions, 5954 events. 3923/5954 cut-off events. For 987040/987061 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 31293 event pairs, 860 based on Foata normal form. 6/5919 useless extension candidates. Maximal degree in co-relation 62345. Up to 5372 conditions per place. [2024-06-21 21:00:17,781 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 322 selfloop transitions, 58 changer transitions 0/420 dead transitions. [2024-06-21 21:00:17,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 420 transitions, 6152 flow [2024-06-21 21:00:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:00:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:00:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:00:17,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-21 21:00:17,781 INFO L175 Difference]: Start difference. First operand has 260 places, 409 transitions, 5358 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:00:17,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 420 transitions, 6152 flow [2024-06-21 21:00:19,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 420 transitions, 6014 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 21:00:19,097 INFO L231 Difference]: Finished difference. Result has 262 places, 409 transitions, 5342 flow [2024-06-21 21:00:19,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5342, PETRI_PLACES=262, PETRI_TRANSITIONS=409} [2024-06-21 21:00:19,097 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-21 21:00:19,097 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 409 transitions, 5342 flow [2024-06-21 21:00:19,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:19,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:19,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:19,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:00:19,097 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:19,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1855271440, now seen corresponding path program 3 times [2024-06-21 21:00:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227384845] [2024-06-21 21:00:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:19,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:19,794 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 21:00:19,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227384845] [2024-06-21 21:00:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227384845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:19,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:19,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:00:19,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731746445] [2024-06-21 21:00:19,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:19,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:00:19,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:00:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:00:19,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:00:19,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 409 transitions, 5342 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 21:00:19,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:19,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:00:19,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:21,242 INFO L124 PetriNetUnfolderBase]: 4094/6122 cut-off events. [2024-06-21 21:00:21,242 INFO L125 PetriNetUnfolderBase]: For 1005200/1005227 co-relation queries the response was YES. [2024-06-21 21:00:21,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63797 conditions, 6122 events. 4094/6122 cut-off events. For 1005200/1005227 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 31492 event pairs, 942 based on Foata normal form. 9/6102 useless extension candidates. Maximal degree in co-relation 63670. Up to 5811 conditions per place. [2024-06-21 21:00:21,314 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 349 selfloop transitions, 34 changer transitions 0/418 dead transitions. [2024-06-21 21:00:21,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 418 transitions, 6134 flow [2024-06-21 21:00:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:00:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:00:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:00:21,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:00:21,315 INFO L175 Difference]: Start difference. First operand has 262 places, 409 transitions, 5342 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:00:21,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 418 transitions, 6134 flow [2024-06-21 21:00:22,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 418 transitions, 5898 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:22,412 INFO L231 Difference]: Finished difference. Result has 262 places, 409 transitions, 5180 flow [2024-06-21 21:00:22,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5180, PETRI_PLACES=262, PETRI_TRANSITIONS=409} [2024-06-21 21:00:22,413 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-21 21:00:22,413 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 409 transitions, 5180 flow [2024-06-21 21:00:22,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 21:00:22,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:22,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:22,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:00:22,413 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:22,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1618625624, now seen corresponding path program 1 times [2024-06-21 21:00:22,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:22,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620526655] [2024-06-21 21:00:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:22,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:23,285 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 21:00:23,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:23,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620526655] [2024-06-21 21:00:23,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620526655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:23,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:23,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:23,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461142236] [2024-06-21 21:00:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:23,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:23,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:23,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:23,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:23,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:23,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 409 transitions, 5180 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:23,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:23,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:23,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:24,477 INFO L124 PetriNetUnfolderBase]: 3799/5815 cut-off events. [2024-06-21 21:00:24,478 INFO L125 PetriNetUnfolderBase]: For 896134/896134 co-relation queries the response was YES. [2024-06-21 21:00:24,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58817 conditions, 5815 events. 3799/5815 cut-off events. For 896134/896134 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 30746 event pairs, 857 based on Foata normal form. 1/5813 useless extension candidates. Maximal degree in co-relation 58689. Up to 5492 conditions per place. [2024-06-21 21:00:24,548 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 397 selfloop transitions, 25 changer transitions 0/431 dead transitions. [2024-06-21 21:00:24,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 431 transitions, 6340 flow [2024-06-21 21:00:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:00:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:00:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:00:24,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40584415584415584 [2024-06-21 21:00:24,549 INFO L175 Difference]: Start difference. First operand has 262 places, 409 transitions, 5180 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:00:24,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 431 transitions, 6340 flow [2024-06-21 21:00:25,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 431 transitions, 6262 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:00:25,908 INFO L231 Difference]: Finished difference. Result has 263 places, 415 transitions, 5280 flow [2024-06-21 21:00:25,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5280, PETRI_PLACES=263, PETRI_TRANSITIONS=415} [2024-06-21 21:00:25,909 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-21 21:00:25,909 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 415 transitions, 5280 flow [2024-06-21 21:00:25,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:25,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:25,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:25,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:00:25,909 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:25,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1618805362, now seen corresponding path program 1 times [2024-06-21 21:00:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:25,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427330937] [2024-06-21 21:00:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:25,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:26,834 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 21:00:26,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:26,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427330937] [2024-06-21 21:00:26,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427330937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:26,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:26,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:26,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104708827] [2024-06-21 21:00:26,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:26,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:26,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:26,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:26,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:26,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 415 transitions, 5280 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:26,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:26,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:26,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:28,093 INFO L124 PetriNetUnfolderBase]: 3791/5794 cut-off events. [2024-06-21 21:00:28,093 INFO L125 PetriNetUnfolderBase]: For 915561/915576 co-relation queries the response was YES. [2024-06-21 21:00:28,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59055 conditions, 5794 events. 3791/5794 cut-off events. For 915561/915576 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 30672 event pairs, 878 based on Foata normal form. 1/5771 useless extension candidates. Maximal degree in co-relation 58926. Up to 5376 conditions per place. [2024-06-21 21:00:28,165 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 371 selfloop transitions, 25 changer transitions 0/434 dead transitions. [2024-06-21 21:00:28,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 434 transitions, 6370 flow [2024-06-21 21:00:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:00:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:00:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:00:28,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778409090909091 [2024-06-21 21:00:28,166 INFO L175 Difference]: Start difference. First operand has 263 places, 415 transitions, 5280 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:00:28,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 434 transitions, 6370 flow [2024-06-21 21:00:29,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 434 transitions, 6287 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 21:00:29,290 INFO L231 Difference]: Finished difference. Result has 268 places, 421 transitions, 5367 flow [2024-06-21 21:00:29,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5197, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5367, PETRI_PLACES=268, PETRI_TRANSITIONS=421} [2024-06-21 21:00:29,291 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-21 21:00:29,291 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 421 transitions, 5367 flow [2024-06-21 21:00:29,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:29,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:29,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:29,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:00:29,291 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:29,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1618805114, now seen corresponding path program 2 times [2024-06-21 21:00:29,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:29,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595802916] [2024-06-21 21:00:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:30,075 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 21:00:30,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595802916] [2024-06-21 21:00:30,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595802916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:30,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:30,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:00:30,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431872027] [2024-06-21 21:00:30,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:30,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:00:30,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:30,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:00:30,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:00:30,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:30,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 421 transitions, 5367 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:30,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:30,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:30,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:31,249 INFO L124 PetriNetUnfolderBase]: 3821/5841 cut-off events. [2024-06-21 21:00:31,249 INFO L125 PetriNetUnfolderBase]: For 945362/945362 co-relation queries the response was YES. [2024-06-21 21:00:31,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60368 conditions, 5841 events. 3821/5841 cut-off events. For 945362/945362 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 30836 event pairs, 856 based on Foata normal form. 1/5839 useless extension candidates. Maximal degree in co-relation 60237. Up to 5515 conditions per place. [2024-06-21 21:00:31,322 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 399 selfloop transitions, 27 changer transitions 0/437 dead transitions. [2024-06-21 21:00:31,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 437 transitions, 6463 flow [2024-06-21 21:00:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:00:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:00:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:00:31,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-21 21:00:31,323 INFO L175 Difference]: Start difference. First operand has 268 places, 421 transitions, 5367 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:00:31,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 437 transitions, 6463 flow [2024-06-21 21:00:32,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 437 transitions, 6394 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 21:00:32,799 INFO L231 Difference]: Finished difference. Result has 271 places, 424 transitions, 5410 flow [2024-06-21 21:00:32,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5298, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5410, PETRI_PLACES=271, PETRI_TRANSITIONS=424} [2024-06-21 21:00:32,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-21 21:00:32,799 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 424 transitions, 5410 flow [2024-06-21 21:00:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:32,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:32,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:32,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:00:32,800 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:32,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash -284299248, now seen corresponding path program 2 times [2024-06-21 21:00:32,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:32,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674349564] [2024-06-21 21:00:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:32,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:33,534 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 21:00:33,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:33,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674349564] [2024-06-21 21:00:33,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674349564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:33,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:33,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:00:33,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949145772] [2024-06-21 21:00:33,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:33,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:00:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:00:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:00:33,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:33,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 424 transitions, 5410 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:33,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:34,744 INFO L124 PetriNetUnfolderBase]: 3801/5808 cut-off events. [2024-06-21 21:00:34,744 INFO L125 PetriNetUnfolderBase]: For 962223/962238 co-relation queries the response was YES. [2024-06-21 21:00:34,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60143 conditions, 5808 events. 3801/5808 cut-off events. For 962223/962238 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 30760 event pairs, 876 based on Foata normal form. 1/5785 useless extension candidates. Maximal degree in co-relation 60010. Up to 5402 conditions per place. [2024-06-21 21:00:34,818 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 378 selfloop transitions, 20 changer transitions 0/437 dead transitions. [2024-06-21 21:00:34,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 437 transitions, 6444 flow [2024-06-21 21:00:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:00:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:00:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:00:34,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-21 21:00:34,819 INFO L175 Difference]: Start difference. First operand has 271 places, 424 transitions, 5410 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:00:34,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 437 transitions, 6444 flow [2024-06-21 21:00:35,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 437 transitions, 6366 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 21:00:35,857 INFO L231 Difference]: Finished difference. Result has 274 places, 427 transitions, 5434 flow [2024-06-21 21:00:35,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5434, PETRI_PLACES=274, PETRI_TRANSITIONS=427} [2024-06-21 21:00:35,857 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-21 21:00:35,858 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 427 transitions, 5434 flow [2024-06-21 21:00:35,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:35,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:35,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:00:35,858 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:35,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1854980474, now seen corresponding path program 3 times [2024-06-21 21:00:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:35,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571283595] [2024-06-21 21:00:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:36,594 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 21:00:36,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:36,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571283595] [2024-06-21 21:00:36,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571283595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:36,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:36,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:00:36,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909535049] [2024-06-21 21:00:36,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:36,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:00:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:00:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:00:36,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:36,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 427 transitions, 5434 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:36,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:36,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:36,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:37,849 INFO L124 PetriNetUnfolderBase]: 3823/5844 cut-off events. [2024-06-21 21:00:37,849 INFO L125 PetriNetUnfolderBase]: For 987385/987385 co-relation queries the response was YES. [2024-06-21 21:00:37,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60888 conditions, 5844 events. 3823/5844 cut-off events. For 987385/987385 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 30834 event pairs, 855 based on Foata normal form. 1/5842 useless extension candidates. Maximal degree in co-relation 60754. Up to 5544 conditions per place. [2024-06-21 21:00:37,919 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 409 selfloop transitions, 15 changer transitions 0/436 dead transitions. [2024-06-21 21:00:37,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 436 transitions, 6308 flow [2024-06-21 21:00:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:00:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:00:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 21:00:37,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2024-06-21 21:00:37,920 INFO L175 Difference]: Start difference. First operand has 274 places, 427 transitions, 5434 flow. Second operand 7 states and 115 transitions. [2024-06-21 21:00:37,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 436 transitions, 6308 flow [2024-06-21 21:00:39,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 436 transitions, 6192 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 21:00:39,057 INFO L231 Difference]: Finished difference. Result has 276 places, 427 transitions, 5354 flow [2024-06-21 21:00:39,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5318, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5354, PETRI_PLACES=276, PETRI_TRANSITIONS=427} [2024-06-21 21:00:39,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-21 21:00:39,057 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 427 transitions, 5354 flow [2024-06-21 21:00:39,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:39,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:39,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:39,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:00:39,058 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:39,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:39,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1586167188, now seen corresponding path program 3 times [2024-06-21 21:00:39,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:39,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78067899] [2024-06-21 21:00:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:39,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:39,793 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 21:00:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:39,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78067899] [2024-06-21 21:00:39,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78067899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:39,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:39,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:00:39,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774751874] [2024-06-21 21:00:39,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:00:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:00:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:00:39,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:39,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 427 transitions, 5354 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:39,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:39,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:39,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:41,111 INFO L124 PetriNetUnfolderBase]: 3795/5800 cut-off events. [2024-06-21 21:00:41,111 INFO L125 PetriNetUnfolderBase]: For 1001004/1001019 co-relation queries the response was YES. [2024-06-21 21:00:41,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60386 conditions, 5800 events. 3795/5800 cut-off events. For 1001004/1001019 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 30703 event pairs, 876 based on Foata normal form. 1/5777 useless extension candidates. Maximal degree in co-relation 60251. Up to 5402 conditions per place. [2024-06-21 21:00:41,186 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 381 selfloop transitions, 16 changer transitions 0/436 dead transitions. [2024-06-21 21:00:41,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 436 transitions, 6174 flow [2024-06-21 21:00:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:00:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:00:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:00:41,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35511363636363635 [2024-06-21 21:00:41,187 INFO L175 Difference]: Start difference. First operand has 276 places, 427 transitions, 5354 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:00:41,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 436 transitions, 6174 flow [2024-06-21 21:00:42,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 436 transitions, 6076 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:42,305 INFO L231 Difference]: Finished difference. Result has 277 places, 427 transitions, 5294 flow [2024-06-21 21:00:42,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5256, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5294, PETRI_PLACES=277, PETRI_TRANSITIONS=427} [2024-06-21 21:00:42,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-21 21:00:42,306 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 427 transitions, 5294 flow [2024-06-21 21:00:42,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:00:42,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:42,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:42,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:00:42,306 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:42,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 691775530, now seen corresponding path program 1 times [2024-06-21 21:00:42,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:42,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650680110] [2024-06-21 21:00:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:42,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:43,491 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 21:00:43,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:43,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650680110] [2024-06-21 21:00:43,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650680110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:43,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:43,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:00:43,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916763011] [2024-06-21 21:00:43,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:43,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:00:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:43,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:00:43,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:00:43,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:43,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 427 transitions, 5294 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:43,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:43,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:43,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:45,044 INFO L124 PetriNetUnfolderBase]: 3980/6051 cut-off events. [2024-06-21 21:00:45,044 INFO L125 PetriNetUnfolderBase]: For 1199832/1199836 co-relation queries the response was YES. [2024-06-21 21:00:45,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67223 conditions, 6051 events. 3980/6051 cut-off events. For 1199832/1199836 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 31973 event pairs, 616 based on Foata normal form. 8/6056 useless extension candidates. Maximal degree in co-relation 67087. Up to 5506 conditions per place. [2024-06-21 21:00:45,124 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 391 selfloop transitions, 55 changer transitions 0/467 dead transitions. [2024-06-21 21:00:45,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 467 transitions, 6406 flow [2024-06-21 21:00:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:00:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:00:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 21:00:45,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 21:00:45,125 INFO L175 Difference]: Start difference. First operand has 277 places, 427 transitions, 5294 flow. Second operand 10 states and 180 transitions. [2024-06-21 21:00:45,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 467 transitions, 6406 flow [2024-06-21 21:00:46,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 467 transitions, 6364 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:46,313 INFO L231 Difference]: Finished difference. Result has 280 places, 429 transitions, 5469 flow [2024-06-21 21:00:46,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5252, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5469, PETRI_PLACES=280, PETRI_TRANSITIONS=429} [2024-06-21 21:00:46,314 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-21 21:00:46,314 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 429 transitions, 5469 flow [2024-06-21 21:00:46,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:46,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:46,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:46,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:00:46,314 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:46,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash 749987950, now seen corresponding path program 2 times [2024-06-21 21:00:46,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:46,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421818687] [2024-06-21 21:00:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:46,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421818687] [2024-06-21 21:00:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421818687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:47,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:47,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:00:47,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068508134] [2024-06-21 21:00:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:47,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:00:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:00:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:00:47,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:47,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 429 transitions, 5469 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:47,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:47,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:47,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:49,120 INFO L124 PetriNetUnfolderBase]: 3996/6077 cut-off events. [2024-06-21 21:00:49,121 INFO L125 PetriNetUnfolderBase]: For 1234870/1234874 co-relation queries the response was YES. [2024-06-21 21:00:49,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68032 conditions, 6077 events. 3996/6077 cut-off events. For 1234870/1234874 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 32205 event pairs, 721 based on Foata normal form. 12/6086 useless extension candidates. Maximal degree in co-relation 67895. Up to 5237 conditions per place. [2024-06-21 21:00:49,205 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 317 selfloop transitions, 131 changer transitions 0/469 dead transitions. [2024-06-21 21:00:49,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 469 transitions, 6595 flow [2024-06-21 21:00:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:00:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:00:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 21:00:49,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-21 21:00:49,206 INFO L175 Difference]: Start difference. First operand has 280 places, 429 transitions, 5469 flow. Second operand 10 states and 183 transitions. [2024-06-21 21:00:49,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 469 transitions, 6595 flow [2024-06-21 21:00:50,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 469 transitions, 6396 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:50,765 INFO L231 Difference]: Finished difference. Result has 282 places, 431 transitions, 5646 flow [2024-06-21 21:00:50,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5646, PETRI_PLACES=282, PETRI_TRANSITIONS=431} [2024-06-21 21:00:50,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-21 21:00:50,765 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 431 transitions, 5646 flow [2024-06-21 21:00:50,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:50,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:50,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:50,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:00:50,765 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:50,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:50,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1842101086, now seen corresponding path program 3 times [2024-06-21 21:00:50,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:50,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717044008] [2024-06-21 21:00:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:50,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:52,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:52,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717044008] [2024-06-21 21:00:52,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717044008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:52,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:52,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:00:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920605506] [2024-06-21 21:00:52,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:52,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:00:52,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:52,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:00:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:00:52,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:52,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 431 transitions, 5646 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:52,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:52,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:52,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:53,604 INFO L124 PetriNetUnfolderBase]: 4013/6114 cut-off events. [2024-06-21 21:00:53,604 INFO L125 PetriNetUnfolderBase]: For 1263200/1263204 co-relation queries the response was YES. [2024-06-21 21:00:53,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69096 conditions, 6114 events. 4013/6114 cut-off events. For 1263200/1263204 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 32555 event pairs, 721 based on Foata normal form. 8/6119 useless extension candidates. Maximal degree in co-relation 68958. Up to 5180 conditions per place. [2024-06-21 21:00:53,686 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 327 selfloop transitions, 123 changer transitions 0/471 dead transitions. [2024-06-21 21:00:53,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 471 transitions, 6778 flow [2024-06-21 21:00:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:00:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:00:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 21:00:53,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-21 21:00:53,687 INFO L175 Difference]: Start difference. First operand has 282 places, 431 transitions, 5646 flow. Second operand 10 states and 184 transitions. [2024-06-21 21:00:53,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 471 transitions, 6778 flow [2024-06-21 21:00:55,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 471 transitions, 6426 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:55,067 INFO L231 Difference]: Finished difference. Result has 284 places, 433 transitions, 5655 flow [2024-06-21 21:00:55,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5655, PETRI_PLACES=284, PETRI_TRANSITIONS=433} [2024-06-21 21:00:55,067 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-21 21:00:55,067 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 433 transitions, 5655 flow [2024-06-21 21:00:55,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:55,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:55,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:00:55,068 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:55,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash 749867980, now seen corresponding path program 4 times [2024-06-21 21:00:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753887730] [2024-06-21 21:00:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:56,342 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 21:00:56,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753887730] [2024-06-21 21:00:56,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753887730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:56,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:56,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:00:56,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268192309] [2024-06-21 21:00:56,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:56,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:00:56,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:00:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:00:56,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:00:56,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 433 transitions, 5655 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:56,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:56,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:00:56,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:57,896 INFO L124 PetriNetUnfolderBase]: 4046/6171 cut-off events. [2024-06-21 21:00:57,896 INFO L125 PetriNetUnfolderBase]: For 1308906/1308910 co-relation queries the response was YES. [2024-06-21 21:00:57,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70203 conditions, 6171 events. 4046/6171 cut-off events. For 1308906/1308910 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 32963 event pairs, 747 based on Foata normal form. 8/6176 useless extension candidates. Maximal degree in co-relation 70064. Up to 5125 conditions per place. [2024-06-21 21:00:57,985 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 336 selfloop transitions, 116 changer transitions 0/473 dead transitions. [2024-06-21 21:00:57,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 473 transitions, 6793 flow [2024-06-21 21:00:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:00:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:00:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:00:57,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 21:00:57,986 INFO L175 Difference]: Start difference. First operand has 284 places, 433 transitions, 5655 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:00:57,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 473 transitions, 6793 flow [2024-06-21 21:00:59,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 473 transitions, 6450 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:59,550 INFO L231 Difference]: Finished difference. Result has 286 places, 435 transitions, 5663 flow [2024-06-21 21:00:59,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5663, PETRI_PLACES=286, PETRI_TRANSITIONS=435} [2024-06-21 21:00:59,551 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-21 21:00:59,551 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 435 transitions, 5663 flow [2024-06-21 21:00:59,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:59,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:59,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:59,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:00:59,552 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:59,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:59,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1728869175, now seen corresponding path program 1 times [2024-06-21 21:00:59,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:59,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570897288] [2024-06-21 21:00:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:59,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:00,367 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 21:01:00,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:00,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570897288] [2024-06-21 21:01:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570897288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:00,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:00,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:00,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441181321] [2024-06-21 21:01:00,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:00,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:00,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:00,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:00,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:00,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 435 transitions, 5663 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:00,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:00,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:00,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:01,674 INFO L124 PetriNetUnfolderBase]: 4090/6202 cut-off events. [2024-06-21 21:01:01,674 INFO L125 PetriNetUnfolderBase]: For 1329106/1329125 co-relation queries the response was YES. [2024-06-21 21:01:01,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69887 conditions, 6202 events. 4090/6202 cut-off events. For 1329106/1329125 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 32848 event pairs, 845 based on Foata normal form. 5/6176 useless extension candidates. Maximal degree in co-relation 69747. Up to 5715 conditions per place. [2024-06-21 21:01:01,759 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 383 selfloop transitions, 30 changer transitions 0/459 dead transitions. [2024-06-21 21:01:01,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 459 transitions, 6843 flow [2024-06-21 21:01:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:01:01,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 21:01:01,760 INFO L175 Difference]: Start difference. First operand has 286 places, 435 transitions, 5663 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:01:01,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 459 transitions, 6843 flow [2024-06-21 21:01:03,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 459 transitions, 6510 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:03,429 INFO L231 Difference]: Finished difference. Result has 285 places, 441 transitions, 5530 flow [2024-06-21 21:01:03,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5530, PETRI_PLACES=285, PETRI_TRANSITIONS=441} [2024-06-21 21:01:03,429 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-21 21:01:03,430 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 441 transitions, 5530 flow [2024-06-21 21:01:03,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:03,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:03,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:03,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:01:03,430 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:03,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:03,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1736487735, now seen corresponding path program 2 times [2024-06-21 21:01:03,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:03,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888822074] [2024-06-21 21:01:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:04,181 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 21:01:04,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888822074] [2024-06-21 21:01:04,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888822074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:04,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:04,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:04,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989728607] [2024-06-21 21:01:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:04,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:04,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:04,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:04,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 441 transitions, 5530 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:04,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:04,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:04,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:05,522 INFO L124 PetriNetUnfolderBase]: 4095/6209 cut-off events. [2024-06-21 21:01:05,522 INFO L125 PetriNetUnfolderBase]: For 1353555/1353574 co-relation queries the response was YES. [2024-06-21 21:01:05,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69934 conditions, 6209 events. 4095/6209 cut-off events. For 1353555/1353574 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 32940 event pairs, 845 based on Foata normal form. 5/6183 useless extension candidates. Maximal degree in co-relation 69793. Up to 5745 conditions per place. [2024-06-21 21:01:05,611 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 385 selfloop transitions, 27 changer transitions 0/458 dead transitions. [2024-06-21 21:01:05,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 458 transitions, 6468 flow [2024-06-21 21:01:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:01:05,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-21 21:01:05,613 INFO L175 Difference]: Start difference. First operand has 285 places, 441 transitions, 5530 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:01:05,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 458 transitions, 6468 flow [2024-06-21 21:01:07,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 458 transitions, 6345 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-21 21:01:07,353 INFO L231 Difference]: Finished difference. Result has 289 places, 444 transitions, 5543 flow [2024-06-21 21:01:07,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5543, PETRI_PLACES=289, PETRI_TRANSITIONS=444} [2024-06-21 21:01:07,353 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 244 predicate places. [2024-06-21 21:01:07,353 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 444 transitions, 5543 flow [2024-06-21 21:01:07,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:07,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:07,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:07,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:01:07,354 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:07,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1561166132, now seen corresponding path program 5 times [2024-06-21 21:01:07,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:07,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835343957] [2024-06-21 21:01:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:07,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:08,602 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 21:01:08,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835343957] [2024-06-21 21:01:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835343957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:08,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:08,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:01:08,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598797445] [2024-06-21 21:01:08,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:08,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:01:08,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:08,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:01:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:01:08,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:08,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 444 transitions, 5543 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:08,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:08,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:08,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:10,274 INFO L124 PetriNetUnfolderBase]: 4077/6227 cut-off events. [2024-06-21 21:01:10,274 INFO L125 PetriNetUnfolderBase]: For 1402501/1402501 co-relation queries the response was YES. [2024-06-21 21:01:10,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71301 conditions, 6227 events. 4077/6227 cut-off events. For 1402501/1402501 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 33410 event pairs, 729 based on Foata normal form. 8/6232 useless extension candidates. Maximal degree in co-relation 71158. Up to 5109 conditions per place. [2024-06-21 21:01:10,353 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 310 selfloop transitions, 152 changer transitions 0/483 dead transitions. [2024-06-21 21:01:10,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 483 transitions, 6707 flow [2024-06-21 21:01:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:01:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:01:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:01:10,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-21 21:01:10,354 INFO L175 Difference]: Start difference. First operand has 289 places, 444 transitions, 5543 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:01:10,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 483 transitions, 6707 flow [2024-06-21 21:01:11,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 483 transitions, 6619 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:11,788 INFO L231 Difference]: Finished difference. Result has 294 places, 446 transitions, 5883 flow [2024-06-21 21:01:11,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5455, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5883, PETRI_PLACES=294, PETRI_TRANSITIONS=446} [2024-06-21 21:01:11,789 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-21 21:01:11,789 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 446 transitions, 5883 flow [2024-06-21 21:01:11,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:11,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:11,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:11,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:01:11,789 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:11,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash -231634514, now seen corresponding path program 6 times [2024-06-21 21:01:11,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:11,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649763096] [2024-06-21 21:01:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:11,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:13,021 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 21:01:13,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:13,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649763096] [2024-06-21 21:01:13,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649763096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:13,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:13,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:01:13,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523034272] [2024-06-21 21:01:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:13,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:01:13,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:13,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:01:13,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:01:13,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:13,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 446 transitions, 5883 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:13,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:13,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:13,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:14,824 INFO L124 PetriNetUnfolderBase]: 4262/6529 cut-off events. [2024-06-21 21:01:14,824 INFO L125 PetriNetUnfolderBase]: For 1549439/1549444 co-relation queries the response was YES. [2024-06-21 21:01:14,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78130 conditions, 6529 events. 4262/6529 cut-off events. For 1549439/1549444 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 35604 event pairs, 763 based on Foata normal form. 4/6523 useless extension candidates. Maximal degree in co-relation 77986. Up to 5151 conditions per place. [2024-06-21 21:01:14,916 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 315 selfloop transitions, 157 changer transitions 0/493 dead transitions. [2024-06-21 21:01:14,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 493 transitions, 7527 flow [2024-06-21 21:01:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:01:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:01:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 21:01:14,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-21 21:01:14,917 INFO L175 Difference]: Start difference. First operand has 294 places, 446 transitions, 5883 flow. Second operand 10 states and 194 transitions. [2024-06-21 21:01:14,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 493 transitions, 7527 flow [2024-06-21 21:01:16,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 493 transitions, 7119 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:16,617 INFO L231 Difference]: Finished difference. Result has 296 places, 450 transitions, 6032 flow [2024-06-21 21:01:16,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5475, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6032, PETRI_PLACES=296, PETRI_TRANSITIONS=450} [2024-06-21 21:01:16,618 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-21 21:01:16,618 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 450 transitions, 6032 flow [2024-06-21 21:01:16,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:16,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:16,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:16,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:01:16,619 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:16,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash -224954510, now seen corresponding path program 1 times [2024-06-21 21:01:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:16,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543599416] [2024-06-21 21:01:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:16,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:17,925 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 21:01:17,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:17,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543599416] [2024-06-21 21:01:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543599416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:17,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:01:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094616055] [2024-06-21 21:01:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:01:17,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:01:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:01:18,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:01:18,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 450 transitions, 6032 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:18,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:18,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:01:18,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:19,691 INFO L124 PetriNetUnfolderBase]: 4647/6979 cut-off events. [2024-06-21 21:01:19,691 INFO L125 PetriNetUnfolderBase]: For 1663379/1663379 co-relation queries the response was YES. [2024-06-21 21:01:19,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81022 conditions, 6979 events. 4647/6979 cut-off events. For 1663379/1663379 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 36975 event pairs, 860 based on Foata normal form. 24/7000 useless extension candidates. Maximal degree in co-relation 80877. Up to 5848 conditions per place. [2024-06-21 21:01:19,792 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 321 selfloop transitions, 166 changer transitions 0/498 dead transitions. [2024-06-21 21:01:19,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 498 transitions, 7292 flow [2024-06-21 21:01:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:01:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:01:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-21 21:01:19,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 21:01:19,794 INFO L175 Difference]: Start difference. First operand has 296 places, 450 transitions, 6032 flow. Second operand 11 states and 198 transitions. [2024-06-21 21:01:19,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 498 transitions, 7292 flow [2024-06-21 21:01:21,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 498 transitions, 6952 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:21,706 INFO L231 Difference]: Finished difference. Result has 300 places, 452 transitions, 6145 flow [2024-06-21 21:01:21,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5692, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6145, PETRI_PLACES=300, PETRI_TRANSITIONS=452} [2024-06-21 21:01:21,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 255 predicate places. [2024-06-21 21:01:21,707 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 452 transitions, 6145 flow [2024-06-21 21:01:21,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:21,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:21,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:21,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:01:21,707 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:21,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash -225200774, now seen corresponding path program 7 times [2024-06-21 21:01:21,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:21,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995633601] [2024-06-21 21:01:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:21,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:22,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:22,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995633601] [2024-06-21 21:01:22,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995633601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:22,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:22,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:01:22,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366452743] [2024-06-21 21:01:22,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:22,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:01:22,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:01:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:01:23,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:23,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 452 transitions, 6145 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:23,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:23,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:23,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:24,613 INFO L124 PetriNetUnfolderBase]: 4313/6617 cut-off events. [2024-06-21 21:01:24,613 INFO L125 PetriNetUnfolderBase]: For 1607124/1607124 co-relation queries the response was YES. [2024-06-21 21:01:24,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77405 conditions, 6617 events. 4313/6617 cut-off events. For 1607124/1607124 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 36243 event pairs, 762 based on Foata normal form. 28/6642 useless extension candidates. Maximal degree in co-relation 77259. Up to 5369 conditions per place. [2024-06-21 21:01:24,708 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 308 selfloop transitions, 164 changer transitions 0/493 dead transitions. [2024-06-21 21:01:24,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 493 transitions, 7249 flow [2024-06-21 21:01:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:01:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:01:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 21:01:24,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-21 21:01:24,709 INFO L175 Difference]: Start difference. First operand has 300 places, 452 transitions, 6145 flow. Second operand 10 states and 191 transitions. [2024-06-21 21:01:24,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 493 transitions, 7249 flow [2024-06-21 21:01:26,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 493 transitions, 6766 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-06-21 21:01:26,682 INFO L231 Difference]: Finished difference. Result has 301 places, 452 transitions, 6000 flow [2024-06-21 21:01:26,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5662, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6000, PETRI_PLACES=301, PETRI_TRANSITIONS=452} [2024-06-21 21:01:26,682 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-21 21:01:26,682 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 452 transitions, 6000 flow [2024-06-21 21:01:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:26,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:26,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:26,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:01:26,683 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:26,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash -402332294, now seen corresponding path program 8 times [2024-06-21 21:01:26,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:26,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791260994] [2024-06-21 21:01:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:26,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:27,924 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 21:01:27,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:27,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791260994] [2024-06-21 21:01:27,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791260994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:27,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:27,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:01:27,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264042478] [2024-06-21 21:01:27,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:27,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:01:27,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:27,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:01:27,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:01:28,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:28,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 452 transitions, 6000 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:28,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:28,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:28,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:29,640 INFO L124 PetriNetUnfolderBase]: 4326/6646 cut-off events. [2024-06-21 21:01:29,640 INFO L125 PetriNetUnfolderBase]: For 1550221/1550221 co-relation queries the response was YES. [2024-06-21 21:01:29,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76207 conditions, 6646 events. 4326/6646 cut-off events. For 1550221/1550221 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 36509 event pairs, 799 based on Foata normal form. 8/6651 useless extension candidates. Maximal degree in co-relation 76060. Up to 5508 conditions per place. [2024-06-21 21:01:29,736 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 329 selfloop transitions, 141 changer transitions 0/491 dead transitions. [2024-06-21 21:01:29,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 491 transitions, 7188 flow [2024-06-21 21:01:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:01:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:01:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 21:01:29,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-21 21:01:29,737 INFO L175 Difference]: Start difference. First operand has 301 places, 452 transitions, 6000 flow. Second operand 10 states and 189 transitions. [2024-06-21 21:01:29,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 491 transitions, 7188 flow [2024-06-21 21:01:31,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 491 transitions, 6847 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:01:31,611 INFO L231 Difference]: Finished difference. Result has 302 places, 454 transitions, 6073 flow [2024-06-21 21:01:31,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6073, PETRI_PLACES=302, PETRI_TRANSITIONS=454} [2024-06-21 21:01:31,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 257 predicate places. [2024-06-21 21:01:31,611 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 454 transitions, 6073 flow [2024-06-21 21:01:31,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:31,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:31,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:31,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:01:31,612 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:31,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -402336944, now seen corresponding path program 9 times [2024-06-21 21:01:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:31,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320407687] [2024-06-21 21:01:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:32,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320407687] [2024-06-21 21:01:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320407687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:32,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:32,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:01:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302141407] [2024-06-21 21:01:32,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:01:32,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:01:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:01:33,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:33,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 454 transitions, 6073 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:33,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:33,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:33,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:34,626 INFO L124 PetriNetUnfolderBase]: 4343/6683 cut-off events. [2024-06-21 21:01:34,626 INFO L125 PetriNetUnfolderBase]: For 1577427/1577427 co-relation queries the response was YES. [2024-06-21 21:01:34,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77032 conditions, 6683 events. 4343/6683 cut-off events. For 1577427/1577427 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 36861 event pairs, 799 based on Foata normal form. 4/6684 useless extension candidates. Maximal degree in co-relation 76884. Up to 5494 conditions per place. [2024-06-21 21:01:34,731 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 328 selfloop transitions, 144 changer transitions 0/493 dead transitions. [2024-06-21 21:01:34,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 493 transitions, 7267 flow [2024-06-21 21:01:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:01:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:01:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 21:01:34,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 21:01:34,733 INFO L175 Difference]: Start difference. First operand has 302 places, 454 transitions, 6073 flow. Second operand 10 states and 190 transitions. [2024-06-21 21:01:34,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 493 transitions, 7267 flow [2024-06-21 21:01:36,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 493 transitions, 6873 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:36,660 INFO L231 Difference]: Finished difference. Result has 304 places, 456 transitions, 6102 flow [2024-06-21 21:01:36,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5679, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6102, PETRI_PLACES=304, PETRI_TRANSITIONS=456} [2024-06-21 21:01:36,661 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 259 predicate places. [2024-06-21 21:01:36,661 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 456 transitions, 6102 flow [2024-06-21 21:01:36,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:36,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:36,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:36,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:01:36,661 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:36,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1731988532, now seen corresponding path program 10 times [2024-06-21 21:01:36,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:36,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649704052] [2024-06-21 21:01:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:36,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:37,897 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 21:01:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:37,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649704052] [2024-06-21 21:01:37,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649704052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:37,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:37,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:01:37,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340644336] [2024-06-21 21:01:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:37,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:01:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:01:37,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:01:38,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:38,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 456 transitions, 6102 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:38,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:38,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:38,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:39,563 INFO L124 PetriNetUnfolderBase]: 4376/6740 cut-off events. [2024-06-21 21:01:39,564 INFO L125 PetriNetUnfolderBase]: For 1628346/1628346 co-relation queries the response was YES. [2024-06-21 21:01:39,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78236 conditions, 6740 events. 4376/6740 cut-off events. For 1628346/1628346 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 37289 event pairs, 806 based on Foata normal form. 4/6741 useless extension candidates. Maximal degree in co-relation 78087. Up to 5249 conditions per place. [2024-06-21 21:01:39,666 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 323 selfloop transitions, 155 changer transitions 0/499 dead transitions. [2024-06-21 21:01:39,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 499 transitions, 7342 flow [2024-06-21 21:01:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:01:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:01:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 21:01:39,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 21:01:39,667 INFO L175 Difference]: Start difference. First operand has 304 places, 456 transitions, 6102 flow. Second operand 10 states and 193 transitions. [2024-06-21 21:01:39,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 499 transitions, 7342 flow [2024-06-21 21:01:41,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 499 transitions, 6937 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:41,632 INFO L231 Difference]: Finished difference. Result has 306 places, 458 transitions, 6146 flow [2024-06-21 21:01:41,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5697, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6146, PETRI_PLACES=306, PETRI_TRANSITIONS=458} [2024-06-21 21:01:41,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-21 21:01:41,633 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 458 transitions, 6146 flow [2024-06-21 21:01:41,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:41,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:41,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:41,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:01:41,633 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:41,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1725384620, now seen corresponding path program 1 times [2024-06-21 21:01:41,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:41,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25945364] [2024-06-21 21:01:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:41,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:42,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:42,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25945364] [2024-06-21 21:01:42,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25945364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:42,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:42,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:42,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641426569] [2024-06-21 21:01:42,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:42,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:42,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:01:42,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 458 transitions, 6146 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:42,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:42,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:01:42,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:44,153 INFO L124 PetriNetUnfolderBase]: 4605/6947 cut-off events. [2024-06-21 21:01:44,153 INFO L125 PetriNetUnfolderBase]: For 1648618/1648637 co-relation queries the response was YES. [2024-06-21 21:01:44,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78837 conditions, 6947 events. 4605/6947 cut-off events. For 1648618/1648637 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 37309 event pairs, 939 based on Foata normal form. 6/6908 useless extension candidates. Maximal degree in co-relation 78687. Up to 6458 conditions per place. [2024-06-21 21:01:44,257 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 376 selfloop transitions, 74 changer transitions 0/488 dead transitions. [2024-06-21 21:01:44,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 488 transitions, 7410 flow [2024-06-21 21:01:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:01:44,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 21:01:44,258 INFO L175 Difference]: Start difference. First operand has 306 places, 458 transitions, 6146 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:01:44,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 488 transitions, 7410 flow [2024-06-21 21:01:46,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 488 transitions, 6979 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:46,261 INFO L231 Difference]: Finished difference. Result has 306 places, 464 transitions, 5975 flow [2024-06-21 21:01:46,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5715, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5975, PETRI_PLACES=306, PETRI_TRANSITIONS=464} [2024-06-21 21:01:46,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-21 21:01:46,262 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 464 transitions, 5975 flow [2024-06-21 21:01:46,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:46,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:46,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:46,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:01:46,262 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:46,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:46,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1736484170, now seen corresponding path program 2 times [2024-06-21 21:01:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:46,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401287070] [2024-06-21 21:01:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:46,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:47,079 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 21:01:47,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:47,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401287070] [2024-06-21 21:01:47,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401287070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:47,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:47,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:47,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098419648] [2024-06-21 21:01:47,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:47,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:47,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:47,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:47,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:01:47,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 464 transitions, 5975 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:47,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:47,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:01:47,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:48,848 INFO L124 PetriNetUnfolderBase]: 4633/6981 cut-off events. [2024-06-21 21:01:48,848 INFO L125 PetriNetUnfolderBase]: For 1681690/1681705 co-relation queries the response was YES. [2024-06-21 21:01:48,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79107 conditions, 6981 events. 4633/6981 cut-off events. For 1681690/1681705 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37449 event pairs, 918 based on Foata normal form. 2/6938 useless extension candidates. Maximal degree in co-relation 78956. Up to 6483 conditions per place. [2024-06-21 21:01:48,952 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 377 selfloop transitions, 76 changer transitions 0/491 dead transitions. [2024-06-21 21:01:48,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 491 transitions, 7435 flow [2024-06-21 21:01:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:01:48,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-21 21:01:48,953 INFO L175 Difference]: Start difference. First operand has 306 places, 464 transitions, 5975 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:01:48,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 491 transitions, 7435 flow [2024-06-21 21:01:51,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 491 transitions, 7317 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:51,423 INFO L231 Difference]: Finished difference. Result has 310 places, 470 transitions, 6127 flow [2024-06-21 21:01:51,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5873, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6127, PETRI_PLACES=310, PETRI_TRANSITIONS=470} [2024-06-21 21:01:51,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-21 21:01:51,423 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 470 transitions, 6127 flow [2024-06-21 21:01:51,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:51,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:51,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:51,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:01:51,432 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:51,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash 549574558, now seen corresponding path program 3 times [2024-06-21 21:01:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:51,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052295527] [2024-06-21 21:01:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:51,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:52,214 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 21:01:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052295527] [2024-06-21 21:01:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052295527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:52,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:52,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:52,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338685708] [2024-06-21 21:01:52,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:52,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:52,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:52,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:52,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:52,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:01:52,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 470 transitions, 6127 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:52,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:52,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:01:52,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:53,928 INFO L124 PetriNetUnfolderBase]: 4627/6973 cut-off events. [2024-06-21 21:01:53,928 INFO L125 PetriNetUnfolderBase]: For 1705814/1705829 co-relation queries the response was YES. [2024-06-21 21:01:53,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79285 conditions, 6973 events. 4627/6973 cut-off events. For 1705814/1705829 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 37365 event pairs, 917 based on Foata normal form. 2/6930 useless extension candidates. Maximal degree in co-relation 79132. Up to 6478 conditions per place. [2024-06-21 21:01:54,028 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 375 selfloop transitions, 77 changer transitions 0/490 dead transitions. [2024-06-21 21:01:54,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 490 transitions, 7285 flow [2024-06-21 21:01:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:01:54,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 21:01:54,029 INFO L175 Difference]: Start difference. First operand has 310 places, 470 transitions, 6127 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:01:54,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 490 transitions, 7285 flow [2024-06-21 21:01:56,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 490 transitions, 7128 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:56,526 INFO L231 Difference]: Finished difference. Result has 314 places, 470 transitions, 6130 flow [2024-06-21 21:01:56,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6130, PETRI_PLACES=314, PETRI_TRANSITIONS=470} [2024-06-21 21:01:56,527 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-21 21:01:56,527 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 470 transitions, 6130 flow [2024-06-21 21:01:56,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:56,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:56,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:56,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:01:56,527 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:56,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash 549575023, now seen corresponding path program 1 times [2024-06-21 21:01:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:56,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147300471] [2024-06-21 21:01:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:56,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:57,313 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 21:01:57,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:57,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147300471] [2024-06-21 21:01:57,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147300471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:57,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:57,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:57,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575142180] [2024-06-21 21:01:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:57,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:57,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:57,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:01:57,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 470 transitions, 6130 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:57,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:57,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:01:57,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:59,098 INFO L124 PetriNetUnfolderBase]: 4630/6978 cut-off events. [2024-06-21 21:01:59,098 INFO L125 PetriNetUnfolderBase]: For 1734621/1734640 co-relation queries the response was YES. [2024-06-21 21:01:59,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79601 conditions, 6978 events. 4630/6978 cut-off events. For 1734621/1734640 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37370 event pairs, 955 based on Foata normal form. 5/6938 useless extension candidates. Maximal degree in co-relation 79447. Up to 6640 conditions per place. [2024-06-21 21:01:59,202 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 417 selfloop transitions, 40 changer transitions 0/495 dead transitions. [2024-06-21 21:01:59,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 495 transitions, 7406 flow [2024-06-21 21:01:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:01:59,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-21 21:01:59,203 INFO L175 Difference]: Start difference. First operand has 314 places, 470 transitions, 6130 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:01:59,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 495 transitions, 7406 flow [2024-06-21 21:02:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 495 transitions, 7244 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:02,048 INFO L231 Difference]: Finished difference. Result has 316 places, 479 transitions, 6197 flow [2024-06-21 21:02:02,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5968, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6197, PETRI_PLACES=316, PETRI_TRANSITIONS=479} [2024-06-21 21:02:02,048 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-21 21:02:02,048 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 479 transitions, 6197 flow [2024-06-21 21:02:02,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:02,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:02,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:02,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:02:02,049 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:02,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:02,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2102267487, now seen corresponding path program 3 times [2024-06-21 21:02:02,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:02,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806154100] [2024-06-21 21:02:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:02,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:02,832 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 21:02:02,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:02,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806154100] [2024-06-21 21:02:02,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806154100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:02,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:02,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:02:02,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167665743] [2024-06-21 21:02:02,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:02,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:02:02,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:02:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:02:02,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:02,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 479 transitions, 6197 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:02:02,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:02,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:02,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:04,299 INFO L124 PetriNetUnfolderBase]: 4495/6846 cut-off events. [2024-06-21 21:02:04,300 INFO L125 PetriNetUnfolderBase]: For 1772729/1772756 co-relation queries the response was YES. [2024-06-21 21:02:04,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79530 conditions, 6846 events. 4495/6846 cut-off events. For 1772729/1772756 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37262 event pairs, 917 based on Foata normal form. 9/6806 useless extension candidates. Maximal degree in co-relation 79374. Up to 6316 conditions per place. [2024-06-21 21:02:04,404 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 406 selfloop transitions, 46 changer transitions 0/502 dead transitions. [2024-06-21 21:02:04,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 502 transitions, 7691 flow [2024-06-21 21:02:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:02:04,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 21:02:04,405 INFO L175 Difference]: Start difference. First operand has 316 places, 479 transitions, 6197 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:02:04,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 502 transitions, 7691 flow [2024-06-21 21:02:06,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 502 transitions, 7623 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 21:02:06,667 INFO L231 Difference]: Finished difference. Result has 320 places, 485 transitions, 6381 flow [2024-06-21 21:02:06,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6381, PETRI_PLACES=320, PETRI_TRANSITIONS=485} [2024-06-21 21:02:06,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-21 21:02:06,667 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 485 transitions, 6381 flow [2024-06-21 21:02:06,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 21:02:06,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:06,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:06,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:02:06,668 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:06,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2102712957, now seen corresponding path program 4 times [2024-06-21 21:02:06,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:06,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86582295] [2024-06-21 21:02:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:06,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:07,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:07,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86582295] [2024-06-21 21:02:07,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86582295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:07,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:07,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:02:07,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290492931] [2024-06-21 21:02:07,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:07,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:02:07,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:02:07,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:02:07,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:07,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 485 transitions, 6381 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:07,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:07,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:07,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:09,061 INFO L124 PetriNetUnfolderBase]: 4500/6853 cut-off events. [2024-06-21 21:02:09,061 INFO L125 PetriNetUnfolderBase]: For 1810383/1810410 co-relation queries the response was YES. [2024-06-21 21:02:09,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80444 conditions, 6853 events. 4500/6853 cut-off events. For 1810383/1810410 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 37325 event pairs, 908 based on Foata normal form. 9/6813 useless extension candidates. Maximal degree in co-relation 80285. Up to 6322 conditions per place. [2024-06-21 21:02:09,165 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 400 selfloop transitions, 51 changer transitions 0/501 dead transitions. [2024-06-21 21:02:09,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 501 transitions, 7599 flow [2024-06-21 21:02:09,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:02:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:02:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:02:09,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-21 21:02:09,166 INFO L175 Difference]: Start difference. First operand has 320 places, 485 transitions, 6381 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:02:09,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 501 transitions, 7599 flow [2024-06-21 21:02:11,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 501 transitions, 7422 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-21 21:02:11,550 INFO L231 Difference]: Finished difference. Result has 325 places, 488 transitions, 6392 flow [2024-06-21 21:02:11,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6392, PETRI_PLACES=325, PETRI_TRANSITIONS=488} [2024-06-21 21:02:11,550 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-21 21:02:11,551 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 488 transitions, 6392 flow [2024-06-21 21:02:11,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:11,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:11,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:11,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:02:11,551 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:11,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash -223356583, now seen corresponding path program 5 times [2024-06-21 21:02:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:11,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187319670] [2024-06-21 21:02:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:12,352 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 21:02:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:12,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187319670] [2024-06-21 21:02:12,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187319670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:12,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:12,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:02:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123340315] [2024-06-21 21:02:12,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:12,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:02:12,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:02:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:02:12,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:12,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 488 transitions, 6392 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:12,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:12,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:12,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:13,878 INFO L124 PetriNetUnfolderBase]: 4497/6849 cut-off events. [2024-06-21 21:02:13,878 INFO L125 PetriNetUnfolderBase]: For 1838486/1838513 co-relation queries the response was YES. [2024-06-21 21:02:13,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80628 conditions, 6849 events. 4497/6849 cut-off events. For 1838486/1838513 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 37297 event pairs, 914 based on Foata normal form. 9/6809 useless extension candidates. Maximal degree in co-relation 80467. Up to 6366 conditions per place. [2024-06-21 21:02:13,983 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 414 selfloop transitions, 34 changer transitions 0/498 dead transitions. [2024-06-21 21:02:13,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 498 transitions, 7514 flow [2024-06-21 21:02:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:02:13,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 21:02:13,985 INFO L175 Difference]: Start difference. First operand has 325 places, 488 transitions, 6392 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:02:13,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 498 transitions, 7514 flow [2024-06-21 21:02:16,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 498 transitions, 7378 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:02:16,783 INFO L231 Difference]: Finished difference. Result has 327 places, 488 transitions, 6330 flow [2024-06-21 21:02:16,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6256, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6330, PETRI_PLACES=327, PETRI_TRANSITIONS=488} [2024-06-21 21:02:16,784 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-21 21:02:16,784 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 488 transitions, 6330 flow [2024-06-21 21:02:16,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:16,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:16,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:16,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:02:16,785 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:16,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1664099127, now seen corresponding path program 6 times [2024-06-21 21:02:16,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:16,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279777707] [2024-06-21 21:02:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:16,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:17,541 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 21:02:17,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:17,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279777707] [2024-06-21 21:02:17,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279777707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:17,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:17,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:02:17,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142961038] [2024-06-21 21:02:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:17,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:02:17,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:02:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:02:17,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:17,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 488 transitions, 6330 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:17,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:17,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:17,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:19,102 INFO L124 PetriNetUnfolderBase]: 4496/6847 cut-off events. [2024-06-21 21:02:19,102 INFO L125 PetriNetUnfolderBase]: For 1867041/1867068 co-relation queries the response was YES. [2024-06-21 21:02:19,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80759 conditions, 6847 events. 4496/6847 cut-off events. For 1867041/1867068 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 37255 event pairs, 916 based on Foata normal form. 9/6807 useless extension candidates. Maximal degree in co-relation 80597. Up to 6372 conditions per place. [2024-06-21 21:02:19,205 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 421 selfloop transitions, 26 changer transitions 0/497 dead transitions. [2024-06-21 21:02:19,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 497 transitions, 7250 flow [2024-06-21 21:02:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:02:19,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37987012987012986 [2024-06-21 21:02:19,206 INFO L175 Difference]: Start difference. First operand has 327 places, 488 transitions, 6330 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:02:19,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 497 transitions, 7250 flow [2024-06-21 21:02:21,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 497 transitions, 7114 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:02:21,991 INFO L231 Difference]: Finished difference. Result has 328 places, 488 transitions, 6252 flow [2024-06-21 21:02:21,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6252, PETRI_PLACES=328, PETRI_TRANSITIONS=488} [2024-06-21 21:02:21,991 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-21 21:02:21,991 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 488 transitions, 6252 flow [2024-06-21 21:02:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:21,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:21,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:21,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:02:21,992 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:21,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash 667759070, now seen corresponding path program 11 times [2024-06-21 21:02:21,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:21,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80495804] [2024-06-21 21:02:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:21,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:23,210 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 21:02:23,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:23,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80495804] [2024-06-21 21:02:23,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80495804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:23,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:23,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:02:23,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321379790] [2024-06-21 21:02:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:23,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:02:23,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:02:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:02:23,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:23,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 488 transitions, 6252 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:23,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:23,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:23,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:24,977 INFO L124 PetriNetUnfolderBase]: 4439/6838 cut-off events. [2024-06-21 21:02:24,977 INFO L125 PetriNetUnfolderBase]: For 1927542/1927548 co-relation queries the response was YES. [2024-06-21 21:02:25,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82048 conditions, 6838 events. 4439/6838 cut-off events. For 1927542/1927548 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37903 event pairs, 763 based on Foata normal form. 12/6831 useless extension candidates. Maximal degree in co-relation 81885. Up to 5065 conditions per place. [2024-06-21 21:02:25,091 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 262 selfloop transitions, 241 changer transitions 0/528 dead transitions. [2024-06-21 21:02:25,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 528 transitions, 7866 flow [2024-06-21 21:02:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 21:02:25,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-21 21:02:25,092 INFO L175 Difference]: Start difference. First operand has 328 places, 488 transitions, 6252 flow. Second operand 10 states and 194 transitions. [2024-06-21 21:02:25,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 528 transitions, 7866 flow [2024-06-21 21:02:27,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 528 transitions, 7786 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:27,998 INFO L231 Difference]: Finished difference. Result has 331 places, 490 transitions, 6798 flow [2024-06-21 21:02:27,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6798, PETRI_PLACES=331, PETRI_TRANSITIONS=490} [2024-06-21 21:02:27,998 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-21 21:02:27,999 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 490 transitions, 6798 flow [2024-06-21 21:02:27,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:27,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:27,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:27,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:02:27,999 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:27,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash 667581440, now seen corresponding path program 12 times [2024-06-21 21:02:27,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:27,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798073167] [2024-06-21 21:02:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:27,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:29,334 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 21:02:29,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798073167] [2024-06-21 21:02:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798073167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:29,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:02:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212962426] [2024-06-21 21:02:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:02:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:02:29,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:02:29,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:29,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 490 transitions, 6798 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:29,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:29,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:29,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:31,143 INFO L124 PetriNetUnfolderBase]: 4624/7145 cut-off events. [2024-06-21 21:02:31,143 INFO L125 PetriNetUnfolderBase]: For 2118789/2118795 co-relation queries the response was YES. [2024-06-21 21:02:31,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90118 conditions, 7145 events. 4624/7145 cut-off events. For 2118789/2118795 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 40110 event pairs, 797 based on Foata normal form. 8/7134 useless extension candidates. Maximal degree in co-relation 89954. Up to 5077 conditions per place. [2024-06-21 21:02:31,260 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 267 selfloop transitions, 246 changer transitions 0/538 dead transitions. [2024-06-21 21:02:31,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 538 transitions, 8962 flow [2024-06-21 21:02:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 21:02:31,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 21:02:31,262 INFO L175 Difference]: Start difference. First operand has 331 places, 490 transitions, 6798 flow. Second operand 10 states and 200 transitions. [2024-06-21 21:02:31,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 538 transitions, 8962 flow [2024-06-21 21:02:34,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 538 transitions, 8356 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:34,408 INFO L231 Difference]: Finished difference. Result has 333 places, 494 transitions, 6967 flow [2024-06-21 21:02:34,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6967, PETRI_PLACES=333, PETRI_TRANSITIONS=494} [2024-06-21 21:02:34,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-21 21:02:34,408 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 494 transitions, 6967 flow [2024-06-21 21:02:34,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:34,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:34,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:34,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:02:34,408 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:34,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 674015180, now seen corresponding path program 13 times [2024-06-21 21:02:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:34,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120667314] [2024-06-21 21:02:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:34,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:35,643 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 21:02:35,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120667314] [2024-06-21 21:02:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120667314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:35,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:35,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:02:35,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429420862] [2024-06-21 21:02:35,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:35,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:02:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:02:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:02:35,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:35,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 494 transitions, 6967 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:35,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:35,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:35,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:37,528 INFO L124 PetriNetUnfolderBase]: 4720/7306 cut-off events. [2024-06-21 21:02:37,528 INFO L125 PetriNetUnfolderBase]: For 2281704/2281715 co-relation queries the response was YES. [2024-06-21 21:02:37,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92269 conditions, 7306 events. 4720/7306 cut-off events. For 2281704/2281715 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 41403 event pairs, 819 based on Foata normal form. 32/7312 useless extension candidates. Maximal degree in co-relation 92104. Up to 5411 conditions per place. [2024-06-21 21:02:37,650 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 280 selfloop transitions, 233 changer transitions 0/538 dead transitions. [2024-06-21 21:02:37,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 538 transitions, 8651 flow [2024-06-21 21:02:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 21:02:37,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-21 21:02:37,651 INFO L175 Difference]: Start difference. First operand has 333 places, 494 transitions, 6967 flow. Second operand 10 states and 199 transitions. [2024-06-21 21:02:37,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 538 transitions, 8651 flow [2024-06-21 21:02:41,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 538 transitions, 8146 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:41,298 INFO L231 Difference]: Finished difference. Result has 335 places, 496 transitions, 7082 flow [2024-06-21 21:02:41,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6480, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7082, PETRI_PLACES=335, PETRI_TRANSITIONS=496} [2024-06-21 21:02:41,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-21 21:02:41,298 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 496 transitions, 7082 flow [2024-06-21 21:02:41,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:41,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:41,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:41,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:02:41,299 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:41,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:41,299 INFO L85 PathProgramCache]: Analyzing trace with hash 674261444, now seen corresponding path program 2 times [2024-06-21 21:02:41,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:41,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542536402] [2024-06-21 21:02:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:41,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:42,653 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 21:02:42,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:42,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542536402] [2024-06-21 21:02:42,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542536402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:42,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:42,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:02:42,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151570853] [2024-06-21 21:02:42,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:42,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:02:42,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:02:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:02:42,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:02:42,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 496 transitions, 7082 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:42,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:42,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:02:42,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:44,718 INFO L124 PetriNetUnfolderBase]: 5177/7828 cut-off events. [2024-06-21 21:02:44,718 INFO L125 PetriNetUnfolderBase]: For 2302387/2302393 co-relation queries the response was YES. [2024-06-21 21:02:44,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95052 conditions, 7828 events. 5177/7828 cut-off events. For 2302387/2302393 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 42910 event pairs, 934 based on Foata normal form. 28/7837 useless extension candidates. Maximal degree in co-relation 94887. Up to 6214 conditions per place. [2024-06-21 21:02:44,832 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 313 selfloop transitions, 215 changer transitions 0/543 dead transitions. [2024-06-21 21:02:44,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 543 transitions, 8442 flow [2024-06-21 21:02:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 21:02:44,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214876033057851 [2024-06-21 21:02:44,833 INFO L175 Difference]: Start difference. First operand has 335 places, 496 transitions, 7082 flow. Second operand 11 states and 204 transitions. [2024-06-21 21:02:44,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 543 transitions, 8442 flow [2024-06-21 21:02:48,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 543 transitions, 7888 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:48,197 INFO L231 Difference]: Finished difference. Result has 338 places, 498 transitions, 7097 flow [2024-06-21 21:02:48,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6528, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7097, PETRI_PLACES=338, PETRI_TRANSITIONS=498} [2024-06-21 21:02:48,197 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-21 21:02:48,197 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 498 transitions, 7097 flow [2024-06-21 21:02:48,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:48,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:48,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:48,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:02:48,198 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:48,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash 331061862, now seen corresponding path program 3 times [2024-06-21 21:02:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:48,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292593023] [2024-06-21 21:02:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:48,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:49,554 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 21:02:49,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:49,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292593023] [2024-06-21 21:02:49,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292593023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:49,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:49,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:02:49,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344664131] [2024-06-21 21:02:49,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:49,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:02:49,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:49,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:02:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:02:49,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:02:49,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 498 transitions, 7097 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:49,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:49,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:02:49,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:51,671 INFO L124 PetriNetUnfolderBase]: 5194/7853 cut-off events. [2024-06-21 21:02:51,671 INFO L125 PetriNetUnfolderBase]: For 2247901/2247913 co-relation queries the response was YES. [2024-06-21 21:02:51,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95067 conditions, 7853 events. 5194/7853 cut-off events. For 2247901/2247913 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43138 event pairs, 1071 based on Foata normal form. 12/7858 useless extension candidates. Maximal degree in co-relation 94901. Up to 7401 conditions per place. [2024-06-21 21:02:51,803 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 439 selfloop transitions, 85 changer transitions 0/539 dead transitions. [2024-06-21 21:02:51,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 539 transitions, 8409 flow [2024-06-21 21:02:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:02:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:02:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-21 21:02:51,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-21 21:02:51,804 INFO L175 Difference]: Start difference. First operand has 338 places, 498 transitions, 7097 flow. Second operand 12 states and 200 transitions. [2024-06-21 21:02:51,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 539 transitions, 8409 flow [2024-06-21 21:02:55,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 539 transitions, 7880 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-21 21:02:55,122 INFO L231 Difference]: Finished difference. Result has 341 places, 500 transitions, 6879 flow [2024-06-21 21:02:55,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6568, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6879, PETRI_PLACES=341, PETRI_TRANSITIONS=500} [2024-06-21 21:02:55,123 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-21 21:02:55,123 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 500 transitions, 6879 flow [2024-06-21 21:02:55,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:55,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:55,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:55,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:02:55,123 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:55,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:55,124 INFO L85 PathProgramCache]: Analyzing trace with hash 331418052, now seen corresponding path program 4 times [2024-06-21 21:02:55,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:55,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269874951] [2024-06-21 21:02:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:55,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:56,505 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 21:02:56,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:56,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269874951] [2024-06-21 21:02:56,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269874951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:56,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:56,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:02:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600223055] [2024-06-21 21:02:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:56,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:02:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:02:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:02:56,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:02:56,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 500 transitions, 6879 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:56,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:56,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:02:56,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:58,649 INFO L124 PetriNetUnfolderBase]: 5322/8063 cut-off events. [2024-06-21 21:02:58,649 INFO L125 PetriNetUnfolderBase]: For 2385831/2385837 co-relation queries the response was YES. [2024-06-21 21:02:58,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98300 conditions, 8063 events. 5322/8063 cut-off events. For 2385831/2385837 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 44619 event pairs, 833 based on Foata normal form. 8/8052 useless extension candidates. Maximal degree in co-relation 98133. Up to 5818 conditions per place. [2024-06-21 21:02:58,782 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 264 selfloop transitions, 276 changer transitions 0/555 dead transitions. [2024-06-21 21:02:58,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 555 transitions, 9163 flow [2024-06-21 21:02:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 21:02:58,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256198347107438 [2024-06-21 21:02:58,783 INFO L175 Difference]: Start difference. First operand has 341 places, 500 transitions, 6879 flow. Second operand 11 states and 206 transitions. [2024-06-21 21:02:58,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 555 transitions, 9163 flow [2024-06-21 21:03:02,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 555 transitions, 8870 flow, removed 63 selfloop flow, removed 10 redundant places. [2024-06-21 21:03:02,644 INFO L231 Difference]: Finished difference. Result has 342 places, 506 transitions, 7437 flow [2024-06-21 21:03:02,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6586, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7437, PETRI_PLACES=342, PETRI_TRANSITIONS=506} [2024-06-21 21:03:02,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-21 21:03:02,644 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 506 transitions, 7437 flow [2024-06-21 21:03:02,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:02,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:02,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:03:02,645 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:02,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 320933852, now seen corresponding path program 1 times [2024-06-21 21:03:02,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:02,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52342248] [2024-06-21 21:03:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:02,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:03,953 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 21:03:03,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52342248] [2024-06-21 21:03:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52342248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:03,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:03,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:03:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149125494] [2024-06-21 21:03:03,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:03,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:03:03,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:03,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:03:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:03:04,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:03:04,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 506 transitions, 7437 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:04,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:04,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:03:04,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:06,183 INFO L124 PetriNetUnfolderBase]: 5334/8081 cut-off events. [2024-06-21 21:03:06,184 INFO L125 PetriNetUnfolderBase]: For 2406187/2406193 co-relation queries the response was YES. [2024-06-21 21:03:06,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99335 conditions, 8081 events. 5334/8081 cut-off events. For 2406187/2406193 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 44842 event pairs, 941 based on Foata normal form. 8/8070 useless extension candidates. Maximal degree in co-relation 99167. Up to 6318 conditions per place. [2024-06-21 21:03:06,305 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 273 selfloop transitions, 261 changer transitions 0/549 dead transitions. [2024-06-21 21:03:06,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 549 transitions, 8669 flow [2024-06-21 21:03:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:03:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:03:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-21 21:03:06,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41115702479338845 [2024-06-21 21:03:06,306 INFO L175 Difference]: Start difference. First operand has 342 places, 506 transitions, 7437 flow. Second operand 11 states and 199 transitions. [2024-06-21 21:03:06,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 549 transitions, 8669 flow [2024-06-21 21:03:10,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 549 transitions, 8117 flow, removed 111 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:10,732 INFO L231 Difference]: Finished difference. Result has 346 places, 509 transitions, 7437 flow [2024-06-21 21:03:10,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6885, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7437, PETRI_PLACES=346, PETRI_TRANSITIONS=509} [2024-06-21 21:03:10,732 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-21 21:03:10,732 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 509 transitions, 7437 flow [2024-06-21 21:03:10,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:10,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:10,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:10,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:03:10,733 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:10,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:10,733 INFO L85 PathProgramCache]: Analyzing trace with hash 35842662, now seen corresponding path program 5 times [2024-06-21 21:03:10,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:10,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940021827] [2024-06-21 21:03:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:10,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:12,100 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 21:03:12,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:12,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940021827] [2024-06-21 21:03:12,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940021827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:12,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:12,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:03:12,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215653037] [2024-06-21 21:03:12,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:12,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:03:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:03:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:03:12,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:03:12,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 509 transitions, 7437 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:12,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:12,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:03:12,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:14,338 INFO L124 PetriNetUnfolderBase]: 5426/8233 cut-off events. [2024-06-21 21:03:14,338 INFO L125 PetriNetUnfolderBase]: For 2532438/2532444 co-relation queries the response was YES. [2024-06-21 21:03:14,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100561 conditions, 8233 events. 5426/8233 cut-off events. For 2532438/2532444 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 45958 event pairs, 962 based on Foata normal form. 28/8242 useless extension candidates. Maximal degree in co-relation 100394. Up to 6629 conditions per place. [2024-06-21 21:03:14,472 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 306 selfloop transitions, 235 changer transitions 0/556 dead transitions. [2024-06-21 21:03:14,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 556 transitions, 8801 flow [2024-06-21 21:03:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:03:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:03:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 21:03:14,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194214876033058 [2024-06-21 21:03:14,474 INFO L175 Difference]: Start difference. First operand has 346 places, 509 transitions, 7437 flow. Second operand 11 states and 203 transitions. [2024-06-21 21:03:14,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 556 transitions, 8801 flow [2024-06-21 21:03:18,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 556 transitions, 8280 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:03:18,481 INFO L231 Difference]: Finished difference. Result has 348 places, 511 transitions, 7503 flow [2024-06-21 21:03:18,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6916, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7503, PETRI_PLACES=348, PETRI_TRANSITIONS=511} [2024-06-21 21:03:18,481 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 303 predicate places. [2024-06-21 21:03:18,481 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 511 transitions, 7503 flow [2024-06-21 21:03:18,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:18,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:18,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:18,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:03:18,482 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:18,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 704740776, now seen corresponding path program 14 times [2024-06-21 21:03:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:18,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990464336] [2024-06-21 21:03:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:19,878 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 21:03:19,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990464336] [2024-06-21 21:03:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990464336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:19,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:19,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:03:19,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960655413] [2024-06-21 21:03:19,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:19,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:03:19,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:03:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:03:20,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:20,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 511 transitions, 7503 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:20,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:20,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:20,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:22,219 INFO L124 PetriNetUnfolderBase]: 5005/7774 cut-off events. [2024-06-21 21:03:22,220 INFO L125 PetriNetUnfolderBase]: For 2473525/2473541 co-relation queries the response was YES. [2024-06-21 21:03:22,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96034 conditions, 7774 events. 5005/7774 cut-off events. For 2473525/2473541 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 44965 event pairs, 828 based on Foata normal form. 32/7773 useless extension candidates. Maximal degree in co-relation 95866. Up to 5865 conditions per place. [2024-06-21 21:03:22,333 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 267 selfloop transitions, 259 changer transitions 0/551 dead transitions. [2024-06-21 21:03:22,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 551 transitions, 8715 flow [2024-06-21 21:03:22,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 21:03:22,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 21:03:22,334 INFO L175 Difference]: Start difference. First operand has 348 places, 511 transitions, 7503 flow. Second operand 10 states and 195 transitions. [2024-06-21 21:03:22,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 551 transitions, 8715 flow [2024-06-21 21:03:26,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 551 transitions, 8086 flow, removed 82 selfloop flow, removed 9 redundant places. [2024-06-21 21:03:26,167 INFO L231 Difference]: Finished difference. Result has 349 places, 511 transitions, 7405 flow [2024-06-21 21:03:26,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7405, PETRI_PLACES=349, PETRI_TRANSITIONS=511} [2024-06-21 21:03:26,167 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-21 21:03:26,167 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 511 transitions, 7405 flow [2024-06-21 21:03:26,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:26,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:26,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:26,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:03:26,167 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:26,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 704342126, now seen corresponding path program 15 times [2024-06-21 21:03:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:26,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9241872] [2024-06-21 21:03:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:26,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:27,531 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 21:03:27,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:27,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9241872] [2024-06-21 21:03:27,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9241872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:27,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:27,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:03:27,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215933504] [2024-06-21 21:03:27,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:03:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:03:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:03:27,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:27,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 511 transitions, 7405 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:27,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:27,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:27,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:29,600 INFO L124 PetriNetUnfolderBase]: 5109/7948 cut-off events. [2024-06-21 21:03:29,600 INFO L125 PetriNetUnfolderBase]: For 2509400/2509416 co-relation queries the response was YES. [2024-06-21 21:03:29,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96936 conditions, 7948 events. 5109/7948 cut-off events. For 2509400/2509416 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 46373 event pairs, 897 based on Foata normal form. 32/7947 useless extension candidates. Maximal degree in co-relation 96767. Up to 6054 conditions per place. [2024-06-21 21:03:29,733 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 303 selfloop transitions, 225 changer transitions 0/553 dead transitions. [2024-06-21 21:03:29,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 553 transitions, 8763 flow [2024-06-21 21:03:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 21:03:29,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:03:29,734 INFO L175 Difference]: Start difference. First operand has 349 places, 511 transitions, 7405 flow. Second operand 10 states and 198 transitions. [2024-06-21 21:03:29,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 553 transitions, 8763 flow [2024-06-21 21:03:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 553 transitions, 8220 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 21:03:33,258 INFO L231 Difference]: Finished difference. Result has 350 places, 513 transitions, 7468 flow [2024-06-21 21:03:33,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6862, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7468, PETRI_PLACES=350, PETRI_TRANSITIONS=513} [2024-06-21 21:03:33,258 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-21 21:03:33,259 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 513 transitions, 7468 flow [2024-06-21 21:03:33,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:33,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:33,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:33,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:03:33,259 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:33,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 704588390, now seen corresponding path program 6 times [2024-06-21 21:03:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:33,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354009999] [2024-06-21 21:03:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354009999] [2024-06-21 21:03:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354009999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:34,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:34,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:03:34,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458302343] [2024-06-21 21:03:34,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:34,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:03:34,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:03:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:03:34,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:03:34,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 513 transitions, 7468 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:34,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:34,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:03:34,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:36,788 INFO L124 PetriNetUnfolderBase]: 5550/8445 cut-off events. [2024-06-21 21:03:36,788 INFO L125 PetriNetUnfolderBase]: For 2529217/2529223 co-relation queries the response was YES. [2024-06-21 21:03:36,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99153 conditions, 8445 events. 5550/8445 cut-off events. For 2529217/2529223 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 47691 event pairs, 1028 based on Foata normal form. 28/8454 useless extension candidates. Maximal degree in co-relation 98983. Up to 6821 conditions per place. [2024-06-21 21:03:36,927 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 340 selfloop transitions, 204 changer transitions 0/559 dead transitions. [2024-06-21 21:03:36,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 559 transitions, 8820 flow [2024-06-21 21:03:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:03:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:03:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 21:03:36,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355371900826444 [2024-06-21 21:03:36,928 INFO L175 Difference]: Start difference. First operand has 350 places, 513 transitions, 7468 flow. Second operand 11 states and 205 transitions. [2024-06-21 21:03:36,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 559 transitions, 8820 flow [2024-06-21 21:03:40,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 559 transitions, 8258 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-21 21:03:40,879 INFO L231 Difference]: Finished difference. Result has 353 places, 514 transitions, 7411 flow [2024-06-21 21:03:40,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6906, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7411, PETRI_PLACES=353, PETRI_TRANSITIONS=514} [2024-06-21 21:03:40,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-21 21:03:40,880 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 514 transitions, 7411 flow [2024-06-21 21:03:40,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:40,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:40,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:40,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:03:40,880 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:40,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash 697913036, now seen corresponding path program 16 times [2024-06-21 21:03:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:40,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085803831] [2024-06-21 21:03:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:42,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:42,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085803831] [2024-06-21 21:03:42,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085803831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:42,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:42,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:03:42,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900054350] [2024-06-21 21:03:42,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:42,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:03:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:03:42,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:03:42,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:42,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 514 transitions, 7411 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:42,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:42,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:42,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:44,458 INFO L124 PetriNetUnfolderBase]: 5197/8103 cut-off events. [2024-06-21 21:03:44,458 INFO L125 PetriNetUnfolderBase]: For 2457718/2457729 co-relation queries the response was YES. [2024-06-21 21:03:44,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97075 conditions, 8103 events. 5197/8103 cut-off events. For 2457718/2457729 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 47665 event pairs, 908 based on Foata normal form. 12/8089 useless extension candidates. Maximal degree in co-relation 96904. Up to 6306 conditions per place. [2024-06-21 21:03:44,595 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 302 selfloop transitions, 225 changer transitions 0/552 dead transitions. [2024-06-21 21:03:44,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 552 transitions, 8737 flow [2024-06-21 21:03:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 21:03:44,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 21:03:44,596 INFO L175 Difference]: Start difference. First operand has 353 places, 514 transitions, 7411 flow. Second operand 10 states and 195 transitions. [2024-06-21 21:03:44,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 552 transitions, 8737 flow [2024-06-21 21:03:49,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 552 transitions, 8252 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-21 21:03:49,209 INFO L231 Difference]: Finished difference. Result has 354 places, 516 transitions, 7534 flow [2024-06-21 21:03:49,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7534, PETRI_PLACES=354, PETRI_TRANSITIONS=516} [2024-06-21 21:03:49,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-21 21:03:49,209 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 516 transitions, 7534 flow [2024-06-21 21:03:49,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:49,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:49,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:49,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:03:49,209 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:49,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash 697908386, now seen corresponding path program 17 times [2024-06-21 21:03:49,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:49,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711134182] [2024-06-21 21:03:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:49,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:50,638 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 21:03:50,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:50,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711134182] [2024-06-21 21:03:50,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711134182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:50,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:50,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:03:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330751383] [2024-06-21 21:03:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:03:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:03:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:03:50,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:50,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 516 transitions, 7534 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:50,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:50,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:50,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:52,735 INFO L124 PetriNetUnfolderBase]: 5230/8160 cut-off events. [2024-06-21 21:03:52,736 INFO L125 PetriNetUnfolderBase]: For 2495657/2495668 co-relation queries the response was YES. [2024-06-21 21:03:52,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98139 conditions, 8160 events. 5230/8160 cut-off events. For 2495657/2495668 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 48130 event pairs, 910 based on Foata normal form. 8/8142 useless extension candidates. Maximal degree in co-relation 97967. Up to 6161 conditions per place. [2024-06-21 21:03:52,880 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 303 selfloop transitions, 230 changer transitions 0/558 dead transitions. [2024-06-21 21:03:52,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 558 transitions, 8908 flow [2024-06-21 21:03:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 21:03:52,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-21 21:03:52,881 INFO L175 Difference]: Start difference. First operand has 354 places, 516 transitions, 7534 flow. Second operand 10 states and 199 transitions. [2024-06-21 21:03:52,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 558 transitions, 8908 flow [2024-06-21 21:03:57,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 558 transitions, 8320 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-21 21:03:57,818 INFO L231 Difference]: Finished difference. Result has 356 places, 518 transitions, 7567 flow [2024-06-21 21:03:57,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7567, PETRI_PLACES=356, PETRI_TRANSITIONS=518} [2024-06-21 21:03:57,818 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-21 21:03:57,818 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 518 transitions, 7567 flow [2024-06-21 21:03:57,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:57,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:57,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:57,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:03:57,819 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:57,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:57,819 INFO L85 PathProgramCache]: Analyzing trace with hash 527210606, now seen corresponding path program 18 times [2024-06-21 21:03:57,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:57,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732046723] [2024-06-21 21:03:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:57,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:59,027 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 21:03:59,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732046723] [2024-06-21 21:03:59,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732046723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:59,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:59,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:03:59,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70912601] [2024-06-21 21:03:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:59,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:03:59,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:03:59,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:03:59,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:59,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 518 transitions, 7567 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:59,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:59,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:59,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:01,533 INFO L124 PetriNetUnfolderBase]: 5243/8189 cut-off events. [2024-06-21 21:04:01,533 INFO L125 PetriNetUnfolderBase]: For 2537749/2537760 co-relation queries the response was YES. [2024-06-21 21:04:01,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98237 conditions, 8189 events. 5243/8189 cut-off events. For 2537749/2537760 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 48435 event pairs, 903 based on Foata normal form. 12/8175 useless extension candidates. Maximal degree in co-relation 98064. Up to 6377 conditions per place. [2024-06-21 21:04:01,660 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 292 selfloop transitions, 239 changer transitions 0/556 dead transitions. [2024-06-21 21:04:01,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 556 transitions, 8909 flow [2024-06-21 21:04:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 21:04:01,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 21:04:01,661 INFO L175 Difference]: Start difference. First operand has 356 places, 518 transitions, 7567 flow. Second operand 10 states and 193 transitions. [2024-06-21 21:04:01,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 556 transitions, 8909 flow [2024-06-21 21:04:05,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 556 transitions, 8306 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:05,787 INFO L231 Difference]: Finished difference. Result has 358 places, 520 transitions, 7608 flow [2024-06-21 21:04:05,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7608, PETRI_PLACES=358, PETRI_TRANSITIONS=520} [2024-06-21 21:04:05,787 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-21 21:04:05,787 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 520 transitions, 7608 flow [2024-06-21 21:04:05,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:05,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:05,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:05,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:04:05,788 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:05,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash 527205956, now seen corresponding path program 19 times [2024-06-21 21:04:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:05,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915992186] [2024-06-21 21:04:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:05,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:07,104 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 21:04:07,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:07,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915992186] [2024-06-21 21:04:07,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915992186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:07,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:07,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:04:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479345946] [2024-06-21 21:04:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:04:07,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:04:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:04:07,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:04:07,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 520 transitions, 7608 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:07,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:07,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:04:07,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:09,669 INFO L124 PetriNetUnfolderBase]: 5244/8200 cut-off events. [2024-06-21 21:04:09,669 INFO L125 PetriNetUnfolderBase]: For 2563580/2563601 co-relation queries the response was YES. [2024-06-21 21:04:09,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98946 conditions, 8200 events. 5244/8200 cut-off events. For 2563580/2563601 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 48735 event pairs, 903 based on Foata normal form. 8/8168 useless extension candidates. Maximal degree in co-relation 98772. Up to 6363 conditions per place. [2024-06-21 21:04:09,791 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 291 selfloop transitions, 242 changer transitions 0/558 dead transitions. [2024-06-21 21:04:09,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 558 transitions, 8956 flow [2024-06-21 21:04:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 21:04:09,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-21 21:04:09,792 INFO L175 Difference]: Start difference. First operand has 358 places, 520 transitions, 7608 flow. Second operand 10 states and 194 transitions. [2024-06-21 21:04:09,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 558 transitions, 8956 flow [2024-06-21 21:04:14,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 558 transitions, 8332 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:14,430 INFO L231 Difference]: Finished difference. Result has 360 places, 522 transitions, 7637 flow [2024-06-21 21:04:14,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6984, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7637, PETRI_PLACES=360, PETRI_TRANSITIONS=522} [2024-06-21 21:04:14,431 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-21 21:04:14,431 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 522 transitions, 7637 flow [2024-06-21 21:04:14,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:14,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:14,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:04:14,431 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:14,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash 527090636, now seen corresponding path program 20 times [2024-06-21 21:04:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110037524] [2024-06-21 21:04:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:15,777 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 21:04:15,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:15,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110037524] [2024-06-21 21:04:15,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110037524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:15,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:15,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:04:15,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120578970] [2024-06-21 21:04:15,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:15,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:04:15,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:15,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:04:15,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:04:15,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:04:15,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 522 transitions, 7637 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:15,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:15,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:04:15,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:18,132 INFO L124 PetriNetUnfolderBase]: 5228/8175 cut-off events. [2024-06-21 21:04:18,132 INFO L125 PetriNetUnfolderBase]: For 2575802/2575828 co-relation queries the response was YES. [2024-06-21 21:04:18,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98231 conditions, 8175 events. 5228/8175 cut-off events. For 2575802/2575828 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 48539 event pairs, 946 based on Foata normal form. 8/8136 useless extension candidates. Maximal degree in co-relation 98056. Up to 6349 conditions per place. [2024-06-21 21:04:18,260 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 311 selfloop transitions, 226 changer transitions 0/562 dead transitions. [2024-06-21 21:04:18,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 562 transitions, 9059 flow [2024-06-21 21:04:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:04:18,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-21 21:04:18,261 INFO L175 Difference]: Start difference. First operand has 360 places, 522 transitions, 7637 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:04:18,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 562 transitions, 9059 flow [2024-06-21 21:04:23,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 562 transitions, 8424 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:23,219 INFO L231 Difference]: Finished difference. Result has 363 places, 527 transitions, 7741 flow [2024-06-21 21:04:23,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7741, PETRI_PLACES=363, PETRI_TRANSITIONS=527} [2024-06-21 21:04:23,219 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-21 21:04:23,219 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 527 transitions, 7741 flow [2024-06-21 21:04:23,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:23,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:23,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:23,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:04:23,220 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:23,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2109182600, now seen corresponding path program 4 times [2024-06-21 21:04:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:23,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699688991] [2024-06-21 21:04:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:23,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:24,016 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 21:04:24,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:24,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699688991] [2024-06-21 21:04:24,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699688991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:24,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:24,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:24,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560776196] [2024-06-21 21:04:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:24,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:24,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:24,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:04:24,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 527 transitions, 7741 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:24,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:24,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:04:24,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:26,600 INFO L124 PetriNetUnfolderBase]: 5548/8480 cut-off events. [2024-06-21 21:04:26,600 INFO L125 PetriNetUnfolderBase]: For 2611769/2611790 co-relation queries the response was YES. [2024-06-21 21:04:26,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99390 conditions, 8480 events. 5548/8480 cut-off events. For 2611769/2611790 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 48702 event pairs, 1116 based on Foata normal form. 6/8404 useless extension candidates. Maximal degree in co-relation 99213. Up to 7971 conditions per place. [2024-06-21 21:04:26,728 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 430 selfloop transitions, 81 changer transitions 0/549 dead transitions. [2024-06-21 21:04:26,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 549 transitions, 9381 flow [2024-06-21 21:04:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:04:26,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 21:04:26,729 INFO L175 Difference]: Start difference. First operand has 363 places, 527 transitions, 7741 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:04:26,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 549 transitions, 9381 flow [2024-06-21 21:04:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 549 transitions, 8805 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:30,751 INFO L231 Difference]: Finished difference. Result has 365 places, 533 transitions, 7435 flow [2024-06-21 21:04:30,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7165, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7435, PETRI_PLACES=365, PETRI_TRANSITIONS=533} [2024-06-21 21:04:30,751 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-21 21:04:30,751 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 533 transitions, 7435 flow [2024-06-21 21:04:30,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:30,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:30,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:30,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:04:30,752 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:30,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 922260433, now seen corresponding path program 2 times [2024-06-21 21:04:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465730416] [2024-06-21 21:04:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:31,566 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 21:04:31,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465730416] [2024-06-21 21:04:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465730416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:31,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:31,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:31,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039607132] [2024-06-21 21:04:31,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:31,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:31,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:04:31,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 533 transitions, 7435 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:31,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:31,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:04:31,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:34,010 INFO L124 PetriNetUnfolderBase]: 5551/8483 cut-off events. [2024-06-21 21:04:34,011 INFO L125 PetriNetUnfolderBase]: For 2627910/2627937 co-relation queries the response was YES. [2024-06-21 21:04:34,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98214 conditions, 8483 events. 5551/8483 cut-off events. For 2627910/2627937 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 48719 event pairs, 1140 based on Foata normal form. 9/8422 useless extension candidates. Maximal degree in co-relation 98036. Up to 8143 conditions per place. [2024-06-21 21:04:34,143 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 467 selfloop transitions, 42 changer transitions 0/547 dead transitions. [2024-06-21 21:04:34,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 547 transitions, 8775 flow [2024-06-21 21:04:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:04:34,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:04:34,144 INFO L175 Difference]: Start difference. First operand has 365 places, 533 transitions, 7435 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:04:34,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 547 transitions, 8775 flow [2024-06-21 21:04:38,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 547 transitions, 8528 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:38,359 INFO L231 Difference]: Finished difference. Result has 368 places, 536 transitions, 7334 flow [2024-06-21 21:04:38,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7188, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7334, PETRI_PLACES=368, PETRI_TRANSITIONS=536} [2024-06-21 21:04:38,360 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-21 21:04:38,360 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 536 transitions, 7334 flow [2024-06-21 21:04:38,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:38,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:38,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:38,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:04:38,360 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:38,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1678841177, now seen corresponding path program 3 times [2024-06-21 21:04:38,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:38,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387966037] [2024-06-21 21:04:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:38,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:39,156 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 21:04:39,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:39,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387966037] [2024-06-21 21:04:39,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387966037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:39,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:39,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382115339] [2024-06-21 21:04:39,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:39,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:39,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:39,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:04:39,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 536 transitions, 7334 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:39,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:39,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:04:39,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:41,599 INFO L124 PetriNetUnfolderBase]: 5556/8490 cut-off events. [2024-06-21 21:04:41,599 INFO L125 PetriNetUnfolderBase]: For 2666658/2666685 co-relation queries the response was YES. [2024-06-21 21:04:41,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98408 conditions, 8490 events. 5556/8490 cut-off events. For 2666658/2666685 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 48822 event pairs, 1140 based on Foata normal form. 9/8429 useless extension candidates. Maximal degree in co-relation 98229. Up to 8149 conditions per place. [2024-06-21 21:04:41,744 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 466 selfloop transitions, 46 changer transitions 0/550 dead transitions. [2024-06-21 21:04:41,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 550 transitions, 8688 flow [2024-06-21 21:04:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:04:41,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2024-06-21 21:04:41,745 INFO L175 Difference]: Start difference. First operand has 368 places, 536 transitions, 7334 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:04:41,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 550 transitions, 8688 flow [2024-06-21 21:04:45,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 550 transitions, 8552 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:45,639 INFO L231 Difference]: Finished difference. Result has 371 places, 539 transitions, 7358 flow [2024-06-21 21:04:45,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7358, PETRI_PLACES=371, PETRI_TRANSITIONS=539} [2024-06-21 21:04:45,640 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-21 21:04:45,640 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 539 transitions, 7358 flow [2024-06-21 21:04:45,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:45,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:45,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:45,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:04:45,641 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:45,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2109169580, now seen corresponding path program 5 times [2024-06-21 21:04:45,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:45,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627463725] [2024-06-21 21:04:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:46,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:46,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627463725] [2024-06-21 21:04:46,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627463725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:46,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:46,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:46,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648926986] [2024-06-21 21:04:46,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:46,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:46,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:46,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:46,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:04:46,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 539 transitions, 7358 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:46,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:46,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:04:46,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:48,937 INFO L124 PetriNetUnfolderBase]: 5552/8486 cut-off events. [2024-06-21 21:04:48,937 INFO L125 PetriNetUnfolderBase]: For 2700236/2700257 co-relation queries the response was YES. [2024-06-21 21:04:49,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98455 conditions, 8486 events. 5552/8486 cut-off events. For 2700236/2700257 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 48738 event pairs, 1111 based on Foata normal form. 6/8410 useless extension candidates. Maximal degree in co-relation 98275. Up to 7980 conditions per place. [2024-06-21 21:04:49,062 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 433 selfloop transitions, 82 changer transitions 0/553 dead transitions. [2024-06-21 21:04:49,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 553 transitions, 8670 flow [2024-06-21 21:04:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:04:49,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778409090909091 [2024-06-21 21:04:49,063 INFO L175 Difference]: Start difference. First operand has 371 places, 539 transitions, 7358 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:04:49,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 553 transitions, 8670 flow [2024-06-21 21:04:53,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 553 transitions, 8520 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:53,531 INFO L231 Difference]: Finished difference. Result has 374 places, 539 transitions, 7378 flow [2024-06-21 21:04:53,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7378, PETRI_PLACES=374, PETRI_TRANSITIONS=539} [2024-06-21 21:04:53,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-21 21:04:53,532 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 539 transitions, 7378 flow [2024-06-21 21:04:53,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:53,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:53,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:53,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:04:53,532 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:53,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:53,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1678840712, now seen corresponding path program 6 times [2024-06-21 21:04:53,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:53,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777834480] [2024-06-21 21:04:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:53,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:54,335 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 21:04:54,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:54,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777834480] [2024-06-21 21:04:54,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777834480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:54,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:54,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:54,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621370425] [2024-06-21 21:04:54,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:54,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:54,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:04:54,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 539 transitions, 7378 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:54,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:54,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:04:54,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:56,875 INFO L124 PetriNetUnfolderBase]: 5546/8478 cut-off events. [2024-06-21 21:04:56,875 INFO L125 PetriNetUnfolderBase]: For 2727193/2727214 co-relation queries the response was YES. [2024-06-21 21:04:56,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98564 conditions, 8478 events. 5546/8478 cut-off events. For 2727193/2727214 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 48669 event pairs, 1108 based on Foata normal form. 6/8402 useless extension candidates. Maximal degree in co-relation 98383. Up to 7975 conditions per place. [2024-06-21 21:04:57,020 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 430 selfloop transitions, 84 changer transitions 0/552 dead transitions. [2024-06-21 21:04:57,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 552 transitions, 8446 flow [2024-06-21 21:04:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:04:57,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-21 21:04:57,021 INFO L175 Difference]: Start difference. First operand has 374 places, 539 transitions, 7378 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:04:57,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 552 transitions, 8446 flow [2024-06-21 21:05:01,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 552 transitions, 8176 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 21:05:01,711 INFO L231 Difference]: Finished difference. Result has 374 places, 539 transitions, 7282 flow [2024-06-21 21:05:01,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7108, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7282, PETRI_PLACES=374, PETRI_TRANSITIONS=539} [2024-06-21 21:05:01,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-21 21:05:01,711 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 539 transitions, 7282 flow [2024-06-21 21:05:01,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:01,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:01,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:01,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:05:01,711 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:01,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1678856057, now seen corresponding path program 4 times [2024-06-21 21:05:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:01,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808483488] [2024-06-21 21:05:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:02,531 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 21:05:02,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:02,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808483488] [2024-06-21 21:05:02,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808483488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:02,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:02,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949335025] [2024-06-21 21:05:02,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:02,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:02,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:02,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:05:02,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 539 transitions, 7282 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:02,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:02,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:05:02,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:04,983 INFO L124 PetriNetUnfolderBase]: 5541/8470 cut-off events. [2024-06-21 21:05:04,983 INFO L125 PetriNetUnfolderBase]: For 2748516/2748543 co-relation queries the response was YES. [2024-06-21 21:05:05,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98223 conditions, 8470 events. 5541/8470 cut-off events. For 2748516/2748543 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 48661 event pairs, 1138 based on Foata normal form. 9/8409 useless extension candidates. Maximal degree in co-relation 98042. Up to 8130 conditions per place. [2024-06-21 21:05:05,111 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 463 selfloop transitions, 48 changer transitions 0/549 dead transitions. [2024-06-21 21:05:05,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 549 transitions, 8332 flow [2024-06-21 21:05:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:05:05,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35511363636363635 [2024-06-21 21:05:05,112 INFO L175 Difference]: Start difference. First operand has 374 places, 539 transitions, 7282 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:05:05,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 549 transitions, 8332 flow [2024-06-21 21:05:10,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 549 transitions, 8114 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:05:10,420 INFO L231 Difference]: Finished difference. Result has 374 places, 539 transitions, 7166 flow [2024-06-21 21:05:10,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7064, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7166, PETRI_PLACES=374, PETRI_TRANSITIONS=539} [2024-06-21 21:05:10,420 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-21 21:05:10,421 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 539 transitions, 7166 flow [2024-06-21 21:05:10,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:10,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:10,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:05:10,421 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:10,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:10,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1123844847, now seen corresponding path program 1 times [2024-06-21 21:05:10,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:10,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871875236] [2024-06-21 21:05:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:10,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:11,372 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 21:05:11,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:11,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871875236] [2024-06-21 21:05:11,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871875236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:11,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:11,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:05:11,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163297462] [2024-06-21 21:05:11,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:11,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:05:11,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:05:11,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:05:11,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:05:11,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 539 transitions, 7166 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:11,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:11,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:05:11,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:13,536 INFO L124 PetriNetUnfolderBase]: 5456/8428 cut-off events. [2024-06-21 21:05:13,537 INFO L125 PetriNetUnfolderBase]: For 2439577/2439577 co-relation queries the response was YES. [2024-06-21 21:05:13,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92309 conditions, 8428 events. 5456/8428 cut-off events. For 2439577/2439577 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 49171 event pairs, 1122 based on Foata normal form. 1/8415 useless extension candidates. Maximal degree in co-relation 92127. Up to 8074 conditions per place. [2024-06-21 21:05:13,660 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 506 selfloop transitions, 36 changer transitions 0/565 dead transitions. [2024-06-21 21:05:13,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 565 transitions, 8666 flow [2024-06-21 21:05:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:05:13,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-21 21:05:13,661 INFO L175 Difference]: Start difference. First operand has 374 places, 539 transitions, 7166 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:05:13,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 565 transitions, 8666 flow [2024-06-21 21:05:17,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 565 transitions, 8576 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:05:17,447 INFO L231 Difference]: Finished difference. Result has 376 places, 545 transitions, 7264 flow [2024-06-21 21:05:17,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7264, PETRI_PLACES=376, PETRI_TRANSITIONS=545} [2024-06-21 21:05:17,448 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-21 21:05:17,448 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 545 transitions, 7264 flow [2024-06-21 21:05:17,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:17,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:17,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:17,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:05:17,448 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:17,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1123694900, now seen corresponding path program 1 times [2024-06-21 21:05:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:17,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130997109] [2024-06-21 21:05:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:17,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:18,375 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 21:05:18,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:18,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130997109] [2024-06-21 21:05:18,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130997109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:18,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:18,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:18,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786859183] [2024-06-21 21:05:18,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:18,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:18,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:18,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-21 21:05:18,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 545 transitions, 7264 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:18,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:18,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-21 21:05:18,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:20,636 INFO L124 PetriNetUnfolderBase]: 5616/8590 cut-off events. [2024-06-21 21:05:20,636 INFO L125 PetriNetUnfolderBase]: For 2478546/2478546 co-relation queries the response was YES. [2024-06-21 21:05:20,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94286 conditions, 8590 events. 5616/8590 cut-off events. For 2478546/2478546 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 49317 event pairs, 1165 based on Foata normal form. 1/8577 useless extension candidates. Maximal degree in co-relation 94103. Up to 8390 conditions per place. [2024-06-21 21:05:20,762 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 518 selfloop transitions, 41 changer transitions 0/568 dead transitions. [2024-06-21 21:05:20,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 568 transitions, 8816 flow [2024-06-21 21:05:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:05:20,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-21 21:05:20,763 INFO L175 Difference]: Start difference. First operand has 376 places, 545 transitions, 7264 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:05:20,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 568 transitions, 8816 flow [2024-06-21 21:05:25,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 568 transitions, 8713 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:25,218 INFO L231 Difference]: Finished difference. Result has 380 places, 551 transitions, 7387 flow [2024-06-21 21:05:25,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7161, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7387, PETRI_PLACES=380, PETRI_TRANSITIONS=551} [2024-06-21 21:05:25,219 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-21 21:05:25,219 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 551 transitions, 7387 flow [2024-06-21 21:05:25,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:25,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:25,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:25,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:05:25,219 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:25,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:25,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1362212071, now seen corresponding path program 2 times [2024-06-21 21:05:25,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:25,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757114724] [2024-06-21 21:05:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:25,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:26,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:26,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757114724] [2024-06-21 21:05:26,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757114724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:26,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:26,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:05:26,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435063547] [2024-06-21 21:05:26,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:26,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:05:26,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:05:26,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:05:26,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:05:26,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 551 transitions, 7387 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:26,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:26,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:05:26,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:28,415 INFO L124 PetriNetUnfolderBase]: 5478/8454 cut-off events. [2024-06-21 21:05:28,415 INFO L125 PetriNetUnfolderBase]: For 2519534/2519534 co-relation queries the response was YES. [2024-06-21 21:05:28,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94081 conditions, 8454 events. 5478/8454 cut-off events. For 2519534/2519534 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 49235 event pairs, 1121 based on Foata normal form. 1/8441 useless extension candidates. Maximal degree in co-relation 93896. Up to 8097 conditions per place. [2024-06-21 21:05:28,543 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 509 selfloop transitions, 37 changer transitions 0/571 dead transitions. [2024-06-21 21:05:28,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 571 transitions, 8817 flow [2024-06-21 21:05:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:05:28,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 21:05:28,544 INFO L175 Difference]: Start difference. First operand has 380 places, 551 transitions, 7387 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:05:28,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 571 transitions, 8817 flow [2024-06-21 21:05:32,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 571 transitions, 8710 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:32,416 INFO L231 Difference]: Finished difference. Result has 384 places, 554 transitions, 7394 flow [2024-06-21 21:05:32,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7280, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7394, PETRI_PLACES=384, PETRI_TRANSITIONS=554} [2024-06-21 21:05:32,416 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 339 predicate places. [2024-06-21 21:05:32,416 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 554 transitions, 7394 flow [2024-06-21 21:05:32,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:32,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:32,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:32,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:05:32,416 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:32,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:32,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1356647881, now seen corresponding path program 3 times [2024-06-21 21:05:32,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:32,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026788757] [2024-06-21 21:05:32,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:32,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat