./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix028_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:00:33,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:00:33,875 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:00:33,878 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:00:33,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:00:33,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:00:33,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:00:33,934 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:00:33,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:00:33,934 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:00:33,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:00:33,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:00:33,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:00:33,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:00:33,936 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:00:33,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:00:33,937 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:00:33,937 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:00:33,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:00:33,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:00:33,937 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:00:33,938 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:00:33,938 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:00:33,938 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:00:33,938 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:00:33,939 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:00:33,939 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:00:33,939 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:00:33,939 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:00:33,939 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:00:33,940 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:00:33,940 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:00:33,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:00:33,940 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:00:33,940 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:00:33,941 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:00:33,941 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:00:33,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:00:33,941 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:00:33,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:00:33,941 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:00:33,942 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:00:33,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:00:33,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:00:34,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:00:34,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:00:34,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:00:34,189 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:00:34,189 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:00:34,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-04 15:00:34,367 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:00:34,367 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:00:34,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:00:35,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:00:35,593 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:00:35,595 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:00:35,609 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d65d46d/953de736910942728f9604f652c3b307/FLAG0ffa3fa71 [2024-06-04 15:00:35,623 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d65d46d/953de736910942728f9604f652c3b307 [2024-06-04 15:00:35,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:00:35,626 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:00:35,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:00:35,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:00:35,631 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:00:35,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:00:34" (1/2) ... [2024-06-04 15:00:35,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee8b844 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:00:35, skipping insertion in model container [2024-06-04 15:00:35,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:00:34" (1/2) ... [2024-06-04 15:00:35,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@401d9afb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:00:35, skipping insertion in model container [2024-06-04 15:00:35,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:00:35" (2/2) ... [2024-06-04 15:00:35,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee8b844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:35, skipping insertion in model container [2024-06-04 15:00:35,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:00:35" (2/2) ... [2024-06-04 15:00:35,636 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:00:35,727 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:00:35,728 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-04 15:00:35,728 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-04 15:00:35,728 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-04 15:00:35,729 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:00:35,729 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-04 15:00:35,765 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:00:36,067 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:00:36,078 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:00:36,216 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:00:36,253 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:00:36,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36 WrapperNode [2024-06-04 15:00:36,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:00:36,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:00:36,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:00:36,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:00:36,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,331 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-04 15:00:36,332 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:00:36,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:00:36,333 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:00:36,333 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:00:36,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,377 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]. [2024-06-04 15:00:36,384 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,391 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,397 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,409 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,411 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:00:36,414 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:00:36,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:00:36,414 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:00:36,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (1/1) ... [2024-06-04 15:00:36,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:00:36,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:00:36,469 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) [2024-06-04 15:00:36,474 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 [2024-06-04 15:00:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:00:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:00:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:00:36,502 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:00:36,502 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:00:36,502 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:00:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:00:36,503 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:00:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:00:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:00:36,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:00:36,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:00:36,504 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:00:36,643 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:00:36,645 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:00:37,020 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:00:37,020 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:00:37,179 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:00:37,179 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:00:37,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:00:37 BoogieIcfgContainer [2024-06-04 15:00:37,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:00:37,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:00:37,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:00:37,184 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:00:37,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:00:34" (1/4) ... [2024-06-04 15:00:37,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a220521 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:00:37, skipping insertion in model container [2024-06-04 15:00:37,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:00:35" (2/4) ... [2024-06-04 15:00:37,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a220521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:00:37, skipping insertion in model container [2024-06-04 15:00:37,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:00:36" (3/4) ... [2024-06-04 15:00:37,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a220521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:00:37, skipping insertion in model container [2024-06-04 15:00:37,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:00:37" (4/4) ... [2024-06-04 15:00:37,187 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.opt_pso.opt_rmo.opt.i [2024-06-04 15:00:37,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:00:37,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:00:37,200 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:00:37,240 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:00:37,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 15:00:37,289 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 15:00:37,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:00:37,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:00:37,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 15:00:37,294 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 15:00:37,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:00:37,304 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;@373323d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:00:37,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:00:37,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:00:37,307 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:00:37,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:00:37,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:37,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:00:37,308 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)] === [2024-06-04 15:00:37,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:37,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1346525187, now seen corresponding path program 1 times [2024-06-04 15:00:37,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:37,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225739394] [2024-06-04 15:00:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:37,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:38,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225739394] [2024-06-04 15:00:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225739394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:38,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:38,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:00:38,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304227320] [2024-06-04 15:00:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:38,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:00:38,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:38,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:00:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:00:38,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 15:00:38,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:38,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:38,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 15:00:38,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:38,676 INFO L124 PetriNetUnfolderBase]: 1407/2238 cut-off events. [2024-06-04 15:00:38,677 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-04 15:00:38,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 2238 events. 1407/2238 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11012 event pairs, 989 based on Foata normal form. 1/2150 useless extension candidates. Maximal degree in co-relation 4429. Up to 2105 conditions per place. [2024-06-04 15:00:38,692 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 15:00:38,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-04 15:00:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:00:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:00:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-04 15:00:38,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 15:00:38,703 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-04 15:00:38,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-04 15:00:38,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:00:38,709 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 15:00:38,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-04 15:00:38,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 15:00:38,717 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 15:00:38,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:38,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:38,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:38,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:00:38,719 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)] === [2024-06-04 15:00:38,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1225515812, now seen corresponding path program 1 times [2024-06-04 15:00:38,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:38,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540687205] [2024-06-04 15:00:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:39,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:39,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540687205] [2024-06-04 15:00:39,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540687205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:39,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:39,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:00:39,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612020354] [2024-06-04 15:00:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:39,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:00:39,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:00:39,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:00:39,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:00:39,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) [2024-06-04 15:00:39,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:39,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:00:39,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:39,752 INFO L124 PetriNetUnfolderBase]: 1653/2529 cut-off events. [2024-06-04 15:00:39,752 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-04 15:00:39,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5720 conditions, 2529 events. 1653/2529 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12025 event pairs, 1038 based on Foata normal form. 3/2519 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-04 15:00:39,762 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-04 15:00:39,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2024-06-04 15:00:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:00:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:00:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-04 15:00:39,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 15:00:39,763 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 88 transitions. [2024-06-04 15:00:39,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2024-06-04 15:00:39,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:00:39,765 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-04 15:00:39,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-04 15:00:39,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-04 15:00:39,766 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-04 15:00:39,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) [2024-06-04 15:00:39,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:39,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:39,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:00:39,767 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)] === [2024-06-04 15:00:39,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash 663716578, now seen corresponding path program 1 times [2024-06-04 15:00:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:39,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73178635] [2024-06-04 15:00:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:40,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:40,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73178635] [2024-06-04 15:00:40,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73178635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:40,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:40,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:00:40,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499553432] [2024-06-04 15:00:40,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:40,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:00:40,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:40,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:00:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:00:40,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:00:40,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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) [2024-06-04 15:00:40,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:40,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:00:40,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:40,747 INFO L124 PetriNetUnfolderBase]: 1641/2511 cut-off events. [2024-06-04 15:00:40,747 INFO L125 PetriNetUnfolderBase]: For 1294/1294 co-relation queries the response was YES. [2024-06-04 15:00:40,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 2511 events. 1641/2511 cut-off events. For 1294/1294 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11916 event pairs, 746 based on Foata normal form. 6/2504 useless extension candidates. Maximal degree in co-relation 6272. Up to 2393 conditions per place. [2024-06-04 15:00:40,759 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-04 15:00:40,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 328 flow [2024-06-04 15:00:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:00:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:00:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-04 15:00:40,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-04 15:00:40,760 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 108 transitions. [2024-06-04 15:00:40,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 328 flow [2024-06-04 15:00:40,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 15:00:40,763 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-06-04 15:00:40,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-04 15:00:40,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-04 15:00:40,764 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-06-04 15:00:40,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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) [2024-06-04 15:00:40,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:40,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:40,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:00:40,764 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)] === [2024-06-04 15:00:40,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2118459871, now seen corresponding path program 1 times [2024-06-04 15:00:40,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:40,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020527880] [2024-06-04 15:00:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:40,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:41,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:41,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020527880] [2024-06-04 15:00:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020527880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:00:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521592542] [2024-06-04 15:00:41,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:00:41,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:41,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:00:41,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:00:41,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:00:41,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:41,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:41,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:00:41,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:42,112 INFO L124 PetriNetUnfolderBase]: 1632/2496 cut-off events. [2024-06-04 15:00:42,112 INFO L125 PetriNetUnfolderBase]: For 2395/2395 co-relation queries the response was YES. [2024-06-04 15:00:42,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6840 conditions, 2496 events. 1632/2496 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11830 event pairs, 582 based on Foata normal form. 6/2489 useless extension candidates. Maximal degree in co-relation 6822. Up to 2348 conditions per place. [2024-06-04 15:00:42,126 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-04 15:00:42,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 382 flow [2024-06-04 15:00:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:00:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:00:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-04 15:00:42,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-04 15:00:42,128 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 123 transitions. [2024-06-04 15:00:42,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 382 flow [2024-06-04 15:00:42,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:00:42,131 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-04 15:00:42,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-04 15:00:42,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-04 15:00:42,132 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-04 15:00:42,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:42,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:42,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:42,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:00:42,133 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)] === [2024-06-04 15:00:42,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1592947963, now seen corresponding path program 1 times [2024-06-04 15:00:42,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:42,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486614964] [2024-06-04 15:00:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:42,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:42,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486614964] [2024-06-04 15:00:42,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486614964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:42,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:42,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:00:42,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695701940] [2024-06-04 15:00:42,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:42,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:00:42,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:42,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:00:42,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:00:42,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:00:42,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:42,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:42,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:00:42,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:43,101 INFO L124 PetriNetUnfolderBase]: 1375/2213 cut-off events. [2024-06-04 15:00:43,101 INFO L125 PetriNetUnfolderBase]: For 3103/3103 co-relation queries the response was YES. [2024-06-04 15:00:43,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6335 conditions, 2213 events. 1375/2213 cut-off events. For 3103/3103 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10971 event pairs, 673 based on Foata normal form. 2/2178 useless extension candidates. Maximal degree in co-relation 6316. Up to 2047 conditions per place. [2024-06-04 15:00:43,114 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-04 15:00:43,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 341 flow [2024-06-04 15:00:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:00:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:00:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-04 15:00:43,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-04 15:00:43,116 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 5 states and 91 transitions. [2024-06-04 15:00:43,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 341 flow [2024-06-04 15:00:43,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 308 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:43,119 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 206 flow [2024-06-04 15:00:43,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-04 15:00:43,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-04 15:00:43,120 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 206 flow [2024-06-04 15:00:43,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:43,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:43,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:43,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:00:43,121 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)] === [2024-06-04 15:00:43,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2136747659, now seen corresponding path program 1 times [2024-06-04 15:00:43,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:43,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966668420] [2024-06-04 15:00:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:43,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966668420] [2024-06-04 15:00:43,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966668420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:43,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:43,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:00:43,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268867353] [2024-06-04 15:00:43,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:43,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:00:43,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:43,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:00:43,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:00:43,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:43,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:43,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:43,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:43,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:44,281 INFO L124 PetriNetUnfolderBase]: 1629/2505 cut-off events. [2024-06-04 15:00:44,281 INFO L125 PetriNetUnfolderBase]: For 5036/5036 co-relation queries the response was YES. [2024-06-04 15:00:44,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7756 conditions, 2505 events. 1629/2505 cut-off events. For 5036/5036 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11838 event pairs, 791 based on Foata normal form. 3/2507 useless extension candidates. Maximal degree in co-relation 7735. Up to 2382 conditions per place. [2024-06-04 15:00:44,292 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-04 15:00:44,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 462 flow [2024-06-04 15:00:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:00:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:00:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 15:00:44,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:00:44,293 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 206 flow. Second operand 6 states and 108 transitions. [2024-06-04 15:00:44,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 462 flow [2024-06-04 15:00:44,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 440 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 15:00:44,297 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 309 flow [2024-06-04 15:00:44,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-04 15:00:44,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-04 15:00:44,297 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 309 flow [2024-06-04 15:00:44,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:44,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:44,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:44,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:00:44,298 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)] === [2024-06-04 15:00:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:44,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1824284786, now seen corresponding path program 1 times [2024-06-04 15:00:44,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:44,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042545250] [2024-06-04 15:00:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:44,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:44,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:44,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042545250] [2024-06-04 15:00:44,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042545250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:44,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:44,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:00:44,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061105895] [2024-06-04 15:00:44,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:44,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:00:44,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:00:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:00:45,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:45,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 309 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:45,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:45,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:45,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:45,468 INFO L124 PetriNetUnfolderBase]: 1697/2612 cut-off events. [2024-06-04 15:00:45,468 INFO L125 PetriNetUnfolderBase]: For 7867/7877 co-relation queries the response was YES. [2024-06-04 15:00:45,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9052 conditions, 2612 events. 1697/2612 cut-off events. For 7867/7877 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12379 event pairs, 793 based on Foata normal form. 2/2601 useless extension candidates. Maximal degree in co-relation 9028. Up to 2473 conditions per place. [2024-06-04 15:00:45,486 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-04 15:00:45,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 521 flow [2024-06-04 15:00:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:00:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:00:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:00:45,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:00:45,488 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 309 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:00:45,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 521 flow [2024-06-04 15:00:45,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 505 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-04 15:00:45,493 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 353 flow [2024-06-04 15:00:45,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-04 15:00:45,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-04 15:00:45,495 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 353 flow [2024-06-04 15:00:45,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:45,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:45,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:45,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:00:45,496 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)] === [2024-06-04 15:00:45,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1343665436, now seen corresponding path program 2 times [2024-06-04 15:00:45,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:45,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396989411] [2024-06-04 15:00:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:45,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:46,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:46,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396989411] [2024-06-04 15:00:46,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396989411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:46,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:00:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274100711] [2024-06-04 15:00:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:00:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:00:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:00:46,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:46,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:46,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:46,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:46,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:46,597 INFO L124 PetriNetUnfolderBase]: 1692/2607 cut-off events. [2024-06-04 15:00:46,597 INFO L125 PetriNetUnfolderBase]: For 10116/10136 co-relation queries the response was YES. [2024-06-04 15:00:46,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 2607 events. 1692/2607 cut-off events. For 10116/10136 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12372 event pairs, 800 based on Foata normal form. 10/2604 useless extension candidates. Maximal degree in co-relation 9587. Up to 2448 conditions per place. [2024-06-04 15:00:46,611 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-04 15:00:46,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 563 flow [2024-06-04 15:00:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:00:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:00:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-04 15:00:46,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-04 15:00:46,612 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 353 flow. Second operand 6 states and 104 transitions. [2024-06-04 15:00:46,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 563 flow [2024-06-04 15:00:46,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 527 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:46,617 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 393 flow [2024-06-04 15:00:46,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-04 15:00:46,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-04 15:00:46,618 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 393 flow [2024-06-04 15:00:46,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:46,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:46,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:46,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:00:46,619 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)] === [2024-06-04 15:00:46,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:46,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1343673372, now seen corresponding path program 1 times [2024-06-04 15:00:46,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:46,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841914584] [2024-06-04 15:00:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:47,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:47,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841914584] [2024-06-04 15:00:47,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841914584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:47,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:47,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882360368] [2024-06-04 15:00:47,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:47,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:47,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:47,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:47,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:00:47,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:47,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:47,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:48,062 INFO L124 PetriNetUnfolderBase]: 1637/2543 cut-off events. [2024-06-04 15:00:48,062 INFO L125 PetriNetUnfolderBase]: For 12161/12161 co-relation queries the response was YES. [2024-06-04 15:00:48,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9901 conditions, 2543 events. 1637/2543 cut-off events. For 12161/12161 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12146 event pairs, 755 based on Foata normal form. 3/2545 useless extension candidates. Maximal degree in co-relation 9873. Up to 2381 conditions per place. [2024-06-04 15:00:48,080 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 63 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-04 15:00:48,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 677 flow [2024-06-04 15:00:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 15:00:48,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-04 15:00:48,084 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 393 flow. Second operand 7 states and 124 transitions. [2024-06-04 15:00:48,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 677 flow [2024-06-04 15:00:48,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 625 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:48,093 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 432 flow [2024-06-04 15:00:48,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-04 15:00:48,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-04 15:00:48,094 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 432 flow [2024-06-04 15:00:48,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:00:48,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:48,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:48,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:00:48,095 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)] === [2024-06-04 15:00:48,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash 413487814, now seen corresponding path program 1 times [2024-06-04 15:00:48,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:48,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486334860] [2024-06-04 15:00:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:48,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:48,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:48,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486334860] [2024-06-04 15:00:48,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486334860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:48,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:48,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:48,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91370909] [2024-06-04 15:00:48,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:48,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:48,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:48,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:48,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:48,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:48,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:00:48,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:48,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:48,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:49,363 INFO L124 PetriNetUnfolderBase]: 1756/2680 cut-off events. [2024-06-04 15:00:49,364 INFO L125 PetriNetUnfolderBase]: For 16886/16905 co-relation queries the response was YES. [2024-06-04 15:00:49,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11335 conditions, 2680 events. 1756/2680 cut-off events. For 16886/16905 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12542 event pairs, 680 based on Foata normal form. 5/2678 useless extension candidates. Maximal degree in co-relation 11306. Up to 2493 conditions per place. [2024-06-04 15:00:49,376 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-04 15:00:49,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 724 flow [2024-06-04 15:00:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 15:00:49,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-04 15:00:49,378 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 432 flow. Second operand 7 states and 125 transitions. [2024-06-04 15:00:49,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 724 flow [2024-06-04 15:00:49,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 663 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:00:49,384 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 469 flow [2024-06-04 15:00:49,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-04 15:00:49,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-04 15:00:49,386 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 469 flow [2024-06-04 15:00:49,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:00:49,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:49,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:49,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:00:49,387 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)] === [2024-06-04 15:00:49,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1473174902, now seen corresponding path program 1 times [2024-06-04 15:00:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:49,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749764019] [2024-06-04 15:00:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:49,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:50,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749764019] [2024-06-04 15:00:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749764019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:50,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:50,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:50,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126539203] [2024-06-04 15:00:50,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:50,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:50,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:50,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:00:50,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 469 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:50,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:50,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:00:50,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:50,594 INFO L124 PetriNetUnfolderBase]: 1945/2884 cut-off events. [2024-06-04 15:00:50,594 INFO L125 PetriNetUnfolderBase]: For 20742/20742 co-relation queries the response was YES. [2024-06-04 15:00:50,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12970 conditions, 2884 events. 1945/2884 cut-off events. For 20742/20742 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13029 event pairs, 701 based on Foata normal form. 3/2886 useless extension candidates. Maximal degree in co-relation 12939. Up to 2812 conditions per place. [2024-06-04 15:00:50,608 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-04 15:00:50,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 899 flow [2024-06-04 15:00:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:50,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 15:00:50,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-04 15:00:50,609 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 469 flow. Second operand 7 states and 122 transitions. [2024-06-04 15:00:50,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 899 flow [2024-06-04 15:00:50,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 853 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 15:00:50,619 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 601 flow [2024-06-04 15:00:50,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=601, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-04 15:00:50,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-04 15:00:50,619 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 601 flow [2024-06-04 15:00:50,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:50,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:50,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:50,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:00:50,620 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)] === [2024-06-04 15:00:50,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:50,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1473175088, now seen corresponding path program 2 times [2024-06-04 15:00:50,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:50,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659177371] [2024-06-04 15:00:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:50,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:51,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:51,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659177371] [2024-06-04 15:00:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659177371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:51,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:51,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650130840] [2024-06-04 15:00:51,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:51,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:51,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:51,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:51,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 601 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:00:51,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:51,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:51,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:51,807 INFO L124 PetriNetUnfolderBase]: 1852/2803 cut-off events. [2024-06-04 15:00:51,807 INFO L125 PetriNetUnfolderBase]: For 26796/26827 co-relation queries the response was YES. [2024-06-04 15:00:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13682 conditions, 2803 events. 1852/2803 cut-off events. For 26796/26827 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13042 event pairs, 647 based on Foata normal form. 5/2795 useless extension candidates. Maximal degree in co-relation 13648. Up to 2573 conditions per place. [2024-06-04 15:00:51,820 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-04 15:00:51,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 1011 flow [2024-06-04 15:00:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:00:51,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-04 15:00:51,821 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 601 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:00:51,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 1011 flow [2024-06-04 15:00:51,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 116 transitions, 961 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-04 15:00:51,832 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 701 flow [2024-06-04 15:00:51,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=701, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-04 15:00:51,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-04 15:00:51,833 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 701 flow [2024-06-04 15:00:51,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:00:51,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:51,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:51,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:00:51,833 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)] === [2024-06-04 15:00:51,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1064125816, now seen corresponding path program 2 times [2024-06-04 15:00:51,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:51,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039366717] [2024-06-04 15:00:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:51,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:52,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039366717] [2024-06-04 15:00:52,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039366717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:52,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008754210] [2024-06-04 15:00:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:52,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:52,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:52,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:00:52,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 701 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:52,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:52,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:00:52,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:53,112 INFO L124 PetriNetUnfolderBase]: 2001/2967 cut-off events. [2024-06-04 15:00:53,113 INFO L125 PetriNetUnfolderBase]: For 32002/32014 co-relation queries the response was YES. [2024-06-04 15:00:53,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15123 conditions, 2967 events. 2001/2967 cut-off events. For 32002/32014 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13472 event pairs, 692 based on Foata normal form. 15/2981 useless extension candidates. Maximal degree in co-relation 15087. Up to 2807 conditions per place. [2024-06-04 15:00:53,132 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 34 changer transitions 0/122 dead transitions. [2024-06-04 15:00:53,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1207 flow [2024-06-04 15:00:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:00:53,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-04 15:00:53,133 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 701 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:00:53,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1207 flow [2024-06-04 15:00:53,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1153 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 15:00:53,151 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 835 flow [2024-06-04 15:00:53,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-04 15:00:53,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-04 15:00:53,152 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 835 flow [2024-06-04 15:00:53,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:53,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:53,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:53,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:00:53,153 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)] === [2024-06-04 15:00:53,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash 419921554, now seen corresponding path program 3 times [2024-06-04 15:00:53,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:53,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834336025] [2024-06-04 15:00:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:53,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:53,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:53,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834336025] [2024-06-04 15:00:53,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834336025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:53,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:53,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349330206] [2024-06-04 15:00:53,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:53,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:00:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:54,445 INFO L124 PetriNetUnfolderBase]: 1860/2823 cut-off events. [2024-06-04 15:00:54,446 INFO L125 PetriNetUnfolderBase]: For 37063/37096 co-relation queries the response was YES. [2024-06-04 15:00:54,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15253 conditions, 2823 events. 1860/2823 cut-off events. For 37063/37096 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13177 event pairs, 662 based on Foata normal form. 12/2828 useless extension candidates. Maximal degree in co-relation 15214. Up to 2546 conditions per place. [2024-06-04 15:00:54,481 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 80 selfloop transitions, 31 changer transitions 0/124 dead transitions. [2024-06-04 15:00:54,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1223 flow [2024-06-04 15:00:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:00:54,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:00:54,482 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 835 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:00:54,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1223 flow [2024-06-04 15:00:54,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1118 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:54,501 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 860 flow [2024-06-04 15:00:54,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-04 15:00:54,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-04 15:00:54,502 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 860 flow [2024-06-04 15:00:54,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-04 15:00:54,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:54,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:54,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:00:54,502 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)] === [2024-06-04 15:00:54,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash 420158890, now seen corresponding path program 3 times [2024-06-04 15:00:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:54,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596289793] [2024-06-04 15:00:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:55,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:55,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596289793] [2024-06-04 15:00:55,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596289793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:55,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:55,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:55,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586126083] [2024-06-04 15:00:55,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:55,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:55,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:55,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:55,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:00:55,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 860 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:55,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:55,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:00:55,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:55,650 INFO L124 PetriNetUnfolderBase]: 1993/2956 cut-off events. [2024-06-04 15:00:55,650 INFO L125 PetriNetUnfolderBase]: For 40414/40426 co-relation queries the response was YES. [2024-06-04 15:00:55,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16089 conditions, 2956 events. 1993/2956 cut-off events. For 40414/40426 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13399 event pairs, 684 based on Foata normal form. 15/2970 useless extension candidates. Maximal degree in co-relation 16049. Up to 2798 conditions per place. [2024-06-04 15:00:55,665 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 42 changer transitions 0/126 dead transitions. [2024-06-04 15:00:55,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 1267 flow [2024-06-04 15:00:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 15:00:55,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-04 15:00:55,667 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 860 flow. Second operand 7 states and 121 transitions. [2024-06-04 15:00:55,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 1267 flow [2024-06-04 15:00:55,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 1161 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 15:00:55,685 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 902 flow [2024-06-04 15:00:55,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-04 15:00:55,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-04 15:00:55,686 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 902 flow [2024-06-04 15:00:55,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:55,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:55,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:55,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:00:55,687 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:55,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash 420167818, now seen corresponding path program 1 times [2024-06-04 15:00:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:55,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572401893] [2024-06-04 15:00:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:55,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:56,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:56,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572401893] [2024-06-04 15:00:56,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572401893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:56,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:56,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:00:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665895445] [2024-06-04 15:00:56,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:56,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:00:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:56,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:00:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:00:56,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:56,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 902 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:56,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:56,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:56,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:57,147 INFO L124 PetriNetUnfolderBase]: 1744/2704 cut-off events. [2024-06-04 15:00:57,147 INFO L125 PetriNetUnfolderBase]: For 37643/37643 co-relation queries the response was YES. [2024-06-04 15:00:57,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14584 conditions, 2704 events. 1744/2704 cut-off events. For 37643/37643 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12886 event pairs, 560 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 14543. Up to 2510 conditions per place. [2024-06-04 15:00:57,161 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 24 changer transitions 0/134 dead transitions. [2024-06-04 15:00:57,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 1336 flow [2024-06-04 15:00:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:00:57,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:00:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:00:57,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:00:57,163 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 902 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:00:57,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 1336 flow [2024-06-04 15:00:57,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 1245 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:57,184 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 923 flow [2024-06-04 15:00:57,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=923, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2024-06-04 15:00:57,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-04 15:00:57,184 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 923 flow [2024-06-04 15:00:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:57,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:57,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:00:57,185 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:57,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1852558405, now seen corresponding path program 1 times [2024-06-04 15:00:57,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:57,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959017396] [2024-06-04 15:00:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:57,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959017396] [2024-06-04 15:00:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959017396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:57,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:00:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921633229] [2024-06-04 15:00:57,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:57,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:00:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:00:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:00:57,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:57,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 923 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:57,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:57,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:57,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:58,273 INFO L124 PetriNetUnfolderBase]: 1741/2699 cut-off events. [2024-06-04 15:00:58,273 INFO L125 PetriNetUnfolderBase]: For 40529/40529 co-relation queries the response was YES. [2024-06-04 15:00:58,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14933 conditions, 2699 events. 1741/2699 cut-off events. For 40529/40529 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12868 event pairs, 579 based on Foata normal form. 1/2699 useless extension candidates. Maximal degree in co-relation 14891. Up to 2579 conditions per place. [2024-06-04 15:00:58,288 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 104 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2024-06-04 15:00:58,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 1167 flow [2024-06-04 15:00:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:00:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:00:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-04 15:00:58,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-04 15:00:58,289 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 923 flow. Second operand 5 states and 83 transitions. [2024-06-04 15:00:58,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 1167 flow [2024-06-04 15:00:58,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 116 transitions, 1069 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:00:58,311 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 847 flow [2024-06-04 15:00:58,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=847, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-04 15:00:58,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-04 15:00:58,312 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 847 flow [2024-06-04 15:00:58,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:58,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:58,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:58,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:00:58,313 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)] === [2024-06-04 15:00:58,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1572490645, now seen corresponding path program 1 times [2024-06-04 15:00:58,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:58,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019058364] [2024-06-04 15:00:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:58,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:59,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:59,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019058364] [2024-06-04 15:00:59,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019058364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:59,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:59,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:00:59,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365500944] [2024-06-04 15:00:59,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:59,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:00:59,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:59,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:00:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:00:59,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:59,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 847 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:59,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:59,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:59,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:59,847 INFO L124 PetriNetUnfolderBase]: 1855/2815 cut-off events. [2024-06-04 15:00:59,848 INFO L125 PetriNetUnfolderBase]: For 49877/49879 co-relation queries the response was YES. [2024-06-04 15:00:59,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15944 conditions, 2815 events. 1855/2815 cut-off events. For 49877/49879 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13129 event pairs, 637 based on Foata normal form. 4/2818 useless extension candidates. Maximal degree in co-relation 15901. Up to 2601 conditions per place. [2024-06-04 15:00:59,865 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 19 changer transitions 0/134 dead transitions. [2024-06-04 15:00:59,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1153 flow [2024-06-04 15:00:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 15:00:59,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-04 15:00:59,874 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 847 flow. Second operand 7 states and 125 transitions. [2024-06-04 15:00:59,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1153 flow [2024-06-04 15:00:59,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1107 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:59,944 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 851 flow [2024-06-04 15:00:59,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-04 15:00:59,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-04 15:00:59,944 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 851 flow [2024-06-04 15:00:59,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:59,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:59,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:59,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:00:59,945 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)] === [2024-06-04 15:00:59,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1572494520, now seen corresponding path program 1 times [2024-06-04 15:00:59,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:59,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469893882] [2024-06-04 15:00:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:59,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:00,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:00,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469893882] [2024-06-04 15:01:00,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469893882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:00,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:00,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:00,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441184618] [2024-06-04 15:01:00,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:00,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:00,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:00,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:00,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 851 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:00,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:00,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:00,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:01,196 INFO L124 PetriNetUnfolderBase]: 2056/3044 cut-off events. [2024-06-04 15:01:01,196 INFO L125 PetriNetUnfolderBase]: For 56151/56151 co-relation queries the response was YES. [2024-06-04 15:01:01,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17520 conditions, 3044 events. 2056/3044 cut-off events. For 56151/56151 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13812 event pairs, 663 based on Foata normal form. 6/3049 useless extension candidates. Maximal degree in co-relation 17477. Up to 2886 conditions per place. [2024-06-04 15:01:01,212 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 32 changer transitions 0/156 dead transitions. [2024-06-04 15:01:01,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 156 transitions, 1521 flow [2024-06-04 15:01:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:01:01,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 15:01:01,215 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 851 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:01:01,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 156 transitions, 1521 flow [2024-06-04 15:01:01,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1473 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:01,240 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 1075 flow [2024-06-04 15:01:01,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-06-04 15:01:01,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-04 15:01:01,240 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 1075 flow [2024-06-04 15:01:01,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:01,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:01,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:01,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:01:01,241 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)] === [2024-06-04 15:01:01,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash -488022284, now seen corresponding path program 2 times [2024-06-04 15:01:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:01,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906289867] [2024-06-04 15:01:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:01,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:02,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:02,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906289867] [2024-06-04 15:01:02,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906289867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:02,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:02,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:02,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601909985] [2024-06-04 15:01:02,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:02,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:02,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:02,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:02,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:02,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 1075 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:02,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:02,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:02,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:02,688 INFO L124 PetriNetUnfolderBase]: 2308/3401 cut-off events. [2024-06-04 15:01:02,688 INFO L125 PetriNetUnfolderBase]: For 72863/72863 co-relation queries the response was YES. [2024-06-04 15:01:02,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21315 conditions, 3401 events. 2308/3401 cut-off events. For 72863/72863 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15660 event pairs, 621 based on Foata normal form. 6/3406 useless extension candidates. Maximal degree in co-relation 21269. Up to 2898 conditions per place. [2024-06-04 15:01:02,708 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 126 selfloop transitions, 44 changer transitions 0/173 dead transitions. [2024-06-04 15:01:02,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 173 transitions, 1961 flow [2024-06-04 15:01:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:01:02,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 15:01:02,709 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 1075 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:01:02,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 173 transitions, 1961 flow [2024-06-04 15:01:02,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 1857 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-04 15:01:02,773 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1290 flow [2024-06-04 15:01:02,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-04 15:01:02,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-04 15:01:02,773 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1290 flow [2024-06-04 15:01:02,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:02,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:02,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:02,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:01:02,776 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)] === [2024-06-04 15:01:02,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash -488016704, now seen corresponding path program 3 times [2024-06-04 15:01:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:02,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91756601] [2024-06-04 15:01:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:03,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91756601] [2024-06-04 15:01:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91756601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:03,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104200037] [2024-06-04 15:01:03,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:03,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:03,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1290 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:03,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:03,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:04,121 INFO L124 PetriNetUnfolderBase]: 2354/3467 cut-off events. [2024-06-04 15:01:04,121 INFO L125 PetriNetUnfolderBase]: For 81748/81748 co-relation queries the response was YES. [2024-06-04 15:01:04,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22920 conditions, 3467 events. 2354/3467 cut-off events. For 81748/81748 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15996 event pairs, 613 based on Foata normal form. 12/3478 useless extension candidates. Maximal degree in co-relation 22871. Up to 2947 conditions per place. [2024-06-04 15:01:04,143 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 57 changer transitions 0/181 dead transitions. [2024-06-04 15:01:04,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 181 transitions, 2114 flow [2024-06-04 15:01:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 15:01:04,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 15:01:04,146 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1290 flow. Second operand 8 states and 148 transitions. [2024-06-04 15:01:04,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 181 transitions, 2114 flow [2024-06-04 15:01:04,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 181 transitions, 1997 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-04 15:01:04,207 INFO L231 Difference]: Finished difference. Result has 115 places, 146 transitions, 1560 flow [2024-06-04 15:01:04,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1560, PETRI_PLACES=115, PETRI_TRANSITIONS=146} [2024-06-04 15:01:04,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-04 15:01:04,207 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 146 transitions, 1560 flow [2024-06-04 15:01:04,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:04,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:04,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:04,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:01:04,208 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)] === [2024-06-04 15:01:04,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:04,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1576219387, now seen corresponding path program 1 times [2024-06-04 15:01:04,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:04,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926956621] [2024-06-04 15:01:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:04,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:05,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:05,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926956621] [2024-06-04 15:01:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926956621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:05,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:05,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990510701] [2024-06-04 15:01:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:05,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:05,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:05,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:05,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 146 transitions, 1560 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:05,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:05,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:05,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:05,847 INFO L124 PetriNetUnfolderBase]: 2342/3449 cut-off events. [2024-06-04 15:01:05,847 INFO L125 PetriNetUnfolderBase]: For 87069/87069 co-relation queries the response was YES. [2024-06-04 15:01:05,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23560 conditions, 3449 events. 2342/3449 cut-off events. For 87069/87069 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15869 event pairs, 676 based on Foata normal form. 3/3451 useless extension candidates. Maximal degree in co-relation 23507. Up to 3366 conditions per place. [2024-06-04 15:01:05,868 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 148 selfloop transitions, 26 changer transitions 0/177 dead transitions. [2024-06-04 15:01:05,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 2132 flow [2024-06-04 15:01:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 15:01:05,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:01:05,892 INFO L175 Difference]: Start difference. First operand has 115 places, 146 transitions, 1560 flow. Second operand 8 states and 136 transitions. [2024-06-04 15:01:05,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 2132 flow [2024-06-04 15:01:05,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 177 transitions, 2047 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 15:01:05,962 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1612 flow [2024-06-04 15:01:05,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2024-06-04 15:01:05,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-04 15:01:05,963 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1612 flow [2024-06-04 15:01:05,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:05,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:05,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:05,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:01:05,963 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)] === [2024-06-04 15:01:05,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash 140291705, now seen corresponding path program 2 times [2024-06-04 15:01:05,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:05,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349543348] [2024-06-04 15:01:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:05,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:06,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:06,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349543348] [2024-06-04 15:01:06,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349543348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:06,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:06,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:06,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122903933] [2024-06-04 15:01:06,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:06,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:06,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:06,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:06,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1612 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:06,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:06,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:06,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:07,586 INFO L124 PetriNetUnfolderBase]: 2368/3488 cut-off events. [2024-06-04 15:01:07,586 INFO L125 PetriNetUnfolderBase]: For 89982/89996 co-relation queries the response was YES. [2024-06-04 15:01:07,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23739 conditions, 3488 events. 2368/3488 cut-off events. For 89982/89996 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16097 event pairs, 658 based on Foata normal form. 17/3504 useless extension candidates. Maximal degree in co-relation 23684. Up to 3270 conditions per place. [2024-06-04 15:01:07,608 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 58 changer transitions 0/188 dead transitions. [2024-06-04 15:01:07,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 188 transitions, 2376 flow [2024-06-04 15:01:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:01:07,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-04 15:01:07,610 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1612 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:01:07,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 188 transitions, 2376 flow [2024-06-04 15:01:07,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 188 transitions, 2275 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:07,678 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1789 flow [2024-06-04 15:01:07,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1789, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-04 15:01:07,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-04 15:01:07,679 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1789 flow [2024-06-04 15:01:07,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:07,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:07,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:07,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:01:07,680 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)] === [2024-06-04 15:01:07,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash 140024578, now seen corresponding path program 4 times [2024-06-04 15:01:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:07,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399903966] [2024-06-04 15:01:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:07,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:08,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399903966] [2024-06-04 15:01:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399903966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:08,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:08,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:08,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46140964] [2024-06-04 15:01:08,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:08,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:08,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:08,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:08,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1789 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:08,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:08,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:08,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:09,055 INFO L124 PetriNetUnfolderBase]: 2520/3706 cut-off events. [2024-06-04 15:01:09,055 INFO L125 PetriNetUnfolderBase]: For 107372/107386 co-relation queries the response was YES. [2024-06-04 15:01:09,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26147 conditions, 3706 events. 2520/3706 cut-off events. For 107372/107386 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17280 event pairs, 608 based on Foata normal form. 20/3725 useless extension candidates. Maximal degree in co-relation 26091. Up to 2755 conditions per place. [2024-06-04 15:01:09,081 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 109 selfloop transitions, 99 changer transitions 0/211 dead transitions. [2024-06-04 15:01:09,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 211 transitions, 2925 flow [2024-06-04 15:01:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:01:09,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 15:01:09,082 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1789 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:01:09,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 211 transitions, 2925 flow [2024-06-04 15:01:09,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2793 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:09,194 INFO L231 Difference]: Finished difference. Result has 127 places, 174 transitions, 2245 flow [2024-06-04 15:01:09,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2245, PETRI_PLACES=127, PETRI_TRANSITIONS=174} [2024-06-04 15:01:09,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-04 15:01:09,195 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 174 transitions, 2245 flow [2024-06-04 15:01:09,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:09,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:09,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:01:09,196 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)] === [2024-06-04 15:01:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1522643882, now seen corresponding path program 5 times [2024-06-04 15:01:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:09,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19628025] [2024-06-04 15:01:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:09,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:09,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19628025] [2024-06-04 15:01:09,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19628025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:09,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:09,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:09,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070629072] [2024-06-04 15:01:09,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:09,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:09,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:09,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 174 transitions, 2245 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:09,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:09,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:09,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:10,602 INFO L124 PetriNetUnfolderBase]: 2620/3848 cut-off events. [2024-06-04 15:01:10,603 INFO L125 PetriNetUnfolderBase]: For 122175/122189 co-relation queries the response was YES. [2024-06-04 15:01:10,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29103 conditions, 3848 events. 2620/3848 cut-off events. For 122175/122189 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18060 event pairs, 642 based on Foata normal form. 14/3861 useless extension candidates. Maximal degree in co-relation 29044. Up to 2820 conditions per place. [2024-06-04 15:01:10,627 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 129 selfloop transitions, 93 changer transitions 0/225 dead transitions. [2024-06-04 15:01:10,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 225 transitions, 3420 flow [2024-06-04 15:01:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:01:10,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-04 15:01:10,628 INFO L175 Difference]: Start difference. First operand has 127 places, 174 transitions, 2245 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:01:10,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 225 transitions, 3420 flow [2024-06-04 15:01:10,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 225 transitions, 3279 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-04 15:01:10,717 INFO L231 Difference]: Finished difference. Result has 136 places, 189 transitions, 2663 flow [2024-06-04 15:01:10,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2663, PETRI_PLACES=136, PETRI_TRANSITIONS=189} [2024-06-04 15:01:10,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-04 15:01:10,718 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 189 transitions, 2663 flow [2024-06-04 15:01:10,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:10,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:10,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:01:10,719 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)] === [2024-06-04 15:01:10,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash 132673145, now seen corresponding path program 3 times [2024-06-04 15:01:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:10,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640853202] [2024-06-04 15:01:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:11,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:11,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640853202] [2024-06-04 15:01:11,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640853202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:11,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:11,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562967453] [2024-06-04 15:01:11,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:11,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:11,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:11,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:11,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 189 transitions, 2663 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:11,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:11,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:11,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:12,342 INFO L124 PetriNetUnfolderBase]: 2614/3838 cut-off events. [2024-06-04 15:01:12,342 INFO L125 PetriNetUnfolderBase]: For 124632/124646 co-relation queries the response was YES. [2024-06-04 15:01:12,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30037 conditions, 3838 events. 2614/3838 cut-off events. For 124632/124646 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17959 event pairs, 693 based on Foata normal form. 17/3854 useless extension candidates. Maximal degree in co-relation 29973. Up to 3670 conditions per place. [2024-06-04 15:01:12,370 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 41 changer transitions 0/215 dead transitions. [2024-06-04 15:01:12,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 215 transitions, 3301 flow [2024-06-04 15:01:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:01:12,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-04 15:01:12,372 INFO L175 Difference]: Start difference. First operand has 136 places, 189 transitions, 2663 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:01:12,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 215 transitions, 3301 flow [2024-06-04 15:01:12,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 215 transitions, 2981 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:12,496 INFO L231 Difference]: Finished difference. Result has 139 places, 189 transitions, 2434 flow [2024-06-04 15:01:12,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2434, PETRI_PLACES=139, PETRI_TRANSITIONS=189} [2024-06-04 15:01:12,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-04 15:01:12,496 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 189 transitions, 2434 flow [2024-06-04 15:01:12,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:12,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:12,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:12,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:01:12,497 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)] === [2024-06-04 15:01:12,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1371838948, now seen corresponding path program 6 times [2024-06-04 15:01:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:12,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651112294] [2024-06-04 15:01:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:12,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:13,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:13,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651112294] [2024-06-04 15:01:13,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651112294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:13,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:13,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:13,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214146871] [2024-06-04 15:01:13,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:13,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:13,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:13,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:13,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 189 transitions, 2434 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:13,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:13,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:13,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:13,809 INFO L124 PetriNetUnfolderBase]: 2590/3808 cut-off events. [2024-06-04 15:01:13,809 INFO L125 PetriNetUnfolderBase]: For 129091/129105 co-relation queries the response was YES. [2024-06-04 15:01:13,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28515 conditions, 3808 events. 2590/3808 cut-off events. For 129091/129105 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17835 event pairs, 644 based on Foata normal form. 20/3827 useless extension candidates. Maximal degree in co-relation 28452. Up to 2810 conditions per place. [2024-06-04 15:01:13,903 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 131 selfloop transitions, 92 changer transitions 0/226 dead transitions. [2024-06-04 15:01:13,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 226 transitions, 3399 flow [2024-06-04 15:01:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:01:13,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 15:01:13,904 INFO L175 Difference]: Start difference. First operand has 139 places, 189 transitions, 2434 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:01:13,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 226 transitions, 3399 flow [2024-06-04 15:01:13,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 226 transitions, 3299 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 15:01:13,980 INFO L231 Difference]: Finished difference. Result has 140 places, 191 transitions, 2586 flow [2024-06-04 15:01:13,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2586, PETRI_PLACES=140, PETRI_TRANSITIONS=191} [2024-06-04 15:01:13,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-04 15:01:13,981 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 191 transitions, 2586 flow [2024-06-04 15:01:13,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-04 15:01:13,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:13,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:13,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:01:13,981 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:13,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:13,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1594733979, now seen corresponding path program 1 times [2024-06-04 15:01:13,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387499583] [2024-06-04 15:01:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:14,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387499583] [2024-06-04 15:01:14,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387499583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:14,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:14,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:01:14,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778821524] [2024-06-04 15:01:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:14,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:01:14,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:01:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:01:14,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:14,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 191 transitions, 2586 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) [2024-06-04 15:01:14,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:14,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:14,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:15,314 INFO L124 PetriNetUnfolderBase]: 2332/3539 cut-off events. [2024-06-04 15:01:15,314 INFO L125 PetriNetUnfolderBase]: For 115767/115767 co-relation queries the response was YES. [2024-06-04 15:01:15,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 3539 events. 2332/3539 cut-off events. For 115767/115767 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17137 event pairs, 588 based on Foata normal form. 2/3540 useless extension candidates. Maximal degree in co-relation 26783. Up to 3414 conditions per place. [2024-06-04 15:01:15,344 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 189 selfloop transitions, 11 changer transitions 0/204 dead transitions. [2024-06-04 15:01:15,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 204 transitions, 3038 flow [2024-06-04 15:01:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:01:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:01:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 15:01:15,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:01:15,345 INFO L175 Difference]: Start difference. First operand has 140 places, 191 transitions, 2586 flow. Second operand 6 states and 96 transitions. [2024-06-04 15:01:15,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 204 transitions, 3038 flow [2024-06-04 15:01:15,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 204 transitions, 2759 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:15,449 INFO L231 Difference]: Finished difference. Result has 140 places, 194 transitions, 2369 flow [2024-06-04 15:01:15,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2369, PETRI_PLACES=140, PETRI_TRANSITIONS=194} [2024-06-04 15:01:15,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-04 15:01:15,449 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 194 transitions, 2369 flow [2024-06-04 15:01:15,450 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) [2024-06-04 15:01:15,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:15,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:15,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:01:15,450 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:15,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1933026383, now seen corresponding path program 1 times [2024-06-04 15:01:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:15,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780657383] [2024-06-04 15:01:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:16,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:16,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780657383] [2024-06-04 15:01:16,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780657383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:16,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:16,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:16,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012286925] [2024-06-04 15:01:16,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:16,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:16,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:16,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:16,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 194 transitions, 2369 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:16,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:16,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:16,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:17,268 INFO L124 PetriNetUnfolderBase]: 2484/3704 cut-off events. [2024-06-04 15:01:17,269 INFO L125 PetriNetUnfolderBase]: For 137180/137186 co-relation queries the response was YES. [2024-06-04 15:01:17,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28101 conditions, 3704 events. 2484/3704 cut-off events. For 137180/137186 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17779 event pairs, 477 based on Foata normal form. 10/3713 useless extension candidates. Maximal degree in co-relation 28037. Up to 3347 conditions per place. [2024-06-04 15:01:17,298 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 17 changer transitions 0/227 dead transitions. [2024-06-04 15:01:17,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 227 transitions, 2893 flow [2024-06-04 15:01:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:01:17,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 15:01:17,300 INFO L175 Difference]: Start difference. First operand has 140 places, 194 transitions, 2369 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:01:17,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 227 transitions, 2893 flow [2024-06-04 15:01:17,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 227 transitions, 2849 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 15:01:17,400 INFO L231 Difference]: Finished difference. Result has 144 places, 196 transitions, 2432 flow [2024-06-04 15:01:17,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2432, PETRI_PLACES=144, PETRI_TRANSITIONS=196} [2024-06-04 15:01:17,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-04 15:01:17,402 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 196 transitions, 2432 flow [2024-06-04 15:01:17,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:17,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:17,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:17,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:01:17,403 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)] === [2024-06-04 15:01:17,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1933086833, now seen corresponding path program 2 times [2024-06-04 15:01:17,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:17,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681414842] [2024-06-04 15:01:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:17,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:18,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:18,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681414842] [2024-06-04 15:01:18,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681414842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:18,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:18,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:18,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180756224] [2024-06-04 15:01:18,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:18,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:18,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:18,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:18,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:18,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:18,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 196 transitions, 2432 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:18,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:18,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:18,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:19,111 INFO L124 PetriNetUnfolderBase]: 2501/3731 cut-off events. [2024-06-04 15:01:19,111 INFO L125 PetriNetUnfolderBase]: For 147129/147135 co-relation queries the response was YES. [2024-06-04 15:01:19,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28749 conditions, 3731 events. 2501/3731 cut-off events. For 147129/147135 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17949 event pairs, 586 based on Foata normal form. 10/3740 useless extension candidates. Maximal degree in co-relation 28684. Up to 3377 conditions per place. [2024-06-04 15:01:19,140 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 21 changer transitions 0/229 dead transitions. [2024-06-04 15:01:19,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 229 transitions, 2966 flow [2024-06-04 15:01:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:01:19,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:01:19,142 INFO L175 Difference]: Start difference. First operand has 144 places, 196 transitions, 2432 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:01:19,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 229 transitions, 2966 flow [2024-06-04 15:01:19,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 229 transitions, 2877 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:19,265 INFO L231 Difference]: Finished difference. Result has 146 places, 198 transitions, 2463 flow [2024-06-04 15:01:19,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2463, PETRI_PLACES=146, PETRI_TRANSITIONS=198} [2024-06-04 15:01:19,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-04 15:01:19,266 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 198 transitions, 2463 flow [2024-06-04 15:01:19,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:19,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:19,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:19,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:01:19,266 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)] === [2024-06-04 15:01:19,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:19,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1933086957, now seen corresponding path program 1 times [2024-06-04 15:01:19,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:19,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748601210] [2024-06-04 15:01:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:19,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:20,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748601210] [2024-06-04 15:01:20,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748601210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:20,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:20,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899667182] [2024-06-04 15:01:20,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:20,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:20,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:20,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:20,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:20,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 198 transitions, 2463 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:20,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:20,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:20,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:21,077 INFO L124 PetriNetUnfolderBase]: 2609/3838 cut-off events. [2024-06-04 15:01:21,077 INFO L125 PetriNetUnfolderBase]: For 155410/155410 co-relation queries the response was YES. [2024-06-04 15:01:21,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29579 conditions, 3838 events. 2609/3838 cut-off events. For 155410/155410 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18010 event pairs, 596 based on Foata normal form. 3/3840 useless extension candidates. Maximal degree in co-relation 29513. Up to 3647 conditions per place. [2024-06-04 15:01:21,111 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2024-06-04 15:01:21,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 239 transitions, 3364 flow [2024-06-04 15:01:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 15:01:21,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 15:01:21,113 INFO L175 Difference]: Start difference. First operand has 146 places, 198 transitions, 2463 flow. Second operand 8 states and 143 transitions. [2024-06-04 15:01:21,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 239 transitions, 3364 flow [2024-06-04 15:01:21,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 239 transitions, 3264 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:21,272 INFO L231 Difference]: Finished difference. Result has 149 places, 205 transitions, 2650 flow [2024-06-04 15:01:21,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2650, PETRI_PLACES=149, PETRI_TRANSITIONS=205} [2024-06-04 15:01:21,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-04 15:01:21,273 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 205 transitions, 2650 flow [2024-06-04 15:01:21,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:21,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:21,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:01:21,274 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)] === [2024-06-04 15:01:21,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1502690957, now seen corresponding path program 1 times [2024-06-04 15:01:21,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:21,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115216011] [2024-06-04 15:01:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:22,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:22,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115216011] [2024-06-04 15:01:22,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115216011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:22,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:22,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824365812] [2024-06-04 15:01:22,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:22,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:22,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:22,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:22,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:22,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:22,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 205 transitions, 2650 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:22,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:22,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:22,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:22,862 INFO L124 PetriNetUnfolderBase]: 2597/3822 cut-off events. [2024-06-04 15:01:22,862 INFO L125 PetriNetUnfolderBase]: For 162413/162413 co-relation queries the response was YES. [2024-06-04 15:01:22,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29757 conditions, 3822 events. 2597/3822 cut-off events. For 162413/162413 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17953 event pairs, 570 based on Foata normal form. 6/3827 useless extension candidates. Maximal degree in co-relation 29689. Up to 3401 conditions per place. [2024-06-04 15:01:22,894 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 171 selfloop transitions, 67 changer transitions 0/241 dead transitions. [2024-06-04 15:01:22,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 241 transitions, 3393 flow [2024-06-04 15:01:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:01:22,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:01:22,896 INFO L175 Difference]: Start difference. First operand has 149 places, 205 transitions, 2650 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:01:22,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 241 transitions, 3393 flow [2024-06-04 15:01:23,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 241 transitions, 3238 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:23,071 INFO L231 Difference]: Finished difference. Result has 154 places, 210 transitions, 2777 flow [2024-06-04 15:01:23,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2777, PETRI_PLACES=154, PETRI_TRANSITIONS=210} [2024-06-04 15:01:23,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-04 15:01:23,072 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 2777 flow [2024-06-04 15:01:23,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:23,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:23,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:23,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:01:23,072 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)] === [2024-06-04 15:01:23,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1618161865, now seen corresponding path program 1 times [2024-06-04 15:01:23,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:23,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406187242] [2024-06-04 15:01:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:23,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:24,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:24,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406187242] [2024-06-04 15:01:24,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406187242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:24,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:24,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:24,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850900760] [2024-06-04 15:01:24,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:24,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:24,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:24,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:24,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 2777 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:24,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:24,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:24,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:24,912 INFO L124 PetriNetUnfolderBase]: 2749/4070 cut-off events. [2024-06-04 15:01:24,913 INFO L125 PetriNetUnfolderBase]: For 194826/194826 co-relation queries the response was YES. [2024-06-04 15:01:24,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32015 conditions, 4070 events. 2749/4070 cut-off events. For 194826/194826 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19579 event pairs, 583 based on Foata normal form. 36/4105 useless extension candidates. Maximal degree in co-relation 31945. Up to 3445 conditions per place. [2024-06-04 15:01:24,946 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 180 selfloop transitions, 70 changer transitions 0/253 dead transitions. [2024-06-04 15:01:24,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 253 transitions, 3605 flow [2024-06-04 15:01:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 15:01:24,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 15:01:24,948 INFO L175 Difference]: Start difference. First operand has 154 places, 210 transitions, 2777 flow. Second operand 9 states and 163 transitions. [2024-06-04 15:01:24,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 253 transitions, 3605 flow [2024-06-04 15:01:25,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 253 transitions, 3485 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:25,127 INFO L231 Difference]: Finished difference. Result has 158 places, 213 transitions, 2895 flow [2024-06-04 15:01:25,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2895, PETRI_PLACES=158, PETRI_TRANSITIONS=213} [2024-06-04 15:01:25,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-04 15:01:25,128 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 213 transitions, 2895 flow [2024-06-04 15:01:25,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:25,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:25,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:01:25,128 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)] === [2024-06-04 15:01:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1617977167, now seen corresponding path program 3 times [2024-06-04 15:01:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461656454] [2024-06-04 15:01:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461656454] [2024-06-04 15:01:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461656454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:26,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:26,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20658888] [2024-06-04 15:01:26,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:26,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:26,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:26,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:26,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 213 transitions, 2895 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:26,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:26,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:26,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:26,968 INFO L124 PetriNetUnfolderBase]: 2634/3964 cut-off events. [2024-06-04 15:01:26,968 INFO L125 PetriNetUnfolderBase]: For 181519/181525 co-relation queries the response was YES. [2024-06-04 15:01:26,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31758 conditions, 3964 events. 2634/3964 cut-off events. For 181519/181525 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19675 event pairs, 569 based on Foata normal form. 10/3973 useless extension candidates. Maximal degree in co-relation 31687. Up to 3570 conditions per place. [2024-06-04 15:01:26,996 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 26 changer transitions 0/244 dead transitions. [2024-06-04 15:01:26,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 244 transitions, 3451 flow [2024-06-04 15:01:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:26,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:01:26,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:01:26,998 INFO L175 Difference]: Start difference. First operand has 158 places, 213 transitions, 2895 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:01:26,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 244 transitions, 3451 flow [2024-06-04 15:01:27,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 244 transitions, 3269 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:01:27,168 INFO L231 Difference]: Finished difference. Result has 159 places, 215 transitions, 2848 flow [2024-06-04 15:01:27,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2848, PETRI_PLACES=159, PETRI_TRANSITIONS=215} [2024-06-04 15:01:27,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-04 15:01:27,169 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 215 transitions, 2848 flow [2024-06-04 15:01:27,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:27,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:27,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:27,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:01:27,170 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:27,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:27,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1175340984, now seen corresponding path program 1 times [2024-06-04 15:01:27,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:27,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492008839] [2024-06-04 15:01:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:27,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:27,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:27,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492008839] [2024-06-04 15:01:27,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492008839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:27,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:27,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:01:27,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468314955] [2024-06-04 15:01:27,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:27,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:01:27,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:01:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:01:27,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:27,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 215 transitions, 2848 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:27,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:27,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:27,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:28,559 INFO L124 PetriNetUnfolderBase]: 2771/4104 cut-off events. [2024-06-04 15:01:28,559 INFO L125 PetriNetUnfolderBase]: For 186998/186998 co-relation queries the response was YES. [2024-06-04 15:01:28,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32308 conditions, 4104 events. 2771/4104 cut-off events. For 186998/186998 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19806 event pairs, 632 based on Foata normal form. 1/4104 useless extension candidates. Maximal degree in co-relation 32236. Up to 4066 conditions per place. [2024-06-04 15:01:28,591 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 215 selfloop transitions, 16 changer transitions 0/234 dead transitions. [2024-06-04 15:01:28,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 234 transitions, 3468 flow [2024-06-04 15:01:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:01:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:01:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-04 15:01:28,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 15:01:28,592 INFO L175 Difference]: Start difference. First operand has 159 places, 215 transitions, 2848 flow. Second operand 6 states and 99 transitions. [2024-06-04 15:01:28,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 234 transitions, 3468 flow [2024-06-04 15:01:28,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 234 transitions, 3351 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:28,749 INFO L231 Difference]: Finished difference. Result has 159 places, 218 transitions, 2821 flow [2024-06-04 15:01:28,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2821, PETRI_PLACES=159, PETRI_TRANSITIONS=218} [2024-06-04 15:01:28,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-04 15:01:28,750 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 218 transitions, 2821 flow [2024-06-04 15:01:28,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:28,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:28,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:28,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:01:28,751 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)] === [2024-06-04 15:01:28,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash 42853987, now seen corresponding path program 2 times [2024-06-04 15:01:28,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:28,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354120298] [2024-06-04 15:01:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:28,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:29,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:29,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354120298] [2024-06-04 15:01:29,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354120298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:29,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:29,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:01:29,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232547656] [2024-06-04 15:01:29,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:29,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:01:29,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:29,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:01:29,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:01:29,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:29,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 218 transitions, 2821 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:29,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:29,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:29,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:30,318 INFO L124 PetriNetUnfolderBase]: 2759/4092 cut-off events. [2024-06-04 15:01:30,318 INFO L125 PetriNetUnfolderBase]: For 193820/193834 co-relation queries the response was YES. [2024-06-04 15:01:30,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32006 conditions, 4092 events. 2759/4092 cut-off events. For 193820/193834 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19831 event pairs, 568 based on Foata normal form. 14/4105 useless extension candidates. Maximal degree in co-relation 31933. Up to 3463 conditions per place. [2024-06-04 15:01:30,348 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 166 selfloop transitions, 87 changer transitions 0/256 dead transitions. [2024-06-04 15:01:30,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 256 transitions, 3680 flow [2024-06-04 15:01:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:01:30,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 15:01:30,350 INFO L175 Difference]: Start difference. First operand has 159 places, 218 transitions, 2821 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:01:30,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 256 transitions, 3680 flow [2024-06-04 15:01:30,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 256 transitions, 3590 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 15:01:30,537 INFO L231 Difference]: Finished difference. Result has 165 places, 225 transitions, 3033 flow [2024-06-04 15:01:30,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3033, PETRI_PLACES=165, PETRI_TRANSITIONS=225} [2024-06-04 15:01:30,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-04 15:01:30,537 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 225 transitions, 3033 flow [2024-06-04 15:01:30,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:30,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:30,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:30,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:01:30,538 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)] === [2024-06-04 15:01:30,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash 42860745, now seen corresponding path program 2 times [2024-06-04 15:01:30,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:30,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050265686] [2024-06-04 15:01:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:30,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:31,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:31,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050265686] [2024-06-04 15:01:31,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050265686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:31,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:31,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:31,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163445976] [2024-06-04 15:01:31,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:31,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:31,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 225 transitions, 3033 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:31,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:31,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:31,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:32,468 INFO L124 PetriNetUnfolderBase]: 2911/4340 cut-off events. [2024-06-04 15:01:32,468 INFO L125 PetriNetUnfolderBase]: For 229709/229723 co-relation queries the response was YES. [2024-06-04 15:01:32,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34593 conditions, 4340 events. 2911/4340 cut-off events. For 229709/229723 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21494 event pairs, 584 based on Foata normal form. 44/4383 useless extension candidates. Maximal degree in co-relation 34517. Up to 3507 conditions per place. [2024-06-04 15:01:32,505 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 175 selfloop transitions, 90 changer transitions 0/268 dead transitions. [2024-06-04 15:01:32,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3985 flow [2024-06-04 15:01:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:01:32,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-04 15:01:32,506 INFO L175 Difference]: Start difference. First operand has 165 places, 225 transitions, 3033 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:01:32,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3985 flow [2024-06-04 15:01:32,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 268 transitions, 3818 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:32,685 INFO L231 Difference]: Finished difference. Result has 168 places, 228 transitions, 3154 flow [2024-06-04 15:01:32,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3154, PETRI_PLACES=168, PETRI_TRANSITIONS=228} [2024-06-04 15:01:32,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-04 15:01:32,686 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 228 transitions, 3154 flow [2024-06-04 15:01:32,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:32,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:32,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:32,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:01:32,686 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:32,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash 42676047, now seen corresponding path program 4 times [2024-06-04 15:01:32,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:32,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35021102] [2024-06-04 15:01:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:33,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35021102] [2024-06-04 15:01:33,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35021102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:33,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:33,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:33,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600676085] [2024-06-04 15:01:33,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:33,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:33,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:33,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 228 transitions, 3154 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:33,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:33,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:33,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:34,469 INFO L124 PetriNetUnfolderBase]: 2753/4177 cut-off events. [2024-06-04 15:01:34,469 INFO L125 PetriNetUnfolderBase]: For 210740/210760 co-relation queries the response was YES. [2024-06-04 15:01:34,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33618 conditions, 4177 events. 2753/4177 cut-off events. For 210740/210760 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21281 event pairs, 572 based on Foata normal form. 18/4194 useless extension candidates. Maximal degree in co-relation 33542. Up to 3723 conditions per place. [2024-06-04 15:01:34,508 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 33 changer transitions 0/256 dead transitions. [2024-06-04 15:01:34,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 256 transitions, 3722 flow [2024-06-04 15:01:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:01:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:01:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:01:34,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 15:01:34,510 INFO L175 Difference]: Start difference. First operand has 168 places, 228 transitions, 3154 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:01:34,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 256 transitions, 3722 flow [2024-06-04 15:01:34,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 256 transitions, 3513 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:34,716 INFO L231 Difference]: Finished difference. Result has 170 places, 230 transitions, 3100 flow [2024-06-04 15:01:34,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3100, PETRI_PLACES=170, PETRI_TRANSITIONS=230} [2024-06-04 15:01:34,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-04 15:01:34,717 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 230 transitions, 3100 flow [2024-06-04 15:01:34,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:34,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:34,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:34,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:01:34,718 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)] === [2024-06-04 15:01:34,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash 270761895, now seen corresponding path program 3 times [2024-06-04 15:01:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:34,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502978353] [2024-06-04 15:01:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:35,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:35,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502978353] [2024-06-04 15:01:35,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502978353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:35,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:35,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:35,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749091866] [2024-06-04 15:01:35,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:35,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:35,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:35,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:35,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:35,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 230 transitions, 3100 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:35,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:35,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:35,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:36,499 INFO L124 PetriNetUnfolderBase]: 3061/4586 cut-off events. [2024-06-04 15:01:36,499 INFO L125 PetriNetUnfolderBase]: For 242969/242983 co-relation queries the response was YES. [2024-06-04 15:01:36,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35680 conditions, 4586 events. 3061/4586 cut-off events. For 242969/242983 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23120 event pairs, 585 based on Foata normal form. 50/4635 useless extension candidates. Maximal degree in co-relation 35603. Up to 3769 conditions per place. [2024-06-04 15:01:36,542 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 106 changer transitions 0/276 dead transitions. [2024-06-04 15:01:36,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 276 transitions, 4048 flow [2024-06-04 15:01:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:01:36,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-04 15:01:36,544 INFO L175 Difference]: Start difference. First operand has 170 places, 230 transitions, 3100 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:01:36,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 276 transitions, 4048 flow [2024-06-04 15:01:36,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3867 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:36,788 INFO L231 Difference]: Finished difference. Result has 175 places, 238 transitions, 3319 flow [2024-06-04 15:01:36,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3319, PETRI_PLACES=175, PETRI_TRANSITIONS=238} [2024-06-04 15:01:36,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-04 15:01:36,789 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 238 transitions, 3319 flow [2024-06-04 15:01:36,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:36,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:36,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:36,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:01:36,790 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)] === [2024-06-04 15:01:36,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash 279332775, now seen corresponding path program 4 times [2024-06-04 15:01:36,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:36,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560384158] [2024-06-04 15:01:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:36,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:37,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:37,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560384158] [2024-06-04 15:01:37,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560384158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:37,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:37,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:37,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699956721] [2024-06-04 15:01:37,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:37,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:37,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:37,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:37,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:37,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 238 transitions, 3319 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:37,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:37,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:37,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:38,748 INFO L124 PetriNetUnfolderBase]: 3102/4647 cut-off events. [2024-06-04 15:01:38,749 INFO L125 PetriNetUnfolderBase]: For 244373/244387 co-relation queries the response was YES. [2024-06-04 15:01:38,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37474 conditions, 4647 events. 3102/4647 cut-off events. For 244373/244387 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23558 event pairs, 628 based on Foata normal form. 20/4666 useless extension candidates. Maximal degree in co-relation 37394. Up to 4252 conditions per place. [2024-06-04 15:01:38,794 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-04 15:01:38,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 283 transitions, 4597 flow [2024-06-04 15:01:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:01:38,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 15:01:38,798 INFO L175 Difference]: Start difference. First operand has 175 places, 238 transitions, 3319 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:01:38,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 283 transitions, 4597 flow [2024-06-04 15:01:39,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 283 transitions, 4329 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:39,087 INFO L231 Difference]: Finished difference. Result has 180 places, 250 transitions, 3599 flow [2024-06-04 15:01:39,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3599, PETRI_PLACES=180, PETRI_TRANSITIONS=250} [2024-06-04 15:01:39,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-04 15:01:39,089 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 250 transitions, 3599 flow [2024-06-04 15:01:39,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:39,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:39,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:01:39,090 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)] === [2024-06-04 15:01:39,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash 54076683, now seen corresponding path program 5 times [2024-06-04 15:01:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:39,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308067628] [2024-06-04 15:01:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:40,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:40,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308067628] [2024-06-04 15:01:40,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308067628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:40,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:40,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:40,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818475593] [2024-06-04 15:01:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:40,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:40,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:40,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:40,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 250 transitions, 3599 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:40,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:40,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:40,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:41,006 INFO L124 PetriNetUnfolderBase]: 3092/4635 cut-off events. [2024-06-04 15:01:41,007 INFO L125 PetriNetUnfolderBase]: For 245279/245293 co-relation queries the response was YES. [2024-06-04 15:01:41,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36964 conditions, 4635 events. 3092/4635 cut-off events. For 245279/245293 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23502 event pairs, 586 based on Foata normal form. 14/4648 useless extension candidates. Maximal degree in co-relation 36882. Up to 3820 conditions per place. [2024-06-04 15:01:41,050 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 151 selfloop transitions, 129 changer transitions 0/283 dead transitions. [2024-06-04 15:01:41,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 283 transitions, 4401 flow [2024-06-04 15:01:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:01:41,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 15:01:41,051 INFO L175 Difference]: Start difference. First operand has 180 places, 250 transitions, 3599 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:01:41,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 283 transitions, 4401 flow [2024-06-04 15:01:41,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 283 transitions, 4080 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:41,333 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3544 flow [2024-06-04 15:01:41,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3544, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-04 15:01:41,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 15:01:41,334 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3544 flow [2024-06-04 15:01:41,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:41,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:41,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:41,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:01:41,334 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:41,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2102842074, now seen corresponding path program 2 times [2024-06-04 15:01:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:41,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030857123] [2024-06-04 15:01:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:41,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:41,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:41,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030857123] [2024-06-04 15:01:41,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030857123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:41,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:41,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:01:41,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499109543] [2024-06-04 15:01:41,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:41,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:01:41,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:01:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:01:42,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:42,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3544 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:42,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:42,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:42,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:42,788 INFO L124 PetriNetUnfolderBase]: 3089/4629 cut-off events. [2024-06-04 15:01:42,788 INFO L125 PetriNetUnfolderBase]: For 246857/246871 co-relation queries the response was YES. [2024-06-04 15:01:42,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37093 conditions, 4629 events. 3089/4629 cut-off events. For 246857/246871 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23450 event pairs, 696 based on Foata normal form. 15/4643 useless extension candidates. Maximal degree in co-relation 37009. Up to 4590 conditions per place. [2024-06-04 15:01:42,832 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 240 selfloop transitions, 16 changer transitions 0/259 dead transitions. [2024-06-04 15:01:42,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 259 transitions, 4078 flow [2024-06-04 15:01:42,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:01:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:01:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-04 15:01:42,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-04 15:01:42,834 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3544 flow. Second operand 6 states and 92 transitions. [2024-06-04 15:01:42,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 259 transitions, 4078 flow [2024-06-04 15:01:43,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 259 transitions, 3787 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:43,061 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3291 flow [2024-06-04 15:01:43,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3291, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-04 15:01:43,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 15:01:43,061 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3291 flow [2024-06-04 15:01:43,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:43,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:43,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:43,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:01:43,065 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:43,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:43,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1181060856, now seen corresponding path program 1 times [2024-06-04 15:01:43,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:43,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64926343] [2024-06-04 15:01:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:43,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:43,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:43,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64926343] [2024-06-04 15:01:43,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64926343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:43,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:43,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:01:43,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842290519] [2024-06-04 15:01:43,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:43,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:01:43,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:01:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:01:43,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:43,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3291 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:43,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:43,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:43,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:44,386 INFO L124 PetriNetUnfolderBase]: 2842/4376 cut-off events. [2024-06-04 15:01:44,386 INFO L125 PetriNetUnfolderBase]: For 217618/217618 co-relation queries the response was YES. [2024-06-04 15:01:44,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33461 conditions, 4376 events. 2842/4376 cut-off events. For 217618/217618 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22830 event pairs, 605 based on Foata normal form. 2/4377 useless extension candidates. Maximal degree in co-relation 33376. Up to 4224 conditions per place. [2024-06-04 15:01:44,423 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 19 changer transitions 0/266 dead transitions. [2024-06-04 15:01:44,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 266 transitions, 3972 flow [2024-06-04 15:01:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:01:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:01:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-04 15:01:44,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-04 15:01:44,425 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3291 flow. Second operand 6 states and 103 transitions. [2024-06-04 15:01:44,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 266 transitions, 3972 flow [2024-06-04 15:01:44,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 266 transitions, 3932 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:44,634 INFO L231 Difference]: Finished difference. Result has 185 places, 253 transitions, 3342 flow [2024-06-04 15:01:44,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3342, PETRI_PLACES=185, PETRI_TRANSITIONS=253} [2024-06-04 15:01:44,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-04 15:01:44,635 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 253 transitions, 3342 flow [2024-06-04 15:01:44,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:44,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:44,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:44,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:01:44,635 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:44,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2103597606, now seen corresponding path program 2 times [2024-06-04 15:01:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:44,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466383090] [2024-06-04 15:01:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:44,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:45,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:45,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466383090] [2024-06-04 15:01:45,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466383090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:45,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:45,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:01:45,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573793475] [2024-06-04 15:01:45,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:45,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:01:45,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:45,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:01:45,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:01:45,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:45,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 253 transitions, 3342 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:45,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:45,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:45,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:45,990 INFO L124 PetriNetUnfolderBase]: 2792/4296 cut-off events. [2024-06-04 15:01:45,990 INFO L125 PetriNetUnfolderBase]: For 223631/223631 co-relation queries the response was YES. [2024-06-04 15:01:46,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33176 conditions, 4296 events. 2792/4296 cut-off events. For 223631/223631 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22333 event pairs, 598 based on Foata normal form. 1/4296 useless extension candidates. Maximal degree in co-relation 33090. Up to 4175 conditions per place. [2024-06-04 15:01:46,026 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 247 selfloop transitions, 11 changer transitions 0/262 dead transitions. [2024-06-04 15:01:46,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 262 transitions, 3880 flow [2024-06-04 15:01:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:01:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:01:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-04 15:01:46,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-04 15:01:46,027 INFO L175 Difference]: Start difference. First operand has 185 places, 253 transitions, 3342 flow. Second operand 6 states and 95 transitions. [2024-06-04 15:01:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 262 transitions, 3880 flow [2024-06-04 15:01:46,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 262 transitions, 3851 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:01:46,243 INFO L231 Difference]: Finished difference. Result has 188 places, 253 transitions, 3341 flow [2024-06-04 15:01:46,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3341, PETRI_PLACES=188, PETRI_TRANSITIONS=253} [2024-06-04 15:01:46,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-04 15:01:46,244 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 253 transitions, 3341 flow [2024-06-04 15:01:46,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:46,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:46,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:46,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:01:46,244 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)] === [2024-06-04 15:01:46,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:46,245 INFO L85 PathProgramCache]: Analyzing trace with hash -749939047, now seen corresponding path program 1 times [2024-06-04 15:01:46,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:46,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716138634] [2024-06-04 15:01:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:46,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:47,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716138634] [2024-06-04 15:01:47,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716138634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:47,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:47,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:47,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850683473] [2024-06-04 15:01:47,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:47,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:47,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:47,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:47,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:47,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 253 transitions, 3341 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:47,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:47,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:47,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:48,364 INFO L124 PetriNetUnfolderBase]: 3200/4797 cut-off events. [2024-06-04 15:01:48,364 INFO L125 PetriNetUnfolderBase]: For 284033/284037 co-relation queries the response was YES. [2024-06-04 15:01:48,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38532 conditions, 4797 events. 3200/4797 cut-off events. For 284033/284037 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24366 event pairs, 681 based on Foata normal form. 10/4806 useless extension candidates. Maximal degree in co-relation 38445. Up to 4545 conditions per place. [2024-06-04 15:01:48,407 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 275 selfloop transitions, 46 changer transitions 0/324 dead transitions. [2024-06-04 15:01:48,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 324 transitions, 4972 flow [2024-06-04 15:01:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:01:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:01:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-04 15:01:48,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:01:48,410 INFO L175 Difference]: Start difference. First operand has 188 places, 253 transitions, 3341 flow. Second operand 10 states and 168 transitions. [2024-06-04 15:01:48,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 324 transitions, 4972 flow [2024-06-04 15:01:48,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 324 transitions, 4923 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:48,703 INFO L231 Difference]: Finished difference. Result has 197 places, 279 transitions, 3942 flow [2024-06-04 15:01:48,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3942, PETRI_PLACES=197, PETRI_TRANSITIONS=279} [2024-06-04 15:01:48,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-04 15:01:48,703 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 279 transitions, 3942 flow [2024-06-04 15:01:48,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:48,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:48,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:48,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:01:48,704 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:48,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1491980091, now seen corresponding path program 2 times [2024-06-04 15:01:48,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:48,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822609750] [2024-06-04 15:01:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:49,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:49,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822609750] [2024-06-04 15:01:49,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822609750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:49,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:49,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:49,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457078047] [2024-06-04 15:01:49,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:49,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:49,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:49,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:49,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:49,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 279 transitions, 3942 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:49,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:49,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:49,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:50,758 INFO L124 PetriNetUnfolderBase]: 3455/5182 cut-off events. [2024-06-04 15:01:50,758 INFO L125 PetriNetUnfolderBase]: For 321773/321789 co-relation queries the response was YES. [2024-06-04 15:01:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43360 conditions, 5182 events. 3455/5182 cut-off events. For 321773/321789 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26783 event pairs, 665 based on Foata normal form. 22/5203 useless extension candidates. Maximal degree in co-relation 43267. Up to 4794 conditions per place. [2024-06-04 15:01:50,819 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 287 selfloop transitions, 76 changer transitions 0/366 dead transitions. [2024-06-04 15:01:50,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 366 transitions, 6031 flow [2024-06-04 15:01:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:01:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:01:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-04 15:01:50,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:01:50,820 INFO L175 Difference]: Start difference. First operand has 197 places, 279 transitions, 3942 flow. Second operand 10 states and 175 transitions. [2024-06-04 15:01:50,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 366 transitions, 6031 flow [2024-06-04 15:01:51,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 366 transitions, 5745 flow, removed 142 selfloop flow, removed 1 redundant places. [2024-06-04 15:01:51,163 INFO L231 Difference]: Finished difference. Result has 209 places, 317 transitions, 4769 flow [2024-06-04 15:01:51,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4769, PETRI_PLACES=209, PETRI_TRANSITIONS=317} [2024-06-04 15:01:51,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-04 15:01:51,164 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 317 transitions, 4769 flow [2024-06-04 15:01:51,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:51,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:51,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:51,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:01:51,165 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)] === [2024-06-04 15:01:51,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:51,165 INFO L85 PathProgramCache]: Analyzing trace with hash 246588793, now seen corresponding path program 3 times [2024-06-04 15:01:51,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:51,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344728759] [2024-06-04 15:01:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:51,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:52,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:52,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344728759] [2024-06-04 15:01:52,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344728759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:52,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:52,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:52,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559309901] [2024-06-04 15:01:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:52,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:52,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:52,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:52,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:52,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 317 transitions, 4769 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:52,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:52,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:52,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:53,365 INFO L124 PetriNetUnfolderBase]: 3534/5307 cut-off events. [2024-06-04 15:01:53,365 INFO L125 PetriNetUnfolderBase]: For 348958/348970 co-relation queries the response was YES. [2024-06-04 15:01:53,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45490 conditions, 5307 events. 3534/5307 cut-off events. For 348958/348970 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27647 event pairs, 748 based on Foata normal form. 18/5324 useless extension candidates. Maximal degree in co-relation 45391. Up to 4839 conditions per place. [2024-06-04 15:01:53,417 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 75 changer transitions 0/362 dead transitions. [2024-06-04 15:01:53,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 362 transitions, 6209 flow [2024-06-04 15:01:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:01:53,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 15:01:53,419 INFO L175 Difference]: Start difference. First operand has 209 places, 317 transitions, 4769 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:01:53,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 362 transitions, 6209 flow [2024-06-04 15:01:53,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 362 transitions, 6004 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-04 15:01:53,805 INFO L231 Difference]: Finished difference. Result has 215 places, 323 transitions, 4940 flow [2024-06-04 15:01:53,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4940, PETRI_PLACES=215, PETRI_TRANSITIONS=323} [2024-06-04 15:01:53,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-04 15:01:53,806 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 323 transitions, 4940 flow [2024-06-04 15:01:53,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:53,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:53,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:53,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:01:53,807 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)] === [2024-06-04 15:01:53,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash -120728649, now seen corresponding path program 4 times [2024-06-04 15:01:53,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:53,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469305863] [2024-06-04 15:01:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:54,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:54,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469305863] [2024-06-04 15:01:54,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469305863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:54,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:54,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:54,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174900248] [2024-06-04 15:01:54,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:54,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:54,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:54,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:54,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 323 transitions, 4940 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:54,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:54,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:54,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:56,071 INFO L124 PetriNetUnfolderBase]: 3537/5312 cut-off events. [2024-06-04 15:01:56,071 INFO L125 PetriNetUnfolderBase]: For 363010/363022 co-relation queries the response was YES. [2024-06-04 15:01:56,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45877 conditions, 5312 events. 3537/5312 cut-off events. For 363010/363022 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27677 event pairs, 744 based on Foata normal form. 18/5329 useless extension candidates. Maximal degree in co-relation 45775. Up to 4942 conditions per place. [2024-06-04 15:01:56,119 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 77 changer transitions 0/362 dead transitions. [2024-06-04 15:01:56,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 362 transitions, 6076 flow [2024-06-04 15:01:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:01:56,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 15:01:56,121 INFO L175 Difference]: Start difference. First operand has 215 places, 323 transitions, 4940 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:01:56,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 362 transitions, 6076 flow [2024-06-04 15:01:56,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 362 transitions, 5768 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:56,586 INFO L231 Difference]: Finished difference. Result has 218 places, 326 transitions, 4923 flow [2024-06-04 15:01:56,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4923, PETRI_PLACES=218, PETRI_TRANSITIONS=326} [2024-06-04 15:01:56,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 15:01:56,586 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 326 transitions, 4923 flow [2024-06-04 15:01:56,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:56,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:56,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:56,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:01:56,587 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:56,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:56,587 INFO L85 PathProgramCache]: Analyzing trace with hash -832588225, now seen corresponding path program 5 times [2024-06-04 15:01:56,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:56,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289630542] [2024-06-04 15:01:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:56,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:57,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:57,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289630542] [2024-06-04 15:01:57,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289630542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:57,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:57,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:57,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112722888] [2024-06-04 15:01:57,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:57,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:57,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:57,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:01:57,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 326 transitions, 4923 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:57,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:57,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:01:57,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:58,878 INFO L124 PetriNetUnfolderBase]: 3689/5560 cut-off events. [2024-06-04 15:01:58,878 INFO L125 PetriNetUnfolderBase]: For 418336/418344 co-relation queries the response was YES. [2024-06-04 15:01:58,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47654 conditions, 5560 events. 3689/5560 cut-off events. For 418336/418344 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29386 event pairs, 710 based on Foata normal form. 44/5603 useless extension candidates. Maximal degree in co-relation 47551. Up to 4709 conditions per place. [2024-06-04 15:01:58,934 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 261 selfloop transitions, 104 changer transitions 0/368 dead transitions. [2024-06-04 15:01:58,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 368 transitions, 6099 flow [2024-06-04 15:01:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:01:58,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 15:01:58,938 INFO L175 Difference]: Start difference. First operand has 218 places, 326 transitions, 4923 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:01:58,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 368 transitions, 6099 flow [2024-06-04 15:01:59,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 368 transitions, 5866 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 15:01:59,498 INFO L231 Difference]: Finished difference. Result has 220 places, 329 transitions, 5034 flow [2024-06-04 15:01:59,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5034, PETRI_PLACES=220, PETRI_TRANSITIONS=329} [2024-06-04 15:01:59,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 15:01:59,498 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 329 transitions, 5034 flow [2024-06-04 15:01:59,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:01:59,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:59,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:59,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:01:59,499 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:59,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash 394417315, now seen corresponding path program 1 times [2024-06-04 15:01:59,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:59,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883762429] [2024-06-04 15:01:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:00,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883762429] [2024-06-04 15:02:00,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883762429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:00,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:00,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:00,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883171369] [2024-06-04 15:02:00,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:00,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:00,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:00,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:00,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 329 transitions, 5034 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:00,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:00,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:00,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:01,523 INFO L124 PetriNetUnfolderBase]: 3917/5932 cut-off events. [2024-06-04 15:02:01,523 INFO L125 PetriNetUnfolderBase]: For 472720/472728 co-relation queries the response was YES. [2024-06-04 15:02:01,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52601 conditions, 5932 events. 3917/5932 cut-off events. For 472720/472728 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31933 event pairs, 747 based on Foata normal form. 32/5963 useless extension candidates. Maximal degree in co-relation 52497. Up to 4503 conditions per place. [2024-06-04 15:02:01,588 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 264 selfloop transitions, 111 changer transitions 0/378 dead transitions. [2024-06-04 15:02:01,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 378 transitions, 6542 flow [2024-06-04 15:02:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:02:01,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:02:01,590 INFO L175 Difference]: Start difference. First operand has 220 places, 329 transitions, 5034 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:02:01,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 378 transitions, 6542 flow [2024-06-04 15:02:02,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 378 transitions, 6242 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:02,204 INFO L231 Difference]: Finished difference. Result has 222 places, 333 transitions, 5167 flow [2024-06-04 15:02:02,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5167, PETRI_PLACES=222, PETRI_TRANSITIONS=333} [2024-06-04 15:02:02,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-04 15:02:02,205 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 333 transitions, 5167 flow [2024-06-04 15:02:02,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:02,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:02,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:02,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:02:02,206 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)] === [2024-06-04 15:02:02,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:02,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1382310593, now seen corresponding path program 6 times [2024-06-04 15:02:02,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874215617] [2024-06-04 15:02:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:02,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:03,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:03,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874215617] [2024-06-04 15:02:03,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874215617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:03,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:03,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:02:03,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197147450] [2024-06-04 15:02:03,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:03,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:02:03,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:02:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:02:03,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:03,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 333 transitions, 5167 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:03,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:03,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:03,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:04,472 INFO L124 PetriNetUnfolderBase]: 3907/5918 cut-off events. [2024-06-04 15:02:04,472 INFO L125 PetriNetUnfolderBase]: For 446371/446379 co-relation queries the response was YES. [2024-06-04 15:02:04,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51612 conditions, 5918 events. 3907/5918 cut-off events. For 446371/446379 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31916 event pairs, 803 based on Foata normal form. 14/5931 useless extension candidates. Maximal degree in co-relation 51507. Up to 5245 conditions per place. [2024-06-04 15:02:04,651 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 273 selfloop transitions, 96 changer transitions 0/372 dead transitions. [2024-06-04 15:02:04,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 372 transitions, 6441 flow [2024-06-04 15:02:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 15:02:04,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-04 15:02:04,652 INFO L175 Difference]: Start difference. First operand has 222 places, 333 transitions, 5167 flow. Second operand 9 states and 161 transitions. [2024-06-04 15:02:04,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 372 transitions, 6441 flow [2024-06-04 15:02:05,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 372 transitions, 6220 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 15:02:05,223 INFO L231 Difference]: Finished difference. Result has 226 places, 336 transitions, 5282 flow [2024-06-04 15:02:05,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4946, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5282, PETRI_PLACES=226, PETRI_TRANSITIONS=336} [2024-06-04 15:02:05,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-04 15:02:05,224 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 336 transitions, 5282 flow [2024-06-04 15:02:05,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:05,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:05,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:05,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:02:05,225 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:05,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash 388691863, now seen corresponding path program 7 times [2024-06-04 15:02:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:05,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532824859] [2024-06-04 15:02:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:05,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:06,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532824859] [2024-06-04 15:02:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532824859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:06,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:06,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:02:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275839505] [2024-06-04 15:02:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:06,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:02:06,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:02:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:02:06,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:06,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 336 transitions, 5282 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:06,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:06,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:06,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:07,605 INFO L124 PetriNetUnfolderBase]: 4020/6089 cut-off events. [2024-06-04 15:02:07,605 INFO L125 PetriNetUnfolderBase]: For 472282/472290 co-relation queries the response was YES. [2024-06-04 15:02:07,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54064 conditions, 6089 events. 4020/6089 cut-off events. For 472282/472290 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 32993 event pairs, 841 based on Foata normal form. 14/6102 useless extension candidates. Maximal degree in co-relation 53957. Up to 5036 conditions per place. [2024-06-04 15:02:07,673 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 279 selfloop transitions, 101 changer transitions 0/383 dead transitions. [2024-06-04 15:02:07,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 383 transitions, 6810 flow [2024-06-04 15:02:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:02:07,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-04 15:02:07,681 INFO L175 Difference]: Start difference. First operand has 226 places, 336 transitions, 5282 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:02:07,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 383 transitions, 6810 flow [2024-06-04 15:02:08,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 383 transitions, 6502 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:08,337 INFO L231 Difference]: Finished difference. Result has 229 places, 342 transitions, 5438 flow [2024-06-04 15:02:08,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5438, PETRI_PLACES=229, PETRI_TRANSITIONS=342} [2024-06-04 15:02:08,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-04 15:02:08,338 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 342 transitions, 5438 flow [2024-06-04 15:02:08,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:08,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:08,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:08,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:02:08,338 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:08,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:08,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2075534962, now seen corresponding path program 1 times [2024-06-04 15:02:08,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:08,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754810753] [2024-06-04 15:02:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:08,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:09,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:09,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754810753] [2024-06-04 15:02:09,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754810753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:09,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:09,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:02:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001041763] [2024-06-04 15:02:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:09,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:02:09,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:09,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:02:09,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:02:09,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:09,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 342 transitions, 5438 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:09,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:09,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:09,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:10,341 INFO L124 PetriNetUnfolderBase]: 4028/6101 cut-off events. [2024-06-04 15:02:10,341 INFO L125 PetriNetUnfolderBase]: For 488640/488652 co-relation queries the response was YES. [2024-06-04 15:02:10,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54535 conditions, 6101 events. 4028/6101 cut-off events. For 488640/488652 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33188 event pairs, 919 based on Foata normal form. 20/6120 useless extension candidates. Maximal degree in co-relation 54426. Up to 5917 conditions per place. [2024-06-04 15:02:10,411 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 305 selfloop transitions, 66 changer transitions 0/374 dead transitions. [2024-06-04 15:02:10,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 374 transitions, 6613 flow [2024-06-04 15:02:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 15:02:10,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:02:10,413 INFO L175 Difference]: Start difference. First operand has 229 places, 342 transitions, 5438 flow. Second operand 7 states and 119 transitions. [2024-06-04 15:02:10,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 374 transitions, 6613 flow [2024-06-04 15:02:11,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 374 transitions, 6256 flow, removed 110 selfloop flow, removed 5 redundant places. [2024-06-04 15:02:11,112 INFO L231 Difference]: Finished difference. Result has 231 places, 352 transitions, 5495 flow [2024-06-04 15:02:11,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5495, PETRI_PLACES=231, PETRI_TRANSITIONS=352} [2024-06-04 15:02:11,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-04 15:02:11,113 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 352 transitions, 5495 flow [2024-06-04 15:02:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:11,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:11,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:11,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:02:11,114 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:11,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2075833492, now seen corresponding path program 2 times [2024-06-04 15:02:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834027527] [2024-06-04 15:02:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:11,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:11,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834027527] [2024-06-04 15:02:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834027527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:11,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:02:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368793006] [2024-06-04 15:02:11,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:11,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:02:11,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:02:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:02:11,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:11,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 352 transitions, 5495 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:11,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:11,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:11,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:13,084 INFO L124 PetriNetUnfolderBase]: 4032/6107 cut-off events. [2024-06-04 15:02:13,084 INFO L125 PetriNetUnfolderBase]: For 486108/486116 co-relation queries the response was YES. [2024-06-04 15:02:13,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54003 conditions, 6107 events. 4032/6107 cut-off events. For 486108/486116 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33166 event pairs, 884 based on Foata normal form. 12/6118 useless extension candidates. Maximal degree in co-relation 53892. Up to 5922 conditions per place. [2024-06-04 15:02:13,154 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 303 selfloop transitions, 69 changer transitions 0/375 dead transitions. [2024-06-04 15:02:13,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 375 transitions, 6537 flow [2024-06-04 15:02:13,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 15:02:13,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-04 15:02:13,155 INFO L175 Difference]: Start difference. First operand has 231 places, 352 transitions, 5495 flow. Second operand 7 states and 115 transitions. [2024-06-04 15:02:13,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 375 transitions, 6537 flow [2024-06-04 15:02:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 375 transitions, 6356 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-04 15:02:14,114 INFO L231 Difference]: Finished difference. Result has 234 places, 357 transitions, 5596 flow [2024-06-04 15:02:14,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5596, PETRI_PLACES=234, PETRI_TRANSITIONS=357} [2024-06-04 15:02:14,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 15:02:14,114 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 357 transitions, 5596 flow [2024-06-04 15:02:14,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:14,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:14,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:14,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:02:14,115 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:14,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1106080986, now seen corresponding path program 1 times [2024-06-04 15:02:14,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:14,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745326937] [2024-06-04 15:02:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:14,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:14,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745326937] [2024-06-04 15:02:14,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745326937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:14,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:14,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:02:14,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260350970] [2024-06-04 15:02:14,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:14,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:02:14,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:02:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:02:14,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:14,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 357 transitions, 5596 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:14,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:14,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:14,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:16,192 INFO L124 PetriNetUnfolderBase]: 4037/6112 cut-off events. [2024-06-04 15:02:16,193 INFO L125 PetriNetUnfolderBase]: For 496582/496590 co-relation queries the response was YES. [2024-06-04 15:02:16,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54290 conditions, 6112 events. 4037/6112 cut-off events. For 496582/496590 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33141 event pairs, 928 based on Foata normal form. 9/6120 useless extension candidates. Maximal degree in co-relation 54178. Up to 6043 conditions per place. [2024-06-04 15:02:16,255 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 350 selfloop transitions, 29 changer transitions 0/382 dead transitions. [2024-06-04 15:02:16,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 382 transitions, 6608 flow [2024-06-04 15:02:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 15:02:16,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:02:16,256 INFO L175 Difference]: Start difference. First operand has 234 places, 357 transitions, 5596 flow. Second operand 7 states and 112 transitions. [2024-06-04 15:02:16,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 382 transitions, 6608 flow [2024-06-04 15:02:16,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 382 transitions, 6462 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 15:02:16,931 INFO L231 Difference]: Finished difference. Result has 238 places, 366 transitions, 5632 flow [2024-06-04 15:02:16,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5632, PETRI_PLACES=238, PETRI_TRANSITIONS=366} [2024-06-04 15:02:16,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-04 15:02:16,932 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 366 transitions, 5632 flow [2024-06-04 15:02:16,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:16,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:16,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:16,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:02:16,933 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)] === [2024-06-04 15:02:16,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:16,933 INFO L85 PathProgramCache]: Analyzing trace with hash 60445009, now seen corresponding path program 2 times [2024-06-04 15:02:16,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:16,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945950883] [2024-06-04 15:02:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:16,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:17,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:17,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945950883] [2024-06-04 15:02:17,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945950883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:17,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:17,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:17,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518696987] [2024-06-04 15:02:17,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:17,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:17,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:17,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:17,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 366 transitions, 5632 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:17,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:17,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:17,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:19,052 INFO L124 PetriNetUnfolderBase]: 4281/6508 cut-off events. [2024-06-04 15:02:19,053 INFO L125 PetriNetUnfolderBase]: For 610769/610785 co-relation queries the response was YES. [2024-06-04 15:02:19,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59785 conditions, 6508 events. 4281/6508 cut-off events. For 610769/610785 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35935 event pairs, 776 based on Foata normal form. 37/6544 useless extension candidates. Maximal degree in co-relation 59671. Up to 3653 conditions per place. [2024-06-04 15:02:19,132 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 208 changer transitions 0/413 dead transitions. [2024-06-04 15:02:19,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 413 transitions, 7260 flow [2024-06-04 15:02:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:19,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:02:19,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-04 15:02:19,133 INFO L175 Difference]: Start difference. First operand has 238 places, 366 transitions, 5632 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:02:19,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 413 transitions, 7260 flow [2024-06-04 15:02:19,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 413 transitions, 7205 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-04 15:02:19,874 INFO L231 Difference]: Finished difference. Result has 245 places, 370 transitions, 6220 flow [2024-06-04 15:02:19,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6220, PETRI_PLACES=245, PETRI_TRANSITIONS=370} [2024-06-04 15:02:19,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-04 15:02:19,875 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 370 transitions, 6220 flow [2024-06-04 15:02:19,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:19,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:19,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:19,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:02:19,876 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)] === [2024-06-04 15:02:19,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1142798431, now seen corresponding path program 8 times [2024-06-04 15:02:19,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:19,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443351881] [2024-06-04 15:02:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:19,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:20,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443351881] [2024-06-04 15:02:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443351881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:20,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:20,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:02:20,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100871273] [2024-06-04 15:02:20,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:20,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:02:20,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:20,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:02:20,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:02:20,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:20,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 370 transitions, 6220 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:20,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:20,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:20,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:22,502 INFO L124 PetriNetUnfolderBase]: 4619/7018 cut-off events. [2024-06-04 15:02:22,503 INFO L125 PetriNetUnfolderBase]: For 644370/644378 co-relation queries the response was YES. [2024-06-04 15:02:22,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66395 conditions, 7018 events. 4619/7018 cut-off events. For 644370/644378 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 39534 event pairs, 988 based on Foata normal form. 14/7031 useless extension candidates. Maximal degree in co-relation 66278. Up to 6484 conditions per place. [2024-06-04 15:02:22,591 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 351 selfloop transitions, 126 changer transitions 0/480 dead transitions. [2024-06-04 15:02:22,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 480 transitions, 8967 flow [2024-06-04 15:02:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:02:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:02:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-04 15:02:22,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:02:22,600 INFO L175 Difference]: Start difference. First operand has 245 places, 370 transitions, 6220 flow. Second operand 10 states and 175 transitions. [2024-06-04 15:02:22,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 480 transitions, 8967 flow [2024-06-04 15:02:23,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 480 transitions, 8596 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 15:02:23,713 INFO L231 Difference]: Finished difference. Result has 254 places, 430 transitions, 7546 flow [2024-06-04 15:02:23,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7546, PETRI_PLACES=254, PETRI_TRANSITIONS=430} [2024-06-04 15:02:23,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-04 15:02:23,714 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 430 transitions, 7546 flow [2024-06-04 15:02:23,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:23,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:23,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:02:23,715 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)] === [2024-06-04 15:02:23,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash -16404777, now seen corresponding path program 3 times [2024-06-04 15:02:23,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:23,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445869781] [2024-06-04 15:02:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:23,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:24,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:24,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445869781] [2024-06-04 15:02:24,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445869781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:24,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:24,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332021279] [2024-06-04 15:02:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:24,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:24,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 430 transitions, 7546 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:24,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:24,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:24,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:26,142 INFO L124 PetriNetUnfolderBase]: 4755/7244 cut-off events. [2024-06-04 15:02:26,143 INFO L125 PetriNetUnfolderBase]: For 725455/725467 co-relation queries the response was YES. [2024-06-04 15:02:26,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69502 conditions, 7244 events. 4755/7244 cut-off events. For 725455/725467 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41262 event pairs, 963 based on Foata normal form. 48/7291 useless extension candidates. Maximal degree in co-relation 69379. Up to 5852 conditions per place. [2024-06-04 15:02:26,234 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 260 selfloop transitions, 207 changer transitions 0/470 dead transitions. [2024-06-04 15:02:26,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 470 transitions, 8988 flow [2024-06-04 15:02:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:02:26,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:02:26,235 INFO L175 Difference]: Start difference. First operand has 254 places, 430 transitions, 7546 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:02:26,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 470 transitions, 8988 flow [2024-06-04 15:02:27,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 470 transitions, 8785 flow, removed 97 selfloop flow, removed 2 redundant places. [2024-06-04 15:02:27,726 INFO L231 Difference]: Finished difference. Result has 261 places, 433 transitions, 7917 flow [2024-06-04 15:02:27,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7343, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7917, PETRI_PLACES=261, PETRI_TRANSITIONS=433} [2024-06-04 15:02:27,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-04 15:02:27,726 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 433 transitions, 7917 flow [2024-06-04 15:02:27,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:27,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:27,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:02:27,727 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)] === [2024-06-04 15:02:27,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash 60185539, now seen corresponding path program 4 times [2024-06-04 15:02:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374818135] [2024-06-04 15:02:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:28,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:28,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374818135] [2024-06-04 15:02:28,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374818135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:28,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:28,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389412870] [2024-06-04 15:02:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:28,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:28,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:28,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 433 transitions, 7917 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:28,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:28,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:28,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:30,515 INFO L124 PetriNetUnfolderBase]: 4935/7539 cut-off events. [2024-06-04 15:02:30,515 INFO L125 PetriNetUnfolderBase]: For 780931/780943 co-relation queries the response was YES. [2024-06-04 15:02:30,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74090 conditions, 7539 events. 4935/7539 cut-off events. For 780931/780943 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43432 event pairs, 1007 based on Foata normal form. 36/7574 useless extension candidates. Maximal degree in co-relation 73965. Up to 5668 conditions per place. [2024-06-04 15:02:30,616 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 214 changer transitions 0/479 dead transitions. [2024-06-04 15:02:30,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 479 transitions, 9701 flow [2024-06-04 15:02:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 15:02:30,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 15:02:30,618 INFO L175 Difference]: Start difference. First operand has 261 places, 433 transitions, 7917 flow. Second operand 9 states and 171 transitions. [2024-06-04 15:02:30,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 479 transitions, 9701 flow [2024-06-04 15:02:32,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 479 transitions, 9183 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:32,225 INFO L231 Difference]: Finished difference. Result has 263 places, 437 transitions, 8071 flow [2024-06-04 15:02:32,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7399, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8071, PETRI_PLACES=263, PETRI_TRANSITIONS=437} [2024-06-04 15:02:32,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-04 15:02:32,226 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 437 transitions, 8071 flow [2024-06-04 15:02:32,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:32,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:32,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:32,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:02:32,226 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)] === [2024-06-04 15:02:32,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1322962239, now seen corresponding path program 9 times [2024-06-04 15:02:32,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:32,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953586364] [2024-06-04 15:02:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:32,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:33,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:33,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953586364] [2024-06-04 15:02:33,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953586364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:33,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:33,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:02:33,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710251235] [2024-06-04 15:02:33,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:33,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:02:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:33,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:02:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:02:33,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:33,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 437 transitions, 8071 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:33,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:33,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:33,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:35,095 INFO L124 PetriNetUnfolderBase]: 4963/7583 cut-off events. [2024-06-04 15:02:35,096 INFO L125 PetriNetUnfolderBase]: For 762094/762106 co-relation queries the response was YES. [2024-06-04 15:02:35,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74140 conditions, 7583 events. 4963/7583 cut-off events. For 762094/762106 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43665 event pairs, 1052 based on Foata normal form. 18/7600 useless extension candidates. Maximal degree in co-relation 74014. Up to 6352 conditions per place. [2024-06-04 15:02:35,191 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 287 selfloop transitions, 185 changer transitions 0/475 dead transitions. [2024-06-04 15:02:35,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 475 transitions, 9749 flow [2024-06-04 15:02:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:02:35,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 15:02:35,193 INFO L175 Difference]: Start difference. First operand has 263 places, 437 transitions, 8071 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:02:35,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 475 transitions, 9749 flow [2024-06-04 15:02:36,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 475 transitions, 9358 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-04 15:02:36,515 INFO L231 Difference]: Finished difference. Result has 267 places, 440 transitions, 8218 flow [2024-06-04 15:02:36,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7680, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8218, PETRI_PLACES=267, PETRI_TRANSITIONS=440} [2024-06-04 15:02:36,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-04 15:02:36,517 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 440 transitions, 8218 flow [2024-06-04 15:02:36,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:36,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:36,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:36,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:02:36,518 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:36,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:36,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1747383, now seen corresponding path program 10 times [2024-06-04 15:02:36,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:36,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117920667] [2024-06-04 15:02:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:36,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:37,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:37,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117920667] [2024-06-04 15:02:37,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117920667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:37,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:37,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:02:37,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070601249] [2024-06-04 15:02:37,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:37,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:02:37,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:02:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:02:37,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:37,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 440 transitions, 8218 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:37,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:37,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:37,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:39,383 INFO L124 PetriNetUnfolderBase]: 5246/8024 cut-off events. [2024-06-04 15:02:39,383 INFO L125 PetriNetUnfolderBase]: For 869606/869618 co-relation queries the response was YES. [2024-06-04 15:02:39,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81501 conditions, 8024 events. 5246/8024 cut-off events. For 869606/869618 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 46946 event pairs, 1154 based on Foata normal form. 18/8041 useless extension candidates. Maximal degree in co-relation 81373. Up to 6127 conditions per place. [2024-06-04 15:02:39,493 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 295 selfloop transitions, 191 changer transitions 0/489 dead transitions. [2024-06-04 15:02:39,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 489 transitions, 10416 flow [2024-06-04 15:02:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 15:02:39,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 15:02:39,500 INFO L175 Difference]: Start difference. First operand has 267 places, 440 transitions, 8218 flow. Second operand 9 states and 171 transitions. [2024-06-04 15:02:39,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 489 transitions, 10416 flow [2024-06-04 15:02:41,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 489 transitions, 9936 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-04 15:02:41,019 INFO L231 Difference]: Finished difference. Result has 271 places, 447 transitions, 8470 flow [2024-06-04 15:02:41,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7738, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8470, PETRI_PLACES=271, PETRI_TRANSITIONS=447} [2024-06-04 15:02:41,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-04 15:02:41,020 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 447 transitions, 8470 flow [2024-06-04 15:02:41,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:02:41,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:41,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:41,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:02:41,021 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:41,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:41,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1328676531, now seen corresponding path program 5 times [2024-06-04 15:02:41,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:41,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911574296] [2024-06-04 15:02:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:41,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:41,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911574296] [2024-06-04 15:02:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911574296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:41,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:41,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:41,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125202909] [2024-06-04 15:02:41,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:41,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:41,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:41,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:41,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 447 transitions, 8470 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:41,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:41,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:41,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:43,726 INFO L124 PetriNetUnfolderBase]: 5190/7944 cut-off events. [2024-06-04 15:02:43,727 INFO L125 PetriNetUnfolderBase]: For 886399/886411 co-relation queries the response was YES. [2024-06-04 15:02:43,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79352 conditions, 7944 events. 5190/7944 cut-off events. For 886399/886411 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46339 event pairs, 1154 based on Foata normal form. 48/7991 useless extension candidates. Maximal degree in co-relation 79222. Up to 6535 conditions per place. [2024-06-04 15:02:43,821 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 301 selfloop transitions, 183 changer transitions 0/487 dead transitions. [2024-06-04 15:02:43,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 487 transitions, 10059 flow [2024-06-04 15:02:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:02:43,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-04 15:02:43,823 INFO L175 Difference]: Start difference. First operand has 271 places, 447 transitions, 8470 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:02:43,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 487 transitions, 10059 flow [2024-06-04 15:02:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 487 transitions, 9564 flow, removed 113 selfloop flow, removed 6 redundant places. [2024-06-04 15:02:45,224 INFO L231 Difference]: Finished difference. Result has 274 places, 449 transitions, 8474 flow [2024-06-04 15:02:45,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7993, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8474, PETRI_PLACES=274, PETRI_TRANSITIONS=449} [2024-06-04 15:02:45,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-04 15:02:45,225 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 449 transitions, 8474 flow [2024-06-04 15:02:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:45,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:45,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:45,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:02:45,226 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:45,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1328683971, now seen corresponding path program 6 times [2024-06-04 15:02:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:45,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001612036] [2024-06-04 15:02:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:45,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001612036] [2024-06-04 15:02:45,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001612036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:45,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:45,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:45,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621345609] [2024-06-04 15:02:45,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:45,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:46,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:46,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 449 transitions, 8474 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:47,799 INFO L124 PetriNetUnfolderBase]: 5210/7988 cut-off events. [2024-06-04 15:02:47,799 INFO L125 PetriNetUnfolderBase]: For 867064/867076 co-relation queries the response was YES. [2024-06-04 15:02:47,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78731 conditions, 7988 events. 5210/7988 cut-off events. For 867064/867076 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46813 event pairs, 1111 based on Foata normal form. 36/8023 useless extension candidates. Maximal degree in co-relation 78600. Up to 6063 conditions per place. [2024-06-04 15:02:47,909 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 190 changer transitions 0/494 dead transitions. [2024-06-04 15:02:47,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 494 transitions, 10340 flow [2024-06-04 15:02:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:02:47,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-04 15:02:47,910 INFO L175 Difference]: Start difference. First operand has 274 places, 449 transitions, 8474 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:02:47,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 494 transitions, 10340 flow [2024-06-04 15:02:49,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 494 transitions, 9868 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:49,419 INFO L231 Difference]: Finished difference. Result has 276 places, 451 transitions, 8517 flow [2024-06-04 15:02:49,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8010, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8517, PETRI_PLACES=276, PETRI_TRANSITIONS=451} [2024-06-04 15:02:49,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-04 15:02:49,420 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 451 transitions, 8517 flow [2024-06-04 15:02:49,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:49,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:49,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:49,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:02:49,421 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:49,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2032331226, now seen corresponding path program 2 times [2024-06-04 15:02:49,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:49,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661824191] [2024-06-04 15:02:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:49,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:50,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:50,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661824191] [2024-06-04 15:02:50,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661824191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:50,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:50,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:02:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137658492] [2024-06-04 15:02:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:50,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:02:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:50,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:02:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:02:50,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:50,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 451 transitions, 8517 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:50,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:50,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:50,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:52,012 INFO L124 PetriNetUnfolderBase]: 5215/7993 cut-off events. [2024-06-04 15:02:52,013 INFO L125 PetriNetUnfolderBase]: For 826153/826161 co-relation queries the response was YES. [2024-06-04 15:02:52,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77948 conditions, 7993 events. 5215/7993 cut-off events. For 826153/826161 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46961 event pairs, 1316 based on Foata normal form. 9/8001 useless extension candidates. Maximal degree in co-relation 77816. Up to 7906 conditions per place. [2024-06-04 15:02:52,131 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 426 selfloop transitions, 35 changer transitions 0/464 dead transitions. [2024-06-04 15:02:52,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 464 transitions, 9633 flow [2024-06-04 15:02:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-04 15:02:52,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-04 15:02:52,132 INFO L175 Difference]: Start difference. First operand has 276 places, 451 transitions, 8517 flow. Second operand 7 states and 106 transitions. [2024-06-04 15:02:52,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 464 transitions, 9633 flow [2024-06-04 15:02:53,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 464 transitions, 8971 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-04 15:02:53,815 INFO L231 Difference]: Finished difference. Result has 275 places, 454 transitions, 7973 flow [2024-06-04 15:02:53,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7855, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7973, PETRI_PLACES=275, PETRI_TRANSITIONS=454} [2024-06-04 15:02:53,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-04 15:02:53,816 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 454 transitions, 7973 flow [2024-06-04 15:02:53,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:53,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:53,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:53,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:02:53,816 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:53,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1864454682, now seen corresponding path program 3 times [2024-06-04 15:02:53,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:53,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504461142] [2024-06-04 15:02:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:53,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:54,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:54,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504461142] [2024-06-04 15:02:54,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504461142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:54,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:54,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:02:54,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052620944] [2024-06-04 15:02:54,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:54,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:02:54,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:54,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:02:54,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:02:54,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:54,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 454 transitions, 7973 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:54,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:54,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:54,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:56,299 INFO L124 PetriNetUnfolderBase]: 5212/7989 cut-off events. [2024-06-04 15:02:56,299 INFO L125 PetriNetUnfolderBase]: For 817320/817328 co-relation queries the response was YES. [2024-06-04 15:02:56,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75325 conditions, 7989 events. 5212/7989 cut-off events. For 817320/817328 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46936 event pairs, 1316 based on Foata normal form. 9/7997 useless extension candidates. Maximal degree in co-relation 75193. Up to 7903 conditions per place. [2024-06-04 15:02:56,408 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 38 changer transitions 0/463 dead transitions. [2024-06-04 15:02:56,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 463 transitions, 8919 flow [2024-06-04 15:02:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:02:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:02:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-04 15:02:56,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-04 15:02:56,409 INFO L175 Difference]: Start difference. First operand has 275 places, 454 transitions, 7973 flow. Second operand 7 states and 104 transitions. [2024-06-04 15:02:56,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 463 transitions, 8919 flow [2024-06-04 15:02:57,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 463 transitions, 8805 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 15:02:57,835 INFO L231 Difference]: Finished difference. Result has 278 places, 454 transitions, 7941 flow [2024-06-04 15:02:57,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7859, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7941, PETRI_PLACES=278, PETRI_TRANSITIONS=454} [2024-06-04 15:02:57,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-04 15:02:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 454 transitions, 7941 flow [2024-06-04 15:02:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:57,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:57,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:57,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:02:57,837 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:57,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash -150689580, now seen corresponding path program 3 times [2024-06-04 15:02:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:57,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456291699] [2024-06-04 15:02:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:58,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:58,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456291699] [2024-06-04 15:02:58,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456291699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:58,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:58,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:02:58,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125078563] [2024-06-04 15:02:58,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:58,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:02:58,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:58,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:02:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:02:58,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:58,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 454 transitions, 7941 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:02:58,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:58,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:58,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:00,339 INFO L124 PetriNetUnfolderBase]: 5206/7983 cut-off events. [2024-06-04 15:03:00,340 INFO L125 PetriNetUnfolderBase]: For 837345/837357 co-relation queries the response was YES. [2024-06-04 15:03:00,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75399 conditions, 7983 events. 5206/7983 cut-off events. For 837345/837357 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46805 event pairs, 1257 based on Foata normal form. 14/7996 useless extension candidates. Maximal degree in co-relation 75266. Up to 7747 conditions per place. [2024-06-04 15:03:00,467 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 370 selfloop transitions, 91 changer transitions 0/464 dead transitions. [2024-06-04 15:03:00,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 464 transitions, 8896 flow [2024-06-04 15:03:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-04 15:03:00,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-04 15:03:00,469 INFO L175 Difference]: Start difference. First operand has 278 places, 454 transitions, 7941 flow. Second operand 7 states and 108 transitions. [2024-06-04 15:03:00,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 464 transitions, 8896 flow [2024-06-04 15:03:02,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 464 transitions, 8798 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 15:03:02,213 INFO L231 Difference]: Finished difference. Result has 280 places, 454 transitions, 8033 flow [2024-06-04 15:03:02,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8033, PETRI_PLACES=280, PETRI_TRANSITIONS=454} [2024-06-04 15:03:02,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-04 15:03:02,214 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 454 transitions, 8033 flow [2024-06-04 15:03:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:03:02,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:02,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:02,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:03:02,215 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)] === [2024-06-04 15:03:02,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash 974016169, now seen corresponding path program 11 times [2024-06-04 15:03:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:02,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069992291] [2024-06-04 15:03:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:02,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:03,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:03,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069992291] [2024-06-04 15:03:03,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069992291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:03,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:03,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:03:03,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526212793] [2024-06-04 15:03:03,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:03,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:03:03,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:03:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:03:03,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:03,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 454 transitions, 8033 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:03:03,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:03,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:03,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:05,303 INFO L124 PetriNetUnfolderBase]: 5458/8368 cut-off events. [2024-06-04 15:03:05,303 INFO L125 PetriNetUnfolderBase]: For 899100/899108 co-relation queries the response was YES. [2024-06-04 15:03:05,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79216 conditions, 8368 events. 5458/8368 cut-off events. For 899100/899108 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 49485 event pairs, 1006 based on Foata normal form. 14/8381 useless extension candidates. Maximal degree in co-relation 79082. Up to 7576 conditions per place. [2024-06-04 15:03:05,416 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 377 selfloop transitions, 156 changer transitions 0/536 dead transitions. [2024-06-04 15:03:05,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 536 transitions, 10442 flow [2024-06-04 15:03:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:03:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:03:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-04 15:03:05,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-04 15:03:05,418 INFO L175 Difference]: Start difference. First operand has 280 places, 454 transitions, 8033 flow. Second operand 10 states and 172 transitions. [2024-06-04 15:03:05,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 536 transitions, 10442 flow [2024-06-04 15:03:07,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 536 transitions, 10174 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 15:03:07,366 INFO L231 Difference]: Finished difference. Result has 286 places, 493 transitions, 9051 flow [2024-06-04 15:03:07,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9051, PETRI_PLACES=286, PETRI_TRANSITIONS=493} [2024-06-04 15:03:07,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-04 15:03:07,367 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 493 transitions, 9051 flow [2024-06-04 15:03:07,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:03:07,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:07,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:03:07,368 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:03:07,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2041817400, now seen corresponding path program 1 times [2024-06-04 15:03:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:07,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019283557] [2024-06-04 15:03:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:08,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:08,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019283557] [2024-06-04 15:03:08,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019283557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:08,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:08,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958817027] [2024-06-04 15:03:08,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:08,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:08,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:08,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:08,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:03:08,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 493 transitions, 9051 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:08,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:08,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:03:08,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:10,139 INFO L124 PetriNetUnfolderBase]: 5306/8240 cut-off events. [2024-06-04 15:03:10,140 INFO L125 PetriNetUnfolderBase]: For 855187/855187 co-relation queries the response was YES. [2024-06-04 15:03:10,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78345 conditions, 8240 events. 5306/8240 cut-off events. For 855187/855187 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 49942 event pairs, 1419 based on Foata normal form. 4/8239 useless extension candidates. Maximal degree in co-relation 78207. Up to 8001 conditions per place. [2024-06-04 15:03:10,520 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 29 changer transitions 0/519 dead transitions. [2024-06-04 15:03:10,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 519 transitions, 10467 flow [2024-06-04 15:03:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 15:03:10,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-04 15:03:10,521 INFO L175 Difference]: Start difference. First operand has 286 places, 493 transitions, 9051 flow. Second operand 7 states and 120 transitions. [2024-06-04 15:03:10,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 519 transitions, 10467 flow [2024-06-04 15:03:12,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 519 transitions, 10140 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-04 15:03:12,325 INFO L231 Difference]: Finished difference. Result has 289 places, 503 transitions, 8986 flow [2024-06-04 15:03:12,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8724, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8986, PETRI_PLACES=289, PETRI_TRANSITIONS=503} [2024-06-04 15:03:12,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-04 15:03:12,326 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 503 transitions, 8986 flow [2024-06-04 15:03:12,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:12,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:12,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:12,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:03:12,326 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:03:12,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash 764018244, now seen corresponding path program 2 times [2024-06-04 15:03:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:12,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097426168] [2024-06-04 15:03:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:13,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:13,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097426168] [2024-06-04 15:03:13,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097426168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:13,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:13,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:13,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962534416] [2024-06-04 15:03:13,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:13,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:13,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:13,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:13,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:13,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:03:13,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 503 transitions, 8986 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:13,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:13,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:03:13,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:14,896 INFO L124 PetriNetUnfolderBase]: 5316/8255 cut-off events. [2024-06-04 15:03:14,896 INFO L125 PetriNetUnfolderBase]: For 868516/868516 co-relation queries the response was YES. [2024-06-04 15:03:14,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78593 conditions, 8255 events. 5316/8255 cut-off events. For 868516/868516 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 50009 event pairs, 1419 based on Foata normal form. 3/8251 useless extension candidates. Maximal degree in co-relation 78453. Up to 8087 conditions per place. [2024-06-04 15:03:15,014 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 491 selfloop transitions, 17 changer transitions 0/516 dead transitions. [2024-06-04 15:03:15,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 516 transitions, 10102 flow [2024-06-04 15:03:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-04 15:03:15,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-04 15:03:15,016 INFO L175 Difference]: Start difference. First operand has 289 places, 503 transitions, 8986 flow. Second operand 7 states and 108 transitions. [2024-06-04 15:03:15,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 516 transitions, 10102 flow [2024-06-04 15:03:16,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 516 transitions, 9984 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-04 15:03:16,819 INFO L231 Difference]: Finished difference. Result has 294 places, 506 transitions, 8983 flow [2024-06-04 15:03:16,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8868, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8983, PETRI_PLACES=294, PETRI_TRANSITIONS=506} [2024-06-04 15:03:16,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-04 15:03:16,820 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 506 transitions, 8983 flow [2024-06-04 15:03:16,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:16,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:16,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:16,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:03:16,820 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:03:16,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1864685880, now seen corresponding path program 3 times [2024-06-04 15:03:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:16,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019865135] [2024-06-04 15:03:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:16,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:17,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:17,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019865135] [2024-06-04 15:03:17,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019865135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:17,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:17,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:17,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168951839] [2024-06-04 15:03:17,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:17,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:17,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:17,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:03:17,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 506 transitions, 8983 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:17,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:17,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:03:17,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:19,366 INFO L124 PetriNetUnfolderBase]: 5314/8251 cut-off events. [2024-06-04 15:03:19,367 INFO L125 PetriNetUnfolderBase]: For 882979/882979 co-relation queries the response was YES. [2024-06-04 15:03:19,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78626 conditions, 8251 events. 5314/8251 cut-off events. For 882979/882979 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 50030 event pairs, 1418 based on Foata normal form. 2/8246 useless extension candidates. Maximal degree in co-relation 78483. Up to 8076 conditions per place. [2024-06-04 15:03:19,473 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 490 selfloop transitions, 22 changer transitions 0/520 dead transitions. [2024-06-04 15:03:19,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 520 transitions, 10117 flow [2024-06-04 15:03:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-04 15:03:19,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-04 15:03:19,475 INFO L175 Difference]: Start difference. First operand has 294 places, 506 transitions, 8983 flow. Second operand 7 states and 111 transitions. [2024-06-04 15:03:19,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 520 transitions, 10117 flow [2024-06-04 15:03:21,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 520 transitions, 10025 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 15:03:21,183 INFO L231 Difference]: Finished difference. Result has 296 places, 509 transitions, 9021 flow [2024-06-04 15:03:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8891, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9021, PETRI_PLACES=296, PETRI_TRANSITIONS=509} [2024-06-04 15:03:21,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-04 15:03:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 509 transitions, 9021 flow [2024-06-04 15:03:21,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:21,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:21,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:21,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:03:21,184 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)] === [2024-06-04 15:03:21,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:21,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2082451090, now seen corresponding path program 1 times [2024-06-04 15:03:21,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:21,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267623860] [2024-06-04 15:03:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:22,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:22,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267623860] [2024-06-04 15:03:22,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267623860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:22,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:22,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:03:22,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870949590] [2024-06-04 15:03:22,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:22,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:03:22,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:22,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:03:22,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:03:22,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:22,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 509 transitions, 9021 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:22,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:22,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:22,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:24,868 INFO L124 PetriNetUnfolderBase]: 5578/8555 cut-off events. [2024-06-04 15:03:24,869 INFO L125 PetriNetUnfolderBase]: For 1042032/1042040 co-relation queries the response was YES. [2024-06-04 15:03:24,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83560 conditions, 8555 events. 5578/8555 cut-off events. For 1042032/1042040 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 51063 event pairs, 1221 based on Foata normal form. 26/8580 useless extension candidates. Maximal degree in co-relation 83417. Up to 7793 conditions per place. [2024-06-04 15:03:24,977 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 418 selfloop transitions, 137 changer transitions 0/558 dead transitions. [2024-06-04 15:03:24,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 558 transitions, 10722 flow [2024-06-04 15:03:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:03:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:03:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-04 15:03:24,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-04 15:03:24,978 INFO L175 Difference]: Start difference. First operand has 296 places, 509 transitions, 9021 flow. Second operand 11 states and 182 transitions. [2024-06-04 15:03:24,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 558 transitions, 10722 flow [2024-06-04 15:03:26,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 558 transitions, 10618 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:03:26,782 INFO L231 Difference]: Finished difference. Result has 302 places, 511 transitions, 9329 flow [2024-06-04 15:03:26,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8917, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9329, PETRI_PLACES=302, PETRI_TRANSITIONS=511} [2024-06-04 15:03:26,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-04 15:03:26,782 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 511 transitions, 9329 flow [2024-06-04 15:03:26,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:26,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:26,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:26,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:03:26,783 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:03:26,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash -405199562, now seen corresponding path program 2 times [2024-06-04 15:03:26,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:26,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095535188] [2024-06-04 15:03:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:28,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:28,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095535188] [2024-06-04 15:03:28,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095535188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:28,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:03:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393319101] [2024-06-04 15:03:28,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:28,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:03:28,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:03:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:03:28,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:28,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 511 transitions, 9329 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:28,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:28,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:28,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:30,432 INFO L124 PetriNetUnfolderBase]: 5646/8677 cut-off events. [2024-06-04 15:03:30,433 INFO L125 PetriNetUnfolderBase]: For 1074293/1074297 co-relation queries the response was YES. [2024-06-04 15:03:30,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85538 conditions, 8677 events. 5646/8677 cut-off events. For 1074293/1074297 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52155 event pairs, 1406 based on Foata normal form. 22/8698 useless extension candidates. Maximal degree in co-relation 85394. Up to 8019 conditions per place. [2024-06-04 15:03:30,546 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 431 selfloop transitions, 121 changer transitions 0/555 dead transitions. [2024-06-04 15:03:30,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 555 transitions, 10995 flow [2024-06-04 15:03:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:03:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:03:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 15:03:30,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-04 15:03:30,548 INFO L175 Difference]: Start difference. First operand has 302 places, 511 transitions, 9329 flow. Second operand 10 states and 173 transitions. [2024-06-04 15:03:30,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 555 transitions, 10995 flow [2024-06-04 15:03:32,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 555 transitions, 10617 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-04 15:03:32,531 INFO L231 Difference]: Finished difference. Result has 303 places, 513 transitions, 9332 flow [2024-06-04 15:03:32,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8951, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9332, PETRI_PLACES=303, PETRI_TRANSITIONS=513} [2024-06-04 15:03:32,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-04 15:03:32,532 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 513 transitions, 9332 flow [2024-06-04 15:03:32,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:32,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:32,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:32,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:03:32,533 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:03:32,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2024243320, now seen corresponding path program 3 times [2024-06-04 15:03:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:32,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266306522] [2024-06-04 15:03:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:32,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:33,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:33,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266306522] [2024-06-04 15:03:33,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266306522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:33,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:33,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:33,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052533411] [2024-06-04 15:03:33,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:33,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:33,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:33,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:33,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:33,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:33,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 513 transitions, 9332 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:03:33,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:33,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:33,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:35,838 INFO L124 PetriNetUnfolderBase]: 5620/8633 cut-off events. [2024-06-04 15:03:35,838 INFO L125 PetriNetUnfolderBase]: For 1065795/1065803 co-relation queries the response was YES. [2024-06-04 15:03:35,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83690 conditions, 8633 events. 5620/8633 cut-off events. For 1065795/1065803 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51725 event pairs, 1317 based on Foata normal form. 26/8658 useless extension candidates. Maximal degree in co-relation 83545. Up to 7836 conditions per place. [2024-06-04 15:03:35,954 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 140 changer transitions 0/550 dead transitions. [2024-06-04 15:03:35,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 550 transitions, 10739 flow [2024-06-04 15:03:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:03:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:03:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:03:35,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 15:03:35,956 INFO L175 Difference]: Start difference. First operand has 303 places, 513 transitions, 9332 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:03:35,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 550 transitions, 10739 flow [2024-06-04 15:03:37,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 550 transitions, 10351 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-04 15:03:37,823 INFO L231 Difference]: Finished difference. Result has 306 places, 515 transitions, 9289 flow [2024-06-04 15:03:37,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9289, PETRI_PLACES=306, PETRI_TRANSITIONS=515} [2024-06-04 15:03:37,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-04 15:03:37,823 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 515 transitions, 9289 flow [2024-06-04 15:03:37,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:03:37,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:37,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:37,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:03:37,824 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)] === [2024-06-04 15:03:37,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash -79379753, now seen corresponding path program 1 times [2024-06-04 15:03:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:37,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734786055] [2024-06-04 15:03:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:38,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:38,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734786055] [2024-06-04 15:03:38,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734786055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:38,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:38,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:38,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267696772] [2024-06-04 15:03:38,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:38,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:38,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:38,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:38,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:38,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:38,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 515 transitions, 9289 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:38,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:38,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:38,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:40,698 INFO L124 PetriNetUnfolderBase]: 5622/8638 cut-off events. [2024-06-04 15:03:40,698 INFO L125 PetriNetUnfolderBase]: For 1030584/1030588 co-relation queries the response was YES. [2024-06-04 15:03:40,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83278 conditions, 8638 events. 5622/8638 cut-off events. For 1030584/1030588 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51796 event pairs, 1444 based on Foata normal form. 6/8643 useless extension candidates. Maximal degree in co-relation 83131. Up to 8513 conditions per place. [2024-06-04 15:03:40,810 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 494 selfloop transitions, 39 changer transitions 0/536 dead transitions. [2024-06-04 15:03:40,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 536 transitions, 10632 flow [2024-06-04 15:03:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 15:03:40,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-04 15:03:40,811 INFO L175 Difference]: Start difference. First operand has 306 places, 515 transitions, 9289 flow. Second operand 7 states and 116 transitions. [2024-06-04 15:03:40,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 536 transitions, 10632 flow [2024-06-04 15:03:42,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 536 transitions, 10288 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 15:03:42,300 INFO L231 Difference]: Finished difference. Result has 306 places, 518 transitions, 9102 flow [2024-06-04 15:03:42,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8949, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9102, PETRI_PLACES=306, PETRI_TRANSITIONS=518} [2024-06-04 15:03:42,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-04 15:03:42,301 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 518 transitions, 9102 flow [2024-06-04 15:03:42,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:42,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:42,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:42,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:03:42,301 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)] === [2024-06-04 15:03:42,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash -73665833, now seen corresponding path program 2 times [2024-06-04 15:03:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:42,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560293779] [2024-06-04 15:03:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:42,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560293779] [2024-06-04 15:03:42,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560293779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:42,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:42,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:03:42,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330416892] [2024-06-04 15:03:42,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:42,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:03:42,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:03:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:03:42,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:42,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 518 transitions, 9102 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:42,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:42,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:42,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:44,882 INFO L124 PetriNetUnfolderBase]: 5627/8645 cut-off events. [2024-06-04 15:03:44,883 INFO L125 PetriNetUnfolderBase]: For 1047824/1047828 co-relation queries the response was YES. [2024-06-04 15:03:44,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82934 conditions, 8645 events. 5627/8645 cut-off events. For 1047824/1047828 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51835 event pairs, 1442 based on Foata normal form. 5/8649 useless extension candidates. Maximal degree in co-relation 82786. Up to 8561 conditions per place. [2024-06-04 15:03:45,009 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 501 selfloop transitions, 31 changer transitions 0/535 dead transitions. [2024-06-04 15:03:45,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 535 transitions, 10285 flow [2024-06-04 15:03:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:03:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:03:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 15:03:45,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-04 15:03:45,011 INFO L175 Difference]: Start difference. First operand has 306 places, 518 transitions, 9102 flow. Second operand 7 states and 109 transitions. [2024-06-04 15:03:45,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 535 transitions, 10285 flow [2024-06-04 15:03:47,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 535 transitions, 10211 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 15:03:47,108 INFO L231 Difference]: Finished difference. Result has 309 places, 521 transitions, 9175 flow [2024-06-04 15:03:47,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9030, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9175, PETRI_PLACES=309, PETRI_TRANSITIONS=521} [2024-06-04 15:03:47,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-04 15:03:47,109 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 521 transitions, 9175 flow [2024-06-04 15:03:47,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:03:47,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:47,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:47,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:03:47,110 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:03:47,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:47,110 INFO L85 PathProgramCache]: Analyzing trace with hash -294971688, now seen corresponding path program 4 times [2024-06-04 15:03:47,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:47,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460874389] [2024-06-04 15:03:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:47,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:48,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:48,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460874389] [2024-06-04 15:03:48,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460874389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:48,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:48,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:03:48,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642376365] [2024-06-04 15:03:48,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:48,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:03:48,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:03:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:03:48,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:48,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 521 transitions, 9175 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 15:03:48,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:48,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:48,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:50,726 INFO L124 PetriNetUnfolderBase]: 5695/8759 cut-off events. [2024-06-04 15:03:50,726 INFO L125 PetriNetUnfolderBase]: For 1126952/1126960 co-relation queries the response was YES. [2024-06-04 15:03:50,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84468 conditions, 8759 events. 5695/8759 cut-off events. For 1126952/1126960 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52678 event pairs, 1340 based on Foata normal form. 26/8784 useless extension candidates. Maximal degree in co-relation 84319. Up to 7701 conditions per place. [2024-06-04 15:03:50,836 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 142 changer transitions 0/560 dead transitions. [2024-06-04 15:03:50,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 560 transitions, 10874 flow [2024-06-04 15:03:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:03:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:03:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:03:50,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 15:03:50,837 INFO L175 Difference]: Start difference. First operand has 309 places, 521 transitions, 9175 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:03:50,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 560 transitions, 10874 flow [2024-06-04 15:03:52,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 560 transitions, 10800 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 15:03:52,617 INFO L231 Difference]: Finished difference. Result has 314 places, 524 transitions, 9584 flow [2024-06-04 15:03:52,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9584, PETRI_PLACES=314, PETRI_TRANSITIONS=524} [2024-06-04 15:03:52,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 15:03:52,618 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 524 transitions, 9584 flow [2024-06-04 15:03:52,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 15:03:52,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:52,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:52,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:03:52,618 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)] === [2024-06-04 15:03:52,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash -849650762, now seen corresponding path program 1 times [2024-06-04 15:03:52,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:52,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928789252] [2024-06-04 15:03:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:52,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:53,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928789252] [2024-06-04 15:03:53,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928789252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:53,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:53,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:53,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735146066] [2024-06-04 15:03:53,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:53,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:53,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:53,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:53,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:53,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:53,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 524 transitions, 9584 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:03:53,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:53,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:53,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:55,635 INFO L124 PetriNetUnfolderBase]: 5705/8779 cut-off events. [2024-06-04 15:03:55,635 INFO L125 PetriNetUnfolderBase]: For 1120343/1120347 co-relation queries the response was YES. [2024-06-04 15:03:55,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85790 conditions, 8779 events. 5705/8779 cut-off events. For 1120343/1120347 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52894 event pairs, 1447 based on Foata normal form. 6/8784 useless extension candidates. Maximal degree in co-relation 85639. Up to 8461 conditions per place. [2024-06-04 15:03:55,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 103 changer transitions 0/554 dead transitions. [2024-06-04 15:03:55,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 554 transitions, 11007 flow [2024-06-04 15:03:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:03:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:03:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:03:55,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 15:03:55,771 INFO L175 Difference]: Start difference. First operand has 314 places, 524 transitions, 9584 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:03:55,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 554 transitions, 11007 flow [2024-06-04 15:03:58,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 554 transitions, 10623 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-04 15:03:58,241 INFO L231 Difference]: Finished difference. Result has 316 places, 530 transitions, 9515 flow [2024-06-04 15:03:58,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9202, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9515, PETRI_PLACES=316, PETRI_TRANSITIONS=530} [2024-06-04 15:03:58,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-04 15:03:58,242 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 530 transitions, 9515 flow [2024-06-04 15:03:58,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:03:58,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:58,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:58,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:03:58,242 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)] === [2024-06-04 15:03:58,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:58,243 INFO L85 PathProgramCache]: Analyzing trace with hash -73657897, now seen corresponding path program 1 times [2024-06-04 15:03:58,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:58,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947118253] [2024-06-04 15:03:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:59,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:59,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947118253] [2024-06-04 15:03:59,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947118253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:59,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:59,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:59,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593893182] [2024-06-04 15:03:59,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:59,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:59,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:59,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:59,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:59,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 530 transitions, 9515 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:03:59,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:59,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:59,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:01,295 INFO L124 PetriNetUnfolderBase]: 5715/8789 cut-off events. [2024-06-04 15:04:01,295 INFO L125 PetriNetUnfolderBase]: For 1105430/1105434 co-relation queries the response was YES. [2024-06-04 15:04:01,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85167 conditions, 8789 events. 5715/8789 cut-off events. For 1105430/1105434 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52957 event pairs, 1466 based on Foata normal form. 6/8794 useless extension candidates. Maximal degree in co-relation 85015. Up to 8669 conditions per place. [2024-06-04 15:04:01,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 46 changer transitions 0/554 dead transitions. [2024-06-04 15:04:01,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 554 transitions, 10943 flow [2024-06-04 15:04:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:04:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:04:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:04:01,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:04:01,416 INFO L175 Difference]: Start difference. First operand has 316 places, 530 transitions, 9515 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:04:01,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 554 transitions, 10943 flow [2024-06-04 15:04:03,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 554 transitions, 10824 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 15:04:03,961 INFO L231 Difference]: Finished difference. Result has 320 places, 536 transitions, 9616 flow [2024-06-04 15:04:03,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9616, PETRI_PLACES=320, PETRI_TRANSITIONS=536} [2024-06-04 15:04:03,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-04 15:04:03,961 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 536 transitions, 9616 flow [2024-06-04 15:04:03,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:04:03,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:03,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:03,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:04:03,962 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)] === [2024-06-04 15:04:03,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:03,962 INFO L85 PathProgramCache]: Analyzing trace with hash -73658300, now seen corresponding path program 2 times [2024-06-04 15:04:03,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:03,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96679348] [2024-06-04 15:04:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:03,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:04,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96679348] [2024-06-04 15:04:04,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96679348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:04,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:04,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:04:04,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283125417] [2024-06-04 15:04:04,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:04,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:04:04,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:04:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:04:04,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:04,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 536 transitions, 9616 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:04:04,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:04,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:04,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:07,211 INFO L124 PetriNetUnfolderBase]: 5741/8823 cut-off events. [2024-06-04 15:04:07,212 INFO L125 PetriNetUnfolderBase]: For 1139217/1139225 co-relation queries the response was YES. [2024-06-04 15:04:07,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86111 conditions, 8823 events. 5741/8823 cut-off events. For 1139217/1139225 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53000 event pairs, 1399 based on Foata normal form. 10/8832 useless extension candidates. Maximal degree in co-relation 85957. Up to 8500 conditions per place. [2024-06-04 15:04:07,328 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 451 selfloop transitions, 109 changer transitions 0/563 dead transitions. [2024-06-04 15:04:07,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 563 transitions, 11185 flow [2024-06-04 15:04:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:04:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:04:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:04:07,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-04 15:04:07,329 INFO L175 Difference]: Start difference. First operand has 320 places, 536 transitions, 9616 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:04:07,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 563 transitions, 11185 flow [2024-06-04 15:04:09,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 563 transitions, 11088 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 15:04:09,623 INFO L231 Difference]: Finished difference. Result has 324 places, 542 transitions, 9815 flow [2024-06-04 15:04:09,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9519, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9815, PETRI_PLACES=324, PETRI_TRANSITIONS=542} [2024-06-04 15:04:09,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-04 15:04:09,624 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 542 transitions, 9815 flow [2024-06-04 15:04:09,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:04:09,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:09,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:09,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:04:09,624 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)] === [2024-06-04 15:04:09,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash -840396332, now seen corresponding path program 3 times [2024-06-04 15:04:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:09,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109889217] [2024-06-04 15:04:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:09,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:10,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:10,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109889217] [2024-06-04 15:04:10,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109889217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:10,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:10,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:04:10,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41753704] [2024-06-04 15:04:10,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:04:10,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:04:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:04:10,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:10,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 542 transitions, 9815 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:04:10,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:10,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:10,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:13,128 INFO L124 PetriNetUnfolderBase]: 5735/8815 cut-off events. [2024-06-04 15:04:13,128 INFO L125 PetriNetUnfolderBase]: For 1159770/1159778 co-relation queries the response was YES. [2024-06-04 15:04:13,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86431 conditions, 8815 events. 5735/8815 cut-off events. For 1159770/1159778 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52974 event pairs, 1399 based on Foata normal form. 10/8824 useless extension candidates. Maximal degree in co-relation 86275. Up to 8495 conditions per place. [2024-06-04 15:04:13,245 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 97 changer transitions 0/564 dead transitions. [2024-06-04 15:04:13,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 564 transitions, 11173 flow [2024-06-04 15:04:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:04:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:04:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 15:04:13,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-04 15:04:13,246 INFO L175 Difference]: Start difference. First operand has 324 places, 542 transitions, 9815 flow. Second operand 8 states and 131 transitions. [2024-06-04 15:04:13,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 564 transitions, 11173 flow [2024-06-04 15:04:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 564 transitions, 10981 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 15:04:15,882 INFO L231 Difference]: Finished difference. Result has 328 places, 542 transitions, 9828 flow [2024-06-04 15:04:15,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9623, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9828, PETRI_PLACES=328, PETRI_TRANSITIONS=542} [2024-06-04 15:04:15,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-04 15:04:15,883 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 542 transitions, 9828 flow [2024-06-04 15:04:15,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-04 15:04:15,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:15,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:15,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:04:15,884 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:04:15,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1116730071, now seen corresponding path program 3 times [2024-06-04 15:04:15,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:15,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699870040] [2024-06-04 15:04:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:15,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:16,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699870040] [2024-06-04 15:04:16,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699870040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:16,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:16,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:04:16,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280207075] [2024-06-04 15:04:16,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:16,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:04:16,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:16,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:04:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:04:16,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:16,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 542 transitions, 9828 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:16,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:16,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:16,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:18,882 INFO L124 PetriNetUnfolderBase]: 5745/8832 cut-off events. [2024-06-04 15:04:18,882 INFO L125 PetriNetUnfolderBase]: For 1186159/1186167 co-relation queries the response was YES. [2024-06-04 15:04:18,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86884 conditions, 8832 events. 5745/8832 cut-off events. For 1186159/1186167 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53180 event pairs, 1473 based on Foata normal form. 10/8841 useless extension candidates. Maximal degree in co-relation 86727. Up to 8617 conditions per place. [2024-06-04 15:04:19,006 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 499 selfloop transitions, 61 changer transitions 0/563 dead transitions. [2024-06-04 15:04:19,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 563 transitions, 11396 flow [2024-06-04 15:04:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:04:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:04:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:04:19,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-04 15:04:19,007 INFO L175 Difference]: Start difference. First operand has 328 places, 542 transitions, 9828 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:04:19,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 563 transitions, 11396 flow [2024-06-04 15:04:21,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 563 transitions, 11181 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:04:21,567 INFO L231 Difference]: Finished difference. Result has 328 places, 546 transitions, 9822 flow [2024-06-04 15:04:21,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9822, PETRI_PLACES=328, PETRI_TRANSITIONS=546} [2024-06-04 15:04:21,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-04 15:04:21,568 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 546 transitions, 9822 flow [2024-06-04 15:04:21,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:21,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:21,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:21,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:04:21,569 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:04:21,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1128157911, now seen corresponding path program 4 times [2024-06-04 15:04:21,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:21,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624058922] [2024-06-04 15:04:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:21,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:22,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624058922] [2024-06-04 15:04:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624058922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:22,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:22,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:04:22,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525839597] [2024-06-04 15:04:22,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:22,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:04:22,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:04:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:04:22,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:22,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 546 transitions, 9822 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:22,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:22,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:22,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:24,974 INFO L124 PetriNetUnfolderBase]: 5747/8835 cut-off events. [2024-06-04 15:04:24,974 INFO L125 PetriNetUnfolderBase]: For 1208233/1208241 co-relation queries the response was YES. [2024-06-04 15:04:25,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87100 conditions, 8835 events. 5747/8835 cut-off events. For 1208233/1208241 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53193 event pairs, 1472 based on Foata normal form. 10/8844 useless extension candidates. Maximal degree in co-relation 86942. Up to 8618 conditions per place. [2024-06-04 15:04:25,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 492 selfloop transitions, 67 changer transitions 0/562 dead transitions. [2024-06-04 15:04:25,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 562 transitions, 11212 flow [2024-06-04 15:04:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:04:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:04:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 15:04:25,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-04 15:04:25,092 INFO L175 Difference]: Start difference. First operand has 328 places, 546 transitions, 9822 flow. Second operand 7 states and 113 transitions. [2024-06-04 15:04:25,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 562 transitions, 11212 flow [2024-06-04 15:04:27,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 562 transitions, 11097 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 15:04:27,674 INFO L231 Difference]: Finished difference. Result has 331 places, 549 transitions, 9920 flow [2024-06-04 15:04:27,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9709, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9920, PETRI_PLACES=331, PETRI_TRANSITIONS=549} [2024-06-04 15:04:27,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-04 15:04:27,675 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 549 transitions, 9920 flow [2024-06-04 15:04:27,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:27,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:27,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:27,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:04:27,676 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)] === [2024-06-04 15:04:27,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1487625356, now seen corresponding path program 5 times [2024-06-04 15:04:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743036066] [2024-06-04 15:04:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:27,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:29,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:29,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743036066] [2024-06-04 15:04:29,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743036066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:29,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:29,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:04:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705279548] [2024-06-04 15:04:29,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:29,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:04:29,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:29,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:04:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:04:29,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:29,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 549 transitions, 9920 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:29,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:29,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:29,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:31,676 INFO L124 PetriNetUnfolderBase]: 5714/8784 cut-off events. [2024-06-04 15:04:31,676 INFO L125 PetriNetUnfolderBase]: For 1240982/1240994 co-relation queries the response was YES. [2024-06-04 15:04:31,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85746 conditions, 8784 events. 5714/8784 cut-off events. For 1240982/1240994 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 52942 event pairs, 1177 based on Foata normal form. 30/8813 useless extension candidates. Maximal degree in co-relation 85587. Up to 7280 conditions per place. [2024-06-04 15:04:31,786 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 372 selfloop transitions, 217 changer transitions 0/592 dead transitions. [2024-06-04 15:04:31,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 592 transitions, 11438 flow [2024-06-04 15:04:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:04:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:04:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-04 15:04:31,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-04 15:04:31,788 INFO L175 Difference]: Start difference. First operand has 331 places, 549 transitions, 9920 flow. Second operand 10 states and 183 transitions. [2024-06-04 15:04:31,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 592 transitions, 11438 flow [2024-06-04 15:04:34,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 592 transitions, 11273 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 15:04:34,382 INFO L231 Difference]: Finished difference. Result has 337 places, 549 transitions, 10196 flow [2024-06-04 15:04:34,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9755, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10196, PETRI_PLACES=337, PETRI_TRANSITIONS=549} [2024-06-04 15:04:34,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-04 15:04:34,382 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 549 transitions, 10196 flow [2024-06-04 15:04:34,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:34,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:34,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:34,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:04:34,383 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)] === [2024-06-04 15:04:34,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:34,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1090187526, now seen corresponding path program 6 times [2024-06-04 15:04:34,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:34,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940706500] [2024-06-04 15:04:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:35,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940706500] [2024-06-04 15:04:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940706500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:35,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:35,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:04:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012171823] [2024-06-04 15:04:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:04:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:35,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:04:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:04:35,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:35,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 549 transitions, 10196 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:35,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:35,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:35,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:38,288 INFO L124 PetriNetUnfolderBase]: 5782/8900 cut-off events. [2024-06-04 15:04:38,288 INFO L125 PetriNetUnfolderBase]: For 1266951/1266963 co-relation queries the response was YES. [2024-06-04 15:04:38,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87595 conditions, 8900 events. 5782/8900 cut-off events. For 1266951/1266963 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53640 event pairs, 1265 based on Foata normal form. 30/8929 useless extension candidates. Maximal degree in co-relation 87435. Up to 7369 conditions per place. [2024-06-04 15:04:38,415 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 401 selfloop transitions, 191 changer transitions 0/595 dead transitions. [2024-06-04 15:04:38,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 595 transitions, 11994 flow [2024-06-04 15:04:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:04:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:04:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 15:04:38,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-04 15:04:38,416 INFO L175 Difference]: Start difference. First operand has 337 places, 549 transitions, 10196 flow. Second operand 10 states and 184 transitions. [2024-06-04 15:04:38,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 595 transitions, 11994 flow [2024-06-04 15:04:41,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 595 transitions, 11522 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-04 15:04:41,432 INFO L231 Difference]: Finished difference. Result has 338 places, 551 transitions, 10225 flow [2024-06-04 15:04:41,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9724, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10225, PETRI_PLACES=338, PETRI_TRANSITIONS=551} [2024-06-04 15:04:41,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-04 15:04:41,433 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 551 transitions, 10225 flow [2024-06-04 15:04:41,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:41,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:41,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:41,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:04:41,433 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:04:41,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash 919485096, now seen corresponding path program 7 times [2024-06-04 15:04:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:41,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992011385] [2024-06-04 15:04:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:41,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:42,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:42,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992011385] [2024-06-04 15:04:42,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992011385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:42,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:42,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:04:42,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859794835] [2024-06-04 15:04:42,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:42,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:04:42,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:04:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:04:42,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:42,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 551 transitions, 10225 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 15:04:42,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:42,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:42,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:45,306 INFO L124 PetriNetUnfolderBase]: 5756/8862 cut-off events. [2024-06-04 15:04:45,307 INFO L125 PetriNetUnfolderBase]: For 1244477/1244489 co-relation queries the response was YES. [2024-06-04 15:04:45,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86081 conditions, 8862 events. 5756/8862 cut-off events. For 1244477/1244489 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 53473 event pairs, 1291 based on Foata normal form. 30/8891 useless extension candidates. Maximal degree in co-relation 85920. Up to 7787 conditions per place. [2024-06-04 15:04:45,423 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 165 changer transitions 0/588 dead transitions. [2024-06-04 15:04:45,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 588 transitions, 11896 flow [2024-06-04 15:04:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:04:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:04:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:04:45,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 15:04:45,425 INFO L175 Difference]: Start difference. First operand has 338 places, 551 transitions, 10225 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:04:45,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 588 transitions, 11896 flow [2024-06-04 15:04:48,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 588 transitions, 11363 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-04 15:04:48,658 INFO L231 Difference]: Finished difference. Result has 340 places, 553 transitions, 10085 flow [2024-06-04 15:04:48,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9696, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10085, PETRI_PLACES=340, PETRI_TRANSITIONS=553} [2024-06-04 15:04:48,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-04 15:04:48,659 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 553 transitions, 10085 flow [2024-06-04 15:04:48,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 15:04:48,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:48,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:48,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:04:48,660 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:04:48,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash 919369776, now seen corresponding path program 8 times [2024-06-04 15:04:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:48,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944037138] [2024-06-04 15:04:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:48,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:50,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:50,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944037138] [2024-06-04 15:04:50,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944037138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:50,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:50,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:04:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767847730] [2024-06-04 15:04:50,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:04:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:04:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:04:50,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:50,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 553 transitions, 10085 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 15:04:50,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:50,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:50,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:52,669 INFO L124 PetriNetUnfolderBase]: 5824/8978 cut-off events. [2024-06-04 15:04:52,669 INFO L125 PetriNetUnfolderBase]: For 1266554/1266566 co-relation queries the response was YES. [2024-06-04 15:04:52,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86625 conditions, 8978 events. 5824/8978 cut-off events. For 1266554/1266566 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54369 event pairs, 1317 based on Foata normal form. 30/9007 useless extension candidates. Maximal degree in co-relation 86462. Up to 7889 conditions per place. [2024-06-04 15:04:52,794 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 161 changer transitions 0/594 dead transitions. [2024-06-04 15:04:52,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 594 transitions, 12089 flow [2024-06-04 15:04:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:04:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:04:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:04:52,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 15:04:52,795 INFO L175 Difference]: Start difference. First operand has 340 places, 553 transitions, 10085 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:04:52,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 594 transitions, 12089 flow [2024-06-04 15:04:55,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 594 transitions, 11691 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-04 15:04:55,498 INFO L231 Difference]: Finished difference. Result has 343 places, 557 transitions, 10219 flow [2024-06-04 15:04:55,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10219, PETRI_PLACES=343, PETRI_TRANSITIONS=557} [2024-06-04 15:04:55,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-04 15:04:55,498 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 557 transitions, 10219 flow [2024-06-04 15:04:55,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) [2024-06-04 15:04:55,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:55,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:55,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:04:55,499 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:04:55,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash 565349913, now seen corresponding path program 5 times [2024-06-04 15:04:55,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:55,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474556546] [2024-06-04 15:04:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:56,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:56,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474556546] [2024-06-04 15:04:56,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474556546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:56,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:56,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:04:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233390525] [2024-06-04 15:04:56,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:04:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:56,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:04:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:04:56,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:56,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 557 transitions, 10219 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:04:56,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:56,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:56,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:58,577 INFO L124 PetriNetUnfolderBase]: 5773/8892 cut-off events. [2024-06-04 15:04:58,577 INFO L125 PetriNetUnfolderBase]: For 1209290/1209298 co-relation queries the response was YES. [2024-06-04 15:04:58,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85952 conditions, 8892 events. 5773/8892 cut-off events. For 1209290/1209298 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 53776 event pairs, 1459 based on Foata normal form. 9/8900 useless extension candidates. Maximal degree in co-relation 85787. Up to 8797 conditions per place. [2024-06-04 15:04:58,700 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 526 selfloop transitions, 38 changer transitions 0/567 dead transitions. [2024-06-04 15:04:58,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 567 transitions, 11543 flow [2024-06-04 15:04:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:04:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:04:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-04 15:04:58,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-04 15:04:58,701 INFO L175 Difference]: Start difference. First operand has 343 places, 557 transitions, 10219 flow. Second operand 7 states and 105 transitions. [2024-06-04 15:04:58,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 567 transitions, 11543 flow [2024-06-04 15:05:01,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 567 transitions, 11104 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-04 15:05:01,838 INFO L231 Difference]: Finished difference. Result has 344 places, 557 transitions, 9862 flow [2024-06-04 15:05:01,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9862, PETRI_PLACES=344, PETRI_TRANSITIONS=557} [2024-06-04 15:05:01,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-04 15:05:01,839 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 557 transitions, 9862 flow [2024-06-04 15:05:01,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:05:01,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:01,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:05:01,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:05:01,839 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:05:01,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash -376404329, now seen corresponding path program 6 times [2024-06-04 15:05:01,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:01,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505390820] [2024-06-04 15:05:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:01,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat