./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_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/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_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/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_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 [2024-06-03 20:06:36,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:06:36,533 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:06:36,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:06:36,539 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:06:36,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:06:36,568 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:06:36,568 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:06:36,569 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:06:36,569 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:06:36,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:06:36,569 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:06:36,570 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:06:36,570 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:06:36,570 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:06:36,570 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:06:36,571 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:06:36,571 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:06:36,571 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:06:36,571 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:06:36,571 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:06:36,572 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:06:36,572 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:06:36,572 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:06:36,572 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:06:36,572 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:06:36,572 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:06:36,573 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:06:36,573 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:06:36,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:06:36,573 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:06:36,573 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:06:36,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:06:36,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:06:36,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:06:36,574 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:06:36,574 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:06:36,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:06:36,574 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:06:36,574 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:06:36,574 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:06:36,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:06:36,575 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:06:36,575 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:06:36,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:06:36,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:06:36,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:06:36,820 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:06:36,821 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:06:36,821 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:06:37,872 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:06:38,120 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:06:38,124 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:06:38,140 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f013344/13f7f7f33e3a4aada65f0b336aaf3c5b/FLAGec6fef5e6 [2024-06-03 20:06:38,166 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f013344/13f7f7f33e3a4aada65f0b336aaf3c5b [2024-06-03 20:06:38,168 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:06:38,168 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:06:38,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-03 20:06:38,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:06:38,313 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:06:38,314 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:06:38,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:06:38,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:06:38,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:06:38" (1/2) ... [2024-06-03 20:06:38,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2d9b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:06:38, skipping insertion in model container [2024-06-03 20:06:38,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:06:38" (1/2) ... [2024-06-03 20:06:38,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ff4f3e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:06:38, skipping insertion in model container [2024-06-03 20:06:38,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:06:38" (2/2) ... [2024-06-03 20:06:38,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2d9b7d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38, skipping insertion in model container [2024-06-03 20:06:38,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:06:38" (2/2) ... [2024-06-03 20:06:38,323 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:06:38,392 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:06:38,394 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2))) [2024-06-03 20:06:38,394 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2))) [2024-06-03 20:06:38,394 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2))) [2024-06-03 20:06:38,394 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:06:38,394 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-03 20:06:38,434 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:06:38,729 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:06:38,739 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:06:38,858 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:06:38,891 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:06:38,892 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38 WrapperNode [2024-06-03 20:06:38,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:06:38,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:06:38,893 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:06:38,893 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:06:38,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:38,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:38,958 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-03 20:06:38,958 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:06:38,959 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:06:38,959 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:06:38,959 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:06:38,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:38,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:38,981 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:39,003 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]. [2024-06-03 20:06:39,005 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:39,006 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:39,014 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:39,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:39,025 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:39,031 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:39,034 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:06:39,037 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:06:39,037 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:06:39,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:06:39,038 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (1/1) ... [2024-06-03 20:06:39,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:06:39,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:06:39,060 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) [2024-06-03 20:06:39,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:06:39,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:06:39,089 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:06:39,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:06:39,089 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:06:39,089 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:06:39,089 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:06:39,090 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:06:39,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:06:39,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:06:39,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:06:39,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:06:39,092 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:06:39,077 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 [2024-06-03 20:06:39,209 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:06:39,210 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:06:39,554 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:06:39,554 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:06:39,704 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:06:39,704 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:06:39,705 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:06:39 BoogieIcfgContainer [2024-06-03 20:06:39,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:06:39,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:06:39,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:06:39,709 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:06:39,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:06:38" (1/4) ... [2024-06-03 20:06:39,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614e0e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:06:39, skipping insertion in model container [2024-06-03 20:06:39,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:06:38" (2/4) ... [2024-06-03 20:06:39,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614e0e23 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:06:39, skipping insertion in model container [2024-06-03 20:06:39,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:06:38" (3/4) ... [2024-06-03 20:06:39,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@614e0e23 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:06:39, skipping insertion in model container [2024-06-03 20:06:39,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:06:39" (4/4) ... [2024-06-03 20:06:39,712 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:06:39,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:06:39,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:06:39,726 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:06:39,768 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:06:39,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:06:39,815 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:06:39,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:06:39,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:06:39,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:06:39,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:06:39,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:06:39,830 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;@717dff8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:06:39,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:06:39,833 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:06:39,834 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:06:39,834 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:06:39,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:39,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:06:39,835 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)] === [2024-06-03 20:06:39,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:39,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1352874220, now seen corresponding path program 1 times [2024-06-03 20:06:39,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:39,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519981721] [2024-06-03 20:06:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:39,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:40,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519981721] [2024-06-03 20:06:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519981721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:40,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:40,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:06:40,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678630179] [2024-06-03 20:06:40,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:40,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:06:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:40,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:06:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:06:40,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:06:40,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 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) [2024-06-03 20:06:40,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:40,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:06:40,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:41,274 INFO L124 PetriNetUnfolderBase]: 1156/1755 cut-off events. [2024-06-03 20:06:41,274 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-03 20:06:41,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3584 conditions, 1755 events. 1156/1755 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8046 event pairs, 805 based on Foata normal form. 1/1718 useless extension candidates. Maximal degree in co-relation 3569. Up to 1740 conditions per place. [2024-06-03 20:06:41,287 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 20:06:41,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-03 20:06:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:06:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:06:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-03 20:06:41,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 20:06:41,298 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 70 transitions. [2024-06-03 20:06:41,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-03 20:06:41,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:06:41,303 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:06:41,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 20:06:41,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:06:41,307 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:06:41,308 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) [2024-06-03 20:06:41,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:41,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:41,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:06:41,308 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)] === [2024-06-03 20:06:41,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:41,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1263011443, now seen corresponding path program 1 times [2024-06-03 20:06:41,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:41,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023286115] [2024-06-03 20:06:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:41,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:41,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:41,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023286115] [2024-06-03 20:06:41,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023286115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:41,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:41,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:06:41,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907415123] [2024-06-03 20:06:41,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:41,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:06:41,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:06:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:06:41,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:06:41,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:41,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:41,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:06:41,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:42,147 INFO L124 PetriNetUnfolderBase]: 1150/1746 cut-off events. [2024-06-03 20:06:42,147 INFO L125 PetriNetUnfolderBase]: For 327/334 co-relation queries the response was YES. [2024-06-03 20:06:42,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1746 events. 1150/1746 cut-off events. For 327/334 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7823 event pairs, 699 based on Foata normal form. 7/1749 useless extension candidates. Maximal degree in co-relation 4040. Up to 1716 conditions per place. [2024-06-03 20:06:42,157 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-03 20:06:42,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-03 20:06:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:06:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:06:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-03 20:06:42,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:06:42,161 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 90 transitions. [2024-06-03 20:06:42,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-03 20:06:42,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:06:42,164 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-03 20:06:42,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 20:06:42,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-03 20:06:42,165 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-03 20:06:42,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:42,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:42,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:42,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:06:42,168 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)] === [2024-06-03 20:06:42,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash 498650573, now seen corresponding path program 1 times [2024-06-03 20:06:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:42,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937662727] [2024-06-03 20:06:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:42,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:42,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937662727] [2024-06-03 20:06:42,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937662727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:42,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:42,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:06:42,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847985634] [2024-06-03 20:06:42,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:42,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:06:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:06:42,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:06:42,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:42,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 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) [2024-06-03 20:06:42,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:42,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:42,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:43,117 INFO L124 PetriNetUnfolderBase]: 1385/2087 cut-off events. [2024-06-03 20:06:43,118 INFO L125 PetriNetUnfolderBase]: For 1057/1065 co-relation queries the response was YES. [2024-06-03 20:06:43,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5368 conditions, 2087 events. 1385/2087 cut-off events. For 1057/1065 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9351 event pairs, 709 based on Foata normal form. 9/2093 useless extension candidates. Maximal degree in co-relation 5351. Up to 2043 conditions per place. [2024-06-03 20:06:43,127 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-03 20:06:43,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 357 flow [2024-06-03 20:06:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:06:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:06:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-03 20:06:43,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-03 20:06:43,129 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 106 transitions. [2024-06-03 20:06:43,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 357 flow [2024-06-03 20:06:43,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 336 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:06:43,131 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 206 flow [2024-06-03 20:06:43,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-06-03 20:06:43,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-03 20:06:43,132 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 206 flow [2024-06-03 20:06:43,132 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) [2024-06-03 20:06:43,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:43,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:43,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:06:43,133 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)] === [2024-06-03 20:06:43,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:43,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1721699886, now seen corresponding path program 1 times [2024-06-03 20:06:43,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:43,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228196205] [2024-06-03 20:06:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:43,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:43,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:43,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228196205] [2024-06-03 20:06:43,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228196205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:43,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:43,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:06:43,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627615919] [2024-06-03 20:06:43,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:43,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:06:43,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:43,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:06:43,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:06:43,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:43,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:43,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:43,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:43,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:44,240 INFO L124 PetriNetUnfolderBase]: 1379/2078 cut-off events. [2024-06-03 20:06:44,241 INFO L125 PetriNetUnfolderBase]: For 1874/1893 co-relation queries the response was YES. [2024-06-03 20:06:44,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5905 conditions, 2078 events. 1379/2078 cut-off events. For 1874/1893 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9304 event pairs, 584 based on Foata normal form. 15/2090 useless extension candidates. Maximal degree in co-relation 5885. Up to 2019 conditions per place. [2024-06-03 20:06:44,251 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 61 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-03 20:06:44,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 78 transitions, 440 flow [2024-06-03 20:06:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:06:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:06:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-03 20:06:44,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2024-06-03 20:06:44,254 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 206 flow. Second operand 6 states and 125 transitions. [2024-06-03 20:06:44,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 78 transitions, 440 flow [2024-06-03 20:06:44,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 436 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:06:44,260 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 258 flow [2024-06-03 20:06:44,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-03 20:06:44,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-03 20:06:44,261 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 258 flow [2024-06-03 20:06:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:44,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:44,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:44,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:06:44,262 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:44,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1833087348, now seen corresponding path program 1 times [2024-06-03 20:06:44,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:44,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016947985] [2024-06-03 20:06:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:44,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:45,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:45,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016947985] [2024-06-03 20:06:45,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016947985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:45,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:45,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:06:45,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036059954] [2024-06-03 20:06:45,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:45,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:06:45,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:45,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:06:45,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:06:45,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:45,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 258 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) [2024-06-03 20:06:45,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:45,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:45,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:45,553 INFO L124 PetriNetUnfolderBase]: 1433/2162 cut-off events. [2024-06-03 20:06:45,553 INFO L125 PetriNetUnfolderBase]: For 3177/3196 co-relation queries the response was YES. [2024-06-03 20:06:45,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6680 conditions, 2162 events. 1433/2162 cut-off events. For 3177/3196 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9814 event pairs, 449 based on Foata normal form. 30/2189 useless extension candidates. Maximal degree in co-relation 6657. Up to 1965 conditions per place. [2024-06-03 20:06:45,564 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 79 selfloop transitions, 24 changer transitions 0/107 dead transitions. [2024-06-03 20:06:45,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 107 transitions, 650 flow [2024-06-03 20:06:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 20:06:45,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 20:06:45,567 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 258 flow. Second operand 7 states and 156 transitions. [2024-06-03 20:06:45,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 107 transitions, 650 flow [2024-06-03 20:06:45,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 107 transitions, 620 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:45,575 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 387 flow [2024-06-03 20:06:45,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-03 20:06:45,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-03 20:06:45,576 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 387 flow [2024-06-03 20:06:45,577 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) [2024-06-03 20:06:45,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:45,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:45,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:06:45,578 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)] === [2024-06-03 20:06:45,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:45,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1504971726, now seen corresponding path program 1 times [2024-06-03 20:06:45,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:45,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989195585] [2024-06-03 20:06:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:45,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:46,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:46,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989195585] [2024-06-03 20:06:46,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989195585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:46,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:46,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:06:46,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894340605] [2024-06-03 20:06:46,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:46,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:06:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:46,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:06:46,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:06:46,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:46,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:46,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:46,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:46,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:46,652 INFO L124 PetriNetUnfolderBase]: 1652/2477 cut-off events. [2024-06-03 20:06:46,652 INFO L125 PetriNetUnfolderBase]: For 6808/6808 co-relation queries the response was YES. [2024-06-03 20:06:46,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8953 conditions, 2477 events. 1652/2477 cut-off events. For 6808/6808 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11364 event pairs, 663 based on Foata normal form. 4/2479 useless extension candidates. Maximal degree in co-relation 8925. Up to 2436 conditions per place. [2024-06-03 20:06:46,666 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 72 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2024-06-03 20:06:46,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 625 flow [2024-06-03 20:06:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:06:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:06:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-03 20:06:46,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-03 20:06:46,668 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 387 flow. Second operand 5 states and 84 transitions. [2024-06-03 20:06:46,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 625 flow [2024-06-03 20:06:46,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 613 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 20:06:46,674 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 456 flow [2024-06-03 20:06:46,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-03 20:06:46,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-03 20:06:46,674 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 456 flow [2024-06-03 20:06:46,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:06:46,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:46,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:46,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:06:46,675 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)] === [2024-06-03 20:06:46,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:46,676 INFO L85 PathProgramCache]: Analyzing trace with hash 948681495, now seen corresponding path program 1 times [2024-06-03 20:06:46,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:46,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731618905] [2024-06-03 20:06:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:46,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:47,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731618905] [2024-06-03 20:06:47,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731618905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:47,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:47,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78400082] [2024-06-03 20:06:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:47,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:06:47,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 456 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) [2024-06-03 20:06:47,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:47,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:06:47,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:47,879 INFO L124 PetriNetUnfolderBase]: 1622/2438 cut-off events. [2024-06-03 20:06:47,880 INFO L125 PetriNetUnfolderBase]: For 8693/8752 co-relation queries the response was YES. [2024-06-03 20:06:47,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9593 conditions, 2438 events. 1622/2438 cut-off events. For 8693/8752 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11200 event pairs, 603 based on Foata normal form. 24/2447 useless extension candidates. Maximal degree in co-relation 9560. Up to 2334 conditions per place. [2024-06-03 20:06:47,901 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 74 selfloop transitions, 24 changer transitions 0/104 dead transitions. [2024-06-03 20:06:47,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 794 flow [2024-06-03 20:06:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 20:06:47,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-03 20:06:47,903 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 456 flow. Second operand 7 states and 127 transitions. [2024-06-03 20:06:47,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 794 flow [2024-06-03 20:06:47,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 104 transitions, 788 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 20:06:47,910 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 560 flow [2024-06-03 20:06:47,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-03 20:06:47,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-03 20:06:47,911 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 560 flow [2024-06-03 20:06:47,911 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) [2024-06-03 20:06:47,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:47,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:06:47,912 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)] === [2024-06-03 20:06:47,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 948801651, now seen corresponding path program 1 times [2024-06-03 20:06:47,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:47,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776786606] [2024-06-03 20:06:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:48,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:48,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776786606] [2024-06-03 20:06:48,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776786606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:48,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:48,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:48,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536913421] [2024-06-03 20:06:48,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:48,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:48,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:48,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:48,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:48,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:48,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 560 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) [2024-06-03 20:06:48,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:48,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:48,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:49,128 INFO L124 PetriNetUnfolderBase]: 1717/2571 cut-off events. [2024-06-03 20:06:49,128 INFO L125 PetriNetUnfolderBase]: For 10876/10878 co-relation queries the response was YES. [2024-06-03 20:06:49,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10420 conditions, 2571 events. 1717/2571 cut-off events. For 10876/10878 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11733 event pairs, 611 based on Foata normal form. 4/2573 useless extension candidates. Maximal degree in co-relation 10384. Up to 2459 conditions per place. [2024-06-03 20:06:49,141 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 97 selfloop transitions, 20 changer transitions 0/120 dead transitions. [2024-06-03 20:06:49,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 120 transitions, 990 flow [2024-06-03 20:06:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:06:49,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-03 20:06:49,143 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 560 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:06:49,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 120 transitions, 990 flow [2024-06-03 20:06:49,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 120 transitions, 947 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:06:49,156 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 694 flow [2024-06-03 20:06:49,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2024-06-03 20:06:49,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-03 20:06:49,158 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 694 flow [2024-06-03 20:06:49,158 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) [2024-06-03 20:06:49,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:49,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:49,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:06:49,158 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)] === [2024-06-03 20:06:49,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:49,159 INFO L85 PathProgramCache]: Analyzing trace with hash 678056025, now seen corresponding path program 2 times [2024-06-03 20:06:49,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:49,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135791293] [2024-06-03 20:06:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:49,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:49,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:49,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135791293] [2024-06-03 20:06:49,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135791293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:49,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:49,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:49,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118829788] [2024-06-03 20:06:49,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:49,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:50,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:06:50,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 694 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) [2024-06-03 20:06:50,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:50,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:06:50,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:50,511 INFO L124 PetriNetUnfolderBase]: 1644/2483 cut-off events. [2024-06-03 20:06:50,511 INFO L125 PetriNetUnfolderBase]: For 13966/14151 co-relation queries the response was YES. [2024-06-03 20:06:50,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11045 conditions, 2483 events. 1644/2483 cut-off events. For 13966/14151 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11521 event pairs, 552 based on Foata normal form. 6/2439 useless extension candidates. Maximal degree in co-relation 11004. Up to 2374 conditions per place. [2024-06-03 20:06:50,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 83 selfloop transitions, 27 changer transitions 0/120 dead transitions. [2024-06-03 20:06:50,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 120 transitions, 1023 flow [2024-06-03 20:06:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:06:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:06:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:06:50,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-03 20:06:50,529 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 694 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:06:50,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 120 transitions, 1023 flow [2024-06-03 20:06:50,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 120 transitions, 1007 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-03 20:06:50,547 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 800 flow [2024-06-03 20:06:50,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=800, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-03 20:06:50,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-03 20:06:50,548 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 800 flow [2024-06-03 20:06:50,548 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) [2024-06-03 20:06:50,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:50,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:50,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:06:50,549 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)] === [2024-06-03 20:06:50,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash 484183663, now seen corresponding path program 2 times [2024-06-03 20:06:50,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:50,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496181028] [2024-06-03 20:06:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:50,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:51,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496181028] [2024-06-03 20:06:51,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496181028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:51,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:51,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136157123] [2024-06-03 20:06:51,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:51,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:51,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:51,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 800 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) [2024-06-03 20:06:51,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:51,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:51,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:51,763 INFO L124 PetriNetUnfolderBase]: 1760/2633 cut-off events. [2024-06-03 20:06:51,763 INFO L125 PetriNetUnfolderBase]: For 15902/15904 co-relation queries the response was YES. [2024-06-03 20:06:51,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11866 conditions, 2633 events. 1760/2633 cut-off events. For 15902/15904 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12037 event pairs, 622 based on Foata normal form. 6/2637 useless extension candidates. Maximal degree in co-relation 11822. Up to 2583 conditions per place. [2024-06-03 20:06:51,778 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2024-06-03 20:06:51,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1101 flow [2024-06-03 20:06:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:06:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:06:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-03 20:06:51,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:06:51,780 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 800 flow. Second operand 6 states and 98 transitions. [2024-06-03 20:06:51,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1101 flow [2024-06-03 20:06:51,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 1032 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:51,798 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 790 flow [2024-06-03 20:06:51,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=790, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-03 20:06:51,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-03 20:06:51,802 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 790 flow [2024-06-03 20:06:51,802 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) [2024-06-03 20:06:51,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:51,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:51,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:06:51,803 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)] === [2024-06-03 20:06:51,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash 483946513, now seen corresponding path program 3 times [2024-06-03 20:06:51,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:51,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837454280] [2024-06-03 20:06:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:51,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:52,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837454280] [2024-06-03 20:06:52,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837454280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:52,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:52,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:52,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395048657] [2024-06-03 20:06:52,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:52,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:52,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:52,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:52,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:52,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:52,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 790 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) [2024-06-03 20:06:52,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:52,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:52,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:53,015 INFO L124 PetriNetUnfolderBase]: 1750/2619 cut-off events. [2024-06-03 20:06:53,015 INFO L125 PetriNetUnfolderBase]: For 17916/17918 co-relation queries the response was YES. [2024-06-03 20:06:53,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 2619 events. 1750/2619 cut-off events. For 17916/17918 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11954 event pairs, 609 based on Foata normal form. 4/2621 useless extension candidates. Maximal degree in co-relation 11915. Up to 2500 conditions per place. [2024-06-03 20:06:53,031 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 24 changer transitions 0/124 dead transitions. [2024-06-03 20:06:53,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 124 transitions, 1106 flow [2024-06-03 20:06:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:06:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:06:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-03 20:06:53,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:06:53,034 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 790 flow. Second operand 6 states and 105 transitions. [2024-06-03 20:06:53,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 124 transitions, 1106 flow [2024-06-03 20:06:53,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 124 transitions, 1075 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:53,058 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 846 flow [2024-06-03 20:06:53,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=846, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-06-03 20:06:53,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-03 20:06:53,059 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 846 flow [2024-06-03 20:06:53,059 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) [2024-06-03 20:06:53,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:53,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:53,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:06:53,060 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)] === [2024-06-03 20:06:53,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash 483946327, now seen corresponding path program 3 times [2024-06-03 20:06:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:53,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73328296] [2024-06-03 20:06:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:53,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:53,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:53,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73328296] [2024-06-03 20:06:53,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73328296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:53,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:53,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:06:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24436499] [2024-06-03 20:06:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:53,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:06:53,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:06:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:06:53,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:06:53,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 846 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) [2024-06-03 20:06:53,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:53,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:06:53,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:54,295 INFO L124 PetriNetUnfolderBase]: 1653/2496 cut-off events. [2024-06-03 20:06:54,295 INFO L125 PetriNetUnfolderBase]: For 20341/20516 co-relation queries the response was YES. [2024-06-03 20:06:54,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11853 conditions, 2496 events. 1653/2496 cut-off events. For 20341/20516 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11547 event pairs, 550 based on Foata normal form. 18/2465 useless extension candidates. Maximal degree in co-relation 11807. Up to 2379 conditions per place. [2024-06-03 20:06:54,310 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 26 changer transitions 0/124 dead transitions. [2024-06-03 20:06:54,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 124 transitions, 1124 flow [2024-06-03 20:06:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:06:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:06:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 20:06:54,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-03 20:06:54,312 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 846 flow. Second operand 6 states and 110 transitions. [2024-06-03 20:06:54,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 124 transitions, 1124 flow [2024-06-03 20:06:54,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 124 transitions, 1067 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:54,333 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 855 flow [2024-06-03 20:06:54,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=855, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2024-06-03 20:06:54,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-03 20:06:54,334 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 855 flow [2024-06-03 20:06:54,334 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) [2024-06-03 20:06:54,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:54,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:54,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:06:54,335 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)] === [2024-06-03 20:06:54,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:54,336 INFO L85 PathProgramCache]: Analyzing trace with hash 484192591, now seen corresponding path program 1 times [2024-06-03 20:06:54,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:54,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425009637] [2024-06-03 20:06:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:54,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:55,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425009637] [2024-06-03 20:06:55,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425009637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:55,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:55,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647543004] [2024-06-03 20:06:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:55,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:55,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 855 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) [2024-06-03 20:06:55,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:55,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:55,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:55,778 INFO L124 PetriNetUnfolderBase]: 1734/2596 cut-off events. [2024-06-03 20:06:55,778 INFO L125 PetriNetUnfolderBase]: For 19910/19912 co-relation queries the response was YES. [2024-06-03 20:06:55,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12108 conditions, 2596 events. 1734/2596 cut-off events. For 19910/19912 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11838 event pairs, 600 based on Foata normal form. 6/2600 useless extension candidates. Maximal degree in co-relation 12062. Up to 2537 conditions per place. [2024-06-03 20:06:55,795 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 106 selfloop transitions, 13 changer transitions 0/122 dead transitions. [2024-06-03 20:06:55,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 122 transitions, 1155 flow [2024-06-03 20:06:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:06:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:06:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-03 20:06:55,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:06:55,797 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 855 flow. Second operand 6 states and 98 transitions. [2024-06-03 20:06:55,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 122 transitions, 1155 flow [2024-06-03 20:06:55,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 122 transitions, 1092 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:55,816 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 843 flow [2024-06-03 20:06:55,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=843, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-03 20:06:55,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-03 20:06:55,817 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 843 flow [2024-06-03 20:06:55,817 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) [2024-06-03 20:06:55,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:55,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:55,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:06:55,818 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)] === [2024-06-03 20:06:55,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash -655734212, now seen corresponding path program 1 times [2024-06-03 20:06:55,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:55,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819955476] [2024-06-03 20:06:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:55,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:56,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:56,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819955476] [2024-06-03 20:06:56,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819955476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:56,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:56,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900153428] [2024-06-03 20:06:56,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:56,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:56,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:06:56,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 843 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) [2024-06-03 20:06:56,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:56,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:06:56,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:57,294 INFO L124 PetriNetUnfolderBase]: 1667/2516 cut-off events. [2024-06-03 20:06:57,294 INFO L125 PetriNetUnfolderBase]: For 24396/24470 co-relation queries the response was YES. [2024-06-03 20:06:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12325 conditions, 2516 events. 1667/2516 cut-off events. For 24396/24470 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11679 event pairs, 543 based on Foata normal form. 51/2515 useless extension candidates. Maximal degree in co-relation 12278. Up to 2300 conditions per place. [2024-06-03 20:06:57,310 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 44 changer transitions 0/149 dead transitions. [2024-06-03 20:06:57,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 149 transitions, 1317 flow [2024-06-03 20:06:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:06:57,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 20:06:57,312 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 843 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:06:57,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 149 transitions, 1317 flow [2024-06-03 20:06:57,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 1284 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:57,333 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 969 flow [2024-06-03 20:06:57,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=969, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-03 20:06:57,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-03 20:06:57,334 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 969 flow [2024-06-03 20:06:57,334 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) [2024-06-03 20:06:57,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:57,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:57,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:06:57,335 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)] === [2024-06-03 20:06:57,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:57,335 INFO L85 PathProgramCache]: Analyzing trace with hash -655643847, now seen corresponding path program 1 times [2024-06-03 20:06:57,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:57,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028710415] [2024-06-03 20:06:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:57,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:58,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:58,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028710415] [2024-06-03 20:06:58,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028710415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:58,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:58,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:58,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860764381] [2024-06-03 20:06:58,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:58,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:58,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:58,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:58,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:58,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:58,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 969 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) [2024-06-03 20:06:58,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:58,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:58,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:58,567 INFO L124 PetriNetUnfolderBase]: 1788/2674 cut-off events. [2024-06-03 20:06:58,567 INFO L125 PetriNetUnfolderBase]: For 26922/26924 co-relation queries the response was YES. [2024-06-03 20:06:58,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13404 conditions, 2674 events. 1788/2674 cut-off events. For 26922/26924 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12277 event pairs, 557 based on Foata normal form. 4/2676 useless extension candidates. Maximal degree in co-relation 13356. Up to 2436 conditions per place. [2024-06-03 20:06:58,583 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 35 changer transitions 0/161 dead transitions. [2024-06-03 20:06:58,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 161 transitions, 1566 flow [2024-06-03 20:06:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:06:58,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-03 20:06:58,585 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 969 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:06:58,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 161 transitions, 1566 flow [2024-06-03 20:06:58,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 161 transitions, 1484 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:58,612 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1117 flow [2024-06-03 20:06:58,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1117, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-03 20:06:58,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-03 20:06:58,613 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1117 flow [2024-06-03 20:06:58,613 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) [2024-06-03 20:06:58,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:58,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:58,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:06:58,614 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)] === [2024-06-03 20:06:58,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:58,614 INFO L85 PathProgramCache]: Analyzing trace with hash -651919197, now seen corresponding path program 2 times [2024-06-03 20:06:58,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:58,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629748112] [2024-06-03 20:06:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:58,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:59,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:59,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629748112] [2024-06-03 20:06:59,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629748112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:59,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:59,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:06:59,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506852186] [2024-06-03 20:06:59,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:59,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:06:59,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:06:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:06:59,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:06:59,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1117 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) [2024-06-03 20:06:59,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:59,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:06:59,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:00,008 INFO L124 PetriNetUnfolderBase]: 1842/2752 cut-off events. [2024-06-03 20:07:00,008 INFO L125 PetriNetUnfolderBase]: For 31537/31539 co-relation queries the response was YES. [2024-06-03 20:07:00,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14560 conditions, 2752 events. 1842/2752 cut-off events. For 31537/31539 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12609 event pairs, 574 based on Foata normal form. 4/2754 useless extension candidates. Maximal degree in co-relation 14508. Up to 2577 conditions per place. [2024-06-03 20:07:00,027 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 137 selfloop transitions, 33 changer transitions 0/173 dead transitions. [2024-06-03 20:07:00,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 173 transitions, 1708 flow [2024-06-03 20:07:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-03 20:07:00,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:07:00,029 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1117 flow. Second operand 10 states and 165 transitions. [2024-06-03 20:07:00,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 173 transitions, 1708 flow [2024-06-03 20:07:00,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 173 transitions, 1638 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 20:07:00,057 INFO L231 Difference]: Finished difference. Result has 113 places, 132 transitions, 1212 flow [2024-06-03 20:07:00,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1212, PETRI_PLACES=113, PETRI_TRANSITIONS=132} [2024-06-03 20:07:00,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-03 20:07:00,058 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 132 transitions, 1212 flow [2024-06-03 20:07:00,058 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) [2024-06-03 20:07:00,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:00,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:00,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:07:00,059 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:00,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:00,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1513202414, now seen corresponding path program 2 times [2024-06-03 20:07:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:00,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722127054] [2024-06-03 20:07:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:00,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:00,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:00,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722127054] [2024-06-03 20:07:00,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722127054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:00,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:00,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:00,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620302108] [2024-06-03 20:07:00,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:00,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:00,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:00,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:00,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:01,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:07:01,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 132 transitions, 1212 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) [2024-06-03 20:07:01,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:01,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:07:01,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:01,689 INFO L124 PetriNetUnfolderBase]: 1855/2782 cut-off events. [2024-06-03 20:07:01,690 INFO L125 PetriNetUnfolderBase]: For 39209/39300 co-relation queries the response was YES. [2024-06-03 20:07:01,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15387 conditions, 2782 events. 1855/2782 cut-off events. For 39209/39300 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13058 event pairs, 542 based on Foata normal form. 10/2739 useless extension candidates. Maximal degree in co-relation 15332. Up to 2524 conditions per place. [2024-06-03 20:07:01,710 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 119 selfloop transitions, 47 changer transitions 0/185 dead transitions. [2024-06-03 20:07:01,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 185 transitions, 1900 flow [2024-06-03 20:07:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:07:01,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-03 20:07:01,711 INFO L175 Difference]: Start difference. First operand has 113 places, 132 transitions, 1212 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:07:01,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 185 transitions, 1900 flow [2024-06-03 20:07:01,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 185 transitions, 1854 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:01,744 INFO L231 Difference]: Finished difference. Result has 118 places, 150 transitions, 1457 flow [2024-06-03 20:07:01,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1457, PETRI_PLACES=118, PETRI_TRANSITIONS=150} [2024-06-03 20:07:01,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-03 20:07:01,745 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 150 transitions, 1457 flow [2024-06-03 20:07:01,745 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) [2024-06-03 20:07:01,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:01,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:01,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:07:01,746 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)] === [2024-06-03 20:07:01,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:01,746 INFO L85 PathProgramCache]: Analyzing trace with hash -651924777, now seen corresponding path program 3 times [2024-06-03 20:07:01,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:01,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949641388] [2024-06-03 20:07:01,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:01,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:02,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949641388] [2024-06-03 20:07:02,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949641388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:02,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:02,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:02,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799563809] [2024-06-03 20:07:02,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:02,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:02,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:02,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:02,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 150 transitions, 1457 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) [2024-06-03 20:07:02,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:02,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:02,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:03,163 INFO L124 PetriNetUnfolderBase]: 1894/2825 cut-off events. [2024-06-03 20:07:03,163 INFO L125 PetriNetUnfolderBase]: For 40649/40651 co-relation queries the response was YES. [2024-06-03 20:07:03,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16218 conditions, 2825 events. 1894/2825 cut-off events. For 40649/40651 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13007 event pairs, 577 based on Foata normal form. 4/2827 useless extension candidates. Maximal degree in co-relation 16159. Up to 2656 conditions per place. [2024-06-03 20:07:03,183 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 32 changer transitions 0/181 dead transitions. [2024-06-03 20:07:03,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 181 transitions, 1903 flow [2024-06-03 20:07:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:07:03,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-03 20:07:03,184 INFO L175 Difference]: Start difference. First operand has 118 places, 150 transitions, 1457 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:07:03,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 181 transitions, 1903 flow [2024-06-03 20:07:03,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 181 transitions, 1855 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-03 20:07:03,227 INFO L231 Difference]: Finished difference. Result has 125 places, 150 transitions, 1481 flow [2024-06-03 20:07:03,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1481, PETRI_PLACES=125, PETRI_TRANSITIONS=150} [2024-06-03 20:07:03,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-03 20:07:03,228 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 150 transitions, 1481 flow [2024-06-03 20:07:03,228 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) [2024-06-03 20:07:03,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:03,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:03,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:07:03,228 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)] === [2024-06-03 20:07:03,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2125059486, now seen corresponding path program 1 times [2024-06-03 20:07:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:03,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246583580] [2024-06-03 20:07:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:03,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246583580] [2024-06-03 20:07:04,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246583580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:04,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:04,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890985038] [2024-06-03 20:07:04,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:04,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:04,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 1481 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) [2024-06-03 20:07:04,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:04,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:04,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:04,635 INFO L124 PetriNetUnfolderBase]: 1889/2818 cut-off events. [2024-06-03 20:07:04,635 INFO L125 PetriNetUnfolderBase]: For 43838/43840 co-relation queries the response was YES. [2024-06-03 20:07:04,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16360 conditions, 2818 events. 1889/2818 cut-off events. For 43838/43840 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12980 event pairs, 584 based on Foata normal form. 4/2820 useless extension candidates. Maximal degree in co-relation 16298. Up to 2750 conditions per place. [2024-06-03 20:07:04,654 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 150 selfloop transitions, 17 changer transitions 0/170 dead transitions. [2024-06-03 20:07:04,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 170 transitions, 1891 flow [2024-06-03 20:07:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:07:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:07:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-03 20:07:04,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:07:04,656 INFO L175 Difference]: Start difference. First operand has 125 places, 150 transitions, 1481 flow. Second operand 6 states and 99 transitions. [2024-06-03 20:07:04,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 170 transitions, 1891 flow [2024-06-03 20:07:04,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 170 transitions, 1827 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:04,697 INFO L231 Difference]: Finished difference. Result has 124 places, 153 transitions, 1495 flow [2024-06-03 20:07:04,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1495, PETRI_PLACES=124, PETRI_TRANSITIONS=153} [2024-06-03 20:07:04,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-03 20:07:04,698 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 153 transitions, 1495 flow [2024-06-03 20:07:04,698 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) [2024-06-03 20:07:04,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:04,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:04,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:07:04,699 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)] === [2024-06-03 20:07:04,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:04,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1290952007, now seen corresponding path program 4 times [2024-06-03 20:07:04,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:04,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224086682] [2024-06-03 20:07:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:04,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224086682] [2024-06-03 20:07:05,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224086682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:05,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:05,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:05,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029424323] [2024-06-03 20:07:05,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:05,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:05,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:05,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 153 transitions, 1495 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) [2024-06-03 20:07:05,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:05,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:05,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:05,923 INFO L124 PetriNetUnfolderBase]: 1911/2850 cut-off events. [2024-06-03 20:07:05,923 INFO L125 PetriNetUnfolderBase]: For 48545/48547 co-relation queries the response was YES. [2024-06-03 20:07:05,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16961 conditions, 2850 events. 1911/2850 cut-off events. For 48545/48547 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13131 event pairs, 586 based on Foata normal form. 4/2852 useless extension candidates. Maximal degree in co-relation 16898. Up to 2677 conditions per place. [2024-06-03 20:07:05,943 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 28 changer transitions 0/188 dead transitions. [2024-06-03 20:07:05,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 188 transitions, 2064 flow [2024-06-03 20:07:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 20:07:05,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-03 20:07:05,944 INFO L175 Difference]: Start difference. First operand has 124 places, 153 transitions, 1495 flow. Second operand 7 states and 127 transitions. [2024-06-03 20:07:05,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 188 transitions, 2064 flow [2024-06-03 20:07:05,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 188 transitions, 2028 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:07:05,993 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 1573 flow [2024-06-03 20:07:05,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1573, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-06-03 20:07:05,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-03 20:07:05,994 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 1573 flow [2024-06-03 20:07:05,994 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) [2024-06-03 20:07:05,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:05,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:05,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:07:05,994 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)] === [2024-06-03 20:07:05,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2117434974, now seen corresponding path program 3 times [2024-06-03 20:07:05,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:05,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082752425] [2024-06-03 20:07:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:05,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:06,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:06,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082752425] [2024-06-03 20:07:06,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082752425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:06,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:06,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:06,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295429057] [2024-06-03 20:07:06,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:06,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:06,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:07,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:07:07,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 1573 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) [2024-06-03 20:07:07,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:07,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:07:07,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:07,561 INFO L124 PetriNetUnfolderBase]: 1848/2776 cut-off events. [2024-06-03 20:07:07,562 INFO L125 PetriNetUnfolderBase]: For 57433/57539 co-relation queries the response was YES. [2024-06-03 20:07:07,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17259 conditions, 2776 events. 1848/2776 cut-off events. For 57433/57539 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12999 event pairs, 537 based on Foata normal form. 19/2738 useless extension candidates. Maximal degree in co-relation 17194. Up to 2588 conditions per place. [2024-06-03 20:07:07,583 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 128 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-03 20:07:07,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1973 flow [2024-06-03 20:07:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:07:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 20:07:07,584 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 1573 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:07:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1973 flow [2024-06-03 20:07:07,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 185 transitions, 1851 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:07,644 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1537 flow [2024-06-03 20:07:07,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1537, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-03 20:07:07,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-03 20:07:07,645 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1537 flow [2024-06-03 20:07:07,645 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) [2024-06-03 20:07:07,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:07,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:07,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:07:07,645 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)] === [2024-06-03 20:07:07,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2117440709, now seen corresponding path program 5 times [2024-06-03 20:07:07,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:07,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584385139] [2024-06-03 20:07:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:07,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:08,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584385139] [2024-06-03 20:07:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584385139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:08,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:08,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397698609] [2024-06-03 20:07:08,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:08,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:08,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1537 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) [2024-06-03 20:07:08,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:08,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:08,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:08,891 INFO L124 PetriNetUnfolderBase]: 1925/2871 cut-off events. [2024-06-03 20:07:08,891 INFO L125 PetriNetUnfolderBase]: For 56644/56646 co-relation queries the response was YES. [2024-06-03 20:07:08,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17369 conditions, 2871 events. 1925/2871 cut-off events. For 56644/56646 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13218 event pairs, 592 based on Foata normal form. 4/2873 useless extension candidates. Maximal degree in co-relation 17304. Up to 2685 conditions per place. [2024-06-03 20:07:08,912 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 156 selfloop transitions, 29 changer transitions 0/188 dead transitions. [2024-06-03 20:07:08,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 188 transitions, 2097 flow [2024-06-03 20:07:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:07:08,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-03 20:07:08,914 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1537 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:07:08,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 188 transitions, 2097 flow [2024-06-03 20:07:08,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 188 transitions, 2029 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:08,973 INFO L231 Difference]: Finished difference. Result has 131 places, 160 transitions, 1563 flow [2024-06-03 20:07:08,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1563, PETRI_PLACES=131, PETRI_TRANSITIONS=160} [2024-06-03 20:07:08,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-03 20:07:08,973 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 160 transitions, 1563 flow [2024-06-03 20:07:08,974 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) [2024-06-03 20:07:08,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:08,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:08,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:07:08,974 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)] === [2024-06-03 20:07:08,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2124792359, now seen corresponding path program 6 times [2024-06-03 20:07:08,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:08,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089218313] [2024-06-03 20:07:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:09,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:09,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089218313] [2024-06-03 20:07:09,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089218313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:09,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:09,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:07:09,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798870064] [2024-06-03 20:07:09,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:09,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:07:09,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:07:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:07:09,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:09,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 160 transitions, 1563 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) [2024-06-03 20:07:09,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:09,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:09,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:10,351 INFO L124 PetriNetUnfolderBase]: 1915/2857 cut-off events. [2024-06-03 20:07:10,351 INFO L125 PetriNetUnfolderBase]: For 60286/60288 co-relation queries the response was YES. [2024-06-03 20:07:10,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17472 conditions, 2857 events. 1915/2857 cut-off events. For 60286/60288 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13179 event pairs, 586 based on Foata normal form. 6/2861 useless extension candidates. Maximal degree in co-relation 17406. Up to 2784 conditions per place. [2024-06-03 20:07:10,370 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 165 selfloop transitions, 15 changer transitions 0/183 dead transitions. [2024-06-03 20:07:10,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 183 transitions, 1997 flow [2024-06-03 20:07:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 20:07:10,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-03 20:07:10,371 INFO L175 Difference]: Start difference. First operand has 131 places, 160 transitions, 1563 flow. Second operand 7 states and 113 transitions. [2024-06-03 20:07:10,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 183 transitions, 1997 flow [2024-06-03 20:07:10,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1949 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:07:10,442 INFO L231 Difference]: Finished difference. Result has 135 places, 161 transitions, 1565 flow [2024-06-03 20:07:10,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1565, PETRI_PLACES=135, PETRI_TRANSITIONS=161} [2024-06-03 20:07:10,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-03 20:07:10,443 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 161 transitions, 1565 flow [2024-06-03 20:07:10,444 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) [2024-06-03 20:07:10,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:10,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:10,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:07:10,444 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:10,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1472688367, now seen corresponding path program 1 times [2024-06-03 20:07:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:10,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262852848] [2024-06-03 20:07:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:11,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:11,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262852848] [2024-06-03 20:07:11,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262852848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:11,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:11,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:07:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404092501] [2024-06-03 20:07:11,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:11,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:07:11,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:07:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:07:11,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:07:11,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 161 transitions, 1565 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) [2024-06-03 20:07:11,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:11,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:07:11,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:11,745 INFO L124 PetriNetUnfolderBase]: 1828/2754 cut-off events. [2024-06-03 20:07:11,745 INFO L125 PetriNetUnfolderBase]: For 64669/64688 co-relation queries the response was YES. [2024-06-03 20:07:11,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17046 conditions, 2754 events. 1828/2754 cut-off events. For 64669/64688 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12791 event pairs, 571 based on Foata normal form. 13/2755 useless extension candidates. Maximal degree in co-relation 16979. Up to 2642 conditions per place. [2024-06-03 20:07:11,765 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 140 selfloop transitions, 15 changer transitions 0/170 dead transitions. [2024-06-03 20:07:11,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 170 transitions, 1897 flow [2024-06-03 20:07:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:07:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:07:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-03 20:07:11,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-03 20:07:11,766 INFO L175 Difference]: Start difference. First operand has 135 places, 161 transitions, 1565 flow. Second operand 5 states and 84 transitions. [2024-06-03 20:07:11,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 170 transitions, 1897 flow [2024-06-03 20:07:11,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 170 transitions, 1857 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:11,837 INFO L231 Difference]: Finished difference. Result has 135 places, 161 transitions, 1564 flow [2024-06-03 20:07:11,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1564, PETRI_PLACES=135, PETRI_TRANSITIONS=161} [2024-06-03 20:07:11,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-03 20:07:11,837 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 161 transitions, 1564 flow [2024-06-03 20:07:11,838 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) [2024-06-03 20:07:11,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:11,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:11,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:07:11,838 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)] === [2024-06-03 20:07:11,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1341313866, now seen corresponding path program 1 times [2024-06-03 20:07:11,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:11,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793018977] [2024-06-03 20:07:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:11,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:12,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:12,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793018977] [2024-06-03 20:07:12,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793018977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:12,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:12,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:12,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904360953] [2024-06-03 20:07:12,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:12,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:12,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:12,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:12,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:07:12,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 161 transitions, 1564 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) [2024-06-03 20:07:12,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:12,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:07:12,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:13,422 INFO L124 PetriNetUnfolderBase]: 1989/2995 cut-off events. [2024-06-03 20:07:13,422 INFO L125 PetriNetUnfolderBase]: For 82199/82306 co-relation queries the response was YES. [2024-06-03 20:07:13,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18936 conditions, 2995 events. 1989/2995 cut-off events. For 82199/82306 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14320 event pairs, 390 based on Foata normal form. 30/2968 useless extension candidates. Maximal degree in co-relation 18868. Up to 2282 conditions per place. [2024-06-03 20:07:13,442 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 125 selfloop transitions, 78 changer transitions 0/226 dead transitions. [2024-06-03 20:07:13,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 226 transitions, 2474 flow [2024-06-03 20:07:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 20:07:13,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-03 20:07:13,443 INFO L175 Difference]: Start difference. First operand has 135 places, 161 transitions, 1564 flow. Second operand 9 states and 181 transitions. [2024-06-03 20:07:13,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 226 transitions, 2474 flow [2024-06-03 20:07:13,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 226 transitions, 2429 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:07:13,531 INFO L231 Difference]: Finished difference. Result has 142 places, 171 transitions, 1869 flow [2024-06-03 20:07:13,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1869, PETRI_PLACES=142, PETRI_TRANSITIONS=171} [2024-06-03 20:07:13,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-03 20:07:13,532 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 171 transitions, 1869 flow [2024-06-03 20:07:13,532 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) [2024-06-03 20:07:13,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:13,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:13,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:07:13,532 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)] === [2024-06-03 20:07:13,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:13,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1341253292, now seen corresponding path program 1 times [2024-06-03 20:07:13,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:13,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756698143] [2024-06-03 20:07:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:13,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:14,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:14,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756698143] [2024-06-03 20:07:14,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756698143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:14,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:14,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610080148] [2024-06-03 20:07:14,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:14,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:14,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:14,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 171 transitions, 1869 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) [2024-06-03 20:07:14,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:14,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:14,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:15,243 INFO L124 PetriNetUnfolderBase]: 2090/3125 cut-off events. [2024-06-03 20:07:15,243 INFO L125 PetriNetUnfolderBase]: For 82298/82300 co-relation queries the response was YES. [2024-06-03 20:07:15,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20629 conditions, 3125 events. 2090/3125 cut-off events. For 82298/82300 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14873 event pairs, 545 based on Foata normal form. 4/3127 useless extension candidates. Maximal degree in co-relation 20559. Up to 2687 conditions per place. [2024-06-03 20:07:15,265 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 173 selfloop transitions, 62 changer transitions 0/238 dead transitions. [2024-06-03 20:07:15,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 238 transitions, 2744 flow [2024-06-03 20:07:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:07:15,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:07:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-03 20:07:15,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-03 20:07:15,267 INFO L175 Difference]: Start difference. First operand has 142 places, 171 transitions, 1869 flow. Second operand 11 states and 190 transitions. [2024-06-03 20:07:15,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 238 transitions, 2744 flow [2024-06-03 20:07:15,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 2680 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:07:15,364 INFO L231 Difference]: Finished difference. Result has 152 places, 184 transitions, 2122 flow [2024-06-03 20:07:15,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2122, PETRI_PLACES=152, PETRI_TRANSITIONS=184} [2024-06-03 20:07:15,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-03 20:07:15,365 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 184 transitions, 2122 flow [2024-06-03 20:07:15,365 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) [2024-06-03 20:07:15,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:15,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:15,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:07:15,365 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)] === [2024-06-03 20:07:15,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1341253416, now seen corresponding path program 2 times [2024-06-03 20:07:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:15,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656158894] [2024-06-03 20:07:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:15,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:16,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:16,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656158894] [2024-06-03 20:07:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656158894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:16,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:16,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:16,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195452706] [2024-06-03 20:07:16,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:16,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:16,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:16,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:16,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:07:16,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 184 transitions, 2122 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) [2024-06-03 20:07:16,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:16,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:07:16,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:17,174 INFO L124 PetriNetUnfolderBase]: 2056/3091 cut-off events. [2024-06-03 20:07:17,174 INFO L125 PetriNetUnfolderBase]: For 96422/96522 co-relation queries the response was YES. [2024-06-03 20:07:17,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21429 conditions, 3091 events. 2056/3091 cut-off events. For 96422/96522 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14948 event pairs, 561 based on Foata normal form. 17/3049 useless extension candidates. Maximal degree in co-relation 21355. Up to 2804 conditions per place. [2024-06-03 20:07:17,199 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 138 selfloop transitions, 63 changer transitions 0/227 dead transitions. [2024-06-03 20:07:17,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 227 transitions, 2656 flow [2024-06-03 20:07:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-03 20:07:17,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-03 20:07:17,201 INFO L175 Difference]: Start difference. First operand has 152 places, 184 transitions, 2122 flow. Second operand 10 states and 174 transitions. [2024-06-03 20:07:17,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 227 transitions, 2656 flow [2024-06-03 20:07:17,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 227 transitions, 2547 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:17,312 INFO L231 Difference]: Finished difference. Result has 156 places, 186 transitions, 2179 flow [2024-06-03 20:07:17,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2179, PETRI_PLACES=156, PETRI_TRANSITIONS=186} [2024-06-03 20:07:17,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-03 20:07:17,313 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 186 transitions, 2179 flow [2024-06-03 20:07:17,313 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) [2024-06-03 20:07:17,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:17,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:17,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:07:17,313 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:17,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1223165736, now seen corresponding path program 3 times [2024-06-03 20:07:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:17,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750307341] [2024-06-03 20:07:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:17,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:18,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:18,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750307341] [2024-06-03 20:07:18,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750307341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:18,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:18,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548546217] [2024-06-03 20:07:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:18,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:18,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:18,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:07:18,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 186 transitions, 2179 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) [2024-06-03 20:07:18,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:18,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:07:18,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:19,141 INFO L124 PetriNetUnfolderBase]: 2113/3190 cut-off events. [2024-06-03 20:07:19,141 INFO L125 PetriNetUnfolderBase]: For 106532/106603 co-relation queries the response was YES. [2024-06-03 20:07:19,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22173 conditions, 3190 events. 2113/3190 cut-off events. For 106532/106603 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15547 event pairs, 569 based on Foata normal form. 18/3148 useless extension candidates. Maximal degree in co-relation 22097. Up to 2843 conditions per place. [2024-06-03 20:07:19,166 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 155 selfloop transitions, 50 changer transitions 0/231 dead transitions. [2024-06-03 20:07:19,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 231 transitions, 2905 flow [2024-06-03 20:07:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:07:19,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-03 20:07:19,168 INFO L175 Difference]: Start difference. First operand has 156 places, 186 transitions, 2179 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:07:19,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 231 transitions, 2905 flow [2024-06-03 20:07:19,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 231 transitions, 2763 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:19,277 INFO L231 Difference]: Finished difference. Result has 157 places, 188 transitions, 2183 flow [2024-06-03 20:07:19,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2183, PETRI_PLACES=157, PETRI_TRANSITIONS=188} [2024-06-03 20:07:19,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-03 20:07:19,278 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 188 transitions, 2183 flow [2024-06-03 20:07:19,278 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) [2024-06-03 20:07:19,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:19,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:19,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:07:19,279 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)] === [2024-06-03 20:07:19,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1222987982, now seen corresponding path program 2 times [2024-06-03 20:07:19,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:19,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604253837] [2024-06-03 20:07:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:20,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604253837] [2024-06-03 20:07:20,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604253837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:20,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:20,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:20,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200311530] [2024-06-03 20:07:20,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:20,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:20,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:20,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:20,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 188 transitions, 2183 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) [2024-06-03 20:07:20,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:20,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:20,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:20,942 INFO L124 PetriNetUnfolderBase]: 2211/3314 cut-off events. [2024-06-03 20:07:20,942 INFO L125 PetriNetUnfolderBase]: For 101574/101576 co-relation queries the response was YES. [2024-06-03 20:07:20,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22751 conditions, 3314 events. 2211/3314 cut-off events. For 101574/101576 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15917 event pairs, 597 based on Foata normal form. 4/3316 useless extension candidates. Maximal degree in co-relation 22674. Up to 3104 conditions per place. [2024-06-03 20:07:20,973 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 191 selfloop transitions, 41 changer transitions 0/235 dead transitions. [2024-06-03 20:07:20,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 235 transitions, 2804 flow [2024-06-03 20:07:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:07:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:07:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-03 20:07:20,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-03 20:07:20,974 INFO L175 Difference]: Start difference. First operand has 157 places, 188 transitions, 2183 flow. Second operand 11 states and 179 transitions. [2024-06-03 20:07:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 235 transitions, 2804 flow [2024-06-03 20:07:21,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 235 transitions, 2694 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:21,115 INFO L231 Difference]: Finished difference. Result has 161 places, 191 transitions, 2202 flow [2024-06-03 20:07:21,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2202, PETRI_PLACES=161, PETRI_TRANSITIONS=191} [2024-06-03 20:07:21,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-03 20:07:21,116 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 191 transitions, 2202 flow [2024-06-03 20:07:21,116 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) [2024-06-03 20:07:21,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:21,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:21,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:07:21,117 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)] === [2024-06-03 20:07:21,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1222981038, now seen corresponding path program 1 times [2024-06-03 20:07:21,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:21,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902651054] [2024-06-03 20:07:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:21,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:22,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:22,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902651054] [2024-06-03 20:07:22,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902651054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:22,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:22,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:22,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313922457] [2024-06-03 20:07:22,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:22,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:22,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:22,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:22,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 191 transitions, 2202 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) [2024-06-03 20:07:22,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:22,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:22,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:22,701 INFO L124 PetriNetUnfolderBase]: 2228/3341 cut-off events. [2024-06-03 20:07:22,701 INFO L125 PetriNetUnfolderBase]: For 107213/107215 co-relation queries the response was YES. [2024-06-03 20:07:22,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22982 conditions, 3341 events. 2228/3341 cut-off events. For 107213/107215 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16048 event pairs, 594 based on Foata normal form. 4/3343 useless extension candidates. Maximal degree in co-relation 22904. Up to 3204 conditions per place. [2024-06-03 20:07:22,729 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 26 changer transitions 0/223 dead transitions. [2024-06-03 20:07:22,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 223 transitions, 2750 flow [2024-06-03 20:07:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:07:22,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:07:22,731 INFO L175 Difference]: Start difference. First operand has 161 places, 191 transitions, 2202 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:07:22,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 223 transitions, 2750 flow [2024-06-03 20:07:22,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 223 transitions, 2654 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 20:07:22,863 INFO L231 Difference]: Finished difference. Result has 160 places, 193 transitions, 2193 flow [2024-06-03 20:07:22,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2193, PETRI_PLACES=160, PETRI_TRANSITIONS=193} [2024-06-03 20:07:22,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-03 20:07:22,863 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 193 transitions, 2193 flow [2024-06-03 20:07:22,864 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) [2024-06-03 20:07:22,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:22,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:22,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:07:22,864 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)] === [2024-06-03 20:07:22,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1223160962, now seen corresponding path program 3 times [2024-06-03 20:07:22,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:22,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766161020] [2024-06-03 20:07:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:22,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:23,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:23,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766161020] [2024-06-03 20:07:23,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766161020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:23,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:23,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:23,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071767100] [2024-06-03 20:07:23,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:23,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:23,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:23,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:23,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:23,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 193 transitions, 2193 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) [2024-06-03 20:07:23,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:23,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:23,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:24,583 INFO L124 PetriNetUnfolderBase]: 2250/3373 cut-off events. [2024-06-03 20:07:24,583 INFO L125 PetriNetUnfolderBase]: For 113999/114001 co-relation queries the response was YES. [2024-06-03 20:07:24,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23441 conditions, 3373 events. 2250/3373 cut-off events. For 113999/114001 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16283 event pairs, 595 based on Foata normal form. 4/3375 useless extension candidates. Maximal degree in co-relation 23362. Up to 3163 conditions per place. [2024-06-03 20:07:24,609 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 189 selfloop transitions, 40 changer transitions 0/232 dead transitions. [2024-06-03 20:07:24,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 232 transitions, 2794 flow [2024-06-03 20:07:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:07:24,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:07:24,611 INFO L175 Difference]: Start difference. First operand has 160 places, 193 transitions, 2193 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:07:24,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 232 transitions, 2794 flow [2024-06-03 20:07:24,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 232 transitions, 2738 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:24,761 INFO L231 Difference]: Finished difference. Result has 164 places, 196 transitions, 2270 flow [2024-06-03 20:07:24,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2270, PETRI_PLACES=164, PETRI_TRANSITIONS=196} [2024-06-03 20:07:24,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-03 20:07:24,761 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 196 transitions, 2270 flow [2024-06-03 20:07:24,762 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) [2024-06-03 20:07:24,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:24,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:24,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:07:24,762 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)] === [2024-06-03 20:07:24,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1223165612, now seen corresponding path program 4 times [2024-06-03 20:07:24,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:24,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823513238] [2024-06-03 20:07:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:24,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823513238] [2024-06-03 20:07:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823513238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:25,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:25,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:25,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918069537] [2024-06-03 20:07:25,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:25,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:25,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:25,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:25,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 196 transitions, 2270 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) [2024-06-03 20:07:25,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:25,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:25,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:26,490 INFO L124 PetriNetUnfolderBase]: 2272/3405 cut-off events. [2024-06-03 20:07:26,490 INFO L125 PetriNetUnfolderBase]: For 121428/121430 co-relation queries the response was YES. [2024-06-03 20:07:26,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23961 conditions, 3405 events. 2272/3405 cut-off events. For 121428/121430 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16441 event pairs, 589 based on Foata normal form. 4/3407 useless extension candidates. Maximal degree in co-relation 23881. Up to 3163 conditions per place. [2024-06-03 20:07:26,521 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 195 selfloop transitions, 44 changer transitions 0/242 dead transitions. [2024-06-03 20:07:26,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 242 transitions, 2934 flow [2024-06-03 20:07:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 20:07:26,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-03 20:07:26,522 INFO L175 Difference]: Start difference. First operand has 164 places, 196 transitions, 2270 flow. Second operand 10 states and 168 transitions. [2024-06-03 20:07:26,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 242 transitions, 2934 flow [2024-06-03 20:07:26,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 242 transitions, 2834 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:26,672 INFO L231 Difference]: Finished difference. Result has 168 places, 201 transitions, 2354 flow [2024-06-03 20:07:26,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2354, PETRI_PLACES=168, PETRI_TRANSITIONS=201} [2024-06-03 20:07:26,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-03 20:07:26,673 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 201 transitions, 2354 flow [2024-06-03 20:07:26,673 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) [2024-06-03 20:07:26,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:26,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:26,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:07:26,673 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)] === [2024-06-03 20:07:26,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:26,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1216153264, now seen corresponding path program 5 times [2024-06-03 20:07:26,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:26,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993818006] [2024-06-03 20:07:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:26,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:27,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:27,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993818006] [2024-06-03 20:07:27,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993818006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:27,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:27,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:27,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363172422] [2024-06-03 20:07:27,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:27,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:27,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:27,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:27,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:27,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:27,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 201 transitions, 2354 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) [2024-06-03 20:07:27,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:27,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:27,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:28,317 INFO L124 PetriNetUnfolderBase]: 2294/3437 cut-off events. [2024-06-03 20:07:28,318 INFO L125 PetriNetUnfolderBase]: For 129033/129035 co-relation queries the response was YES. [2024-06-03 20:07:28,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24477 conditions, 3437 events. 2294/3437 cut-off events. For 129033/129035 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16576 event pairs, 626 based on Foata normal form. 4/3439 useless extension candidates. Maximal degree in co-relation 24395. Up to 3234 conditions per place. [2024-06-03 20:07:28,348 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 199 selfloop transitions, 33 changer transitions 0/235 dead transitions. [2024-06-03 20:07:28,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 235 transitions, 2959 flow [2024-06-03 20:07:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:07:28,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-03 20:07:28,350 INFO L175 Difference]: Start difference. First operand has 168 places, 201 transitions, 2354 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:07:28,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 235 transitions, 2959 flow [2024-06-03 20:07:28,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 235 transitions, 2889 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:28,508 INFO L231 Difference]: Finished difference. Result has 170 places, 204 transitions, 2415 flow [2024-06-03 20:07:28,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2415, PETRI_PLACES=170, PETRI_TRANSITIONS=204} [2024-06-03 20:07:28,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-03 20:07:28,509 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 204 transitions, 2415 flow [2024-06-03 20:07:28,509 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) [2024-06-03 20:07:28,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:28,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:28,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:07:28,509 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)] === [2024-06-03 20:07:28,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:28,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1216160208, now seen corresponding path program 2 times [2024-06-03 20:07:28,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:28,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857435131] [2024-06-03 20:07:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:28,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:29,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:29,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857435131] [2024-06-03 20:07:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857435131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:29,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:29,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:29,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534757001] [2024-06-03 20:07:29,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:29,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:29,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:29,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:29,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:29,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 204 transitions, 2415 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) [2024-06-03 20:07:29,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:29,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:29,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:30,229 INFO L124 PetriNetUnfolderBase]: 2311/3464 cut-off events. [2024-06-03 20:07:30,229 INFO L125 PetriNetUnfolderBase]: For 136316/136318 co-relation queries the response was YES. [2024-06-03 20:07:30,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24925 conditions, 3464 events. 2311/3464 cut-off events. For 136316/136318 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16728 event pairs, 599 based on Foata normal form. 4/3466 useless extension candidates. Maximal degree in co-relation 24841. Up to 3309 conditions per place. [2024-06-03 20:07:30,255 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 201 selfloop transitions, 28 changer transitions 0/232 dead transitions. [2024-06-03 20:07:30,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 232 transitions, 2975 flow [2024-06-03 20:07:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 20:07:30,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:07:30,257 INFO L175 Difference]: Start difference. First operand has 170 places, 204 transitions, 2415 flow. Second operand 7 states and 119 transitions. [2024-06-03 20:07:30,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 232 transitions, 2975 flow [2024-06-03 20:07:30,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 232 transitions, 2877 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:30,439 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 2415 flow [2024-06-03 20:07:30,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2415, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-03 20:07:30,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-03 20:07:30,440 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 2415 flow [2024-06-03 20:07:30,440 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) [2024-06-03 20:07:30,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:30,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:30,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:07:30,440 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:30,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash 515723480, now seen corresponding path program 4 times [2024-06-03 20:07:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:30,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404468305] [2024-06-03 20:07:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:31,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:31,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404468305] [2024-06-03 20:07:31,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404468305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:31,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:31,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:31,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873025340] [2024-06-03 20:07:31,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:31,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:31,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:31,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:31,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:07:31,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 2415 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) [2024-06-03 20:07:31,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:31,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:07:31,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:32,108 INFO L124 PetriNetUnfolderBase]: 2220/3351 cut-off events. [2024-06-03 20:07:32,108 INFO L125 PetriNetUnfolderBase]: For 150889/150976 co-relation queries the response was YES. [2024-06-03 20:07:32,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24749 conditions, 3351 events. 2220/3351 cut-off events. For 150889/150976 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16373 event pairs, 479 based on Foata normal form. 15/3307 useless extension candidates. Maximal degree in co-relation 24664. Up to 3072 conditions per place. [2024-06-03 20:07:32,139 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 165 selfloop transitions, 43 changer transitions 0/241 dead transitions. [2024-06-03 20:07:32,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 241 transitions, 2941 flow [2024-06-03 20:07:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:07:32,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 20:07:32,141 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 2415 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:07:32,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 241 transitions, 2941 flow [2024-06-03 20:07:32,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 241 transitions, 2863 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:32,346 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 2465 flow [2024-06-03 20:07:32,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2465, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-06-03 20:07:32,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-03 20:07:32,346 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 2465 flow [2024-06-03 20:07:32,347 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) [2024-06-03 20:07:32,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:32,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:32,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:07:32,347 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)] === [2024-06-03 20:07:32,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash 515728254, now seen corresponding path program 6 times [2024-06-03 20:07:32,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:32,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871013320] [2024-06-03 20:07:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:32,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:33,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871013320] [2024-06-03 20:07:33,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871013320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:33,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:33,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:33,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411296432] [2024-06-03 20:07:33,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:33,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:33,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:33,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:33,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:33,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:33,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 2465 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) [2024-06-03 20:07:33,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:33,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:33,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:33,989 INFO L124 PetriNetUnfolderBase]: 2320/3477 cut-off events. [2024-06-03 20:07:33,990 INFO L125 PetriNetUnfolderBase]: For 140811/140813 co-relation queries the response was YES. [2024-06-03 20:07:34,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25042 conditions, 3477 events. 2320/3477 cut-off events. For 140811/140813 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16771 event pairs, 621 based on Foata normal form. 4/3479 useless extension candidates. Maximal degree in co-relation 24956. Up to 3274 conditions per place. [2024-06-03 20:07:34,020 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 207 selfloop transitions, 35 changer transitions 0/245 dead transitions. [2024-06-03 20:07:34,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 3104 flow [2024-06-03 20:07:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:07:34,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:07:34,022 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 2465 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:07:34,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 3104 flow [2024-06-03 20:07:34,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 245 transitions, 2996 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:34,212 INFO L231 Difference]: Finished difference. Result has 176 places, 211 transitions, 2498 flow [2024-06-03 20:07:34,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2498, PETRI_PLACES=176, PETRI_TRANSITIONS=211} [2024-06-03 20:07:34,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-03 20:07:34,213 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 211 transitions, 2498 flow [2024-06-03 20:07:34,213 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) [2024-06-03 20:07:34,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:34,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:34,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:07:34,214 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)] === [2024-06-03 20:07:34,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:34,214 INFO L85 PathProgramCache]: Analyzing trace with hash 522403298, now seen corresponding path program 3 times [2024-06-03 20:07:34,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:34,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892643913] [2024-06-03 20:07:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:34,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:35,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:35,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892643913] [2024-06-03 20:07:35,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892643913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:35,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:35,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:35,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246821818] [2024-06-03 20:07:35,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:35,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:35,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:35,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:35,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:35,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:35,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 211 transitions, 2498 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) [2024-06-03 20:07:35,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:35,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:35,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:35,835 INFO L124 PetriNetUnfolderBase]: 2337/3504 cut-off events. [2024-06-03 20:07:35,835 INFO L125 PetriNetUnfolderBase]: For 148096/148098 co-relation queries the response was YES. [2024-06-03 20:07:35,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25355 conditions, 3504 events. 2337/3504 cut-off events. For 148096/148098 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16930 event pairs, 617 based on Foata normal form. 6/3508 useless extension candidates. Maximal degree in co-relation 25268. Up to 3422 conditions per place. [2024-06-03 20:07:35,862 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 217 selfloop transitions, 15 changer transitions 0/235 dead transitions. [2024-06-03 20:07:35,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 3050 flow [2024-06-03 20:07:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 20:07:35,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:07:35,863 INFO L175 Difference]: Start difference. First operand has 176 places, 211 transitions, 2498 flow. Second operand 7 states and 112 transitions. [2024-06-03 20:07:35,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 3050 flow [2024-06-03 20:07:36,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 235 transitions, 2942 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:36,042 INFO L231 Difference]: Finished difference. Result has 177 places, 213 transitions, 2459 flow [2024-06-03 20:07:36,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2459, PETRI_PLACES=177, PETRI_TRANSITIONS=213} [2024-06-03 20:07:36,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-03 20:07:36,043 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 213 transitions, 2459 flow [2024-06-03 20:07:36,043 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) [2024-06-03 20:07:36,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:36,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:36,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:07:36,043 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)] === [2024-06-03 20:07:36,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1215975634, now seen corresponding path program 7 times [2024-06-03 20:07:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:36,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448848735] [2024-06-03 20:07:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:36,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448848735] [2024-06-03 20:07:36,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448848735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:36,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:36,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:36,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709417830] [2024-06-03 20:07:36,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:36,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:36,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:37,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:37,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 213 transitions, 2459 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) [2024-06-03 20:07:37,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:37,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:37,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:37,836 INFO L124 PetriNetUnfolderBase]: 2359/3536 cut-off events. [2024-06-03 20:07:37,836 INFO L125 PetriNetUnfolderBase]: For 156255/156257 co-relation queries the response was YES. [2024-06-03 20:07:37,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25757 conditions, 3536 events. 2359/3536 cut-off events. For 156255/156257 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17038 event pairs, 619 based on Foata normal form. 4/3538 useless extension candidates. Maximal degree in co-relation 25669. Up to 3239 conditions per place. [2024-06-03 20:07:37,870 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 210 selfloop transitions, 48 changer transitions 0/261 dead transitions. [2024-06-03 20:07:37,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 261 transitions, 3311 flow [2024-06-03 20:07:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:07:37,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:07:37,871 INFO L175 Difference]: Start difference. First operand has 177 places, 213 transitions, 2459 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:07:37,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 261 transitions, 3311 flow [2024-06-03 20:07:38,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 261 transitions, 3260 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:38,098 INFO L231 Difference]: Finished difference. Result has 182 places, 217 transitions, 2604 flow [2024-06-03 20:07:38,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2604, PETRI_PLACES=182, PETRI_TRANSITIONS=217} [2024-06-03 20:07:38,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-03 20:07:38,098 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 217 transitions, 2604 flow [2024-06-03 20:07:38,099 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) [2024-06-03 20:07:38,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:38,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:07:38,099 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)] === [2024-06-03 20:07:38,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:38,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1452335568, now seen corresponding path program 4 times [2024-06-03 20:07:38,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:38,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280261947] [2024-06-03 20:07:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:38,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280261947] [2024-06-03 20:07:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280261947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:38,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:38,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:38,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828052443] [2024-06-03 20:07:38,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:38,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:38,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:38,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:39,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:39,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 217 transitions, 2604 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) [2024-06-03 20:07:39,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:39,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:39,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:39,728 INFO L124 PetriNetUnfolderBase]: 2351/3524 cut-off events. [2024-06-03 20:07:39,728 INFO L125 PetriNetUnfolderBase]: For 161768/161770 co-relation queries the response was YES. [2024-06-03 20:07:39,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26027 conditions, 3524 events. 2351/3524 cut-off events. For 161768/161770 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16973 event pairs, 635 based on Foata normal form. 6/3528 useless extension candidates. Maximal degree in co-relation 25937. Up to 3433 conditions per place. [2024-06-03 20:07:39,760 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 219 selfloop transitions, 19 changer transitions 0/241 dead transitions. [2024-06-03 20:07:39,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 241 transitions, 3174 flow [2024-06-03 20:07:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 20:07:39,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-03 20:07:39,762 INFO L175 Difference]: Start difference. First operand has 182 places, 217 transitions, 2604 flow. Second operand 7 states and 113 transitions. [2024-06-03 20:07:39,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 241 transitions, 3174 flow [2024-06-03 20:07:39,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 241 transitions, 2990 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:39,996 INFO L231 Difference]: Finished difference. Result has 181 places, 219 transitions, 2502 flow [2024-06-03 20:07:39,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2502, PETRI_PLACES=181, PETRI_TRANSITIONS=219} [2024-06-03 20:07:39,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-03 20:07:39,996 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 219 transitions, 2502 flow [2024-06-03 20:07:39,997 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) [2024-06-03 20:07:39,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:39,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:39,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:07:39,997 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)] === [2024-06-03 20:07:39,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1444054414, now seen corresponding path program 8 times [2024-06-03 20:07:39,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:39,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171699162] [2024-06-03 20:07:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:39,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:40,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:40,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171699162] [2024-06-03 20:07:40,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171699162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:40,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:40,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:40,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043530585] [2024-06-03 20:07:40,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:40,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:40,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:40,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:40,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:40,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 219 transitions, 2502 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) [2024-06-03 20:07:40,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:40,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:40,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:41,786 INFO L124 PetriNetUnfolderBase]: 2341/3510 cut-off events. [2024-06-03 20:07:41,787 INFO L125 PetriNetUnfolderBase]: For 166230/166232 co-relation queries the response was YES. [2024-06-03 20:07:41,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25586 conditions, 3510 events. 2341/3510 cut-off events. For 166230/166232 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16923 event pairs, 628 based on Foata normal form. 6/3514 useless extension candidates. Maximal degree in co-relation 25496. Up to 3414 conditions per place. [2024-06-03 20:07:41,815 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 226 selfloop transitions, 18 changer transitions 0/247 dead transitions. [2024-06-03 20:07:41,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 247 transitions, 3086 flow [2024-06-03 20:07:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:07:41,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:07:41,817 INFO L175 Difference]: Start difference. First operand has 181 places, 219 transitions, 2502 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:07:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 247 transitions, 3086 flow [2024-06-03 20:07:42,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 2982 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:42,048 INFO L231 Difference]: Finished difference. Result has 184 places, 220 transitions, 2462 flow [2024-06-03 20:07:42,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2462, PETRI_PLACES=184, PETRI_TRANSITIONS=220} [2024-06-03 20:07:42,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-03 20:07:42,049 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 220 transitions, 2462 flow [2024-06-03 20:07:42,049 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) [2024-06-03 20:07:42,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:42,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:42,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:07:42,050 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)] === [2024-06-03 20:07:42,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1452335320, now seen corresponding path program 1 times [2024-06-03 20:07:42,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:42,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616914155] [2024-06-03 20:07:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:42,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:42,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:42,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616914155] [2024-06-03 20:07:42,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616914155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:42,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:42,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:42,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090333773] [2024-06-03 20:07:42,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:42,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:42,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:42,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:43,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:43,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 220 transitions, 2462 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) [2024-06-03 20:07:43,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:43,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:43,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:43,795 INFO L124 PetriNetUnfolderBase]: 2336/3503 cut-off events. [2024-06-03 20:07:43,795 INFO L125 PetriNetUnfolderBase]: For 170862/170864 co-relation queries the response was YES. [2024-06-03 20:07:43,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25504 conditions, 3503 events. 2336/3503 cut-off events. For 170862/170864 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16914 event pairs, 617 based on Foata normal form. 4/3505 useless extension candidates. Maximal degree in co-relation 25413. Up to 3403 conditions per place. [2024-06-03 20:07:43,829 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 23 changer transitions 0/245 dead transitions. [2024-06-03 20:07:43,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 245 transitions, 3052 flow [2024-06-03 20:07:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:07:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:07:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 20:07:43,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 20:07:43,830 INFO L175 Difference]: Start difference. First operand has 184 places, 220 transitions, 2462 flow. Second operand 7 states and 114 transitions. [2024-06-03 20:07:43,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 245 transitions, 3052 flow [2024-06-03 20:07:44,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 245 transitions, 2998 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:44,074 INFO L231 Difference]: Finished difference. Result has 185 places, 223 transitions, 2514 flow [2024-06-03 20:07:44,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2514, PETRI_PLACES=185, PETRI_TRANSITIONS=223} [2024-06-03 20:07:44,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-03 20:07:44,075 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 223 transitions, 2514 flow [2024-06-03 20:07:44,075 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) [2024-06-03 20:07:44,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:44,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:44,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:07:44,075 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:44,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:44,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1197765146, now seen corresponding path program 1 times [2024-06-03 20:07:44,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:44,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105493227] [2024-06-03 20:07:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:44,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:45,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:45,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105493227] [2024-06-03 20:07:45,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105493227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:45,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:45,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159908064] [2024-06-03 20:07:45,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:45,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:45,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:45,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 223 transitions, 2514 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) [2024-06-03 20:07:45,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:45,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:45,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:46,077 INFO L124 PetriNetUnfolderBase]: 2455/3704 cut-off events. [2024-06-03 20:07:46,078 INFO L125 PetriNetUnfolderBase]: For 182226/182228 co-relation queries the response was YES. [2024-06-03 20:07:46,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26917 conditions, 3704 events. 2455/3704 cut-off events. For 182226/182228 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18236 event pairs, 400 based on Foata normal form. 16/3718 useless extension candidates. Maximal degree in co-relation 26825. Up to 2642 conditions per place. [2024-06-03 20:07:46,114 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 195 selfloop transitions, 94 changer transitions 0/292 dead transitions. [2024-06-03 20:07:46,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 292 transitions, 3735 flow [2024-06-03 20:07:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-03 20:07:46,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-03 20:07:46,115 INFO L175 Difference]: Start difference. First operand has 185 places, 223 transitions, 2514 flow. Second operand 10 states and 184 transitions. [2024-06-03 20:07:46,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 292 transitions, 3735 flow [2024-06-03 20:07:46,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 292 transitions, 3671 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:46,371 INFO L231 Difference]: Finished difference. Result has 193 places, 231 transitions, 2861 flow [2024-06-03 20:07:46,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2861, PETRI_PLACES=193, PETRI_TRANSITIONS=231} [2024-06-03 20:07:46,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-03 20:07:46,372 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 231 transitions, 2861 flow [2024-06-03 20:07:46,372 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) [2024-06-03 20:07:46,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:46,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:46,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:07:46,373 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:46,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1199639096, now seen corresponding path program 2 times [2024-06-03 20:07:46,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:46,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676547002] [2024-06-03 20:07:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:46,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:47,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:47,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676547002] [2024-06-03 20:07:47,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676547002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:47,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:47,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314783522] [2024-06-03 20:07:47,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:47,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:47,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:47,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:47,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:47,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 231 transitions, 2861 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) [2024-06-03 20:07:47,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:47,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:47,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:48,478 INFO L124 PetriNetUnfolderBase]: 2674/4058 cut-off events. [2024-06-03 20:07:48,478 INFO L125 PetriNetUnfolderBase]: For 210780/210782 co-relation queries the response was YES. [2024-06-03 20:07:48,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30765 conditions, 4058 events. 2674/4058 cut-off events. For 210780/210782 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20769 event pairs, 595 based on Foata normal form. 16/4072 useless extension candidates. Maximal degree in co-relation 30669. Up to 3212 conditions per place. [2024-06-03 20:07:48,517 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 197 selfloop transitions, 98 changer transitions 0/298 dead transitions. [2024-06-03 20:07:48,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 298 transitions, 4072 flow [2024-06-03 20:07:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-03 20:07:48,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-03 20:07:48,518 INFO L175 Difference]: Start difference. First operand has 193 places, 231 transitions, 2861 flow. Second operand 10 states and 185 transitions. [2024-06-03 20:07:48,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 298 transitions, 4072 flow [2024-06-03 20:07:48,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 298 transitions, 3944 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:48,841 INFO L231 Difference]: Finished difference. Result has 199 places, 239 transitions, 3051 flow [2024-06-03 20:07:48,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3051, PETRI_PLACES=199, PETRI_TRANSITIONS=239} [2024-06-03 20:07:48,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-03 20:07:48,842 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 239 transitions, 3051 flow [2024-06-03 20:07:48,842 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) [2024-06-03 20:07:48,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:48,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:48,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:07:48,842 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:48,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:48,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1370821664, now seen corresponding path program 3 times [2024-06-03 20:07:48,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:48,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746737327] [2024-06-03 20:07:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:48,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:49,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:49,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746737327] [2024-06-03 20:07:49,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746737327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:49,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:49,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:49,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668143713] [2024-06-03 20:07:49,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:49,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:49,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:49,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:49,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:49,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:49,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 239 transitions, 3051 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) [2024-06-03 20:07:49,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:49,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:49,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:50,675 INFO L124 PetriNetUnfolderBase]: 2638/4002 cut-off events. [2024-06-03 20:07:50,675 INFO L125 PetriNetUnfolderBase]: For 208509/208511 co-relation queries the response was YES. [2024-06-03 20:07:50,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30225 conditions, 4002 events. 2638/4002 cut-off events. For 208509/208511 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20361 event pairs, 599 based on Foata normal form. 20/4020 useless extension candidates. Maximal degree in co-relation 30127. Up to 3312 conditions per place. [2024-06-03 20:07:50,713 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 193 selfloop transitions, 97 changer transitions 0/293 dead transitions. [2024-06-03 20:07:50,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 293 transitions, 3995 flow [2024-06-03 20:07:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-03 20:07:50,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-03 20:07:50,715 INFO L175 Difference]: Start difference. First operand has 199 places, 239 transitions, 3051 flow. Second operand 10 states and 179 transitions. [2024-06-03 20:07:50,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 293 transitions, 3995 flow [2024-06-03 20:07:50,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 293 transitions, 3854 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:50,956 INFO L231 Difference]: Finished difference. Result has 205 places, 241 transitions, 3157 flow [2024-06-03 20:07:50,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3157, PETRI_PLACES=205, PETRI_TRANSITIONS=241} [2024-06-03 20:07:50,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-03 20:07:50,957 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 241 transitions, 3157 flow [2024-06-03 20:07:50,957 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) [2024-06-03 20:07:50,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:50,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:50,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:07:50,957 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)] === [2024-06-03 20:07:50,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1457657624, now seen corresponding path program 4 times [2024-06-03 20:07:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:50,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277210008] [2024-06-03 20:07:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:51,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:51,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277210008] [2024-06-03 20:07:51,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277210008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:51,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:51,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:51,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085727915] [2024-06-03 20:07:51,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:51,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:51,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:51,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:51,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:52,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:52,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 241 transitions, 3157 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) [2024-06-03 20:07:52,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:52,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:52,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:52,885 INFO L124 PetriNetUnfolderBase]: 2735/4159 cut-off events. [2024-06-03 20:07:52,885 INFO L125 PetriNetUnfolderBase]: For 218351/218353 co-relation queries the response was YES. [2024-06-03 20:07:52,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31552 conditions, 4159 events. 2735/4159 cut-off events. For 218351/218353 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21473 event pairs, 650 based on Foata normal form. 20/4177 useless extension candidates. Maximal degree in co-relation 31451. Up to 3705 conditions per place. [2024-06-03 20:07:52,923 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 228 selfloop transitions, 61 changer transitions 0/292 dead transitions. [2024-06-03 20:07:52,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 292 transitions, 3953 flow [2024-06-03 20:07:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-03 20:07:52,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-03 20:07:52,925 INFO L175 Difference]: Start difference. First operand has 205 places, 241 transitions, 3157 flow. Second operand 10 states and 172 transitions. [2024-06-03 20:07:52,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 292 transitions, 3953 flow [2024-06-03 20:07:53,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 292 transitions, 3758 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:53,328 INFO L231 Difference]: Finished difference. Result has 209 places, 245 transitions, 3163 flow [2024-06-03 20:07:53,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3163, PETRI_PLACES=209, PETRI_TRANSITIONS=245} [2024-06-03 20:07:53,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-03 20:07:53,329 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 245 transitions, 3163 flow [2024-06-03 20:07:53,329 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) [2024-06-03 20:07:53,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:53,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:53,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:07:53,329 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)] === [2024-06-03 20:07:53,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1457663576, now seen corresponding path program 1 times [2024-06-03 20:07:53,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:53,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687733621] [2024-06-03 20:07:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:53,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:54,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:54,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687733621] [2024-06-03 20:07:54,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687733621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:54,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:54,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:54,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266632428] [2024-06-03 20:07:54,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:54,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:54,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:54,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 245 transitions, 3163 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) [2024-06-03 20:07:54,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:54,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:54,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:55,260 INFO L124 PetriNetUnfolderBase]: 2752/4186 cut-off events. [2024-06-03 20:07:55,260 INFO L125 PetriNetUnfolderBase]: For 215888/215890 co-relation queries the response was YES. [2024-06-03 20:07:55,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31818 conditions, 4186 events. 2752/4186 cut-off events. For 215888/215890 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21705 event pairs, 633 based on Foata normal form. 4/4188 useless extension candidates. Maximal degree in co-relation 31715. Up to 3884 conditions per place. [2024-06-03 20:07:55,300 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 51 changer transitions 0/285 dead transitions. [2024-06-03 20:07:55,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 285 transitions, 3867 flow [2024-06-03 20:07:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:07:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:07:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:07:55,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:07:55,302 INFO L175 Difference]: Start difference. First operand has 209 places, 245 transitions, 3163 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:07:55,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 285 transitions, 3867 flow [2024-06-03 20:07:55,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 285 transitions, 3742 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:55,699 INFO L231 Difference]: Finished difference. Result has 211 places, 247 transitions, 3185 flow [2024-06-03 20:07:55,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3185, PETRI_PLACES=211, PETRI_TRANSITIONS=247} [2024-06-03 20:07:55,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-03 20:07:55,700 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 247 transitions, 3185 flow [2024-06-03 20:07:55,700 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) [2024-06-03 20:07:55,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:55,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:55,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:07:55,700 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)] === [2024-06-03 20:07:55,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:55,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1457513474, now seen corresponding path program 5 times [2024-06-03 20:07:55,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:55,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005199850] [2024-06-03 20:07:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:56,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:56,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005199850] [2024-06-03 20:07:56,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005199850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:56,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:56,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:56,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80550183] [2024-06-03 20:07:56,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:56,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:56,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:56,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:56,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:56,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:56,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 247 transitions, 3185 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) [2024-06-03 20:07:56,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:56,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:56,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:57,711 INFO L124 PetriNetUnfolderBase]: 2827/4311 cut-off events. [2024-06-03 20:07:57,711 INFO L125 PetriNetUnfolderBase]: For 239670/239672 co-relation queries the response was YES. [2024-06-03 20:07:57,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32710 conditions, 4311 events. 2827/4311 cut-off events. For 239670/239672 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22512 event pairs, 654 based on Foata normal form. 20/4329 useless extension candidates. Maximal degree in co-relation 32606. Up to 3830 conditions per place. [2024-06-03 20:07:57,754 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 66 changer transitions 0/296 dead transitions. [2024-06-03 20:07:57,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 296 transitions, 3960 flow [2024-06-03 20:07:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:07:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:07:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 20:07:57,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:07:57,755 INFO L175 Difference]: Start difference. First operand has 211 places, 247 transitions, 3185 flow. Second operand 10 states and 175 transitions. [2024-06-03 20:07:57,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 296 transitions, 3960 flow [2024-06-03 20:07:58,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 296 transitions, 3831 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:58,184 INFO L231 Difference]: Finished difference. Result has 214 places, 248 transitions, 3224 flow [2024-06-03 20:07:58,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3224, PETRI_PLACES=214, PETRI_TRANSITIONS=248} [2024-06-03 20:07:58,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-03 20:07:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 248 transitions, 3224 flow [2024-06-03 20:07:58,185 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) [2024-06-03 20:07:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:58,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:07:58,185 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)] === [2024-06-03 20:07:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1286330906, now seen corresponding path program 6 times [2024-06-03 20:07:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334243912] [2024-06-03 20:07:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:58,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:59,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:59,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334243912] [2024-06-03 20:07:59,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334243912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:59,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:59,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:07:59,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259687750] [2024-06-03 20:07:59,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:59,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:07:59,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:07:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:07:59,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:07:59,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 248 transitions, 3224 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) [2024-06-03 20:07:59,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:59,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:07:59,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:00,213 INFO L124 PetriNetUnfolderBase]: 2946/4512 cut-off events. [2024-06-03 20:08:00,213 INFO L125 PetriNetUnfolderBase]: For 260358/260360 co-relation queries the response was YES. [2024-06-03 20:08:00,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34538 conditions, 4512 events. 2946/4512 cut-off events. For 260358/260360 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23966 event pairs, 681 based on Foata normal form. 16/4526 useless extension candidates. Maximal degree in co-relation 34433. Up to 3715 conditions per place. [2024-06-03 20:08:00,257 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 239 selfloop transitions, 63 changer transitions 0/305 dead transitions. [2024-06-03 20:08:00,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 305 transitions, 4276 flow [2024-06-03 20:08:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:08:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:08:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-03 20:08:00,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-03 20:08:00,258 INFO L175 Difference]: Start difference. First operand has 214 places, 248 transitions, 3224 flow. Second operand 10 states and 179 transitions. [2024-06-03 20:08:00,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 305 transitions, 4276 flow [2024-06-03 20:08:00,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 305 transitions, 4119 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:08:00,642 INFO L231 Difference]: Finished difference. Result has 216 places, 252 transitions, 3307 flow [2024-06-03 20:08:00,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3307, PETRI_PLACES=216, PETRI_TRANSITIONS=252} [2024-06-03 20:08:00,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-03 20:08:00,643 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 252 transitions, 3307 flow [2024-06-03 20:08:00,643 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) [2024-06-03 20:08:00,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:00,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:00,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:08:00,644 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)] === [2024-06-03 20:08:00,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash 736568728, now seen corresponding path program 7 times [2024-06-03 20:08:00,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165977125] [2024-06-03 20:08:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:01,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:01,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165977125] [2024-06-03 20:08:01,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165977125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:01,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:01,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257790059] [2024-06-03 20:08:01,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:01,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:01,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:01,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:01,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:01,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 252 transitions, 3307 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) [2024-06-03 20:08:01,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:01,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:01,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:02,857 INFO L124 PetriNetUnfolderBase]: 3201/4933 cut-off events. [2024-06-03 20:08:02,857 INFO L125 PetriNetUnfolderBase]: For 310460/310462 co-relation queries the response was YES. [2024-06-03 20:08:02,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38734 conditions, 4933 events. 3201/4933 cut-off events. For 310460/310462 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27034 event pairs, 800 based on Foata normal form. 16/4947 useless extension candidates. Maximal degree in co-relation 38629. Up to 4257 conditions per place. [2024-06-03 20:08:02,902 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 258 selfloop transitions, 46 changer transitions 0/307 dead transitions. [2024-06-03 20:08:02,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 307 transitions, 4381 flow [2024-06-03 20:08:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:08:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:08:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 20:08:02,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:08:02,903 INFO L175 Difference]: Start difference. First operand has 216 places, 252 transitions, 3307 flow. Second operand 10 states and 175 transitions. [2024-06-03 20:08:02,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 307 transitions, 4381 flow [2024-06-03 20:08:03,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 307 transitions, 4294 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:03,394 INFO L231 Difference]: Finished difference. Result has 221 places, 256 transitions, 3434 flow [2024-06-03 20:08:03,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3220, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3434, PETRI_PLACES=221, PETRI_TRANSITIONS=256} [2024-06-03 20:08:03,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 20:08:03,395 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 256 transitions, 3434 flow [2024-06-03 20:08:03,395 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) [2024-06-03 20:08:03,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:03,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:03,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:08:03,396 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)] === [2024-06-03 20:08:03,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash 742286740, now seen corresponding path program 2 times [2024-06-03 20:08:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:03,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056496587] [2024-06-03 20:08:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:03,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:04,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056496587] [2024-06-03 20:08:04,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056496587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:04,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:04,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:04,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887508046] [2024-06-03 20:08:04,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:04,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:04,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:04,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:04,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 256 transitions, 3434 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) [2024-06-03 20:08:04,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:04,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:04,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:05,629 INFO L124 PetriNetUnfolderBase]: 3218/4960 cut-off events. [2024-06-03 20:08:05,629 INFO L125 PetriNetUnfolderBase]: For 312545/312547 co-relation queries the response was YES. [2024-06-03 20:08:05,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39453 conditions, 4960 events. 3218/4960 cut-off events. For 312545/312547 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27233 event pairs, 827 based on Foata normal form. 4/4962 useless extension candidates. Maximal degree in co-relation 39345. Up to 4773 conditions per place. [2024-06-03 20:08:05,680 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 264 selfloop transitions, 35 changer transitions 0/302 dead transitions. [2024-06-03 20:08:05,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 302 transitions, 4197 flow [2024-06-03 20:08:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:08:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:08:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-03 20:08:05,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-03 20:08:05,681 INFO L175 Difference]: Start difference. First operand has 221 places, 256 transitions, 3434 flow. Second operand 11 states and 177 transitions. [2024-06-03 20:08:05,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 302 transitions, 4197 flow [2024-06-03 20:08:06,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 302 transitions, 4119 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:06,356 INFO L231 Difference]: Finished difference. Result has 226 places, 258 transitions, 3480 flow [2024-06-03 20:08:06,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3480, PETRI_PLACES=226, PETRI_TRANSITIONS=258} [2024-06-03 20:08:06,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-03 20:08:06,357 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 258 transitions, 3480 flow [2024-06-03 20:08:06,357 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) [2024-06-03 20:08:06,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:06,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:06,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:08:06,358 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)] === [2024-06-03 20:08:06,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash 742078978, now seen corresponding path program 8 times [2024-06-03 20:08:06,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:06,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838504514] [2024-06-03 20:08:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:07,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:07,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838504514] [2024-06-03 20:08:07,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838504514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:07,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:07,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355423091] [2024-06-03 20:08:07,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:07,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:07,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:07,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 258 transitions, 3480 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) [2024-06-03 20:08:07,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:07,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:07,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:08,652 INFO L124 PetriNetUnfolderBase]: 3293/5085 cut-off events. [2024-06-03 20:08:08,652 INFO L125 PetriNetUnfolderBase]: For 340821/340823 co-relation queries the response was YES. [2024-06-03 20:08:08,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40466 conditions, 5085 events. 3293/5085 cut-off events. For 340821/340823 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28145 event pairs, 846 based on Foata normal form. 20/5103 useless extension candidates. Maximal degree in co-relation 40356. Up to 4755 conditions per place. [2024-06-03 20:08:08,697 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 42 changer transitions 0/312 dead transitions. [2024-06-03 20:08:08,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 312 transitions, 4302 flow [2024-06-03 20:08:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:08:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:08:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-03 20:08:08,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:08:08,698 INFO L175 Difference]: Start difference. First operand has 226 places, 258 transitions, 3480 flow. Second operand 12 states and 196 transitions. [2024-06-03 20:08:08,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 312 transitions, 4302 flow [2024-06-03 20:08:09,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 312 transitions, 4201 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-03 20:08:09,262 INFO L231 Difference]: Finished difference. Result has 229 places, 259 transitions, 3502 flow [2024-06-03 20:08:09,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3379, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3502, PETRI_PLACES=229, PETRI_TRANSITIONS=259} [2024-06-03 20:08:09,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-03 20:08:09,263 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 259 transitions, 3502 flow [2024-06-03 20:08:09,263 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) [2024-06-03 20:08:09,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:09,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:09,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:08:09,263 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)] === [2024-06-03 20:08:09,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:09,263 INFO L85 PathProgramCache]: Analyzing trace with hash 571115332, now seen corresponding path program 3 times [2024-06-03 20:08:09,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:09,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607821988] [2024-06-03 20:08:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:09,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:10,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:10,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607821988] [2024-06-03 20:08:10,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607821988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:10,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:10,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:10,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798755131] [2024-06-03 20:08:10,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:10,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:10,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:10,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:10,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:10,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 259 transitions, 3502 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) [2024-06-03 20:08:10,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:10,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:10,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:11,510 INFO L124 PetriNetUnfolderBase]: 3310/5112 cut-off events. [2024-06-03 20:08:11,510 INFO L125 PetriNetUnfolderBase]: For 338467/338469 co-relation queries the response was YES. [2024-06-03 20:08:11,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40912 conditions, 5112 events. 3310/5112 cut-off events. For 338467/338469 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28368 event pairs, 830 based on Foata normal form. 4/5114 useless extension candidates. Maximal degree in co-relation 40801. Up to 4860 conditions per place. [2024-06-03 20:08:11,563 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 265 selfloop transitions, 41 changer transitions 0/309 dead transitions. [2024-06-03 20:08:11,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 309 transitions, 4515 flow [2024-06-03 20:08:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:08:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:08:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-03 20:08:11,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-03 20:08:11,564 INFO L175 Difference]: Start difference. First operand has 229 places, 259 transitions, 3502 flow. Second operand 11 states and 179 transitions. [2024-06-03 20:08:11,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 309 transitions, 4515 flow [2024-06-03 20:08:12,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 309 transitions, 4422 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 20:08:12,111 INFO L231 Difference]: Finished difference. Result has 231 places, 263 transitions, 3602 flow [2024-06-03 20:08:12,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3602, PETRI_PLACES=231, PETRI_TRANSITIONS=263} [2024-06-03 20:08:12,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-03 20:08:12,112 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 263 transitions, 3602 flow [2024-06-03 20:08:12,112 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) [2024-06-03 20:08:12,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:12,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:12,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:08:12,112 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:12,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash 565543702, now seen corresponding path program 4 times [2024-06-03 20:08:12,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:12,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675918544] [2024-06-03 20:08:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:12,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:13,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:13,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675918544] [2024-06-03 20:08:13,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675918544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:13,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:13,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476337722] [2024-06-03 20:08:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:13,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:13,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:13,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:13,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 263 transitions, 3602 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) [2024-06-03 20:08:13,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:13,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:14,271 INFO L124 PetriNetUnfolderBase]: 3302/5100 cut-off events. [2024-06-03 20:08:14,271 INFO L125 PetriNetUnfolderBase]: For 346098/346100 co-relation queries the response was YES. [2024-06-03 20:08:14,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40985 conditions, 5100 events. 3302/5100 cut-off events. For 346098/346100 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28255 event pairs, 836 based on Foata normal form. 4/5102 useless extension candidates. Maximal degree in co-relation 40872. Up to 4913 conditions per place. [2024-06-03 20:08:14,322 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 262 selfloop transitions, 34 changer transitions 0/299 dead transitions. [2024-06-03 20:08:14,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 299 transitions, 4296 flow [2024-06-03 20:08:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:08:14,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-03 20:08:14,323 INFO L175 Difference]: Start difference. First operand has 231 places, 263 transitions, 3602 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:08:14,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 299 transitions, 4296 flow [2024-06-03 20:08:14,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 299 transitions, 4182 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:14,933 INFO L231 Difference]: Finished difference. Result has 233 places, 263 transitions, 3563 flow [2024-06-03 20:08:14,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3563, PETRI_PLACES=233, PETRI_TRANSITIONS=263} [2024-06-03 20:08:14,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-03 20:08:14,934 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 263 transitions, 3563 flow [2024-06-03 20:08:14,934 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) [2024-06-03 20:08:14,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:14,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:14,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:08:14,935 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:14,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash 565393600, now seen corresponding path program 9 times [2024-06-03 20:08:14,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:14,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255545166] [2024-06-03 20:08:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:14,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:15,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:15,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255545166] [2024-06-03 20:08:15,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255545166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:15,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:15,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:15,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875143675] [2024-06-03 20:08:15,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:15,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:15,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:16,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:16,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 263 transitions, 3563 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) [2024-06-03 20:08:16,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:16,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:16,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:17,157 INFO L124 PetriNetUnfolderBase]: 3307/5115 cut-off events. [2024-06-03 20:08:17,157 INFO L125 PetriNetUnfolderBase]: For 368877/368879 co-relation queries the response was YES. [2024-06-03 20:08:17,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40264 conditions, 5115 events. 3307/5115 cut-off events. For 368877/368879 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28404 event pairs, 833 based on Foata normal form. 32/5145 useless extension candidates. Maximal degree in co-relation 40149. Up to 4651 conditions per place. [2024-06-03 20:08:17,218 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 265 selfloop transitions, 47 changer transitions 0/315 dead transitions. [2024-06-03 20:08:17,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 315 transitions, 4418 flow [2024-06-03 20:08:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:08:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:08:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-03 20:08:17,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124168514412417 [2024-06-03 20:08:17,219 INFO L175 Difference]: Start difference. First operand has 233 places, 263 transitions, 3563 flow. Second operand 11 states and 186 transitions. [2024-06-03 20:08:17,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 315 transitions, 4418 flow [2024-06-03 20:08:17,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 315 transitions, 4338 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:08:17,998 INFO L231 Difference]: Finished difference. Result has 236 places, 265 transitions, 3656 flow [2024-06-03 20:08:17,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3483, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3656, PETRI_PLACES=236, PETRI_TRANSITIONS=265} [2024-06-03 20:08:17,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-03 20:08:17,999 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 265 transitions, 3656 flow [2024-06-03 20:08:17,999 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) [2024-06-03 20:08:17,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:17,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:08:17,999 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)] === [2024-06-03 20:08:17,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash -520278762, now seen corresponding path program 1 times [2024-06-03 20:08:17,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:17,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202132512] [2024-06-03 20:08:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202132512] [2024-06-03 20:08:18,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202132512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:18,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:18,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:08:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234868245] [2024-06-03 20:08:18,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:18,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:08:18,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:08:18,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:08:18,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:08:18,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 265 transitions, 3656 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) [2024-06-03 20:08:18,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:18,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:08:18,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:19,689 INFO L124 PetriNetUnfolderBase]: 3253/5058 cut-off events. [2024-06-03 20:08:19,689 INFO L125 PetriNetUnfolderBase]: For 352030/352030 co-relation queries the response was YES. [2024-06-03 20:08:19,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40454 conditions, 5058 events. 3253/5058 cut-off events. For 352030/352030 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28362 event pairs, 865 based on Foata normal form. 6/5031 useless extension candidates. Maximal degree in co-relation 40338. Up to 4844 conditions per place. [2024-06-03 20:08:19,735 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 234 selfloop transitions, 49 changer transitions 0/301 dead transitions. [2024-06-03 20:08:19,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 301 transitions, 4545 flow [2024-06-03 20:08:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:08:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:08:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:08:19,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 20:08:19,736 INFO L175 Difference]: Start difference. First operand has 236 places, 265 transitions, 3656 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:08:19,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 301 transitions, 4545 flow [2024-06-03 20:08:20,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 301 transitions, 4424 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-03 20:08:20,365 INFO L231 Difference]: Finished difference. Result has 234 places, 281 transitions, 3837 flow [2024-06-03 20:08:20,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3837, PETRI_PLACES=234, PETRI_TRANSITIONS=281} [2024-06-03 20:08:20,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 20:08:20,366 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 281 transitions, 3837 flow [2024-06-03 20:08:20,366 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) [2024-06-03 20:08:20,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:20,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:20,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:08:20,366 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)] === [2024-06-03 20:08:20,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 640699000, now seen corresponding path program 5 times [2024-06-03 20:08:20,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:20,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987559270] [2024-06-03 20:08:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:20,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:21,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:21,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987559270] [2024-06-03 20:08:21,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987559270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:21,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:21,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:21,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027522527] [2024-06-03 20:08:21,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:21,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:21,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:21,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:21,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:21,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 281 transitions, 3837 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) [2024-06-03 20:08:21,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:21,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:21,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:22,691 INFO L124 PetriNetUnfolderBase]: 3369/5205 cut-off events. [2024-06-03 20:08:22,692 INFO L125 PetriNetUnfolderBase]: For 345843/345845 co-relation queries the response was YES. [2024-06-03 20:08:22,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40914 conditions, 5205 events. 3369/5205 cut-off events. For 345843/345845 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28988 event pairs, 879 based on Foata normal form. 4/5207 useless extension candidates. Maximal degree in co-relation 40797. Up to 5007 conditions per place. [2024-06-03 20:08:22,748 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 280 selfloop transitions, 34 changer transitions 0/317 dead transitions. [2024-06-03 20:08:22,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 317 transitions, 4609 flow [2024-06-03 20:08:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:08:22,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-03 20:08:22,750 INFO L175 Difference]: Start difference. First operand has 234 places, 281 transitions, 3837 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:08:22,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 317 transitions, 4609 flow [2024-06-03 20:08:23,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 317 transitions, 4524 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 20:08:23,384 INFO L231 Difference]: Finished difference. Result has 239 places, 283 transitions, 3879 flow [2024-06-03 20:08:23,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3879, PETRI_PLACES=239, PETRI_TRANSITIONS=283} [2024-06-03 20:08:23,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-03 20:08:23,384 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 283 transitions, 3879 flow [2024-06-03 20:08:23,384 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) [2024-06-03 20:08:23,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:23,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:23,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:08:23,385 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)] === [2024-06-03 20:08:23,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2081927112, now seen corresponding path program 6 times [2024-06-03 20:08:23,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:23,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919312172] [2024-06-03 20:08:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:23,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:24,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:24,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919312172] [2024-06-03 20:08:24,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919312172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:24,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:24,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:24,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343578478] [2024-06-03 20:08:24,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:24,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:24,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:24,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:24,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:24,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 283 transitions, 3879 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) [2024-06-03 20:08:24,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:24,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:24,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:25,453 INFO L124 PetriNetUnfolderBase]: 3386/5232 cut-off events. [2024-06-03 20:08:25,453 INFO L125 PetriNetUnfolderBase]: For 359841/359843 co-relation queries the response was YES. [2024-06-03 20:08:25,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41488 conditions, 5232 events. 3386/5232 cut-off events. For 359841/359843 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29126 event pairs, 885 based on Foata normal form. 6/5236 useless extension candidates. Maximal degree in co-relation 41370. Up to 5127 conditions per place. [2024-06-03 20:08:25,510 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 292 selfloop transitions, 17 changer transitions 0/312 dead transitions. [2024-06-03 20:08:25,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 312 transitions, 4621 flow [2024-06-03 20:08:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:08:25,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:08:25,511 INFO L175 Difference]: Start difference. First operand has 239 places, 283 transitions, 3879 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:08:25,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 312 transitions, 4621 flow [2024-06-03 20:08:26,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 312 transitions, 4512 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:26,202 INFO L231 Difference]: Finished difference. Result has 241 places, 285 transitions, 3867 flow [2024-06-03 20:08:26,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3770, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3867, PETRI_PLACES=241, PETRI_TRANSITIONS=285} [2024-06-03 20:08:26,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-03 20:08:26,203 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 285 transitions, 3867 flow [2024-06-03 20:08:26,203 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) [2024-06-03 20:08:26,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:26,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:26,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:08:26,203 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)] === [2024-06-03 20:08:26,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:26,203 INFO L85 PathProgramCache]: Analyzing trace with hash -953745962, now seen corresponding path program 7 times [2024-06-03 20:08:26,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:26,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812815950] [2024-06-03 20:08:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:26,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:27,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:27,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812815950] [2024-06-03 20:08:27,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812815950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:27,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:27,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:27,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296400102] [2024-06-03 20:08:27,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:27,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:27,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:27,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:27,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:27,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:27,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 285 transitions, 3867 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) [2024-06-03 20:08:27,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:27,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:27,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:28,385 INFO L124 PetriNetUnfolderBase]: 3403/5259 cut-off events. [2024-06-03 20:08:28,385 INFO L125 PetriNetUnfolderBase]: For 373790/373792 co-relation queries the response was YES. [2024-06-03 20:08:28,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41842 conditions, 5259 events. 3403/5259 cut-off events. For 373790/373792 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29392 event pairs, 884 based on Foata normal form. 4/5261 useless extension candidates. Maximal degree in co-relation 41723. Up to 5061 conditions per place. [2024-06-03 20:08:28,444 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 283 selfloop transitions, 32 changer transitions 0/318 dead transitions. [2024-06-03 20:08:28,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 4641 flow [2024-06-03 20:08:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:08:28,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:08:28,445 INFO L175 Difference]: Start difference. First operand has 241 places, 285 transitions, 3867 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:08:28,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 4641 flow [2024-06-03 20:08:29,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 318 transitions, 4562 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:29,214 INFO L231 Difference]: Finished difference. Result has 243 places, 287 transitions, 3919 flow [2024-06-03 20:08:29,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3788, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3919, PETRI_PLACES=243, PETRI_TRANSITIONS=287} [2024-06-03 20:08:29,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-03 20:08:29,214 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 287 transitions, 3919 flow [2024-06-03 20:08:29,214 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) [2024-06-03 20:08:29,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:29,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:29,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:08:29,215 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)] === [2024-06-03 20:08:29,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1823372232, now seen corresponding path program 8 times [2024-06-03 20:08:29,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:29,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105627662] [2024-06-03 20:08:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:29,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:30,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105627662] [2024-06-03 20:08:30,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105627662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:30,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:30,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:30,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573382317] [2024-06-03 20:08:30,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:30,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:30,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:30,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:30,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 287 transitions, 3919 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) [2024-06-03 20:08:30,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:30,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:30,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:31,511 INFO L124 PetriNetUnfolderBase]: 3420/5286 cut-off events. [2024-06-03 20:08:31,511 INFO L125 PetriNetUnfolderBase]: For 388223/388225 co-relation queries the response was YES. [2024-06-03 20:08:31,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42391 conditions, 5286 events. 3420/5286 cut-off events. For 388223/388225 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29510 event pairs, 905 based on Foata normal form. 6/5290 useless extension candidates. Maximal degree in co-relation 42271. Up to 5163 conditions per place. [2024-06-03 20:08:31,576 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 288 selfloop transitions, 25 changer transitions 0/316 dead transitions. [2024-06-03 20:08:31,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 316 transitions, 4681 flow [2024-06-03 20:08:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:08:31,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:08:31,577 INFO L175 Difference]: Start difference. First operand has 243 places, 287 transitions, 3919 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:08:31,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 316 transitions, 4681 flow [2024-06-03 20:08:32,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 316 transitions, 4568 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:32,475 INFO L231 Difference]: Finished difference. Result has 245 places, 289 transitions, 3928 flow [2024-06-03 20:08:32,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3928, PETRI_PLACES=245, PETRI_TRANSITIONS=289} [2024-06-03 20:08:32,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-03 20:08:32,476 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 289 transitions, 3928 flow [2024-06-03 20:08:32,476 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) [2024-06-03 20:08:32,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:32,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:32,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:08:32,476 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)] === [2024-06-03 20:08:32,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:32,477 INFO L85 PathProgramCache]: Analyzing trace with hash -959463974, now seen corresponding path program 10 times [2024-06-03 20:08:32,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:32,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745972856] [2024-06-03 20:08:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:32,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:33,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:33,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745972856] [2024-06-03 20:08:33,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745972856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:33,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:33,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:33,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124012460] [2024-06-03 20:08:33,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:33,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:33,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:33,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:33,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:33,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 289 transitions, 3928 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) [2024-06-03 20:08:33,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:33,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:33,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:34,835 INFO L124 PetriNetUnfolderBase]: 3642/5656 cut-off events. [2024-06-03 20:08:34,835 INFO L125 PetriNetUnfolderBase]: For 464678/464680 co-relation queries the response was YES. [2024-06-03 20:08:34,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46377 conditions, 5656 events. 3642/5656 cut-off events. For 464678/464680 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 32251 event pairs, 824 based on Foata normal form. 16/5670 useless extension candidates. Maximal degree in co-relation 46256. Up to 4845 conditions per place. [2024-06-03 20:08:34,896 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 288 selfloop transitions, 55 changer transitions 0/346 dead transitions. [2024-06-03 20:08:34,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 346 transitions, 5184 flow [2024-06-03 20:08:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:08:34,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-03 20:08:34,897 INFO L175 Difference]: Start difference. First operand has 245 places, 289 transitions, 3928 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:08:34,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 346 transitions, 5184 flow [2024-06-03 20:08:35,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 346 transitions, 5024 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:35,744 INFO L231 Difference]: Finished difference. Result has 249 places, 294 transitions, 4084 flow [2024-06-03 20:08:35,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4084, PETRI_PLACES=249, PETRI_TRANSITIONS=294} [2024-06-03 20:08:35,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-03 20:08:35,744 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 294 transitions, 4084 flow [2024-06-03 20:08:35,744 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) [2024-06-03 20:08:35,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:35,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:35,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:08:35,745 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)] === [2024-06-03 20:08:35,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash -953738522, now seen corresponding path program 9 times [2024-06-03 20:08:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314445647] [2024-06-03 20:08:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:36,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:36,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314445647] [2024-06-03 20:08:36,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314445647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:36,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:36,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:36,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899817635] [2024-06-03 20:08:36,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:36,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:36,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:36,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:36,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:36,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 294 transitions, 4084 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) [2024-06-03 20:08:36,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:36,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:36,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:38,048 INFO L124 PetriNetUnfolderBase]: 3659/5683 cut-off events. [2024-06-03 20:08:38,048 INFO L125 PetriNetUnfolderBase]: For 464317/464319 co-relation queries the response was YES. [2024-06-03 20:08:38,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46956 conditions, 5683 events. 3659/5683 cut-off events. For 464317/464319 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32547 event pairs, 978 based on Foata normal form. 4/5685 useless extension candidates. Maximal degree in co-relation 46833. Up to 5426 conditions per place. [2024-06-03 20:08:38,118 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 287 selfloop transitions, 37 changer transitions 0/327 dead transitions. [2024-06-03 20:08:38,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 327 transitions, 4884 flow [2024-06-03 20:08:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:08:38,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:08:38,119 INFO L175 Difference]: Start difference. First operand has 249 places, 294 transitions, 4084 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:08:38,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 327 transitions, 4884 flow [2024-06-03 20:08:39,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 327 transitions, 4796 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:08:39,138 INFO L231 Difference]: Finished difference. Result has 252 places, 296 transitions, 4147 flow [2024-06-03 20:08:39,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4147, PETRI_PLACES=252, PETRI_TRANSITIONS=296} [2024-06-03 20:08:39,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-03 20:08:39,138 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 296 transitions, 4147 flow [2024-06-03 20:08:39,138 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) [2024-06-03 20:08:39,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:39,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:39,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:08:39,139 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)] === [2024-06-03 20:08:39,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash 646055428, now seen corresponding path program 11 times [2024-06-03 20:08:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805557463] [2024-06-03 20:08:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:40,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:40,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805557463] [2024-06-03 20:08:40,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805557463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:40,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:40,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:40,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385895537] [2024-06-03 20:08:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:40,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:40,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:40,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:40,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 296 transitions, 4147 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) [2024-06-03 20:08:40,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:40,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:40,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:41,466 INFO L124 PetriNetUnfolderBase]: 3775/5879 cut-off events. [2024-06-03 20:08:41,466 INFO L125 PetriNetUnfolderBase]: For 523437/523439 co-relation queries the response was YES. [2024-06-03 20:08:41,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48325 conditions, 5879 events. 3775/5879 cut-off events. For 523437/523439 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 34007 event pairs, 1008 based on Foata normal form. 32/5909 useless extension candidates. Maximal degree in co-relation 48200. Up to 5469 conditions per place. [2024-06-03 20:08:41,537 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 299 selfloop transitions, 36 changer transitions 0/338 dead transitions. [2024-06-03 20:08:41,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 338 transitions, 5024 flow [2024-06-03 20:08:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:08:41,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:08:41,538 INFO L175 Difference]: Start difference. First operand has 252 places, 296 transitions, 4147 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:08:41,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 338 transitions, 5024 flow [2024-06-03 20:08:42,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 338 transitions, 4893 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:08:42,480 INFO L231 Difference]: Finished difference. Result has 255 places, 298 transitions, 4169 flow [2024-06-03 20:08:42,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4169, PETRI_PLACES=255, PETRI_TRANSITIONS=298} [2024-06-03 20:08:42,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-03 20:08:42,480 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 298 transitions, 4169 flow [2024-06-03 20:08:42,480 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) [2024-06-03 20:08:42,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:42,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:42,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:08:42,481 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)] === [2024-06-03 20:08:42,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash -959316104, now seen corresponding path program 12 times [2024-06-03 20:08:42,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:42,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224078601] [2024-06-03 20:08:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:43,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:43,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224078601] [2024-06-03 20:08:43,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224078601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:43,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:43,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:43,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359956743] [2024-06-03 20:08:43,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:43,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:43,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 298 transitions, 4169 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) [2024-06-03 20:08:43,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:43,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:43,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:44,981 INFO L124 PetriNetUnfolderBase]: 3891/6075 cut-off events. [2024-06-03 20:08:44,981 INFO L125 PetriNetUnfolderBase]: For 544062/544064 co-relation queries the response was YES. [2024-06-03 20:08:45,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49689 conditions, 6075 events. 3891/6075 cut-off events. For 544062/544064 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35626 event pairs, 1038 based on Foata normal form. 32/6105 useless extension candidates. Maximal degree in co-relation 49564. Up to 5665 conditions per place. [2024-06-03 20:08:45,042 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 302 selfloop transitions, 38 changer transitions 0/343 dead transitions. [2024-06-03 20:08:45,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 343 transitions, 5068 flow [2024-06-03 20:08:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:08:45,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-03 20:08:45,043 INFO L175 Difference]: Start difference. First operand has 255 places, 298 transitions, 4169 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:08:45,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 343 transitions, 5068 flow [2024-06-03 20:08:45,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 343 transitions, 4972 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:45,951 INFO L231 Difference]: Finished difference. Result has 257 places, 300 transitions, 4234 flow [2024-06-03 20:08:45,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4073, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4234, PETRI_PLACES=257, PETRI_TRANSITIONS=300} [2024-06-03 20:08:45,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-03 20:08:45,952 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 300 transitions, 4234 flow [2024-06-03 20:08:45,952 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) [2024-06-03 20:08:45,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:45,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:45,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:08:45,953 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:45,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash -959460254, now seen corresponding path program 13 times [2024-06-03 20:08:45,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:45,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461997780] [2024-06-03 20:08:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:45,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:46,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461997780] [2024-06-03 20:08:46,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461997780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:46,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:46,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:46,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022576887] [2024-06-03 20:08:46,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:46,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:47,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:47,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 300 transitions, 4234 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) [2024-06-03 20:08:47,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:47,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:47,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:48,497 INFO L124 PetriNetUnfolderBase]: 3966/6200 cut-off events. [2024-06-03 20:08:48,497 INFO L125 PetriNetUnfolderBase]: For 542565/542567 co-relation queries the response was YES. [2024-06-03 20:08:48,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50622 conditions, 6200 events. 3966/6200 cut-off events. For 542565/542567 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36546 event pairs, 1038 based on Foata normal form. 20/6218 useless extension candidates. Maximal degree in co-relation 50496. Up to 5582 conditions per place. [2024-06-03 20:08:48,570 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 296 selfloop transitions, 53 changer transitions 0/352 dead transitions. [2024-06-03 20:08:48,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 352 transitions, 5136 flow [2024-06-03 20:08:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:08:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:08:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-03 20:08:48,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-03 20:08:48,571 INFO L175 Difference]: Start difference. First operand has 257 places, 300 transitions, 4234 flow. Second operand 10 states and 178 transitions. [2024-06-03 20:08:48,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 352 transitions, 5136 flow [2024-06-03 20:08:49,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 352 transitions, 5032 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:49,587 INFO L231 Difference]: Finished difference. Result has 260 places, 301 transitions, 4285 flow [2024-06-03 20:08:49,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4285, PETRI_PLACES=260, PETRI_TRANSITIONS=301} [2024-06-03 20:08:49,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-03 20:08:49,588 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 301 transitions, 4285 flow [2024-06-03 20:08:49,588 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) [2024-06-03 20:08:49,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:49,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:49,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:08:49,589 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:49,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash -992775562, now seen corresponding path program 10 times [2024-06-03 20:08:49,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:49,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127664646] [2024-06-03 20:08:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:49,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127664646] [2024-06-03 20:08:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127664646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:50,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:50,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845990959] [2024-06-03 20:08:50,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:50,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:50,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 301 transitions, 4285 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) [2024-06-03 20:08:50,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:50,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:50,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:52,123 INFO L124 PetriNetUnfolderBase]: 4000/6254 cut-off events. [2024-06-03 20:08:52,123 INFO L125 PetriNetUnfolderBase]: For 532384/532386 co-relation queries the response was YES. [2024-06-03 20:08:52,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51191 conditions, 6254 events. 4000/6254 cut-off events. For 532384/532386 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36979 event pairs, 1079 based on Foata normal form. 6/6258 useless extension candidates. Maximal degree in co-relation 51064. Up to 6122 conditions per place. [2024-06-03 20:08:52,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 20 changer transitions 0/333 dead transitions. [2024-06-03 20:08:52,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 333 transitions, 5101 flow [2024-06-03 20:08:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:08:52,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:08:52,220 INFO L175 Difference]: Start difference. First operand has 260 places, 301 transitions, 4285 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:08:52,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 333 transitions, 5101 flow [2024-06-03 20:08:53,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 333 transitions, 4990 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:08:53,076 INFO L231 Difference]: Finished difference. Result has 261 places, 306 transitions, 4319 flow [2024-06-03 20:08:53,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4319, PETRI_PLACES=261, PETRI_TRANSITIONS=306} [2024-06-03 20:08:53,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 20:08:53,076 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 306 transitions, 4319 flow [2024-06-03 20:08:53,077 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) [2024-06-03 20:08:53,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:53,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:53,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:08:53,077 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:53,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash -992990764, now seen corresponding path program 14 times [2024-06-03 20:08:53,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:53,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460468608] [2024-06-03 20:08:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:53,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:54,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460468608] [2024-06-03 20:08:54,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460468608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:54,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:54,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:54,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219000816] [2024-06-03 20:08:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:54,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:54,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:54,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 306 transitions, 4319 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) [2024-06-03 20:08:54,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:54,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:54,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:55,550 INFO L124 PetriNetUnfolderBase]: 3944/6166 cut-off events. [2024-06-03 20:08:55,550 INFO L125 PetriNetUnfolderBase]: For 540307/540309 co-relation queries the response was YES. [2024-06-03 20:08:55,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48838 conditions, 6166 events. 3944/6166 cut-off events. For 540307/540309 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36361 event pairs, 1038 based on Foata normal form. 34/6198 useless extension candidates. Maximal degree in co-relation 48709. Up to 5863 conditions per place. [2024-06-03 20:08:55,609 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 319 selfloop transitions, 21 changer transitions 0/343 dead transitions. [2024-06-03 20:08:55,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 343 transitions, 5163 flow [2024-06-03 20:08:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:08:55,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:08:55,610 INFO L175 Difference]: Start difference. First operand has 261 places, 306 transitions, 4319 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:08:55,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 343 transitions, 5163 flow [2024-06-03 20:08:56,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 343 transitions, 5028 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 20:08:56,675 INFO L231 Difference]: Finished difference. Result has 265 places, 307 transitions, 4274 flow [2024-06-03 20:08:56,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4196, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4274, PETRI_PLACES=265, PETRI_TRANSITIONS=307} [2024-06-03 20:08:56,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-03 20:08:56,676 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 307 transitions, 4274 flow [2024-06-03 20:08:56,676 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) [2024-06-03 20:08:56,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:56,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:56,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:08:56,676 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)] === [2024-06-03 20:08:56,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:56,676 INFO L85 PathProgramCache]: Analyzing trace with hash -985633379, now seen corresponding path program 1 times [2024-06-03 20:08:56,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:56,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398524863] [2024-06-03 20:08:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:56,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:57,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:57,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398524863] [2024-06-03 20:08:57,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398524863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:57,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:57,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:08:57,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091585552] [2024-06-03 20:08:57,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:57,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:08:57,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:08:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:08:57,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:08:57,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 307 transitions, 4274 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) [2024-06-03 20:08:57,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:57,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:08:57,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:59,424 INFO L124 PetriNetUnfolderBase]: 3939/6159 cut-off events. [2024-06-03 20:08:59,424 INFO L125 PetriNetUnfolderBase]: For 494575/494577 co-relation queries the response was YES. [2024-06-03 20:08:59,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48525 conditions, 6159 events. 3939/6159 cut-off events. For 494575/494577 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36306 event pairs, 1039 based on Foata normal form. 4/6161 useless extension candidates. Maximal degree in co-relation 48395. Up to 6027 conditions per place. [2024-06-03 20:08:59,495 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 302 selfloop transitions, 29 changer transitions 0/334 dead transitions. [2024-06-03 20:08:59,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 334 transitions, 5014 flow [2024-06-03 20:08:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 20:08:59,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-03 20:08:59,497 INFO L175 Difference]: Start difference. First operand has 265 places, 307 transitions, 4274 flow. Second operand 8 states and 129 transitions. [2024-06-03 20:08:59,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 334 transitions, 5014 flow [2024-06-03 20:09:00,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 334 transitions, 4946 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:00,851 INFO L231 Difference]: Finished difference. Result has 266 places, 307 transitions, 4276 flow [2024-06-03 20:09:00,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4276, PETRI_PLACES=266, PETRI_TRANSITIONS=307} [2024-06-03 20:09:00,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-03 20:09:00,851 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 307 transitions, 4276 flow [2024-06-03 20:09:00,851 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) [2024-06-03 20:09:00,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:00,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:00,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:09:00,852 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:00,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1823379672, now seen corresponding path program 11 times [2024-06-03 20:09:00,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:00,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158460569] [2024-06-03 20:09:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:00,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:01,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158460569] [2024-06-03 20:09:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158460569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:01,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:01,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:09:01,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327814019] [2024-06-03 20:09:01,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:01,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:09:01,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:09:01,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:09:01,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:01,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 307 transitions, 4276 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) [2024-06-03 20:09:01,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:01,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:01,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:03,357 INFO L124 PetriNetUnfolderBase]: 3931/6147 cut-off events. [2024-06-03 20:09:03,358 INFO L125 PetriNetUnfolderBase]: For 505123/505125 co-relation queries the response was YES. [2024-06-03 20:09:03,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48317 conditions, 6147 events. 3931/6147 cut-off events. For 505123/505125 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36219 event pairs, 1032 based on Foata normal form. 6/6151 useless extension candidates. Maximal degree in co-relation 48186. Up to 5929 conditions per place. [2024-06-03 20:09:03,436 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 300 selfloop transitions, 33 changer transitions 0/336 dead transitions. [2024-06-03 20:09:03,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 336 transitions, 5090 flow [2024-06-03 20:09:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 20:09:03,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-03 20:09:03,437 INFO L175 Difference]: Start difference. First operand has 266 places, 307 transitions, 4276 flow. Second operand 8 states and 129 transitions. [2024-06-03 20:09:03,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 336 transitions, 5090 flow [2024-06-03 20:09:04,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 336 transitions, 4975 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:04,751 INFO L231 Difference]: Finished difference. Result has 267 places, 309 transitions, 4315 flow [2024-06-03 20:09:04,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4315, PETRI_PLACES=267, PETRI_TRANSITIONS=309} [2024-06-03 20:09:04,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-03 20:09:04,751 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 309 transitions, 4315 flow [2024-06-03 20:09:04,751 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) [2024-06-03 20:09:04,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:04,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:09:04,752 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)] === [2024-06-03 20:09:04,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2085655218, now seen corresponding path program 2 times [2024-06-03 20:09:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:04,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260262502] [2024-06-03 20:09:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:05,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:05,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260262502] [2024-06-03 20:09:05,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260262502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:05,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:05,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:09:05,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222975246] [2024-06-03 20:09:05,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:05,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:09:05,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:09:05,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:09:05,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:09:05,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 309 transitions, 4315 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) [2024-06-03 20:09:05,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:05,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:09:05,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:06,596 INFO L124 PetriNetUnfolderBase]: 3863/6068 cut-off events. [2024-06-03 20:09:06,596 INFO L125 PetriNetUnfolderBase]: For 510670/510672 co-relation queries the response was YES. [2024-06-03 20:09:06,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48028 conditions, 6068 events. 3863/6068 cut-off events. For 510670/510672 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36039 event pairs, 1009 based on Foata normal form. 5/6036 useless extension candidates. Maximal degree in co-relation 47896. Up to 5926 conditions per place. [2024-06-03 20:09:06,668 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 286 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-03 20:09:06,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 331 transitions, 5083 flow [2024-06-03 20:09:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:09:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:09:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-03 20:09:06,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-03 20:09:06,669 INFO L175 Difference]: Start difference. First operand has 267 places, 309 transitions, 4315 flow. Second operand 6 states and 97 transitions. [2024-06-03 20:09:06,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 331 transitions, 5083 flow [2024-06-03 20:09:07,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 331 transitions, 4949 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:07,636 INFO L231 Difference]: Finished difference. Result has 268 places, 321 transitions, 4389 flow [2024-06-03 20:09:07,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4389, PETRI_PLACES=268, PETRI_TRANSITIONS=321} [2024-06-03 20:09:07,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-03 20:09:07,637 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 321 transitions, 4389 flow [2024-06-03 20:09:07,637 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) [2024-06-03 20:09:07,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:07,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:07,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:09:07,637 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)] === [2024-06-03 20:09:07,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1282607658, now seen corresponding path program 3 times [2024-06-03 20:09:07,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:07,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837403028] [2024-06-03 20:09:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:07,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:08,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:08,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837403028] [2024-06-03 20:09:08,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837403028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:08,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:08,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:09:08,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720230864] [2024-06-03 20:09:08,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:08,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:09:08,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:08,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:09:08,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:09:08,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:09:08,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 321 transitions, 4389 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) [2024-06-03 20:09:08,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:08,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:09:08,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:09,571 INFO L124 PetriNetUnfolderBase]: 3865/6073 cut-off events. [2024-06-03 20:09:09,571 INFO L125 PetriNetUnfolderBase]: For 500643/500645 co-relation queries the response was YES. [2024-06-03 20:09:09,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47713 conditions, 6073 events. 3865/6073 cut-off events. For 500643/500645 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36071 event pairs, 1011 based on Foata normal form. 6/6042 useless extension candidates. Maximal degree in co-relation 47579. Up to 5850 conditions per place. [2024-06-03 20:09:09,641 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 260 selfloop transitions, 69 changer transitions 0/347 dead transitions. [2024-06-03 20:09:09,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 347 transitions, 5326 flow [2024-06-03 20:09:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:09:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:09:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:09:09,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:09:09,642 INFO L175 Difference]: Start difference. First operand has 268 places, 321 transitions, 4389 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:09:09,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 347 transitions, 5326 flow [2024-06-03 20:09:10,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 347 transitions, 5277 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-03 20:09:10,881 INFO L231 Difference]: Finished difference. Result has 272 places, 329 transitions, 4607 flow [2024-06-03 20:09:10,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4607, PETRI_PLACES=272, PETRI_TRANSITIONS=329} [2024-06-03 20:09:10,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-03 20:09:10,882 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 329 transitions, 4607 flow [2024-06-03 20:09:10,882 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) [2024-06-03 20:09:10,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:10,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:10,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:09:10,882 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:10,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1143815900, now seen corresponding path program 1 times [2024-06-03 20:09:10,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:10,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254610663] [2024-06-03 20:09:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:10,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:11,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:11,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254610663] [2024-06-03 20:09:11,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254610663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:11,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:11,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35336937] [2024-06-03 20:09:11,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:11,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:11,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:11,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:11,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 329 transitions, 4607 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) [2024-06-03 20:09:11,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:11,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:11,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:13,050 INFO L124 PetriNetUnfolderBase]: 3977/6212 cut-off events. [2024-06-03 20:09:13,051 INFO L125 PetriNetUnfolderBase]: For 507142/507144 co-relation queries the response was YES. [2024-06-03 20:09:13,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48747 conditions, 6212 events. 3977/6212 cut-off events. For 507142/507144 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36656 event pairs, 1047 based on Foata normal form. 4/6214 useless extension candidates. Maximal degree in co-relation 48611. Up to 6146 conditions per place. [2024-06-03 20:09:13,116 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 326 selfloop transitions, 21 changer transitions 0/350 dead transitions. [2024-06-03 20:09:13,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 350 transitions, 5561 flow [2024-06-03 20:09:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:09:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:09:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-03 20:09:13,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:09:13,117 INFO L175 Difference]: Start difference. First operand has 272 places, 329 transitions, 4607 flow. Second operand 6 states and 98 transitions. [2024-06-03 20:09:13,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 350 transitions, 5561 flow [2024-06-03 20:09:14,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 350 transitions, 5433 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:14,400 INFO L231 Difference]: Finished difference. Result has 274 places, 335 transitions, 4628 flow [2024-06-03 20:09:14,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4628, PETRI_PLACES=274, PETRI_TRANSITIONS=335} [2024-06-03 20:09:14,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-03 20:09:14,400 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 335 transitions, 4628 flow [2024-06-03 20:09:14,400 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) [2024-06-03 20:09:14,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:14,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:14,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:09:14,401 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:14,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1169796380, now seen corresponding path program 2 times [2024-06-03 20:09:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:14,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294454972] [2024-06-03 20:09:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:15,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294454972] [2024-06-03 20:09:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294454972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:15,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:15,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:15,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485439513] [2024-06-03 20:09:15,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:15,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:15,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:15,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:15,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 335 transitions, 4628 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) [2024-06-03 20:09:15,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:15,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:15,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:16,580 INFO L124 PetriNetUnfolderBase]: 3971/6204 cut-off events. [2024-06-03 20:09:16,580 INFO L125 PetriNetUnfolderBase]: For 505105/505107 co-relation queries the response was YES. [2024-06-03 20:09:16,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48750 conditions, 6204 events. 3971/6204 cut-off events. For 505105/505107 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 36629 event pairs, 1046 based on Foata normal form. 4/6206 useless extension candidates. Maximal degree in co-relation 48614. Up to 6149 conditions per place. [2024-06-03 20:09:16,653 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 326 selfloop transitions, 18 changer transitions 0/347 dead transitions. [2024-06-03 20:09:16,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 347 transitions, 5348 flow [2024-06-03 20:09:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:09:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:09:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-03 20:09:16,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:09:16,654 INFO L175 Difference]: Start difference. First operand has 274 places, 335 transitions, 4628 flow. Second operand 5 states and 85 transitions. [2024-06-03 20:09:16,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 347 transitions, 5348 flow [2024-06-03 20:09:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 347 transitions, 5267 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-03 20:09:17,652 INFO L231 Difference]: Finished difference. Result has 277 places, 335 transitions, 4595 flow [2024-06-03 20:09:17,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4595, PETRI_PLACES=277, PETRI_TRANSITIONS=335} [2024-06-03 20:09:17,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-03 20:09:17,653 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 335 transitions, 4595 flow [2024-06-03 20:09:17,653 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) [2024-06-03 20:09:17,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:17,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:17,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:09:17,653 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:17,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1282177068, now seen corresponding path program 1 times [2024-06-03 20:09:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:17,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831708846] [2024-06-03 20:09:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:18,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:18,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831708846] [2024-06-03 20:09:18,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831708846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:18,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:18,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:18,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198279933] [2024-06-03 20:09:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:18,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:18,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:18,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:18,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:18,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:09:18,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 335 transitions, 4595 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:18,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:18,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:09:18,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:20,037 INFO L124 PetriNetUnfolderBase]: 3864/6070 cut-off events. [2024-06-03 20:09:20,037 INFO L125 PetriNetUnfolderBase]: For 514705/514714 co-relation queries the response was YES. [2024-06-03 20:09:20,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48016 conditions, 6070 events. 3864/6070 cut-off events. For 514705/514714 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35973 event pairs, 1000 based on Foata normal form. 8/6041 useless extension candidates. Maximal degree in co-relation 47878. Up to 5935 conditions per place. [2024-06-03 20:09:20,110 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 309 selfloop transitions, 20 changer transitions 0/347 dead transitions. [2024-06-03 20:09:20,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 347 transitions, 5305 flow [2024-06-03 20:09:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:09:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:09:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-03 20:09:20,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:09:20,111 INFO L175 Difference]: Start difference. First operand has 277 places, 335 transitions, 4595 flow. Second operand 6 states and 96 transitions. [2024-06-03 20:09:20,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 347 transitions, 5305 flow [2024-06-03 20:09:21,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 347 transitions, 5269 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:21,462 INFO L231 Difference]: Finished difference. Result has 279 places, 337 transitions, 4637 flow [2024-06-03 20:09:21,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4637, PETRI_PLACES=279, PETRI_TRANSITIONS=337} [2024-06-03 20:09:21,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 20:09:21,463 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 337 transitions, 4637 flow [2024-06-03 20:09:21,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:21,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:21,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:21,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:09:21,464 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:21,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1226321629, now seen corresponding path program 1 times [2024-06-03 20:09:21,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:21,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012258539] [2024-06-03 20:09:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:21,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:22,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012258539] [2024-06-03 20:09:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012258539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:22,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:22,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:09:22,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407990087] [2024-06-03 20:09:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:09:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:09:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:09:23,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:23,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 337 transitions, 4637 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) [2024-06-03 20:09:23,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:23,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:23,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:24,391 INFO L124 PetriNetUnfolderBase]: 3941/6158 cut-off events. [2024-06-03 20:09:24,392 INFO L125 PetriNetUnfolderBase]: For 519033/519035 co-relation queries the response was YES. [2024-06-03 20:09:24,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47982 conditions, 6158 events. 3941/6158 cut-off events. For 519033/519035 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36289 event pairs, 882 based on Foata normal form. 12/6168 useless extension candidates. Maximal degree in co-relation 47843. Up to 5760 conditions per place. [2024-06-03 20:09:24,468 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 60 changer transitions 0/382 dead transitions. [2024-06-03 20:09:24,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 382 transitions, 5531 flow [2024-06-03 20:09:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:09:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:09:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-03 20:09:24,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-03 20:09:24,470 INFO L175 Difference]: Start difference. First operand has 279 places, 337 transitions, 4637 flow. Second operand 10 states and 169 transitions. [2024-06-03 20:09:24,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 382 transitions, 5531 flow [2024-06-03 20:09:25,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 382 transitions, 5455 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:25,423 INFO L231 Difference]: Finished difference. Result has 285 places, 337 transitions, 4687 flow [2024-06-03 20:09:25,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4561, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4687, PETRI_PLACES=285, PETRI_TRANSITIONS=337} [2024-06-03 20:09:25,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-03 20:09:25,425 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 337 transitions, 4687 flow [2024-06-03 20:09:25,425 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) [2024-06-03 20:09:25,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:25,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:25,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:09:25,425 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)] === [2024-06-03 20:09:25,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1041963026, now seen corresponding path program 1 times [2024-06-03 20:09:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:25,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150613065] [2024-06-03 20:09:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:26,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:26,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150613065] [2024-06-03 20:09:26,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150613065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:26,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:26,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370655995] [2024-06-03 20:09:26,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:26,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:26,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 337 transitions, 4687 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:09:26,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:26,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:26,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:27,475 INFO L124 PetriNetUnfolderBase]: 3981/6213 cut-off events. [2024-06-03 20:09:27,475 INFO L125 PetriNetUnfolderBase]: For 517167/517167 co-relation queries the response was YES. [2024-06-03 20:09:27,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48677 conditions, 6213 events. 3981/6213 cut-off events. For 517167/517167 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36511 event pairs, 1008 based on Foata normal form. 4/6215 useless extension candidates. Maximal degree in co-relation 48537. Up to 6038 conditions per place. [2024-06-03 20:09:27,550 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 53 changer transitions 0/389 dead transitions. [2024-06-03 20:09:27,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 389 transitions, 6093 flow [2024-06-03 20:09:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:09:27,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:09:27,551 INFO L175 Difference]: Start difference. First operand has 285 places, 337 transitions, 4687 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:09:27,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 389 transitions, 6093 flow [2024-06-03 20:09:28,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 389 transitions, 5957 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:09:28,728 INFO L231 Difference]: Finished difference. Result has 287 places, 356 transitions, 4941 flow [2024-06-03 20:09:28,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4557, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4941, PETRI_PLACES=287, PETRI_TRANSITIONS=356} [2024-06-03 20:09:28,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-03 20:09:28,728 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 356 transitions, 4941 flow [2024-06-03 20:09:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:09:28,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:28,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:28,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:09:28,729 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)] === [2024-06-03 20:09:28,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:28,729 INFO L85 PathProgramCache]: Analyzing trace with hash 518220083, now seen corresponding path program 2 times [2024-06-03 20:09:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:28,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704509273] [2024-06-03 20:09:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:28,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:30,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:30,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704509273] [2024-06-03 20:09:30,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704509273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:30,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:30,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:09:30,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116613220] [2024-06-03 20:09:30,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:30,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:09:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:09:30,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:09:30,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:30,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 356 transitions, 4941 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) [2024-06-03 20:09:30,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:30,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:30,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:31,669 INFO L124 PetriNetUnfolderBase]: 3961/6182 cut-off events. [2024-06-03 20:09:31,669 INFO L125 PetriNetUnfolderBase]: For 522888/522890 co-relation queries the response was YES. [2024-06-03 20:09:31,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48278 conditions, 6182 events. 3961/6182 cut-off events. For 522888/522890 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36318 event pairs, 925 based on Foata normal form. 12/6192 useless extension candidates. Maximal degree in co-relation 48135. Up to 5908 conditions per place. [2024-06-03 20:09:31,748 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 41 changer transitions 0/407 dead transitions. [2024-06-03 20:09:31,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 407 transitions, 5905 flow [2024-06-03 20:09:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:09:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:09:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-03 20:09:31,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39227642276422764 [2024-06-03 20:09:31,750 INFO L175 Difference]: Start difference. First operand has 287 places, 356 transitions, 4941 flow. Second operand 12 states and 193 transitions. [2024-06-03 20:09:31,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 407 transitions, 5905 flow [2024-06-03 20:09:32,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 407 transitions, 5822 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 20:09:32,978 INFO L231 Difference]: Finished difference. Result has 296 places, 356 transitions, 4947 flow [2024-06-03 20:09:32,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4947, PETRI_PLACES=296, PETRI_TRANSITIONS=356} [2024-06-03 20:09:32,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-03 20:09:32,979 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 356 transitions, 4947 flow [2024-06-03 20:09:32,979 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) [2024-06-03 20:09:32,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:32,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:32,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:09:32,979 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:32,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash 524706833, now seen corresponding path program 3 times [2024-06-03 20:09:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499629530] [2024-06-03 20:09:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:34,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499629530] [2024-06-03 20:09:34,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499629530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:34,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:34,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:09:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107356052] [2024-06-03 20:09:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:09:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:09:34,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:09:34,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:34,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 356 transitions, 4947 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) [2024-06-03 20:09:34,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:34,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:34,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:35,964 INFO L124 PetriNetUnfolderBase]: 4002/6253 cut-off events. [2024-06-03 20:09:35,964 INFO L125 PetriNetUnfolderBase]: For 539382/539384 co-relation queries the response was YES. [2024-06-03 20:09:36,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49039 conditions, 6253 events. 4002/6253 cut-off events. For 539382/539384 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36947 event pairs, 919 based on Foata normal form. 12/6263 useless extension candidates. Maximal degree in co-relation 48894. Up to 5938 conditions per place. [2024-06-03 20:09:36,044 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 363 selfloop transitions, 42 changer transitions 0/408 dead transitions. [2024-06-03 20:09:36,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 408 transitions, 5954 flow [2024-06-03 20:09:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:09:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:09:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-03 20:09:36,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:09:36,045 INFO L175 Difference]: Start difference. First operand has 296 places, 356 transitions, 4947 flow. Second operand 12 states and 192 transitions. [2024-06-03 20:09:36,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 408 transitions, 5954 flow [2024-06-03 20:09:37,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 408 transitions, 5858 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 20:09:37,280 INFO L231 Difference]: Finished difference. Result has 298 places, 357 transitions, 4987 flow [2024-06-03 20:09:37,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4987, PETRI_PLACES=298, PETRI_TRANSITIONS=357} [2024-06-03 20:09:37,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-03 20:09:37,281 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 357 transitions, 4987 flow [2024-06-03 20:09:37,281 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) [2024-06-03 20:09:37,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:37,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:37,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:09:37,281 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)] === [2024-06-03 20:09:37,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1051217456, now seen corresponding path program 2 times [2024-06-03 20:09:37,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:37,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865474796] [2024-06-03 20:09:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:37,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:38,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:38,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865474796] [2024-06-03 20:09:38,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865474796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:38,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:38,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:38,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50235411] [2024-06-03 20:09:38,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:38,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:38,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:38,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:38,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 357 transitions, 4987 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:09:38,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:38,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:38,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:39,307 INFO L124 PetriNetUnfolderBase]: 4062/6336 cut-off events. [2024-06-03 20:09:39,307 INFO L125 PetriNetUnfolderBase]: For 542363/542363 co-relation queries the response was YES. [2024-06-03 20:09:39,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49933 conditions, 6336 events. 4062/6336 cut-off events. For 542363/542363 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 37402 event pairs, 1011 based on Foata normal form. 4/6338 useless extension candidates. Maximal degree in co-relation 49787. Up to 6123 conditions per place. [2024-06-03 20:09:39,402 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 64 changer transitions 0/404 dead transitions. [2024-06-03 20:09:39,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 404 transitions, 6481 flow [2024-06-03 20:09:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:09:39,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:09:39,403 INFO L175 Difference]: Start difference. First operand has 298 places, 357 transitions, 4987 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:09:39,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 404 transitions, 6481 flow [2024-06-03 20:09:40,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 404 transitions, 6355 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-03 20:09:40,789 INFO L231 Difference]: Finished difference. Result has 298 places, 376 transitions, 5318 flow [2024-06-03 20:09:40,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5318, PETRI_PLACES=298, PETRI_TRANSITIONS=376} [2024-06-03 20:09:40,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-03 20:09:40,789 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 376 transitions, 5318 flow [2024-06-03 20:09:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:09:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:40,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:40,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:09:40,790 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)] === [2024-06-03 20:09:40,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash -814690458, now seen corresponding path program 3 times [2024-06-03 20:09:40,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:40,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545599883] [2024-06-03 20:09:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:40,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:41,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:41,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545599883] [2024-06-03 20:09:41,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545599883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:41,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:41,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:09:41,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668689442] [2024-06-03 20:09:41,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:41,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:09:41,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:09:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:09:41,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:41,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 376 transitions, 5318 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:09:41,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:41,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:41,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:42,959 INFO L124 PetriNetUnfolderBase]: 4203/6543 cut-off events. [2024-06-03 20:09:42,959 INFO L125 PetriNetUnfolderBase]: For 552618/552618 co-relation queries the response was YES. [2024-06-03 20:09:43,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51914 conditions, 6543 events. 4203/6543 cut-off events. For 552618/552618 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 38478 event pairs, 1050 based on Foata normal form. 2/6543 useless extension candidates. Maximal degree in co-relation 51765. Up to 6342 conditions per place. [2024-06-03 20:09:43,056 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 375 selfloop transitions, 70 changer transitions 0/448 dead transitions. [2024-06-03 20:09:43,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 448 transitions, 7342 flow [2024-06-03 20:09:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-03 20:09:43,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-03 20:09:43,057 INFO L175 Difference]: Start difference. First operand has 298 places, 376 transitions, 5318 flow. Second operand 9 states and 140 transitions. [2024-06-03 20:09:43,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 448 transitions, 7342 flow [2024-06-03 20:09:44,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 448 transitions, 7173 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-03 20:09:44,411 INFO L231 Difference]: Finished difference. Result has 308 places, 421 transitions, 6224 flow [2024-06-03 20:09:44,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5219, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6224, PETRI_PLACES=308, PETRI_TRANSITIONS=421} [2024-06-03 20:09:44,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-03 20:09:44,412 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 421 transitions, 6224 flow [2024-06-03 20:09:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:09:44,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:44,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:44,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:09:44,412 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:44,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1894827153, now seen corresponding path program 4 times [2024-06-03 20:09:44,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:44,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627019386] [2024-06-03 20:09:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:44,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627019386] [2024-06-03 20:09:45,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627019386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:45,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:45,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:09:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741708675] [2024-06-03 20:09:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:09:45,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:09:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:09:45,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:45,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 421 transitions, 6224 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) [2024-06-03 20:09:45,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:45,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:45,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:47,114 INFO L124 PetriNetUnfolderBase]: 4244/6615 cut-off events. [2024-06-03 20:09:47,114 INFO L125 PetriNetUnfolderBase]: For 591716/591718 co-relation queries the response was YES. [2024-06-03 20:09:47,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52772 conditions, 6615 events. 4244/6615 cut-off events. For 591716/591718 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 39132 event pairs, 1049 based on Foata normal form. 14/6627 useless extension candidates. Maximal degree in co-relation 52618. Up to 6435 conditions per place. [2024-06-03 20:09:47,205 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 19 changer transitions 0/455 dead transitions. [2024-06-03 20:09:47,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 455 transitions, 7279 flow [2024-06-03 20:09:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 20:09:47,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 20:09:47,208 INFO L175 Difference]: Start difference. First operand has 308 places, 421 transitions, 6224 flow. Second operand 9 states and 141 transitions. [2024-06-03 20:09:47,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 455 transitions, 7279 flow [2024-06-03 20:09:48,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 455 transitions, 7200 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 20:09:48,723 INFO L231 Difference]: Finished difference. Result has 314 places, 422 transitions, 6239 flow [2024-06-03 20:09:48,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6239, PETRI_PLACES=314, PETRI_TRANSITIONS=422} [2024-06-03 20:09:48,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-03 20:09:48,723 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 422 transitions, 6239 flow [2024-06-03 20:09:48,723 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) [2024-06-03 20:09:48,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:48,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:48,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:09:48,723 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:48,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash -170105263, now seen corresponding path program 5 times [2024-06-03 20:09:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:48,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776807796] [2024-06-03 20:09:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:50,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:50,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776807796] [2024-06-03 20:09:50,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776807796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:50,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:50,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:09:50,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466227801] [2024-06-03 20:09:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:50,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:09:50,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:50,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:09:50,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:09:50,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:50,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 422 transitions, 6239 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) [2024-06-03 20:09:50,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:50,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:50,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:51,626 INFO L124 PetriNetUnfolderBase]: 4257/6642 cut-off events. [2024-06-03 20:09:51,626 INFO L125 PetriNetUnfolderBase]: For 610198/610200 co-relation queries the response was YES. [2024-06-03 20:09:51,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52026 conditions, 6642 events. 4257/6642 cut-off events. For 610198/610200 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 39395 event pairs, 1068 based on Foata normal form. 30/6670 useless extension candidates. Maximal degree in co-relation 51871. Up to 6118 conditions per place. [2024-06-03 20:09:51,725 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 419 selfloop transitions, 36 changer transitions 0/458 dead transitions. [2024-06-03 20:09:51,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 458 transitions, 7328 flow [2024-06-03 20:09:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:09:51,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:09:51,726 INFO L175 Difference]: Start difference. First operand has 314 places, 422 transitions, 6239 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:09:51,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 458 transitions, 7328 flow [2024-06-03 20:09:53,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 458 transitions, 7248 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:53,787 INFO L231 Difference]: Finished difference. Result has 317 places, 423 transitions, 6297 flow [2024-06-03 20:09:53,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6297, PETRI_PLACES=317, PETRI_TRANSITIONS=423} [2024-06-03 20:09:53,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-03 20:09:53,788 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 423 transitions, 6297 flow [2024-06-03 20:09:53,788 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) [2024-06-03 20:09:53,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:53,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:53,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:09:53,788 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:53,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash 498877615, now seen corresponding path program 6 times [2024-06-03 20:09:53,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:53,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556623430] [2024-06-03 20:09:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:53,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:54,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556623430] [2024-06-03 20:09:54,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556623430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:54,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:09:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630442900] [2024-06-03 20:09:54,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:54,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:09:54,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:54,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:09:54,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:09:55,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:09:55,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 423 transitions, 6297 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) [2024-06-03 20:09:55,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:55,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:09:55,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:56,844 INFO L124 PetriNetUnfolderBase]: 4298/6711 cut-off events. [2024-06-03 20:09:56,844 INFO L125 PetriNetUnfolderBase]: For 588919/588923 co-relation queries the response was YES. [2024-06-03 20:09:56,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52620 conditions, 6711 events. 4298/6711 cut-off events. For 588919/588923 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 40064 event pairs, 1039 based on Foata normal form. 14/6723 useless extension candidates. Maximal degree in co-relation 52463. Up to 6338 conditions per place. [2024-06-03 20:09:56,923 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 406 selfloop transitions, 52 changer transitions 0/461 dead transitions. [2024-06-03 20:09:56,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 461 transitions, 7382 flow [2024-06-03 20:09:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:09:56,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-03 20:09:56,924 INFO L175 Difference]: Start difference. First operand has 317 places, 423 transitions, 6297 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:09:56,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 461 transitions, 7382 flow [2024-06-03 20:09:58,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 461 transitions, 7121 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-03 20:09:58,515 INFO L231 Difference]: Finished difference. Result has 316 places, 424 transitions, 6198 flow [2024-06-03 20:09:58,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6036, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6198, PETRI_PLACES=316, PETRI_TRANSITIONS=424} [2024-06-03 20:09:58,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-03 20:09:58,515 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 424 transitions, 6198 flow [2024-06-03 20:09:58,515 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) [2024-06-03 20:09:58,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:58,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:09:58,516 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)] === [2024-06-03 20:09:58,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash -169868113, now seen corresponding path program 7 times [2024-06-03 20:09:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:58,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54539809] [2024-06-03 20:09:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:00,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:00,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54539809] [2024-06-03 20:10:00,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54539809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:00,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:00,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:10:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683818140] [2024-06-03 20:10:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:00,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:10:00,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:10:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:10:00,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:00,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 424 transitions, 6198 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) [2024-06-03 20:10:00,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:00,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:00,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:01,788 INFO L124 PetriNetUnfolderBase]: 4278/6681 cut-off events. [2024-06-03 20:10:01,788 INFO L125 PetriNetUnfolderBase]: For 572033/572035 co-relation queries the response was YES. [2024-06-03 20:10:01,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50721 conditions, 6681 events. 4278/6681 cut-off events. For 572033/572035 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 39851 event pairs, 1049 based on Foata normal form. 14/6693 useless extension candidates. Maximal degree in co-relation 50566. Up to 6378 conditions per place. [2024-06-03 20:10:01,879 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 418 selfloop transitions, 35 changer transitions 0/456 dead transitions. [2024-06-03 20:10:01,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 456 transitions, 7077 flow [2024-06-03 20:10:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 20:10:01,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 20:10:01,881 INFO L175 Difference]: Start difference. First operand has 316 places, 424 transitions, 6198 flow. Second operand 9 states and 143 transitions. [2024-06-03 20:10:01,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 456 transitions, 7077 flow [2024-06-03 20:10:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 456 transitions, 6929 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:03,278 INFO L231 Difference]: Finished difference. Result has 317 places, 423 transitions, 5993 flow [2024-06-03 20:10:03,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5918, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5993, PETRI_PLACES=317, PETRI_TRANSITIONS=423} [2024-06-03 20:10:03,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-03 20:10:03,278 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 423 transitions, 5993 flow [2024-06-03 20:10:03,278 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) [2024-06-03 20:10:03,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:03,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:03,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:10:03,279 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:03,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash -243699434, now seen corresponding path program 4 times [2024-06-03 20:10:03,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:03,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178870540] [2024-06-03 20:10:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:03,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:03,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:03,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178870540] [2024-06-03 20:10:03,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178870540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:03,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:03,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:03,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276850645] [2024-06-03 20:10:03,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:03,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:03,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:04,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:04,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 423 transitions, 5993 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:04,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:04,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:04,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:05,369 INFO L124 PetriNetUnfolderBase]: 4282/6682 cut-off events. [2024-06-03 20:10:05,369 INFO L125 PetriNetUnfolderBase]: For 555908/555914 co-relation queries the response was YES. [2024-06-03 20:10:05,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50461 conditions, 6682 events. 4282/6682 cut-off events. For 555908/555914 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39770 event pairs, 1022 based on Foata normal form. 10/6690 useless extension candidates. Maximal degree in co-relation 50305. Up to 6360 conditions per place. [2024-06-03 20:10:05,458 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 338 selfloop transitions, 113 changer transitions 0/454 dead transitions. [2024-06-03 20:10:05,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 454 transitions, 7341 flow [2024-06-03 20:10:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 20:10:05,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-03 20:10:05,459 INFO L175 Difference]: Start difference. First operand has 317 places, 423 transitions, 5993 flow. Second operand 7 states and 125 transitions. [2024-06-03 20:10:05,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 454 transitions, 7341 flow [2024-06-03 20:10:07,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 454 transitions, 7224 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:07,412 INFO L231 Difference]: Finished difference. Result has 317 places, 426 transitions, 6197 flow [2024-06-03 20:10:07,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6197, PETRI_PLACES=317, PETRI_TRANSITIONS=426} [2024-06-03 20:10:07,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-03 20:10:07,412 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 426 transitions, 6197 flow [2024-06-03 20:10:07,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:07,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:07,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:07,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:10:07,413 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:07,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1106130680, now seen corresponding path program 5 times [2024-06-03 20:10:07,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:07,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274584657] [2024-06-03 20:10:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:07,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:08,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:08,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274584657] [2024-06-03 20:10:08,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274584657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:08,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:08,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:08,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380572955] [2024-06-03 20:10:08,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:08,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:08,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:08,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:08,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 426 transitions, 6197 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:08,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:08,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:08,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:09,501 INFO L124 PetriNetUnfolderBase]: 4282/6686 cut-off events. [2024-06-03 20:10:09,501 INFO L125 PetriNetUnfolderBase]: For 561777/561777 co-relation queries the response was YES. [2024-06-03 20:10:09,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50523 conditions, 6686 events. 4282/6686 cut-off events. For 561777/561777 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39812 event pairs, 1041 based on Foata normal form. 4/6688 useless extension candidates. Maximal degree in co-relation 50366. Up to 6358 conditions per place. [2024-06-03 20:10:09,590 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 332 selfloop transitions, 116 changer transitions 0/451 dead transitions. [2024-06-03 20:10:09,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 451 transitions, 7391 flow [2024-06-03 20:10:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 20:10:09,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 20:10:09,591 INFO L175 Difference]: Start difference. First operand has 317 places, 426 transitions, 6197 flow. Second operand 7 states and 118 transitions. [2024-06-03 20:10:09,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 451 transitions, 7391 flow [2024-06-03 20:10:11,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 451 transitions, 7251 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 20:10:11,095 INFO L231 Difference]: Finished difference. Result has 321 places, 430 transitions, 6381 flow [2024-06-03 20:10:11,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6381, PETRI_PLACES=321, PETRI_TRANSITIONS=430} [2024-06-03 20:10:11,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-03 20:10:11,096 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 430 transitions, 6381 flow [2024-06-03 20:10:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:11,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:11,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:11,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:10:11,096 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:11,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1092797797, now seen corresponding path program 1 times [2024-06-03 20:10:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:11,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718079778] [2024-06-03 20:10:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:12,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:12,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718079778] [2024-06-03 20:10:12,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718079778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:12,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:12,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:12,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301465007] [2024-06-03 20:10:12,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:12,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:12,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:12,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:10:12,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 430 transitions, 6381 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:12,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:12,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:10:12,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:13,415 INFO L124 PetriNetUnfolderBase]: 4140/6519 cut-off events. [2024-06-03 20:10:13,415 INFO L125 PetriNetUnfolderBase]: For 536873/536875 co-relation queries the response was YES. [2024-06-03 20:10:13,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48969 conditions, 6519 events. 4140/6519 cut-off events. For 536873/536875 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 39306 event pairs, 1044 based on Foata normal form. 3/6485 useless extension candidates. Maximal degree in co-relation 48811. Up to 6303 conditions per place. [2024-06-03 20:10:13,504 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 353 selfloop transitions, 35 changer transitions 0/439 dead transitions. [2024-06-03 20:10:13,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 439 transitions, 7181 flow [2024-06-03 20:10:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:10:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:10:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-03 20:10:13,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:10:13,506 INFO L175 Difference]: Start difference. First operand has 321 places, 430 transitions, 6381 flow. Second operand 6 states and 96 transitions. [2024-06-03 20:10:13,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 439 transitions, 7181 flow [2024-06-03 20:10:15,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 439 transitions, 7047 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 20:10:15,447 INFO L231 Difference]: Finished difference. Result has 324 places, 430 transitions, 6339 flow [2024-06-03 20:10:15,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6339, PETRI_PLACES=324, PETRI_TRANSITIONS=430} [2024-06-03 20:10:15,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-03 20:10:15,448 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 430 transitions, 6339 flow [2024-06-03 20:10:15,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:15,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:15,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:15,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:10:15,449 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)] === [2024-06-03 20:10:15,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 449236430, now seen corresponding path program 6 times [2024-06-03 20:10:15,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:15,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735631732] [2024-06-03 20:10:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:16,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:16,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735631732] [2024-06-03 20:10:16,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735631732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:16,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:16,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:16,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757765369] [2024-06-03 20:10:16,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:16,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:16,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:16,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 430 transitions, 6339 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:16,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:16,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:16,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:17,554 INFO L124 PetriNetUnfolderBase]: 4267/6664 cut-off events. [2024-06-03 20:10:17,554 INFO L125 PetriNetUnfolderBase]: For 532608/532608 co-relation queries the response was YES. [2024-06-03 20:10:17,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49756 conditions, 6664 events. 4267/6664 cut-off events. For 532608/532608 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 39686 event pairs, 1074 based on Foata normal form. 2/6664 useless extension candidates. Maximal degree in co-relation 49597. Up to 6622 conditions per place. [2024-06-03 20:10:17,643 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 426 selfloop transitions, 19 changer transitions 0/448 dead transitions. [2024-06-03 20:10:17,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 448 transitions, 7351 flow [2024-06-03 20:10:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-03 20:10:17,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588850174216028 [2024-06-03 20:10:17,644 INFO L175 Difference]: Start difference. First operand has 324 places, 430 transitions, 6339 flow. Second operand 7 states and 103 transitions. [2024-06-03 20:10:17,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 448 transitions, 7351 flow [2024-06-03 20:10:19,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 448 transitions, 7224 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:19,443 INFO L231 Difference]: Finished difference. Result has 327 places, 436 transitions, 6354 flow [2024-06-03 20:10:19,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6354, PETRI_PLACES=327, PETRI_TRANSITIONS=436} [2024-06-03 20:10:19,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-03 20:10:19,443 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 436 transitions, 6354 flow [2024-06-03 20:10:19,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:19,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:19,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:19,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:10:19,444 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)] === [2024-06-03 20:10:19,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1658475272, now seen corresponding path program 1 times [2024-06-03 20:10:19,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:19,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392326804] [2024-06-03 20:10:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:19,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392326804] [2024-06-03 20:10:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392326804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:20,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:20,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:20,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021854399] [2024-06-03 20:10:20,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:20,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:20,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:20,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:20,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 436 transitions, 6354 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) [2024-06-03 20:10:20,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:20,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:20,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:21,767 INFO L124 PetriNetUnfolderBase]: 4287/6693 cut-off events. [2024-06-03 20:10:21,767 INFO L125 PetriNetUnfolderBase]: For 525884/525886 co-relation queries the response was YES. [2024-06-03 20:10:21,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49712 conditions, 6693 events. 4287/6693 cut-off events. For 525884/525886 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 39824 event pairs, 1090 based on Foata normal form. 6/6697 useless extension candidates. Maximal degree in co-relation 49551. Up to 6564 conditions per place. [2024-06-03 20:10:21,860 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 424 selfloop transitions, 33 changer transitions 0/460 dead transitions. [2024-06-03 20:10:21,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 460 transitions, 7562 flow [2024-06-03 20:10:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 20:10:21,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 20:10:21,861 INFO L175 Difference]: Start difference. First operand has 327 places, 436 transitions, 6354 flow. Second operand 7 states and 114 transitions. [2024-06-03 20:10:21,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 460 transitions, 7562 flow [2024-06-03 20:10:24,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 460 transitions, 7532 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-03 20:10:24,152 INFO L231 Difference]: Finished difference. Result has 332 places, 442 transitions, 6494 flow [2024-06-03 20:10:24,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6324, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6494, PETRI_PLACES=332, PETRI_TRANSITIONS=442} [2024-06-03 20:10:24,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-03 20:10:24,152 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 442 transitions, 6494 flow [2024-06-03 20:10:24,152 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) [2024-06-03 20:10:24,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:24,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:24,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:10:24,152 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:24,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1903950838, now seen corresponding path program 2 times [2024-06-03 20:10:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:24,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723537780] [2024-06-03 20:10:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:24,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:24,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:24,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723537780] [2024-06-03 20:10:24,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723537780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:24,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:24,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:24,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426528469] [2024-06-03 20:10:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:24,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:24,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:24,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:25,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:25,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 442 transitions, 6494 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) [2024-06-03 20:10:25,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:25,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:25,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:26,469 INFO L124 PetriNetUnfolderBase]: 4307/6721 cut-off events. [2024-06-03 20:10:26,470 INFO L125 PetriNetUnfolderBase]: For 541736/541738 co-relation queries the response was YES. [2024-06-03 20:10:26,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50503 conditions, 6721 events. 4307/6721 cut-off events. For 541736/541738 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 39978 event pairs, 1084 based on Foata normal form. 6/6725 useless extension candidates. Maximal degree in co-relation 50340. Up to 6604 conditions per place. [2024-06-03 20:10:26,560 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 427 selfloop transitions, 31 changer transitions 0/461 dead transitions. [2024-06-03 20:10:26,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 461 transitions, 7660 flow [2024-06-03 20:10:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:10:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:10:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 20:10:26,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:10:26,561 INFO L175 Difference]: Start difference. First operand has 332 places, 442 transitions, 6494 flow. Second operand 6 states and 102 transitions. [2024-06-03 20:10:26,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 461 transitions, 7660 flow [2024-06-03 20:10:29,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 461 transitions, 7545 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:29,018 INFO L231 Difference]: Finished difference. Result has 334 places, 445 transitions, 6499 flow [2024-06-03 20:10:29,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6395, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6499, PETRI_PLACES=334, PETRI_TRANSITIONS=445} [2024-06-03 20:10:29,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-03 20:10:29,019 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 445 transitions, 6499 flow [2024-06-03 20:10:29,019 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) [2024-06-03 20:10:29,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:29,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:29,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:10:29,019 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:29,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1903956418, now seen corresponding path program 3 times [2024-06-03 20:10:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:29,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080855634] [2024-06-03 20:10:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:29,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:29,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080855634] [2024-06-03 20:10:29,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080855634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:29,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:29,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:29,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955807677] [2024-06-03 20:10:29,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:29,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:29,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:29,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:29,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 445 transitions, 6499 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) [2024-06-03 20:10:29,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:29,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:29,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:31,414 INFO L124 PetriNetUnfolderBase]: 4295/6705 cut-off events. [2024-06-03 20:10:31,414 INFO L125 PetriNetUnfolderBase]: For 541584/541586 co-relation queries the response was YES. [2024-06-03 20:10:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50064 conditions, 6705 events. 4295/6705 cut-off events. For 541584/541586 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39914 event pairs, 1080 based on Foata normal form. 6/6709 useless extension candidates. Maximal degree in co-relation 49900. Up to 6596 conditions per place. [2024-06-03 20:10:31,508 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 427 selfloop transitions, 33 changer transitions 0/463 dead transitions. [2024-06-03 20:10:31,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 463 transitions, 7471 flow [2024-06-03 20:10:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 20:10:31,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 20:10:31,509 INFO L175 Difference]: Start difference. First operand has 334 places, 445 transitions, 6499 flow. Second operand 8 states and 123 transitions. [2024-06-03 20:10:31,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 463 transitions, 7471 flow [2024-06-03 20:10:33,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 463 transitions, 7377 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:33,216 INFO L231 Difference]: Finished difference. Result has 338 places, 445 transitions, 6478 flow [2024-06-03 20:10:33,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6405, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6478, PETRI_PLACES=338, PETRI_TRANSITIONS=445} [2024-06-03 20:10:33,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-03 20:10:33,217 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 445 transitions, 6478 flow [2024-06-03 20:10:33,217 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) [2024-06-03 20:10:33,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:33,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:33,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:10:33,217 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:33,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash 336915805, now seen corresponding path program 1 times [2024-06-03 20:10:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:33,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110835654] [2024-06-03 20:10:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:33,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:33,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:33,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110835654] [2024-06-03 20:10:33,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110835654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:33,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:33,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:33,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950606535] [2024-06-03 20:10:33,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:33,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:33,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:33,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:33,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:34,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:34,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 445 transitions, 6478 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:34,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:34,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:34,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:35,364 INFO L124 PetriNetUnfolderBase]: 4329/6748 cut-off events. [2024-06-03 20:10:35,364 INFO L125 PetriNetUnfolderBase]: For 555869/555877 co-relation queries the response was YES. [2024-06-03 20:10:35,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50759 conditions, 6748 events. 4329/6748 cut-off events. For 555869/555877 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 40224 event pairs, 985 based on Foata normal form. 8/6754 useless extension candidates. Maximal degree in co-relation 50594. Up to 6536 conditions per place. [2024-06-03 20:10:35,458 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 56 changer transitions 0/486 dead transitions. [2024-06-03 20:10:35,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 486 transitions, 8036 flow [2024-06-03 20:10:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:10:35,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 20:10:35,459 INFO L175 Difference]: Start difference. First operand has 338 places, 445 transitions, 6478 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:10:35,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 486 transitions, 8036 flow [2024-06-03 20:10:37,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 486 transitions, 7950 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:10:37,114 INFO L231 Difference]: Finished difference. Result has 341 places, 459 transitions, 6747 flow [2024-06-03 20:10:37,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6747, PETRI_PLACES=341, PETRI_TRANSITIONS=459} [2024-06-03 20:10:37,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-03 20:10:37,114 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 459 transitions, 6747 flow [2024-06-03 20:10:37,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:37,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:37,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:37,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:10:37,114 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:37,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1949015075, now seen corresponding path program 2 times [2024-06-03 20:10:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:37,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198905305] [2024-06-03 20:10:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:37,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:37,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198905305] [2024-06-03 20:10:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198905305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:37,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:37,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301252464] [2024-06-03 20:10:37,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:37,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:37,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:37,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:37,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 459 transitions, 6747 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:37,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:37,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:37,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:39,391 INFO L124 PetriNetUnfolderBase]: 4344/6769 cut-off events. [2024-06-03 20:10:39,391 INFO L125 PetriNetUnfolderBase]: For 573156/573164 co-relation queries the response was YES. [2024-06-03 20:10:39,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51922 conditions, 6769 events. 4344/6769 cut-off events. For 573156/573164 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 40323 event pairs, 1051 based on Foata normal form. 10/6777 useless extension candidates. Maximal degree in co-relation 51754. Up to 6661 conditions per place. [2024-06-03 20:10:39,488 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 45 changer transitions 0/485 dead transitions. [2024-06-03 20:10:39,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 485 transitions, 7870 flow [2024-06-03 20:10:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 20:10:39,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-03 20:10:39,489 INFO L175 Difference]: Start difference. First operand has 341 places, 459 transitions, 6747 flow. Second operand 8 states and 125 transitions. [2024-06-03 20:10:39,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 485 transitions, 7870 flow [2024-06-03 20:10:41,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 485 transitions, 7762 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-03 20:10:41,356 INFO L231 Difference]: Finished difference. Result has 347 places, 465 transitions, 6844 flow [2024-06-03 20:10:41,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6658, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6844, PETRI_PLACES=347, PETRI_TRANSITIONS=465} [2024-06-03 20:10:41,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 20:10:41,357 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 465 transitions, 6844 flow [2024-06-03 20:10:41,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:41,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:41,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:41,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:10:41,357 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:41,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash 514167295, now seen corresponding path program 3 times [2024-06-03 20:10:41,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:41,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748967391] [2024-06-03 20:10:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:41,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:42,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:42,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748967391] [2024-06-03 20:10:42,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748967391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:42,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:42,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:42,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439000866] [2024-06-03 20:10:42,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:42,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:42,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:42,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 465 transitions, 6844 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:42,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:42,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:42,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:43,704 INFO L124 PetriNetUnfolderBase]: 4370/6805 cut-off events. [2024-06-03 20:10:43,704 INFO L125 PetriNetUnfolderBase]: For 594066/594074 co-relation queries the response was YES. [2024-06-03 20:10:43,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52509 conditions, 6805 events. 4370/6805 cut-off events. For 594066/594074 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 40549 event pairs, 1053 based on Foata normal form. 10/6813 useless extension candidates. Maximal degree in co-relation 52338. Up to 6682 conditions per place. [2024-06-03 20:10:43,803 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 51 changer transitions 0/491 dead transitions. [2024-06-03 20:10:43,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 491 transitions, 8144 flow [2024-06-03 20:10:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-03 20:10:43,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:10:43,804 INFO L175 Difference]: Start difference. First operand has 347 places, 465 transitions, 6844 flow. Second operand 9 states and 135 transitions. [2024-06-03 20:10:43,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 491 transitions, 8144 flow [2024-06-03 20:10:46,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 491 transitions, 8050 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:46,484 INFO L231 Difference]: Finished difference. Result has 353 places, 471 transitions, 6984 flow [2024-06-03 20:10:46,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6984, PETRI_PLACES=353, PETRI_TRANSITIONS=471} [2024-06-03 20:10:46,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-03 20:10:46,485 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 471 transitions, 6984 flow [2024-06-03 20:10:46,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:46,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:46,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:46,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:10:46,485 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:46,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1771637291, now seen corresponding path program 1 times [2024-06-03 20:10:46,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:46,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438964880] [2024-06-03 20:10:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:46,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:47,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:47,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438964880] [2024-06-03 20:10:47,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438964880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:47,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:47,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:47,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563587236] [2024-06-03 20:10:47,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:47,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:47,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:47,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:47,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:10:47,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 471 transitions, 6984 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:47,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:47,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:10:47,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:49,200 INFO L124 PetriNetUnfolderBase]: 4264/6683 cut-off events. [2024-06-03 20:10:49,200 INFO L125 PetriNetUnfolderBase]: For 613783/613791 co-relation queries the response was YES. [2024-06-03 20:10:49,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51975 conditions, 6683 events. 4264/6683 cut-off events. For 613783/613791 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 40223 event pairs, 1007 based on Foata normal form. 8/6651 useless extension candidates. Maximal degree in co-relation 51802. Up to 6354 conditions per place. [2024-06-03 20:10:49,294 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 359 selfloop transitions, 79 changer transitions 0/492 dead transitions. [2024-06-03 20:10:49,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 492 transitions, 7946 flow [2024-06-03 20:10:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:10:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:10:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 20:10:49,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 20:10:49,295 INFO L175 Difference]: Start difference. First operand has 353 places, 471 transitions, 6984 flow. Second operand 8 states and 130 transitions. [2024-06-03 20:10:49,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 492 transitions, 7946 flow [2024-06-03 20:10:51,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 492 transitions, 7804 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 20:10:51,637 INFO L231 Difference]: Finished difference. Result has 356 places, 473 transitions, 7046 flow [2024-06-03 20:10:51,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6842, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7046, PETRI_PLACES=356, PETRI_TRANSITIONS=473} [2024-06-03 20:10:51,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-03 20:10:51,638 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 473 transitions, 7046 flow [2024-06-03 20:10:51,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:51,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:51,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:51,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:10:51,639 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:51,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:51,639 INFO L85 PathProgramCache]: Analyzing trace with hash 502554939, now seen corresponding path program 4 times [2024-06-03 20:10:51,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:51,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888264835] [2024-06-03 20:10:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:51,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:52,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:52,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888264835] [2024-06-03 20:10:52,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888264835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:52,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:52,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:52,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317290257] [2024-06-03 20:10:52,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:52,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:52,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:52,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:52,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:52,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:52,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 473 transitions, 7046 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:52,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:52,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:52,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:53,925 INFO L124 PetriNetUnfolderBase]: 4412/6865 cut-off events. [2024-06-03 20:10:53,925 INFO L125 PetriNetUnfolderBase]: For 630307/630315 co-relation queries the response was YES. [2024-06-03 20:10:53,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53618 conditions, 6865 events. 4412/6865 cut-off events. For 630307/630315 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 40893 event pairs, 987 based on Foata normal form. 8/6871 useless extension candidates. Maximal degree in co-relation 53445. Up to 6624 conditions per place. [2024-06-03 20:10:54,022 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 426 selfloop transitions, 73 changer transitions 0/502 dead transitions. [2024-06-03 20:10:54,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 502 transitions, 8562 flow [2024-06-03 20:10:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:10:54,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 20:10:54,023 INFO L175 Difference]: Start difference. First operand has 356 places, 473 transitions, 7046 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:10:54,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 502 transitions, 8562 flow [2024-06-03 20:10:56,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 502 transitions, 8395 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:10:56,381 INFO L231 Difference]: Finished difference. Result has 358 places, 479 transitions, 7155 flow [2024-06-03 20:10:56,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6879, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7155, PETRI_PLACES=358, PETRI_TRANSITIONS=479} [2024-06-03 20:10:56,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-03 20:10:56,382 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 479 transitions, 7155 flow [2024-06-03 20:10:56,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:56,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:56,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:56,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:10:56,382 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:56,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:56,383 INFO L85 PathProgramCache]: Analyzing trace with hash -543725121, now seen corresponding path program 5 times [2024-06-03 20:10:56,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:56,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495175825] [2024-06-03 20:10:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:56,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495175825] [2024-06-03 20:10:57,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495175825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:57,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:57,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:10:57,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948854391] [2024-06-03 20:10:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:10:57,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:10:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:10:57,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:10:57,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 479 transitions, 7155 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:10:57,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:57,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:10:57,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:58,750 INFO L124 PetriNetUnfolderBase]: 4406/6857 cut-off events. [2024-06-03 20:10:58,750 INFO L125 PetriNetUnfolderBase]: For 637159/637167 co-relation queries the response was YES. [2024-06-03 20:10:58,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53553 conditions, 6857 events. 4406/6857 cut-off events. For 637159/637167 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 40909 event pairs, 1055 based on Foata normal form. 10/6865 useless extension candidates. Maximal degree in co-relation 53379. Up to 6737 conditions per place. [2024-06-03 20:10:58,848 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 443 selfloop transitions, 49 changer transitions 0/495 dead transitions. [2024-06-03 20:10:58,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 495 transitions, 8185 flow [2024-06-03 20:10:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:10:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:10:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 20:10:58,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-03 20:10:58,849 INFO L175 Difference]: Start difference. First operand has 358 places, 479 transitions, 7155 flow. Second operand 7 states and 111 transitions. [2024-06-03 20:10:58,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 495 transitions, 8185 flow [2024-06-03 20:11:01,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 495 transitions, 8019 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:01,321 INFO L231 Difference]: Finished difference. Result has 361 places, 479 transitions, 7101 flow [2024-06-03 20:11:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6989, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7101, PETRI_PLACES=361, PETRI_TRANSITIONS=479} [2024-06-03 20:11:01,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-03 20:11:01,322 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 479 transitions, 7101 flow [2024-06-03 20:11:01,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:01,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:01,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:01,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:11:01,322 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:01,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash -315943941, now seen corresponding path program 6 times [2024-06-03 20:11:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384290415] [2024-06-03 20:11:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:02,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:02,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384290415] [2024-06-03 20:11:02,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384290415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:02,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:02,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:02,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941516841] [2024-06-03 20:11:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:02,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:02,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:02,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:02,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:02,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 479 transitions, 7101 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:02,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:02,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:02,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:03,562 INFO L124 PetriNetUnfolderBase]: 4416/6875 cut-off events. [2024-06-03 20:11:03,563 INFO L125 PetriNetUnfolderBase]: For 638962/638964 co-relation queries the response was YES. [2024-06-03 20:11:03,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53453 conditions, 6875 events. 4416/6875 cut-off events. For 638962/638964 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 40987 event pairs, 1083 based on Foata normal form. 4/6877 useless extension candidates. Maximal degree in co-relation 53279. Up to 6786 conditions per place. [2024-06-03 20:11:03,666 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 470 selfloop transitions, 27 changer transitions 0/500 dead transitions. [2024-06-03 20:11:03,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 500 transitions, 8370 flow [2024-06-03 20:11:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 20:11:03,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:11:03,667 INFO L175 Difference]: Start difference. First operand has 361 places, 479 transitions, 7101 flow. Second operand 7 states and 112 transitions. [2024-06-03 20:11:03,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 500 transitions, 8370 flow [2024-06-03 20:11:06,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 500 transitions, 8294 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:06,223 INFO L231 Difference]: Finished difference. Result has 363 places, 482 transitions, 7142 flow [2024-06-03 20:11:06,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7142, PETRI_PLACES=363, PETRI_TRANSITIONS=482} [2024-06-03 20:11:06,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-03 20:11:06,223 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 482 transitions, 7142 flow [2024-06-03 20:11:06,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:06,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:06,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:06,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:11:06,224 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:06,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:06,224 INFO L85 PathProgramCache]: Analyzing trace with hash -304516101, now seen corresponding path program 7 times [2024-06-03 20:11:06,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:06,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882961205] [2024-06-03 20:11:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:06,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:06,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:06,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882961205] [2024-06-03 20:11:06,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882961205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:06,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:06,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:06,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773885372] [2024-06-03 20:11:06,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:06,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:06,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:06,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:06,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:07,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:07,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 482 transitions, 7142 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:07,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:07,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:07,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:08,491 INFO L124 PetriNetUnfolderBase]: 4426/6889 cut-off events. [2024-06-03 20:11:08,491 INFO L125 PetriNetUnfolderBase]: For 653201/653203 co-relation queries the response was YES. [2024-06-03 20:11:08,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53723 conditions, 6889 events. 4426/6889 cut-off events. For 653201/653203 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 41110 event pairs, 1090 based on Foata normal form. 4/6891 useless extension candidates. Maximal degree in co-relation 53548. Up to 6831 conditions per place. [2024-06-03 20:11:08,592 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 473 selfloop transitions, 23 changer transitions 0/499 dead transitions. [2024-06-03 20:11:08,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 499 transitions, 8242 flow [2024-06-03 20:11:08,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-03 20:11:08,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-03 20:11:08,593 INFO L175 Difference]: Start difference. First operand has 363 places, 482 transitions, 7142 flow. Second operand 7 states and 106 transitions. [2024-06-03 20:11:08,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 499 transitions, 8242 flow [2024-06-03 20:11:11,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 499 transitions, 8088 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:11,072 INFO L231 Difference]: Finished difference. Result has 365 places, 486 transitions, 7118 flow [2024-06-03 20:11:11,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7004, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7118, PETRI_PLACES=365, PETRI_TRANSITIONS=486} [2024-06-03 20:11:11,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-03 20:11:11,073 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 486 transitions, 7118 flow [2024-06-03 20:11:11,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:11,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:11,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:11,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:11:11,073 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:11,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1107315747, now seen corresponding path program 8 times [2024-06-03 20:11:11,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:11,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818234244] [2024-06-03 20:11:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:11,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:11,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818234244] [2024-06-03 20:11:11,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818234244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:11,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:11,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:11,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442516626] [2024-06-03 20:11:11,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:11,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:11,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:11,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:11,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 486 transitions, 7118 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:11,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:11,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:11,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:13,368 INFO L124 PetriNetUnfolderBase]: 4414/6869 cut-off events. [2024-06-03 20:11:13,368 INFO L125 PetriNetUnfolderBase]: For 657068/657076 co-relation queries the response was YES. [2024-06-03 20:11:13,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53293 conditions, 6869 events. 4414/6869 cut-off events. For 657068/657076 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 41006 event pairs, 977 based on Foata normal form. 12/6879 useless extension candidates. Maximal degree in co-relation 53118. Up to 6697 conditions per place. [2024-06-03 20:11:13,473 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 52 changer transitions 0/510 dead transitions. [2024-06-03 20:11:13,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 510 transitions, 8372 flow [2024-06-03 20:11:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:11:13,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-03 20:11:13,474 INFO L175 Difference]: Start difference. First operand has 365 places, 486 transitions, 7118 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:11:13,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 510 transitions, 8372 flow [2024-06-03 20:11:16,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 510 transitions, 8244 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 20:11:16,392 INFO L231 Difference]: Finished difference. Result has 368 places, 486 transitions, 7112 flow [2024-06-03 20:11:16,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6990, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7112, PETRI_PLACES=368, PETRI_TRANSITIONS=486} [2024-06-03 20:11:16,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-03 20:11:16,392 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 486 transitions, 7112 flow [2024-06-03 20:11:16,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:16,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:16,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:16,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:11:16,393 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:16,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1107078597, now seen corresponding path program 9 times [2024-06-03 20:11:16,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:16,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52037699] [2024-06-03 20:11:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:16,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:17,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52037699] [2024-06-03 20:11:17,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52037699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:17,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:17,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:11:17,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535505438] [2024-06-03 20:11:17,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:17,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:11:17,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:11:17,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:11:17,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:17,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 486 transitions, 7112 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:17,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:17,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:17,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:18,687 INFO L124 PetriNetUnfolderBase]: 4408/6865 cut-off events. [2024-06-03 20:11:18,688 INFO L125 PetriNetUnfolderBase]: For 658123/658125 co-relation queries the response was YES. [2024-06-03 20:11:18,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53273 conditions, 6865 events. 4408/6865 cut-off events. For 658123/658125 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40987 event pairs, 1078 based on Foata normal form. 4/6867 useless extension candidates. Maximal degree in co-relation 53097. Up to 6792 conditions per place. [2024-06-03 20:11:18,795 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 475 selfloop transitions, 23 changer transitions 0/501 dead transitions. [2024-06-03 20:11:18,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 501 transitions, 8150 flow [2024-06-03 20:11:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-03 20:11:18,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:11:18,798 INFO L175 Difference]: Start difference. First operand has 368 places, 486 transitions, 7112 flow. Second operand 6 states and 99 transitions. [2024-06-03 20:11:18,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 501 transitions, 8150 flow [2024-06-03 20:11:21,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 501 transitions, 8000 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:21,389 INFO L231 Difference]: Finished difference. Result has 367 places, 486 transitions, 7018 flow [2024-06-03 20:11:21,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6962, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7018, PETRI_PLACES=367, PETRI_TRANSITIONS=486} [2024-06-03 20:11:21,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-03 20:11:21,390 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 486 transitions, 7018 flow [2024-06-03 20:11:21,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-03 20:11:21,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:21,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:21,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:11:21,391 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:21,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash 483007715, now seen corresponding path program 1 times [2024-06-03 20:11:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:21,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769207259] [2024-06-03 20:11:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:22,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:22,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769207259] [2024-06-03 20:11:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769207259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:22,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:22,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724471658] [2024-06-03 20:11:22,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:22,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:22,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:22,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 486 transitions, 7018 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:22,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:22,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:22,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:24,137 INFO L124 PetriNetUnfolderBase]: 4383/6821 cut-off events. [2024-06-03 20:11:24,137 INFO L125 PetriNetUnfolderBase]: For 649549/649549 co-relation queries the response was YES. [2024-06-03 20:11:24,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52716 conditions, 6821 events. 4383/6821 cut-off events. For 649549/649549 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40593 event pairs, 1064 based on Foata normal form. 1/6820 useless extension candidates. Maximal degree in co-relation 52541. Up to 6773 conditions per place. [2024-06-03 20:11:24,229 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 471 selfloop transitions, 24 changer transitions 0/498 dead transitions. [2024-06-03 20:11:24,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 498 transitions, 8050 flow [2024-06-03 20:11:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-03 20:11:24,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588850174216028 [2024-06-03 20:11:24,230 INFO L175 Difference]: Start difference. First operand has 367 places, 486 transitions, 7018 flow. Second operand 7 states and 103 transitions. [2024-06-03 20:11:24,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 498 transitions, 8050 flow [2024-06-03 20:11:26,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 498 transitions, 7944 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:26,478 INFO L231 Difference]: Finished difference. Result has 366 places, 486 transitions, 6970 flow [2024-06-03 20:11:26,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6912, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6970, PETRI_PLACES=366, PETRI_TRANSITIONS=486} [2024-06-03 20:11:26,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-03 20:11:26,479 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 486 transitions, 6970 flow [2024-06-03 20:11:26,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:26,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:26,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:26,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:11:26,480 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:26,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1041845043, now seen corresponding path program 2 times [2024-06-03 20:11:26,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:26,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182682535] [2024-06-03 20:11:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:27,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:27,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182682535] [2024-06-03 20:11:27,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182682535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:27,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:27,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:27,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640566006] [2024-06-03 20:11:27,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:27,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:27,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:27,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:27,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:11:27,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 486 transitions, 6970 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:27,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:27,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:11:27,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:29,081 INFO L124 PetriNetUnfolderBase]: 4267/6692 cut-off events. [2024-06-03 20:11:29,082 INFO L125 PetriNetUnfolderBase]: For 644792/644796 co-relation queries the response was YES. [2024-06-03 20:11:29,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51598 conditions, 6692 events. 4267/6692 cut-off events. For 644792/644796 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 40316 event pairs, 1041 based on Foata normal form. 4/6662 useless extension candidates. Maximal degree in co-relation 51424. Up to 6459 conditions per place. [2024-06-03 20:11:29,183 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 408 selfloop transitions, 37 changer transitions 0/499 dead transitions. [2024-06-03 20:11:29,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 499 transitions, 7926 flow [2024-06-03 20:11:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 20:11:29,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 20:11:29,184 INFO L175 Difference]: Start difference. First operand has 366 places, 486 transitions, 6970 flow. Second operand 7 states and 108 transitions. [2024-06-03 20:11:29,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 499 transitions, 7926 flow [2024-06-03 20:11:31,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 499 transitions, 7708 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:31,719 INFO L231 Difference]: Finished difference. Result has 366 places, 488 transitions, 6878 flow [2024-06-03 20:11:31,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6752, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6878, PETRI_PLACES=366, PETRI_TRANSITIONS=488} [2024-06-03 20:11:31,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-03 20:11:31,720 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 488 transitions, 6878 flow [2024-06-03 20:11:31,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:31,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:31,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:31,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:11:31,720 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:31,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash 69701269, now seen corresponding path program 3 times [2024-06-03 20:11:31,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:31,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650688964] [2024-06-03 20:11:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:31,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:32,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:32,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650688964] [2024-06-03 20:11:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650688964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:32,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:32,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:32,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554666162] [2024-06-03 20:11:32,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:32,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:32,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:32,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:11:32,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 488 transitions, 6878 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:32,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:32,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:11:32,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:34,306 INFO L124 PetriNetUnfolderBase]: 4293/6724 cut-off events. [2024-06-03 20:11:34,306 INFO L125 PetriNetUnfolderBase]: For 644195/644201 co-relation queries the response was YES. [2024-06-03 20:11:34,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51917 conditions, 6724 events. 4293/6724 cut-off events. For 644195/644201 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40471 event pairs, 1007 based on Foata normal form. 8/6702 useless extension candidates. Maximal degree in co-relation 51744. Up to 6382 conditions per place. [2024-06-03 20:11:34,405 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 374 selfloop transitions, 80 changer transitions 0/508 dead transitions. [2024-06-03 20:11:34,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 508 transitions, 7878 flow [2024-06-03 20:11:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 20:11:34,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 20:11:34,406 INFO L175 Difference]: Start difference. First operand has 366 places, 488 transitions, 6878 flow. Second operand 7 states and 118 transitions. [2024-06-03 20:11:34,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 508 transitions, 7878 flow [2024-06-03 20:11:36,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 508 transitions, 7778 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:36,730 INFO L231 Difference]: Finished difference. Result has 368 places, 490 transitions, 6997 flow [2024-06-03 20:11:36,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6778, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6997, PETRI_PLACES=368, PETRI_TRANSITIONS=490} [2024-06-03 20:11:36,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-03 20:11:36,731 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 490 transitions, 6997 flow [2024-06-03 20:11:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:36,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:36,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:36,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:11:36,732 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:36,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 483483379, now seen corresponding path program 4 times [2024-06-03 20:11:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712221998] [2024-06-03 20:11:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:36,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:37,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:37,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712221998] [2024-06-03 20:11:37,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712221998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:37,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:37,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:37,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932251762] [2024-06-03 20:11:37,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:37,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:37,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:37,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:37,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:37,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-03 20:11:37,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 490 transitions, 6997 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:37,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:37,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-03 20:11:37,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:39,426 INFO L124 PetriNetUnfolderBase]: 4276/6707 cut-off events. [2024-06-03 20:11:39,426 INFO L125 PetriNetUnfolderBase]: For 645845/645852 co-relation queries the response was YES. [2024-06-03 20:11:39,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51703 conditions, 6707 events. 4276/6707 cut-off events. For 645845/645852 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 40442 event pairs, 1037 based on Foata normal form. 7/6684 useless extension candidates. Maximal degree in co-relation 51529. Up to 6486 conditions per place. [2024-06-03 20:11:39,520 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 426 selfloop transitions, 23 changer transitions 0/503 dead transitions. [2024-06-03 20:11:39,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 503 transitions, 7967 flow [2024-06-03 20:11:39,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-03 20:11:39,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-03 20:11:39,521 INFO L175 Difference]: Start difference. First operand has 368 places, 490 transitions, 6997 flow. Second operand 7 states and 107 transitions. [2024-06-03 20:11:39,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 503 transitions, 7967 flow [2024-06-03 20:11:41,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 503 transitions, 7774 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:41,668 INFO L231 Difference]: Finished difference. Result has 370 places, 492 transitions, 6905 flow [2024-06-03 20:11:41,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6808, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6905, PETRI_PLACES=370, PETRI_TRANSITIONS=492} [2024-06-03 20:11:41,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-03 20:11:41,668 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 492 transitions, 6905 flow [2024-06-03 20:11:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:41,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:41,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:41,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:11:41,669 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:41,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1001904357, now seen corresponding path program 1 times [2024-06-03 20:11:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:41,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347714686] [2024-06-03 20:11:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:41,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:42,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:42,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347714686] [2024-06-03 20:11:42,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347714686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:42,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:42,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140717640] [2024-06-03 20:11:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:42,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:42,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:42,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 492 transitions, 6905 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:42,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:42,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:42,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:44,655 INFO L124 PetriNetUnfolderBase]: 4413/6868 cut-off events. [2024-06-03 20:11:44,655 INFO L125 PetriNetUnfolderBase]: For 638336/638338 co-relation queries the response was YES. [2024-06-03 20:11:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52551 conditions, 6868 events. 4413/6868 cut-off events. For 638336/638338 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 40940 event pairs, 1034 based on Foata normal form. 4/6870 useless extension candidates. Maximal degree in co-relation 52376. Up to 6762 conditions per place. [2024-06-03 20:11:44,737 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 481 selfloop transitions, 30 changer transitions 0/514 dead transitions. [2024-06-03 20:11:44,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 514 transitions, 8215 flow [2024-06-03 20:11:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 20:11:44,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-03 20:11:44,739 INFO L175 Difference]: Start difference. First operand has 370 places, 492 transitions, 6905 flow. Second operand 7 states and 111 transitions. [2024-06-03 20:11:44,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 514 transitions, 8215 flow [2024-06-03 20:11:46,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 514 transitions, 8134 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:47,000 INFO L231 Difference]: Finished difference. Result has 372 places, 496 transitions, 6965 flow [2024-06-03 20:11:47,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6824, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6965, PETRI_PLACES=372, PETRI_TRANSITIONS=496} [2024-06-03 20:11:47,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-03 20:11:47,001 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 496 transitions, 6965 flow [2024-06-03 20:11:47,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:47,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:47,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:47,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:11:47,001 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:47,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash -304622493, now seen corresponding path program 2 times [2024-06-03 20:11:47,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:47,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60418064] [2024-06-03 20:11:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:47,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60418064] [2024-06-03 20:11:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60418064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096968707] [2024-06-03 20:11:48,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:48,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:48,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 496 transitions, 6965 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-03 20:11:48,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:48,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:48,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:49,833 INFO L124 PetriNetUnfolderBase]: 4421/6880 cut-off events. [2024-06-03 20:11:49,834 INFO L125 PetriNetUnfolderBase]: For 652093/652095 co-relation queries the response was YES. [2024-06-03 20:11:49,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52825 conditions, 6880 events. 4421/6880 cut-off events. For 652093/652095 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41038 event pairs, 1073 based on Foata normal form. 4/6882 useless extension candidates. Maximal degree in co-relation 52649. Up to 6805 conditions per place. [2024-06-03 20:11:49,933 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 480 selfloop transitions, 28 changer transitions 0/511 dead transitions. [2024-06-03 20:11:49,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 511 transitions, 8053 flow [2024-06-03 20:11:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:11:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:11:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-03 20:11:49,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-03 20:11:49,935 INFO L175 Difference]: Start difference. First operand has 372 places, 496 transitions, 6965 flow. Second operand 7 states and 107 transitions. [2024-06-03 20:11:49,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 511 transitions, 8053 flow [2024-06-03 20:11:51,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 511 transitions, 7966 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 20:11:51,772 INFO L231 Difference]: Finished difference. Result has 376 places, 498 transitions, 6983 flow [2024-06-03 20:11:51,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6892, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6983, PETRI_PLACES=376, PETRI_TRANSITIONS=498} [2024-06-03 20:11:51,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-03 20:11:51,772 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 498 transitions, 6983 flow [2024-06-03 20:11:51,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-03 20:11:51,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:51,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:51,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:11:51,772 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:51,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1107069669, now seen corresponding path program 3 times [2024-06-03 20:11:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:51,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360158604] [2024-06-03 20:11:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360158604] [2024-06-03 20:11:53,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360158604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:53,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:53,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:53,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279750984] [2024-06-03 20:11:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:53,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:53,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 498 transitions, 6983 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-03 20:11:53,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:53,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:53,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:54,745 INFO L124 PetriNetUnfolderBase]: 4416/6873 cut-off events. [2024-06-03 20:11:54,745 INFO L125 PetriNetUnfolderBase]: For 658310/658312 co-relation queries the response was YES. [2024-06-03 20:11:54,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52720 conditions, 6873 events. 4416/6873 cut-off events. For 658310/658312 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 40991 event pairs, 1033 based on Foata normal form. 4/6875 useless extension candidates. Maximal degree in co-relation 52542. Up to 6788 conditions per place. [2024-06-03 20:11:54,844 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 485 selfloop transitions, 25 changer transitions 0/513 dead transitions. [2024-06-03 20:11:54,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 513 transitions, 8041 flow [2024-06-03 20:11:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:11:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:11:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-03 20:11:54,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:11:54,845 INFO L175 Difference]: Start difference. First operand has 376 places, 498 transitions, 6983 flow. Second operand 6 states and 99 transitions. [2024-06-03 20:11:54,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 513 transitions, 8041 flow [2024-06-03 20:11:57,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 513 transitions, 7954 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:57,171 INFO L231 Difference]: Finished difference. Result has 377 places, 498 transitions, 6954 flow [2024-06-03 20:11:57,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6954, PETRI_PLACES=377, PETRI_TRANSITIONS=498} [2024-06-03 20:11:57,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-03 20:11:57,172 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 498 transitions, 6954 flow [2024-06-03 20:11:57,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-03 20:11:57,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:57,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:57,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:11:57,172 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:57,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1725230763, now seen corresponding path program 1 times [2024-06-03 20:11:57,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096516681] [2024-06-03 20:11:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:57,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096516681] [2024-06-03 20:11:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096516681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:58,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:58,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962137387] [2024-06-03 20:11:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:58,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:11:58,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 498 transitions, 6954 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:58,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:58,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:11:58,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:59,557 INFO L124 PetriNetUnfolderBase]: 4450/6916 cut-off events. [2024-06-03 20:11:59,557 INFO L125 PetriNetUnfolderBase]: For 684237/684245 co-relation queries the response was YES. [2024-06-03 20:11:59,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53606 conditions, 6916 events. 4450/6916 cut-off events. For 684237/684245 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 41229 event pairs, 916 based on Foata normal form. 8/6922 useless extension candidates. Maximal degree in co-relation 53427. Up to 6366 conditions per place. [2024-06-03 20:11:59,662 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 421 selfloop transitions, 118 changer transitions 0/542 dead transitions. [2024-06-03 20:11:59,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 542 transitions, 8722 flow [2024-06-03 20:11:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 20:11:59,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-03 20:11:59,663 INFO L175 Difference]: Start difference. First operand has 377 places, 498 transitions, 6954 flow. Second operand 9 states and 156 transitions. [2024-06-03 20:11:59,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 542 transitions, 8722 flow [2024-06-03 20:12:02,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 542 transitions, 8665 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:12:02,250 INFO L231 Difference]: Finished difference. Result has 381 places, 507 transitions, 7373 flow [2024-06-03 20:12:02,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6897, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7373, PETRI_PLACES=381, PETRI_TRANSITIONS=507} [2024-06-03 20:12:02,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-03 20:12:02,250 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 507 transitions, 7373 flow [2024-06-03 20:12:02,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:02,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:02,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:02,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:12:02,250 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:02,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:02,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1725110793, now seen corresponding path program 2 times [2024-06-03 20:12:02,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:02,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929441092] [2024-06-03 20:12:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:02,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:03,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929441092] [2024-06-03 20:12:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929441092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:03,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724894045] [2024-06-03 20:12:03,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:03,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:03,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:03,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:03,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:03,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:03,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 507 transitions, 7373 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:03,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:03,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:03,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:04,735 INFO L124 PetriNetUnfolderBase]: 4465/6937 cut-off events. [2024-06-03 20:12:04,736 INFO L125 PetriNetUnfolderBase]: For 703644/703652 co-relation queries the response was YES. [2024-06-03 20:12:04,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54716 conditions, 6937 events. 4465/6937 cut-off events. For 703644/703652 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 41469 event pairs, 1041 based on Foata normal form. 10/6945 useless extension candidates. Maximal degree in co-relation 54536. Up to 6726 conditions per place. [2024-06-03 20:12:04,838 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 465 selfloop transitions, 72 changer transitions 0/540 dead transitions. [2024-06-03 20:12:04,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 540 transitions, 8641 flow [2024-06-03 20:12:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:12:04,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:12:04,839 INFO L175 Difference]: Start difference. First operand has 381 places, 507 transitions, 7373 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:12:04,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 540 transitions, 8641 flow [2024-06-03 20:12:07,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 540 transitions, 8404 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:07,704 INFO L231 Difference]: Finished difference. Result has 386 places, 513 transitions, 7410 flow [2024-06-03 20:12:07,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7167, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7410, PETRI_PLACES=386, PETRI_TRANSITIONS=513} [2024-06-03 20:12:07,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-03 20:12:07,705 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 513 transitions, 7410 flow [2024-06-03 20:12:07,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:07,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:07,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:07,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:12:07,705 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:07,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash 421757075, now seen corresponding path program 1 times [2024-06-03 20:12:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:07,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764756963] [2024-06-03 20:12:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:08,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:08,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764756963] [2024-06-03 20:12:08,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764756963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:08,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:08,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:08,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170476523] [2024-06-03 20:12:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:08,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:08,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:08,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:08,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:08,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 513 transitions, 7410 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:08,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:08,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:08,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:10,319 INFO L124 PetriNetUnfolderBase]: 4554/7060 cut-off events. [2024-06-03 20:12:10,319 INFO L125 PetriNetUnfolderBase]: For 758761/758769 co-relation queries the response was YES. [2024-06-03 20:12:10,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56367 conditions, 7060 events. 4554/7060 cut-off events. For 758761/758769 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 42082 event pairs, 1019 based on Foata normal form. 12/7070 useless extension candidates. Maximal degree in co-relation 56185. Up to 6272 conditions per place. [2024-06-03 20:12:10,412 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 371 selfloop transitions, 197 changer transitions 0/571 dead transitions. [2024-06-03 20:12:10,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 571 transitions, 9530 flow [2024-06-03 20:12:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:12:10,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 20:12:10,413 INFO L175 Difference]: Start difference. First operand has 386 places, 513 transitions, 7410 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:12:10,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 571 transitions, 9530 flow [2024-06-03 20:12:12,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 571 transitions, 9346 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:12:12,804 INFO L231 Difference]: Finished difference. Result has 390 places, 536 transitions, 7978 flow [2024-06-03 20:12:12,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7226, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7978, PETRI_PLACES=390, PETRI_TRANSITIONS=536} [2024-06-03 20:12:12,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:12:12,805 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 536 transitions, 7978 flow [2024-06-03 20:12:12,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:12,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:12,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:12,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:12:12,805 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:12,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:12,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1547741937, now seen corresponding path program 2 times [2024-06-03 20:12:12,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:12,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439728550] [2024-06-03 20:12:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:13,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:13,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439728550] [2024-06-03 20:12:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439728550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:13,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261709392] [2024-06-03 20:12:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:13,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:13,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:13,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 536 transitions, 7978 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:13,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:13,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:13,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:15,335 INFO L124 PetriNetUnfolderBase]: 4730/7304 cut-off events. [2024-06-03 20:12:15,335 INFO L125 PetriNetUnfolderBase]: For 838683/838691 co-relation queries the response was YES. [2024-06-03 20:12:15,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60497 conditions, 7304 events. 4730/7304 cut-off events. For 838683/838691 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 43567 event pairs, 1014 based on Foata normal form. 12/7314 useless extension candidates. Maximal degree in co-relation 60313. Up to 6408 conditions per place. [2024-06-03 20:12:15,445 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 387 selfloop transitions, 225 changer transitions 0/615 dead transitions. [2024-06-03 20:12:15,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 615 transitions, 10569 flow [2024-06-03 20:12:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:12:15,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-03 20:12:15,446 INFO L175 Difference]: Start difference. First operand has 390 places, 536 transitions, 7978 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:12:15,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 615 transitions, 10569 flow [2024-06-03 20:12:18,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 615 transitions, 10339 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-03 20:12:18,080 INFO L231 Difference]: Finished difference. Result has 398 places, 580 transitions, 8980 flow [2024-06-03 20:12:18,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7792, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8980, PETRI_PLACES=398, PETRI_TRANSITIONS=580} [2024-06-03 20:12:18,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-03 20:12:18,080 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 580 transitions, 8980 flow [2024-06-03 20:12:18,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:18,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:18,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:18,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:12:18,081 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:18,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1720469163, now seen corresponding path program 3 times [2024-06-03 20:12:18,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:18,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574138384] [2024-06-03 20:12:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:18,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:18,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:18,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574138384] [2024-06-03 20:12:18,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574138384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:18,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:18,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:18,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912270311] [2024-06-03 20:12:18,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:18,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:18,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:18,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:18,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:19,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:19,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 580 transitions, 8980 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:19,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:19,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:19,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:20,764 INFO L124 PetriNetUnfolderBase]: 4756/7340 cut-off events. [2024-06-03 20:12:20,764 INFO L125 PetriNetUnfolderBase]: For 855699/855707 co-relation queries the response was YES. [2024-06-03 20:12:20,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61575 conditions, 7340 events. 4756/7340 cut-off events. For 855699/855707 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 43716 event pairs, 1078 based on Foata normal form. 10/7348 useless extension candidates. Maximal degree in co-relation 61387. Up to 7109 conditions per place. [2024-06-03 20:12:20,878 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 527 selfloop transitions, 87 changer transitions 0/617 dead transitions. [2024-06-03 20:12:20,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 617 transitions, 10674 flow [2024-06-03 20:12:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:12:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:12:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-03 20:12:20,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-03 20:12:20,879 INFO L175 Difference]: Start difference. First operand has 398 places, 580 transitions, 8980 flow. Second operand 10 states and 154 transitions. [2024-06-03 20:12:20,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 617 transitions, 10674 flow [2024-06-03 20:12:24,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 617 transitions, 10319 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:24,011 INFO L231 Difference]: Finished difference. Result has 405 places, 590 transitions, 9028 flow [2024-06-03 20:12:24,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8625, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9028, PETRI_PLACES=405, PETRI_TRANSITIONS=590} [2024-06-03 20:12:24,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-03 20:12:24,011 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 590 transitions, 9028 flow [2024-06-03 20:12:24,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:24,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:24,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:24,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:12:24,012 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:24,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:24,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1715029143, now seen corresponding path program 3 times [2024-06-03 20:12:24,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:24,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943651813] [2024-06-03 20:12:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:24,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:24,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:24,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943651813] [2024-06-03 20:12:24,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943651813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:24,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:24,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:24,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779440113] [2024-06-03 20:12:24,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:24,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:24,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:24,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:24,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:24,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:24,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 590 transitions, 9028 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:24,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:24,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:24,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:26,617 INFO L124 PetriNetUnfolderBase]: 4744/7324 cut-off events. [2024-06-03 20:12:26,618 INFO L125 PetriNetUnfolderBase]: For 862333/862341 co-relation queries the response was YES. [2024-06-03 20:12:26,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60772 conditions, 7324 events. 4744/7324 cut-off events. For 862333/862341 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 43639 event pairs, 1022 based on Foata normal form. 12/7334 useless extension candidates. Maximal degree in co-relation 60582. Up to 6436 conditions per place. [2024-06-03 20:12:26,727 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 403 selfloop transitions, 216 changer transitions 0/622 dead transitions. [2024-06-03 20:12:26,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 622 transitions, 10936 flow [2024-06-03 20:12:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:12:26,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-03 20:12:26,728 INFO L175 Difference]: Start difference. First operand has 405 places, 590 transitions, 9028 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:12:26,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 622 transitions, 10936 flow [2024-06-03 20:12:30,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 622 transitions, 10744 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:30,442 INFO L231 Difference]: Finished difference. Result has 410 places, 591 transitions, 9298 flow [2024-06-03 20:12:30,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8836, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9298, PETRI_PLACES=410, PETRI_TRANSITIONS=591} [2024-06-03 20:12:30,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-03 20:12:30,443 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 591 transitions, 9298 flow [2024-06-03 20:12:30,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:30,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:30,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:12:30,443 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:30,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash 333099059, now seen corresponding path program 1 times [2024-06-03 20:12:30,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:30,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102326265] [2024-06-03 20:12:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:30,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:31,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102326265] [2024-06-03 20:12:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102326265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:31,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:31,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:31,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315217117] [2024-06-03 20:12:31,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:31,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:31,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:31,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:31,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:31,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:31,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 591 transitions, 9298 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:31,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:31,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:31,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:33,481 INFO L124 PetriNetUnfolderBase]: 4826/7449 cut-off events. [2024-06-03 20:12:33,481 INFO L125 PetriNetUnfolderBase]: For 934317/934323 co-relation queries the response was YES. [2024-06-03 20:12:33,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62659 conditions, 7449 events. 4826/7449 cut-off events. For 934317/934323 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44417 event pairs, 928 based on Foata normal form. 14/7461 useless extension candidates. Maximal degree in co-relation 62468. Up to 6848 conditions per place. [2024-06-03 20:12:33,586 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 521 selfloop transitions, 113 changer transitions 0/637 dead transitions. [2024-06-03 20:12:33,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 637 transitions, 11005 flow [2024-06-03 20:12:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:12:33,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:12:33,587 INFO L175 Difference]: Start difference. First operand has 410 places, 591 transitions, 9298 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:12:33,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 637 transitions, 11005 flow [2024-06-03 20:12:36,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 637 transitions, 10616 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:36,428 INFO L231 Difference]: Finished difference. Result has 414 places, 596 transitions, 9253 flow [2024-06-03 20:12:36,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8911, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9253, PETRI_PLACES=414, PETRI_TRANSITIONS=596} [2024-06-03 20:12:36,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-03 20:12:36,428 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 596 transitions, 9253 flow [2024-06-03 20:12:36,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:36,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:36,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:36,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:12:36,429 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:36,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:36,429 INFO L85 PathProgramCache]: Analyzing trace with hash 340517669, now seen corresponding path program 2 times [2024-06-03 20:12:36,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:36,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388068463] [2024-06-03 20:12:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:36,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:37,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388068463] [2024-06-03 20:12:37,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388068463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:37,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:37,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:37,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601039695] [2024-06-03 20:12:37,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:37,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:37,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:37,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:37,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 596 transitions, 9253 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:37,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:37,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:37,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:39,153 INFO L124 PetriNetUnfolderBase]: 4870/7517 cut-off events. [2024-06-03 20:12:39,153 INFO L125 PetriNetUnfolderBase]: For 950560/950566 co-relation queries the response was YES. [2024-06-03 20:12:39,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62865 conditions, 7517 events. 4870/7517 cut-off events. For 950560/950566 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 44950 event pairs, 1061 based on Foata normal form. 18/7533 useless extension candidates. Maximal degree in co-relation 62673. Up to 7142 conditions per place. [2024-06-03 20:12:39,265 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 511 selfloop transitions, 117 changer transitions 0/631 dead transitions. [2024-06-03 20:12:39,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 631 transitions, 10682 flow [2024-06-03 20:12:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 20:12:39,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-03 20:12:39,266 INFO L175 Difference]: Start difference. First operand has 414 places, 596 transitions, 9253 flow. Second operand 9 states and 152 transitions. [2024-06-03 20:12:39,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 631 transitions, 10682 flow [2024-06-03 20:12:41,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 631 transitions, 10557 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:12:41,635 INFO L231 Difference]: Finished difference. Result has 419 places, 598 transitions, 9419 flow [2024-06-03 20:12:41,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9128, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9419, PETRI_PLACES=419, PETRI_TRANSITIONS=598} [2024-06-03 20:12:41,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-03 20:12:41,636 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 598 transitions, 9419 flow [2024-06-03 20:12:41,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:41,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:41,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:41,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:12:41,636 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:41,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1806359313, now seen corresponding path program 3 times [2024-06-03 20:12:41,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:41,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997812519] [2024-06-03 20:12:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:41,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:42,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997812519] [2024-06-03 20:12:42,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997812519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:42,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:42,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:42,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120449203] [2024-06-03 20:12:42,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:42,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:42,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:42,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:42,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:42,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 598 transitions, 9419 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:42,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:42,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:42,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:44,431 INFO L124 PetriNetUnfolderBase]: 4975/7680 cut-off events. [2024-06-03 20:12:44,431 INFO L125 PetriNetUnfolderBase]: For 978727/978733 co-relation queries the response was YES. [2024-06-03 20:12:44,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64907 conditions, 7680 events. 4975/7680 cut-off events. For 978727/978733 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 46215 event pairs, 1074 based on Foata normal form. 14/7692 useless extension candidates. Maximal degree in co-relation 64713. Up to 7180 conditions per place. [2024-06-03 20:12:44,559 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 523 selfloop transitions, 115 changer transitions 0/641 dead transitions. [2024-06-03 20:12:44,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 641 transitions, 11108 flow [2024-06-03 20:12:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:12:44,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-03 20:12:44,560 INFO L175 Difference]: Start difference. First operand has 419 places, 598 transitions, 9419 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:12:44,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 641 transitions, 11108 flow [2024-06-03 20:12:48,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 641 transitions, 10854 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:48,658 INFO L231 Difference]: Finished difference. Result has 422 places, 603 transitions, 9491 flow [2024-06-03 20:12:48,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9165, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9491, PETRI_PLACES=422, PETRI_TRANSITIONS=603} [2024-06-03 20:12:48,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-03 20:12:48,659 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 603 transitions, 9491 flow [2024-06-03 20:12:48,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:48,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:48,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:48,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:12:48,659 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:48,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash -299304107, now seen corresponding path program 4 times [2024-06-03 20:12:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:48,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577027693] [2024-06-03 20:12:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:48,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:49,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:49,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577027693] [2024-06-03 20:12:49,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577027693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:49,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:49,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:49,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127626565] [2024-06-03 20:12:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:49,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:49,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:49,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:49,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 603 transitions, 9491 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:49,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:49,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:49,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:51,437 INFO L124 PetriNetUnfolderBase]: 5033/7761 cut-off events. [2024-06-03 20:12:51,437 INFO L125 PetriNetUnfolderBase]: For 1000433/1000441 co-relation queries the response was YES. [2024-06-03 20:12:51,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66617 conditions, 7761 events. 5033/7761 cut-off events. For 1000433/1000441 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 46709 event pairs, 1073 based on Foata normal form. 8/7767 useless extension candidates. Maximal degree in co-relation 66421. Up to 7411 conditions per place. [2024-06-03 20:12:51,563 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 544 selfloop transitions, 101 changer transitions 0/648 dead transitions. [2024-06-03 20:12:51,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 648 transitions, 11541 flow [2024-06-03 20:12:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:12:51,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-03 20:12:51,564 INFO L175 Difference]: Start difference. First operand has 422 places, 603 transitions, 9491 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:12:51,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 648 transitions, 11541 flow [2024-06-03 20:12:55,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 648 transitions, 11406 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:12:55,949 INFO L231 Difference]: Finished difference. Result has 427 places, 615 transitions, 9858 flow [2024-06-03 20:12:55,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9356, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9858, PETRI_PLACES=427, PETRI_TRANSITIONS=615} [2024-06-03 20:12:55,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-03 20:12:55,949 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 615 transitions, 9858 flow [2024-06-03 20:12:55,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:55,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:55,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:55,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:12:55,950 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:55,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash -299184137, now seen corresponding path program 5 times [2024-06-03 20:12:55,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:55,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379969768] [2024-06-03 20:12:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:55,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:56,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:56,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379969768] [2024-06-03 20:12:56,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379969768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:56,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:56,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:56,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578308515] [2024-06-03 20:12:56,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:56,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:56,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:56,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:56,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:12:56,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 615 transitions, 9858 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:56,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:56,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:12:56,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:58,828 INFO L124 PetriNetUnfolderBase]: 5027/7753 cut-off events. [2024-06-03 20:12:58,828 INFO L125 PetriNetUnfolderBase]: For 1011839/1011847 co-relation queries the response was YES. [2024-06-03 20:12:58,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66909 conditions, 7753 events. 5027/7753 cut-off events. For 1011839/1011847 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 46678 event pairs, 1141 based on Foata normal form. 10/7761 useless extension candidates. Maximal degree in co-relation 66710. Up to 7626 conditions per place. [2024-06-03 20:12:58,956 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 583 selfloop transitions, 53 changer transitions 0/639 dead transitions. [2024-06-03 20:12:58,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 639 transitions, 11196 flow [2024-06-03 20:12:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-03 20:12:58,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-03 20:12:58,957 INFO L175 Difference]: Start difference. First operand has 427 places, 615 transitions, 9858 flow. Second operand 9 states and 140 transitions. [2024-06-03 20:12:58,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 639 transitions, 11196 flow [2024-06-03 20:13:02,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 639 transitions, 11030 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:02,629 INFO L231 Difference]: Finished difference. Result has 432 places, 615 transitions, 9804 flow [2024-06-03 20:13:02,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9692, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9804, PETRI_PLACES=432, PETRI_TRANSITIONS=615} [2024-06-03 20:13:02,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-03 20:13:02,630 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 615 transitions, 9804 flow [2024-06-03 20:13:02,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:02,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:02,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:02,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:13:02,630 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:02,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:02,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1848915663, now seen corresponding path program 4 times [2024-06-03 20:13:02,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:02,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140275664] [2024-06-03 20:13:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:03,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:03,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140275664] [2024-06-03 20:13:03,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140275664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:03,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:03,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:03,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434284231] [2024-06-03 20:13:03,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:03,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:03,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:03,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:03,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:03,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:03,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 615 transitions, 9804 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:03,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:03,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:03,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:05,654 INFO L124 PetriNetUnfolderBase]: 5043/7775 cut-off events. [2024-06-03 20:13:05,655 INFO L125 PetriNetUnfolderBase]: For 1040223/1040231 co-relation queries the response was YES. [2024-06-03 20:13:05,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67262 conditions, 7775 events. 5043/7775 cut-off events. For 1040223/1040231 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 46846 event pairs, 1123 based on Foata normal form. 12/7785 useless extension candidates. Maximal degree in co-relation 67061. Up to 7473 conditions per place. [2024-06-03 20:13:05,764 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 539 selfloop transitions, 108 changer transitions 0/650 dead transitions. [2024-06-03 20:13:05,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 650 transitions, 11492 flow [2024-06-03 20:13:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:13:05,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-03 20:13:05,765 INFO L175 Difference]: Start difference. First operand has 432 places, 615 transitions, 9804 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:13:05,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 650 transitions, 11492 flow [2024-06-03 20:13:09,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 650 transitions, 11356 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:13:09,139 INFO L231 Difference]: Finished difference. Result has 436 places, 621 transitions, 10044 flow [2024-06-03 20:13:09,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9668, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10044, PETRI_PLACES=436, PETRI_TRANSITIONS=621} [2024-06-03 20:13:09,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-03 20:13:09,140 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 621 transitions, 10044 flow [2024-06-03 20:13:09,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:09,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:09,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:09,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:13:09,140 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:09,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:09,141 INFO L85 PathProgramCache]: Analyzing trace with hash -275204169, now seen corresponding path program 6 times [2024-06-03 20:13:09,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:09,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429041521] [2024-06-03 20:13:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:09,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:09,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429041521] [2024-06-03 20:13:09,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429041521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:09,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:09,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134496143] [2024-06-03 20:13:09,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:09,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:09,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:09,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:09,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:10,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:10,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 621 transitions, 10044 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:10,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:10,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:10,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:12,144 INFO L124 PetriNetUnfolderBase]: 5053/7789 cut-off events. [2024-06-03 20:13:12,145 INFO L125 PetriNetUnfolderBase]: For 1050718/1050726 co-relation queries the response was YES. [2024-06-03 20:13:12,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67844 conditions, 7789 events. 5053/7789 cut-off events. For 1050718/1050726 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 46891 event pairs, 1065 based on Foata normal form. 8/7795 useless extension candidates. Maximal degree in co-relation 67641. Up to 7438 conditions per place. [2024-06-03 20:13:12,264 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 554 selfloop transitions, 108 changer transitions 0/665 dead transitions. [2024-06-03 20:13:12,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 665 transitions, 11962 flow [2024-06-03 20:13:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:13:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:13:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-03 20:13:12,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-03 20:13:12,265 INFO L175 Difference]: Start difference. First operand has 436 places, 621 transitions, 10044 flow. Second operand 11 states and 182 transitions. [2024-06-03 20:13:12,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 665 transitions, 11962 flow [2024-06-03 20:13:15,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 665 transitions, 11753 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:13:15,859 INFO L231 Difference]: Finished difference. Result has 442 places, 624 transitions, 10129 flow [2024-06-03 20:13:15,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9835, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10129, PETRI_PLACES=442, PETRI_TRANSITIONS=624} [2024-06-03 20:13:15,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-03 20:13:15,859 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 624 transitions, 10129 flow [2024-06-03 20:13:15,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:15,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:15,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:15,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:13:15,860 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:15,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1854456417, now seen corresponding path program 7 times [2024-06-03 20:13:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:15,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070520419] [2024-06-03 20:13:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:15,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:16,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:16,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070520419] [2024-06-03 20:13:16,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070520419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:16,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:16,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:16,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300318509] [2024-06-03 20:13:16,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:16,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:16,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:16,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:16,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 624 transitions, 10129 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:16,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:16,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:16,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:18,792 INFO L124 PetriNetUnfolderBase]: 5063/7803 cut-off events. [2024-06-03 20:13:18,793 INFO L125 PetriNetUnfolderBase]: For 1068900/1068908 co-relation queries the response was YES. [2024-06-03 20:13:18,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68227 conditions, 7803 events. 5063/7803 cut-off events. For 1068900/1068908 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 46984 event pairs, 1066 based on Foata normal form. 8/7809 useless extension candidates. Maximal degree in co-relation 68023. Up to 7448 conditions per place. [2024-06-03 20:13:18,924 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 550 selfloop transitions, 113 changer transitions 0/666 dead transitions. [2024-06-03 20:13:18,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 666 transitions, 11855 flow [2024-06-03 20:13:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:13:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:13:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-03 20:13:18,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:13:18,925 INFO L175 Difference]: Start difference. First operand has 442 places, 624 transitions, 10129 flow. Second operand 12 states and 189 transitions. [2024-06-03 20:13:18,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 666 transitions, 11855 flow [2024-06-03 20:13:22,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 666 transitions, 11549 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-03 20:13:22,537 INFO L231 Difference]: Finished difference. Result has 445 places, 627 transitions, 10133 flow [2024-06-03 20:13:22,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9839, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10133, PETRI_PLACES=445, PETRI_TRANSITIONS=627} [2024-06-03 20:13:22,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-03 20:13:22,537 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 627 transitions, 10133 flow [2024-06-03 20:13:22,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:22,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:22,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:22,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:13:22,538 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:22,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1854456789, now seen corresponding path program 1 times [2024-06-03 20:13:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:22,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214650483] [2024-06-03 20:13:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:22,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:23,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214650483] [2024-06-03 20:13:23,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214650483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:23,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:23,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:23,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676432943] [2024-06-03 20:13:23,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:23,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:23,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:23,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:23,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:23,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 627 transitions, 10133 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:23,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:23,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:23,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:25,301 INFO L124 PetriNetUnfolderBase]: 5115/7875 cut-off events. [2024-06-03 20:13:25,301 INFO L125 PetriNetUnfolderBase]: For 1122689/1122697 co-relation queries the response was YES. [2024-06-03 20:13:25,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69257 conditions, 7875 events. 5115/7875 cut-off events. For 1122689/1122697 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 47429 event pairs, 1085 based on Foata normal form. 10/7883 useless extension candidates. Maximal degree in co-relation 69052. Up to 7308 conditions per place. [2024-06-03 20:13:25,438 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 545 selfloop transitions, 124 changer transitions 0/672 dead transitions. [2024-06-03 20:13:25,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 672 transitions, 12205 flow [2024-06-03 20:13:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:13:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:13:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:13:25,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-03 20:13:25,439 INFO L175 Difference]: Start difference. First operand has 445 places, 627 transitions, 10133 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:13:25,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 672 transitions, 12205 flow [2024-06-03 20:13:29,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 672 transitions, 11961 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-03 20:13:29,246 INFO L231 Difference]: Finished difference. Result has 445 places, 636 transitions, 10335 flow [2024-06-03 20:13:29,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9889, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10335, PETRI_PLACES=445, PETRI_TRANSITIONS=636} [2024-06-03 20:13:29,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-03 20:13:29,247 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 636 transitions, 10335 flow [2024-06-03 20:13:29,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:29,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:29,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:29,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:13:29,247 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:29,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1858170093, now seen corresponding path program 5 times [2024-06-03 20:13:29,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:29,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994631918] [2024-06-03 20:13:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:29,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:30,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:30,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994631918] [2024-06-03 20:13:30,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994631918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:30,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:30,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:30,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659016028] [2024-06-03 20:13:30,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:30,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:30,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:30,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:30,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:30,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 636 transitions, 10335 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:30,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:30,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:30,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:32,180 INFO L124 PetriNetUnfolderBase]: 5185/7973 cut-off events. [2024-06-03 20:13:32,180 INFO L125 PetriNetUnfolderBase]: For 1156529/1156537 co-relation queries the response was YES. [2024-06-03 20:13:32,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70847 conditions, 7973 events. 5185/7973 cut-off events. For 1156529/1156537 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 47951 event pairs, 1127 based on Foata normal form. 12/7983 useless extension candidates. Maximal degree in co-relation 70641. Up to 7625 conditions per place. [2024-06-03 20:13:32,307 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 563 selfloop transitions, 125 changer transitions 0/691 dead transitions. [2024-06-03 20:13:32,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 691 transitions, 12577 flow [2024-06-03 20:13:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:13:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:13:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-03 20:13:32,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-03 20:13:32,308 INFO L175 Difference]: Start difference. First operand has 445 places, 636 transitions, 10335 flow. Second operand 11 states and 182 transitions. [2024-06-03 20:13:32,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 691 transitions, 12577 flow [2024-06-03 20:13:35,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 691 transitions, 12424 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:35,946 INFO L231 Difference]: Finished difference. Result has 453 places, 655 transitions, 10781 flow [2024-06-03 20:13:35,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10185, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10781, PETRI_PLACES=453, PETRI_TRANSITIONS=655} [2024-06-03 20:13:35,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-03 20:13:35,947 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 655 transitions, 10781 flow [2024-06-03 20:13:35,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:35,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:35,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:35,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:13:35,947 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:35,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1858181253, now seen corresponding path program 6 times [2024-06-03 20:13:35,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:35,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786593562] [2024-06-03 20:13:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:35,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:36,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786593562] [2024-06-03 20:13:36,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786593562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:36,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:36,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336368885] [2024-06-03 20:13:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:36,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:36,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:36,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:36,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 655 transitions, 10781 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:36,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:36,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:36,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:39,266 INFO L124 PetriNetUnfolderBase]: 5175/7959 cut-off events. [2024-06-03 20:13:39,266 INFO L125 PetriNetUnfolderBase]: For 1157745/1157753 co-relation queries the response was YES. [2024-06-03 20:13:39,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70891 conditions, 7959 events. 5175/7959 cut-off events. For 1157745/1157753 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 47868 event pairs, 1132 based on Foata normal form. 10/7967 useless extension candidates. Maximal degree in co-relation 70682. Up to 7617 conditions per place. [2024-06-03 20:13:39,388 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 558 selfloop transitions, 130 changer transitions 0/691 dead transitions. [2024-06-03 20:13:39,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 691 transitions, 12501 flow [2024-06-03 20:13:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:13:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:13:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-03 20:13:39,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:13:39,389 INFO L175 Difference]: Start difference. First operand has 453 places, 655 transitions, 10781 flow. Second operand 12 states and 189 transitions. [2024-06-03 20:13:39,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 691 transitions, 12501 flow [2024-06-03 20:13:43,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 691 transitions, 12199 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:13:43,345 INFO L231 Difference]: Finished difference. Result has 458 places, 656 transitions, 10767 flow [2024-06-03 20:13:43,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10479, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10767, PETRI_PLACES=458, PETRI_TRANSITIONS=656} [2024-06-03 20:13:43,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-03 20:13:43,346 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 656 transitions, 10767 flow [2024-06-03 20:13:43,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:43,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:43,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:43,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:13:43,346 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:43,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:43,347 INFO L85 PathProgramCache]: Analyzing trace with hash -289918175, now seen corresponding path program 2 times [2024-06-03 20:13:43,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:43,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622202267] [2024-06-03 20:13:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:43,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:44,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622202267] [2024-06-03 20:13:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622202267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:44,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:44,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075205605] [2024-06-03 20:13:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:44,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:44,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:44,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:44,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 656 transitions, 10767 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:44,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:44,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:44,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:46,472 INFO L124 PetriNetUnfolderBase]: 5227/8031 cut-off events. [2024-06-03 20:13:46,472 INFO L125 PetriNetUnfolderBase]: For 1213038/1213046 co-relation queries the response was YES. [2024-06-03 20:13:46,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71934 conditions, 8031 events. 5227/8031 cut-off events. For 1213038/1213046 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 48309 event pairs, 1142 based on Foata normal form. 12/8041 useless extension candidates. Maximal degree in co-relation 71724. Up to 7778 conditions per place. [2024-06-03 20:13:46,613 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 598 selfloop transitions, 92 changer transitions 0/693 dead transitions. [2024-06-03 20:13:46,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 693 transitions, 12549 flow [2024-06-03 20:13:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:13:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:13:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-03 20:13:46,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376940133037694 [2024-06-03 20:13:46,614 INFO L175 Difference]: Start difference. First operand has 458 places, 656 transitions, 10767 flow. Second operand 11 states and 170 transitions. [2024-06-03 20:13:46,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 693 transitions, 12549 flow [2024-06-03 20:13:50,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 693 transitions, 12322 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:13:50,940 INFO L231 Difference]: Finished difference. Result has 461 places, 662 transitions, 10832 flow [2024-06-03 20:13:50,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10540, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10832, PETRI_PLACES=461, PETRI_TRANSITIONS=662} [2024-06-03 20:13:50,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-03 20:13:50,940 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 662 transitions, 10832 flow [2024-06-03 20:13:50,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:50,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:50,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:50,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:13:50,941 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:50,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:50,941 INFO L85 PathProgramCache]: Analyzing trace with hash -289924127, now seen corresponding path program 8 times [2024-06-03 20:13:50,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:50,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370662720] [2024-06-03 20:13:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:50,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:51,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:51,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370662720] [2024-06-03 20:13:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370662720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:51,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:51,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:51,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855551977] [2024-06-03 20:13:51,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:51,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:51,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:51,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:51,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:51,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 662 transitions, 10832 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:51,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:51,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:51,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:54,089 INFO L124 PetriNetUnfolderBase]: 5253/8067 cut-off events. [2024-06-03 20:13:54,089 INFO L125 PetriNetUnfolderBase]: For 1235190/1235198 co-relation queries the response was YES. [2024-06-03 20:13:54,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72659 conditions, 8067 events. 5253/8067 cut-off events. For 1235190/1235198 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 48547 event pairs, 1169 based on Foata normal form. 10/8075 useless extension candidates. Maximal degree in co-relation 72448. Up to 7916 conditions per place. [2024-06-03 20:13:54,225 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 628 selfloop transitions, 66 changer transitions 0/697 dead transitions. [2024-06-03 20:13:54,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 697 transitions, 12669 flow [2024-06-03 20:13:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:13:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:13:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2024-06-03 20:13:54,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:13:54,226 INFO L175 Difference]: Start difference. First operand has 461 places, 662 transitions, 10832 flow. Second operand 11 states and 165 transitions. [2024-06-03 20:13:54,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 697 transitions, 12669 flow [2024-06-03 20:13:58,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 697 transitions, 12510 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:13:58,838 INFO L231 Difference]: Finished difference. Result has 466 places, 669 transitions, 10994 flow [2024-06-03 20:13:58,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10673, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10994, PETRI_PLACES=466, PETRI_TRANSITIONS=669} [2024-06-03 20:13:58,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-03 20:13:58,839 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 669 transitions, 10994 flow [2024-06-03 20:13:58,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:58,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:58,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:58,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:13:58,839 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:58,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash -289929707, now seen corresponding path program 9 times [2024-06-03 20:13:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:58,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730782950] [2024-06-03 20:13:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:58,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730782950] [2024-06-03 20:13:59,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730782950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:59,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:59,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:13:59,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378894098] [2024-06-03 20:13:59,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:59,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:13:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:59,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:13:59,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:13:59,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:13:59,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 669 transitions, 10994 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:59,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:59,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:13:59,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:02,214 INFO L124 PetriNetUnfolderBase]: 5247/8059 cut-off events. [2024-06-03 20:14:02,214 INFO L125 PetriNetUnfolderBase]: For 1242266/1242274 co-relation queries the response was YES. [2024-06-03 20:14:02,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72606 conditions, 8059 events. 5247/8059 cut-off events. For 1242266/1242274 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 48479 event pairs, 1170 based on Foata normal form. 10/8067 useless extension candidates. Maximal degree in co-relation 72392. Up to 7911 conditions per place. [2024-06-03 20:14:02,355 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 630 selfloop transitions, 66 changer transitions 0/699 dead transitions. [2024-06-03 20:14:02,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 699 transitions, 12472 flow [2024-06-03 20:14:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:14:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:14:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 187 transitions. [2024-06-03 20:14:02,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.350844277673546 [2024-06-03 20:14:02,356 INFO L175 Difference]: Start difference. First operand has 466 places, 669 transitions, 10994 flow. Second operand 13 states and 187 transitions. [2024-06-03 20:14:02,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 699 transitions, 12472 flow [2024-06-03 20:14:07,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 699 transitions, 12281 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:07,689 INFO L231 Difference]: Finished difference. Result has 473 places, 669 transitions, 10941 flow [2024-06-03 20:14:07,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10803, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10941, PETRI_PLACES=473, PETRI_TRANSITIONS=669} [2024-06-03 20:14:07,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-03 20:14:07,689 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 669 transitions, 10941 flow [2024-06-03 20:14:07,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:07,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:07,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:07,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:14:07,690 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:07,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:07,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1858175859, now seen corresponding path program 3 times [2024-06-03 20:14:07,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:07,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590452558] [2024-06-03 20:14:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:07,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:08,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:08,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590452558] [2024-06-03 20:14:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590452558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:08,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:08,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107468859] [2024-06-03 20:14:08,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:08,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:08,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:08,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:08,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 669 transitions, 10941 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:08,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:08,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:08,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:10,818 INFO L124 PetriNetUnfolderBase]: 5235/8043 cut-off events. [2024-06-03 20:14:10,818 INFO L125 PetriNetUnfolderBase]: For 1251551/1251559 co-relation queries the response was YES. [2024-06-03 20:14:10,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72158 conditions, 8043 events. 5235/8043 cut-off events. For 1251551/1251559 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 48409 event pairs, 1136 based on Foata normal form. 12/8053 useless extension candidates. Maximal degree in co-relation 71943. Up to 7798 conditions per place. [2024-06-03 20:14:10,974 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 602 selfloop transitions, 91 changer transitions 0/696 dead transitions. [2024-06-03 20:14:10,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 696 transitions, 12411 flow [2024-06-03 20:14:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:14:10,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-03 20:14:10,976 INFO L175 Difference]: Start difference. First operand has 473 places, 669 transitions, 10941 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:14:10,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 696 transitions, 12411 flow [2024-06-03 20:14:15,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 696 transitions, 12226 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-03 20:14:15,779 INFO L231 Difference]: Finished difference. Result has 469 places, 669 transitions, 10944 flow [2024-06-03 20:14:15,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10756, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10944, PETRI_PLACES=469, PETRI_TRANSITIONS=669} [2024-06-03 20:14:15,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-03 20:14:15,779 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 669 transitions, 10944 flow [2024-06-03 20:14:15,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:15,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:15,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:15,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:14:15,780 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1240676033, now seen corresponding path program 4 times [2024-06-03 20:14:15,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:15,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789963179] [2024-06-03 20:14:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:16,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:16,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789963179] [2024-06-03 20:14:16,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789963179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:16,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:16,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:16,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124123741] [2024-06-03 20:14:16,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:16,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:16,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:16,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:16,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:16,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 669 transitions, 10944 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:16,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:16,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:16,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:18,892 INFO L124 PetriNetUnfolderBase]: 5361/8217 cut-off events. [2024-06-03 20:14:18,892 INFO L125 PetriNetUnfolderBase]: For 1348036/1348044 co-relation queries the response was YES. [2024-06-03 20:14:18,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74986 conditions, 8217 events. 5361/8217 cut-off events. For 1348036/1348044 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 49386 event pairs, 1131 based on Foata normal form. 12/8227 useless extension candidates. Maximal degree in co-relation 74770. Up to 7864 conditions per place. [2024-06-03 20:14:19,030 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 608 selfloop transitions, 108 changer transitions 0/719 dead transitions. [2024-06-03 20:14:19,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 719 transitions, 13416 flow [2024-06-03 20:14:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:14:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:14:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-03 20:14:19,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3800813008130081 [2024-06-03 20:14:19,031 INFO L175 Difference]: Start difference. First operand has 469 places, 669 transitions, 10944 flow. Second operand 12 states and 187 transitions. [2024-06-03 20:14:19,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 719 transitions, 13416 flow [2024-06-03 20:14:24,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 719 transitions, 13228 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:14:24,613 INFO L231 Difference]: Finished difference. Result has 474 places, 684 transitions, 11281 flow [2024-06-03 20:14:24,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10762, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11281, PETRI_PLACES=474, PETRI_TRANSITIONS=684} [2024-06-03 20:14:24,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-03 20:14:24,613 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 684 transitions, 11281 flow [2024-06-03 20:14:24,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:24,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:24,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:24,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:14:24,614 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:24,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:24,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1233444539, now seen corresponding path program 7 times [2024-06-03 20:14:24,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:24,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132951634] [2024-06-03 20:14:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:24,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:25,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132951634] [2024-06-03 20:14:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132951634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:25,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:25,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:25,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093136889] [2024-06-03 20:14:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:25,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:25,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:25,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 684 transitions, 11281 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:25,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:25,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:25,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:27,730 INFO L124 PetriNetUnfolderBase]: 5575/8517 cut-off events. [2024-06-03 20:14:27,730 INFO L125 PetriNetUnfolderBase]: For 1485508/1485510 co-relation queries the response was YES. [2024-06-03 20:14:28,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79908 conditions, 8517 events. 5575/8517 cut-off events. For 1485508/1485510 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 51206 event pairs, 1135 based on Foata normal form. 4/8519 useless extension candidates. Maximal degree in co-relation 79690. Up to 7435 conditions per place. [2024-06-03 20:14:28,115 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 461 selfloop transitions, 301 changer transitions 0/765 dead transitions. [2024-06-03 20:14:28,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 765 transitions, 14671 flow [2024-06-03 20:14:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:14:28,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:14:28,116 INFO L175 Difference]: Start difference. First operand has 474 places, 684 transitions, 11281 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:14:28,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 765 transitions, 14671 flow [2024-06-03 20:14:33,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 765 transitions, 14434 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-03 20:14:33,557 INFO L231 Difference]: Finished difference. Result has 481 places, 735 transitions, 12650 flow [2024-06-03 20:14:33,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11044, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12650, PETRI_PLACES=481, PETRI_TRANSITIONS=735} [2024-06-03 20:14:33,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-03 20:14:33,557 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 735 transitions, 12650 flow [2024-06-03 20:14:33,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:33,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:33,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:33,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:14:33,558 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:33,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1233324383, now seen corresponding path program 5 times [2024-06-03 20:14:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528534051] [2024-06-03 20:14:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:34,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528534051] [2024-06-03 20:14:34,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528534051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:34,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:34,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345642658] [2024-06-03 20:14:34,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:34,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:34,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:34,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 735 transitions, 12650 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:34,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:34,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:34,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:36,881 INFO L124 PetriNetUnfolderBase]: 5563/8497 cut-off events. [2024-06-03 20:14:36,882 INFO L125 PetriNetUnfolderBase]: For 1499547/1499555 co-relation queries the response was YES. [2024-06-03 20:14:36,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80335 conditions, 8497 events. 5563/8497 cut-off events. For 1499547/1499555 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 51099 event pairs, 1133 based on Foata normal form. 12/8507 useless extension candidates. Maximal degree in co-relation 80114. Up to 8152 conditions per place. [2024-06-03 20:14:37,033 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 648 selfloop transitions, 112 changer transitions 0/763 dead transitions. [2024-06-03 20:14:37,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 763 transitions, 14480 flow [2024-06-03 20:14:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:14:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:14:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-03 20:14:37,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37028824833702884 [2024-06-03 20:14:37,034 INFO L175 Difference]: Start difference. First operand has 481 places, 735 transitions, 12650 flow. Second operand 11 states and 167 transitions. [2024-06-03 20:14:37,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 763 transitions, 14480 flow [2024-06-03 20:14:43,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 763 transitions, 14089 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:43,291 INFO L231 Difference]: Finished difference. Result has 489 places, 735 transitions, 12489 flow [2024-06-03 20:14:43,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12259, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12489, PETRI_PLACES=489, PETRI_TRANSITIONS=735} [2024-06-03 20:14:43,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-03 20:14:43,291 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 735 transitions, 12489 flow [2024-06-03 20:14:43,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:43,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:43,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:43,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:14:43,292 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:43,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1240681985, now seen corresponding path program 10 times [2024-06-03 20:14:43,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:43,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651047125] [2024-06-03 20:14:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:43,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:44,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:44,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651047125] [2024-06-03 20:14:44,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651047125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:44,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:44,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:44,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363610021] [2024-06-03 20:14:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:44,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:44,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:44,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:44,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 735 transitions, 12489 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:44,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:44,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:44,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:46,619 INFO L124 PetriNetUnfolderBase]: 5589/8533 cut-off events. [2024-06-03 20:14:46,619 INFO L125 PetriNetUnfolderBase]: For 1527938/1527946 co-relation queries the response was YES. [2024-06-03 20:14:46,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80412 conditions, 8533 events. 5589/8533 cut-off events. For 1527938/1527946 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 51342 event pairs, 1197 based on Foata normal form. 10/8541 useless extension candidates. Maximal degree in co-relation 80190. Up to 8393 conditions per place. [2024-06-03 20:14:46,767 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 704 selfloop transitions, 60 changer transitions 0/767 dead transitions. [2024-06-03 20:14:46,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 767 transitions, 14488 flow [2024-06-03 20:14:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:14:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:14:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 170 transitions. [2024-06-03 20:14:46,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34552845528455284 [2024-06-03 20:14:46,768 INFO L175 Difference]: Start difference. First operand has 489 places, 735 transitions, 12489 flow. Second operand 12 states and 170 transitions. [2024-06-03 20:14:46,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 767 transitions, 14488 flow [2024-06-03 20:14:53,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 767 transitions, 14242 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 20:14:53,393 INFO L231 Difference]: Finished difference. Result has 493 places, 742 transitions, 12562 flow [2024-06-03 20:14:53,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12243, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12562, PETRI_PLACES=493, PETRI_TRANSITIONS=742} [2024-06-03 20:14:53,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-03 20:14:53,393 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 742 transitions, 12562 flow [2024-06-03 20:14:53,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:53,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:53,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:53,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:14:53,394 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:53,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:53,394 INFO L85 PathProgramCache]: Analyzing trace with hash 902698383, now seen corresponding path program 8 times [2024-06-03 20:14:53,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:53,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621138371] [2024-06-03 20:14:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:54,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621138371] [2024-06-03 20:14:54,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621138371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:54,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:54,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257151953] [2024-06-03 20:14:54,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:54,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:54,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:14:54,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 742 transitions, 12562 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:54,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:54,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:14:54,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:57,001 INFO L124 PetriNetUnfolderBase]: 5609/8565 cut-off events. [2024-06-03 20:14:57,001 INFO L125 PetriNetUnfolderBase]: For 1566794/1566796 co-relation queries the response was YES. [2024-06-03 20:14:57,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80637 conditions, 8565 events. 5609/8565 cut-off events. For 1566794/1566796 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 51467 event pairs, 1136 based on Foata normal form. 6/8569 useless extension candidates. Maximal degree in co-relation 80412. Up to 7471 conditions per place. [2024-06-03 20:14:57,134 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 491 selfloop transitions, 283 changer transitions 0/777 dead transitions. [2024-06-03 20:14:57,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 777 transitions, 15228 flow [2024-06-03 20:14:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:14:57,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:14:57,136 INFO L175 Difference]: Start difference. First operand has 493 places, 742 transitions, 12562 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:14:57,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 777 transitions, 15228 flow [2024-06-03 20:15:03,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 777 transitions, 15048 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:03,747 INFO L231 Difference]: Finished difference. Result has 494 places, 748 transitions, 13041 flow [2024-06-03 20:15:03,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12382, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13041, PETRI_PLACES=494, PETRI_TRANSITIONS=748} [2024-06-03 20:15:03,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-03 20:15:03,747 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 748 transitions, 13041 flow [2024-06-03 20:15:03,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:03,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:03,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:03,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:15:03,748 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:03,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 906191463, now seen corresponding path program 9 times [2024-06-03 20:15:03,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:03,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729950190] [2024-06-03 20:15:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:04,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:04,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729950190] [2024-06-03 20:15:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729950190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:04,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:04,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:04,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211487960] [2024-06-03 20:15:04,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:04,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:04,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:04,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:04,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 748 transitions, 13041 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:04,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:04,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:04,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:07,373 INFO L124 PetriNetUnfolderBase]: 5619/8575 cut-off events. [2024-06-03 20:15:07,374 INFO L125 PetriNetUnfolderBase]: For 1580556/1580564 co-relation queries the response was YES. [2024-06-03 20:15:07,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81635 conditions, 8575 events. 5619/8575 cut-off events. For 1580556/1580564 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 51563 event pairs, 1158 based on Foata normal form. 10/8583 useless extension candidates. Maximal degree in co-relation 81409. Up to 8300 conditions per place. [2024-06-03 20:15:07,532 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 674 selfloop transitions, 102 changer transitions 0/779 dead transitions. [2024-06-03 20:15:07,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 779 transitions, 15189 flow [2024-06-03 20:15:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:15:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:15:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-03 20:15:07,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2024-06-03 20:15:07,534 INFO L175 Difference]: Start difference. First operand has 494 places, 748 transitions, 13041 flow. Second operand 11 states and 171 transitions. [2024-06-03 20:15:07,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 779 transitions, 15189 flow [2024-06-03 20:15:14,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 779 transitions, 14476 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:14,833 INFO L231 Difference]: Finished difference. Result has 497 places, 751 transitions, 12600 flow [2024-06-03 20:15:14,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12330, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12600, PETRI_PLACES=497, PETRI_TRANSITIONS=751} [2024-06-03 20:15:14,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-03 20:15:14,833 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 751 transitions, 12600 flow [2024-06-03 20:15:14,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:14,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:14,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:14,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:15:14,834 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:14,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 913543113, now seen corresponding path program 10 times [2024-06-03 20:15:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003371327] [2024-06-03 20:15:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:15,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:15,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003371327] [2024-06-03 20:15:15,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003371327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:15,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:15,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:15,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252445322] [2024-06-03 20:15:15,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:15,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:15,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:15,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 751 transitions, 12600 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:15,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:15,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:15,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:18,128 INFO L124 PetriNetUnfolderBase]: 5613/8567 cut-off events. [2024-06-03 20:15:18,128 INFO L125 PetriNetUnfolderBase]: For 1590547/1590555 co-relation queries the response was YES. [2024-06-03 20:15:18,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80668 conditions, 8567 events. 5613/8567 cut-off events. For 1590547/1590555 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 51568 event pairs, 1166 based on Foata normal form. 10/8575 useless extension candidates. Maximal degree in co-relation 80443. Up to 8348 conditions per place. [2024-06-03 20:15:18,283 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 681 selfloop transitions, 88 changer transitions 0/772 dead transitions. [2024-06-03 20:15:18,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 772 transitions, 14198 flow [2024-06-03 20:15:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-03 20:15:18,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-03 20:15:18,284 INFO L175 Difference]: Start difference. First operand has 497 places, 751 transitions, 12600 flow. Second operand 9 states and 140 transitions. [2024-06-03 20:15:18,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 772 transitions, 14198 flow [2024-06-03 20:15:25,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 772 transitions, 14027 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:15:25,847 INFO L231 Difference]: Finished difference. Result has 500 places, 751 transitions, 12611 flow [2024-06-03 20:15:25,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12429, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12611, PETRI_PLACES=500, PETRI_TRANSITIONS=751} [2024-06-03 20:15:25,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-03 20:15:25,847 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 751 transitions, 12611 flow [2024-06-03 20:15:25,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:25,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:25,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:25,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:15:25,848 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:25,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1244406635, now seen corresponding path program 11 times [2024-06-03 20:15:25,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:25,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834036243] [2024-06-03 20:15:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:25,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:26,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:26,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834036243] [2024-06-03 20:15:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834036243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:26,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:26,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65243331] [2024-06-03 20:15:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:26,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:26,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:26,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:26,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 751 transitions, 12611 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:26,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:26,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:26,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:29,174 INFO L124 PetriNetUnfolderBase]: 5639/8605 cut-off events. [2024-06-03 20:15:29,175 INFO L125 PetriNetUnfolderBase]: For 1633132/1633136 co-relation queries the response was YES. [2024-06-03 20:15:29,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81462 conditions, 8605 events. 5639/8605 cut-off events. For 1633132/1633136 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51740 event pairs, 1211 based on Foata normal form. 6/8609 useless extension candidates. Maximal degree in co-relation 81236. Up to 8296 conditions per place. [2024-06-03 20:15:29,331 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 653 selfloop transitions, 128 changer transitions 0/784 dead transitions. [2024-06-03 20:15:29,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 784 transitions, 14912 flow [2024-06-03 20:15:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:15:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:15:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-03 20:15:29,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3614190687361419 [2024-06-03 20:15:29,332 INFO L175 Difference]: Start difference. First operand has 500 places, 751 transitions, 12611 flow. Second operand 11 states and 163 transitions. [2024-06-03 20:15:29,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 784 transitions, 14912 flow [2024-06-03 20:15:36,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 784 transitions, 14732 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:36,541 INFO L231 Difference]: Finished difference. Result has 505 places, 760 transitions, 12931 flow [2024-06-03 20:15:36,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12431, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12931, PETRI_PLACES=505, PETRI_TRANSITIONS=760} [2024-06-03 20:15:36,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-03 20:15:36,541 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 760 transitions, 12931 flow [2024-06-03 20:15:36,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:36,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:36,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:36,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:15:36,542 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:36,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:36,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1244406449, now seen corresponding path program 11 times [2024-06-03 20:15:36,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:36,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086206109] [2024-06-03 20:15:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:36,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:37,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:37,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086206109] [2024-06-03 20:15:37,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086206109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:37,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:37,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:37,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731141602] [2024-06-03 20:15:37,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:37,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:37,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:37,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:37,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:37,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:37,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 760 transitions, 12931 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:37,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:37,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:37,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:39,744 INFO L124 PetriNetUnfolderBase]: 5627/8591 cut-off events. [2024-06-03 20:15:39,744 INFO L125 PetriNetUnfolderBase]: For 1644456/1644458 co-relation queries the response was YES. [2024-06-03 20:15:39,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81340 conditions, 8591 events. 5627/8591 cut-off events. For 1644456/1644458 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51650 event pairs, 1159 based on Foata normal form. 6/8595 useless extension candidates. Maximal degree in co-relation 81112. Up to 7502 conditions per place. [2024-06-03 20:15:39,899 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 506 selfloop transitions, 278 changer transitions 0/787 dead transitions. [2024-06-03 20:15:39,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 787 transitions, 15525 flow [2024-06-03 20:15:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:15:39,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:15:39,900 INFO L175 Difference]: Start difference. First operand has 505 places, 760 transitions, 12931 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:15:39,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 787 transitions, 15525 flow [2024-06-03 20:15:48,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 787 transitions, 15252 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-03 20:15:48,197 INFO L231 Difference]: Finished difference. Result has 508 places, 761 transitions, 13244 flow [2024-06-03 20:15:48,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12658, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13244, PETRI_PLACES=508, PETRI_TRANSITIONS=761} [2024-06-03 20:15:48,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-03 20:15:48,198 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 761 transitions, 13244 flow [2024-06-03 20:15:48,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:48,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:48,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:48,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:15:48,198 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:48,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash 906180117, now seen corresponding path program 12 times [2024-06-03 20:15:48,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:48,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359823691] [2024-06-03 20:15:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:48,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:49,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:49,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359823691] [2024-06-03 20:15:49,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359823691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:49,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:49,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:49,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220298094] [2024-06-03 20:15:49,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:49,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:49,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:49,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:49,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 761 transitions, 13244 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:49,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:49,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:49,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:51,896 INFO L124 PetriNetUnfolderBase]: 5621/8579 cut-off events. [2024-06-03 20:15:51,896 INFO L125 PetriNetUnfolderBase]: For 1646047/1646055 co-relation queries the response was YES. [2024-06-03 20:15:52,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81674 conditions, 8579 events. 5621/8579 cut-off events. For 1646047/1646055 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51606 event pairs, 1220 based on Foata normal form. 10/8587 useless extension candidates. Maximal degree in co-relation 81446. Up to 8442 conditions per place. [2024-06-03 20:15:52,035 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 721 selfloop transitions, 60 changer transitions 0/784 dead transitions. [2024-06-03 20:15:52,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 784 transitions, 14878 flow [2024-06-03 20:15:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:15:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:15:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-03 20:15:52,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.352549889135255 [2024-06-03 20:15:52,037 INFO L175 Difference]: Start difference. First operand has 508 places, 761 transitions, 13244 flow. Second operand 11 states and 159 transitions. [2024-06-03 20:15:52,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 784 transitions, 14878 flow [2024-06-03 20:15:59,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 784 transitions, 14369 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:59,016 INFO L231 Difference]: Finished difference. Result has 514 places, 761 transitions, 12861 flow [2024-06-03 20:15:59,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12735, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12861, PETRI_PLACES=514, PETRI_TRANSITIONS=761} [2024-06-03 20:15:59,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-03 20:15:59,017 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 761 transitions, 12861 flow [2024-06-03 20:15:59,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:59,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:59,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:59,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:15:59,017 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:59,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:59,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1240687379, now seen corresponding path program 12 times [2024-06-03 20:15:59,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:59,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201210289] [2024-06-03 20:15:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:59,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201210289] [2024-06-03 20:15:59,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201210289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:59,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:59,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:59,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902091142] [2024-06-03 20:15:59,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:59,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:59,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:15:59,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 761 transitions, 12861 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:59,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:59,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:15:59,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:02,338 INFO L124 PetriNetUnfolderBase]: 5732/8740 cut-off events. [2024-06-03 20:16:02,339 INFO L125 PetriNetUnfolderBase]: For 1688830/1688832 co-relation queries the response was YES. [2024-06-03 20:16:02,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82616 conditions, 8740 events. 5732/8740 cut-off events. For 1688830/1688832 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 52676 event pairs, 1231 based on Foata normal form. 6/8744 useless extension candidates. Maximal degree in co-relation 82387. Up to 8503 conditions per place. [2024-06-03 20:16:02,495 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 723 selfloop transitions, 96 changer transitions 0/822 dead transitions. [2024-06-03 20:16:02,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 822 transitions, 15473 flow [2024-06-03 20:16:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-03 20:16:02,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36829268292682926 [2024-06-03 20:16:02,496 INFO L175 Difference]: Start difference. First operand has 514 places, 761 transitions, 12861 flow. Second operand 10 states and 151 transitions. [2024-06-03 20:16:02,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 822 transitions, 15473 flow [2024-06-03 20:16:10,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 822 transitions, 15325 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:16:10,267 INFO L231 Difference]: Finished difference. Result has 518 places, 797 transitions, 13907 flow [2024-06-03 20:16:10,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12741, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13907, PETRI_PLACES=518, PETRI_TRANSITIONS=797} [2024-06-03 20:16:10,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-03 20:16:10,268 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 797 transitions, 13907 flow [2024-06-03 20:16:10,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:10,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:10,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:10,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:16:10,268 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:10,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash -146033225, now seen corresponding path program 6 times [2024-06-03 20:16:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:10,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949199048] [2024-06-03 20:16:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:11,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:11,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949199048] [2024-06-03 20:16:11,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949199048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:11,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:11,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:16:11,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65213376] [2024-06-03 20:16:11,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:11,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:16:11,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:11,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:16:11,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:16:11,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:16:11,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 797 transitions, 13907 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:11,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:11,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:16:11,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:13,689 INFO L124 PetriNetUnfolderBase]: 5720/8720 cut-off events. [2024-06-03 20:16:13,689 INFO L125 PetriNetUnfolderBase]: For 1685316/1685324 co-relation queries the response was YES. [2024-06-03 20:16:13,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82689 conditions, 8720 events. 5720/8720 cut-off events. For 1685316/1685324 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 52494 event pairs, 1158 based on Foata normal form. 12/8730 useless extension candidates. Maximal degree in co-relation 82455. Up to 8342 conditions per place. [2024-06-03 20:16:13,864 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 697 selfloop transitions, 125 changer transitions 0/825 dead transitions. [2024-06-03 20:16:13,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 825 transitions, 15881 flow [2024-06-03 20:16:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-03 20:16:13,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:16:13,865 INFO L175 Difference]: Start difference. First operand has 518 places, 797 transitions, 13907 flow. Second operand 10 states and 160 transitions. [2024-06-03 20:16:13,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 825 transitions, 15881 flow [2024-06-03 20:16:21,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 825 transitions, 15700 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:21,952 INFO L231 Difference]: Finished difference. Result has 524 places, 797 transitions, 13982 flow [2024-06-03 20:16:21,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13726, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13982, PETRI_PLACES=524, PETRI_TRANSITIONS=797} [2024-06-03 20:16:21,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-03 20:16:21,953 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 797 transitions, 13982 flow [2024-06-03 20:16:21,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:21,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:21,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:21,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:16:21,953 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:21,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash 902707311, now seen corresponding path program 1 times [2024-06-03 20:16:21,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:21,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919851725] [2024-06-03 20:16:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:21,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:23,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:23,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919851725] [2024-06-03 20:16:23,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919851725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:23,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:23,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:23,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580747074] [2024-06-03 20:16:23,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:23,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:23,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:23,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:16:23,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 797 transitions, 13982 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:23,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:23,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:16:23,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:25,854 INFO L124 PetriNetUnfolderBase]: 5764/8790 cut-off events. [2024-06-03 20:16:25,854 INFO L125 PetriNetUnfolderBase]: For 1774340/1774340 co-relation queries the response was YES. [2024-06-03 20:16:25,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83402 conditions, 8790 events. 5764/8790 cut-off events. For 1774340/1774340 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 52978 event pairs, 1185 based on Foata normal form. 12/8800 useless extension candidates. Maximal degree in co-relation 83167. Up to 8411 conditions per place. [2024-06-03 20:16:26,008 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 708 selfloop transitions, 115 changer transitions 0/826 dead transitions. [2024-06-03 20:16:26,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 826 transitions, 15791 flow [2024-06-03 20:16:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:16:26,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-03 20:16:26,009 INFO L175 Difference]: Start difference. First operand has 524 places, 797 transitions, 13982 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:16:26,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 826 transitions, 15791 flow [2024-06-03 20:16:35,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 826 transitions, 15541 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:16:35,149 INFO L231 Difference]: Finished difference. Result has 524 places, 799 transitions, 14025 flow [2024-06-03 20:16:35,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13732, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14025, PETRI_PLACES=524, PETRI_TRANSITIONS=799} [2024-06-03 20:16:35,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-03 20:16:35,149 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 799 transitions, 14025 flow [2024-06-03 20:16:35,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:35,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:35,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:35,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:16:35,150 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:35,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1244498705, now seen corresponding path program 4 times [2024-06-03 20:16:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:35,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814399915] [2024-06-03 20:16:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:36,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:36,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814399915] [2024-06-03 20:16:36,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814399915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:36,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:36,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:16:36,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726584000] [2024-06-03 20:16:36,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:36,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:16:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:36,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:16:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:16:36,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:16:36,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 799 transitions, 14025 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:36,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:36,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:16:36,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:38,562 INFO L124 PetriNetUnfolderBase]: 5882/8972 cut-off events. [2024-06-03 20:16:38,563 INFO L125 PetriNetUnfolderBase]: For 1833686/1833686 co-relation queries the response was YES. [2024-06-03 20:16:38,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85803 conditions, 8972 events. 5882/8972 cut-off events. For 1833686/1833686 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 54229 event pairs, 1197 based on Foata normal form. 8/8978 useless extension candidates. Maximal degree in co-relation 85567. Up to 8451 conditions per place. [2024-06-03 20:16:38,726 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 721 selfloop transitions, 113 changer transitions 0/837 dead transitions. [2024-06-03 20:16:38,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 837 transitions, 16194 flow [2024-06-03 20:16:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:16:38,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:16:38,727 INFO L175 Difference]: Start difference. First operand has 524 places, 799 transitions, 14025 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:16:38,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 837 transitions, 16194 flow [2024-06-03 20:16:47,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 837 transitions, 15980 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:16:47,569 INFO L231 Difference]: Finished difference. Result has 529 places, 804 transitions, 14149 flow [2024-06-03 20:16:47,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13811, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14149, PETRI_PLACES=529, PETRI_TRANSITIONS=804} [2024-06-03 20:16:47,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-03 20:16:47,570 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 804 transitions, 14149 flow [2024-06-03 20:16:47,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:47,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:47,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:47,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:16:47,570 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:47,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1233060821, now seen corresponding path program 2 times [2024-06-03 20:16:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:47,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049162004] [2024-06-03 20:16:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:48,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:48,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049162004] [2024-06-03 20:16:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049162004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:48,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:48,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:48,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972448221] [2024-06-03 20:16:48,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:48,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:48,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:48,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:48,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:16:48,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 804 transitions, 14149 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:48,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:48,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:16:48,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:51,261 INFO L124 PetriNetUnfolderBase]: 5877/8965 cut-off events. [2024-06-03 20:16:51,261 INFO L125 PetriNetUnfolderBase]: For 1800087/1800087 co-relation queries the response was YES. [2024-06-03 20:16:51,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85857 conditions, 8965 events. 5877/8965 cut-off events. For 1800087/1800087 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 54206 event pairs, 1179 based on Foata normal form. 2/8965 useless extension candidates. Maximal degree in co-relation 85619. Up to 8634 conditions per place. [2024-06-03 20:16:51,429 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 703 selfloop transitions, 123 changer transitions 0/829 dead transitions. [2024-06-03 20:16:51,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 829 transitions, 15931 flow [2024-06-03 20:16:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:16:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:16:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 20:16:51,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-03 20:16:51,430 INFO L175 Difference]: Start difference. First operand has 529 places, 804 transitions, 14149 flow. Second operand 9 states and 143 transitions. [2024-06-03 20:16:51,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 829 transitions, 15931 flow [2024-06-03 20:16:59,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 829 transitions, 15813 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:16:59,895 INFO L231 Difference]: Finished difference. Result has 533 places, 806 transitions, 14343 flow [2024-06-03 20:16:59,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14033, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14343, PETRI_PLACES=533, PETRI_TRANSITIONS=806} [2024-06-03 20:16:59,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-03 20:16:59,896 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 806 transitions, 14343 flow [2024-06-03 20:16:59,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:59,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:59,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:59,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:16:59,896 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:59,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:59,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1233047801, now seen corresponding path program 3 times [2024-06-03 20:16:59,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:59,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131366073] [2024-06-03 20:16:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:59,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:01,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:01,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131366073] [2024-06-03 20:17:01,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131366073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:01,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:01,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:01,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99344258] [2024-06-03 20:17:01,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:01,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:01,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:01,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:01,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:01,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:01,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 806 transitions, 14343 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:01,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:01,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:01,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:03,808 INFO L124 PetriNetUnfolderBase]: 5885/8977 cut-off events. [2024-06-03 20:17:03,808 INFO L125 PetriNetUnfolderBase]: For 1835429/1835429 co-relation queries the response was YES. [2024-06-03 20:17:03,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86507 conditions, 8977 events. 5885/8977 cut-off events. For 1835429/1835429 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 54254 event pairs, 1193 based on Foata normal form. 2/8977 useless extension candidates. Maximal degree in co-relation 86267. Up to 8518 conditions per place. [2024-06-03 20:17:03,971 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 705 selfloop transitions, 129 changer transitions 0/837 dead transitions. [2024-06-03 20:17:03,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 837 transitions, 16187 flow [2024-06-03 20:17:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:17:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:17:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:17:03,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:17:03,972 INFO L175 Difference]: Start difference. First operand has 533 places, 806 transitions, 14343 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:17:03,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 837 transitions, 16187 flow [2024-06-03 20:17:14,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 837 transitions, 15997 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:14,027 INFO L231 Difference]: Finished difference. Result has 539 places, 810 transitions, 14510 flow [2024-06-03 20:17:14,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14153, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14510, PETRI_PLACES=539, PETRI_TRANSITIONS=810} [2024-06-03 20:17:14,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-03 20:17:14,027 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 810 transitions, 14510 flow [2024-06-03 20:17:14,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:14,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:14,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:17:14,028 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:14,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -716815453, now seen corresponding path program 13 times [2024-06-03 20:17:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:14,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631334795] [2024-06-03 20:17:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:14,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:14,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631334795] [2024-06-03 20:17:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631334795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:14,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240576112] [2024-06-03 20:17:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:14,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:14,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:14,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:14,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 810 transitions, 14510 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:14,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:14,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:14,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:17,444 INFO L124 PetriNetUnfolderBase]: 5911/9015 cut-off events. [2024-06-03 20:17:17,445 INFO L125 PetriNetUnfolderBase]: For 1881951/1881953 co-relation queries the response was YES. [2024-06-03 20:17:17,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87655 conditions, 9015 events. 5911/9015 cut-off events. For 1881951/1881953 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 54609 event pairs, 1310 based on Foata normal form. 4/9017 useless extension candidates. Maximal degree in co-relation 87413. Up to 8874 conditions per place. [2024-06-03 20:17:17,619 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 797 selfloop transitions, 39 changer transitions 0/839 dead transitions. [2024-06-03 20:17:17,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 839 transitions, 16668 flow [2024-06-03 20:17:17,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:17:17,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:17:17,620 INFO L175 Difference]: Start difference. First operand has 539 places, 810 transitions, 14510 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:17:17,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 839 transitions, 16668 flow [2024-06-03 20:17:27,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 839 transitions, 16495 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:27,241 INFO L231 Difference]: Finished difference. Result has 542 places, 816 transitions, 14595 flow [2024-06-03 20:17:27,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14337, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14595, PETRI_PLACES=542, PETRI_TRANSITIONS=816} [2024-06-03 20:17:27,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 500 predicate places. [2024-06-03 20:17:27,242 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 816 transitions, 14595 flow [2024-06-03 20:17:27,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:27,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:27,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:17:27,242 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:27,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1204326153, now seen corresponding path program 7 times [2024-06-03 20:17:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320581180] [2024-06-03 20:17:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320581180] [2024-06-03 20:17:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320581180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:28,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:28,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:28,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916713811] [2024-06-03 20:17:28,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:28,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:28,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:28,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:28,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:28,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 816 transitions, 14595 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:28,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:28,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:28,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:31,268 INFO L124 PetriNetUnfolderBase]: 5975/9104 cut-off events. [2024-06-03 20:17:31,268 INFO L125 PetriNetUnfolderBase]: For 1969478/1969480 co-relation queries the response was YES. [2024-06-03 20:17:31,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89346 conditions, 9104 events. 5975/9104 cut-off events. For 1969478/1969480 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 55184 event pairs, 1325 based on Foata normal form. 6/9108 useless extension candidates. Maximal degree in co-relation 89102. Up to 8838 conditions per place. [2024-06-03 20:17:31,441 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 791 selfloop transitions, 57 changer transitions 0/851 dead transitions. [2024-06-03 20:17:31,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 851 transitions, 17111 flow [2024-06-03 20:17:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:17:31,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:17:31,442 INFO L175 Difference]: Start difference. First operand has 542 places, 816 transitions, 14595 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:17:31,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 851 transitions, 17111 flow [2024-06-03 20:17:39,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 851 transitions, 16973 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:39,891 INFO L231 Difference]: Finished difference. Result has 547 places, 825 transitions, 14804 flow [2024-06-03 20:17:39,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14457, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14804, PETRI_PLACES=547, PETRI_TRANSITIONS=825} [2024-06-03 20:17:39,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 505 predicate places. [2024-06-03 20:17:39,892 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 825 transitions, 14804 flow [2024-06-03 20:17:39,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:39,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:39,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:39,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:17:39,892 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:39,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash 320373887, now seen corresponding path program 14 times [2024-06-03 20:17:39,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:39,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763582923] [2024-06-03 20:17:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:40,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:40,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763582923] [2024-06-03 20:17:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763582923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:40,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:40,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612193783] [2024-06-03 20:17:40,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:40,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:40,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:40,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:40,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:40,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 825 transitions, 14804 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:40,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:40,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:40,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:44,358 INFO L124 PetriNetUnfolderBase]: 6017/9159 cut-off events. [2024-06-03 20:17:44,358 INFO L125 PetriNetUnfolderBase]: For 2012732/2012736 co-relation queries the response was YES. [2024-06-03 20:17:44,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90852 conditions, 9159 events. 6017/9159 cut-off events. For 2012732/2012736 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 55489 event pairs, 1277 based on Foata normal form. 4/9161 useless extension candidates. Maximal degree in co-relation 90605. Up to 8774 conditions per place. [2024-06-03 20:17:44,541 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 754 selfloop transitions, 106 changer transitions 0/863 dead transitions. [2024-06-03 20:17:44,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 863 transitions, 17614 flow [2024-06-03 20:17:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:17:44,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-03 20:17:44,542 INFO L175 Difference]: Start difference. First operand has 547 places, 825 transitions, 14804 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:17:44,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 863 transitions, 17614 flow [2024-06-03 20:17:52,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 863 transitions, 17478 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-03 20:17:52,408 INFO L231 Difference]: Finished difference. Result has 552 places, 834 transitions, 15126 flow [2024-06-03 20:17:52,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14668, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15126, PETRI_PLACES=552, PETRI_TRANSITIONS=834} [2024-06-03 20:17:52,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 510 predicate places. [2024-06-03 20:17:52,409 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 834 transitions, 15126 flow [2024-06-03 20:17:52,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:52,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:52,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:52,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:17:52,409 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:52,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:52,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2143163987, now seen corresponding path program 15 times [2024-06-03 20:17:52,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:52,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894365733] [2024-06-03 20:17:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:52,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:53,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894365733] [2024-06-03 20:17:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894365733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:53,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:53,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866969536] [2024-06-03 20:17:53,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:53,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:53,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:53,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:53,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:53,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:17:53,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 834 transitions, 15126 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:53,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:53,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:17:53,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:56,697 INFO L124 PetriNetUnfolderBase]: 6027/9176 cut-off events. [2024-06-03 20:17:56,697 INFO L125 PetriNetUnfolderBase]: For 2044200/2044202 co-relation queries the response was YES. [2024-06-03 20:17:56,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91301 conditions, 9176 events. 6027/9176 cut-off events. For 2044200/2044202 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 55596 event pairs, 1342 based on Foata normal form. 4/9178 useless extension candidates. Maximal degree in co-relation 91052. Up to 9031 conditions per place. [2024-06-03 20:17:56,892 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 814 selfloop transitions, 40 changer transitions 0/857 dead transitions. [2024-06-03 20:17:56,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 857 transitions, 17216 flow [2024-06-03 20:17:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:17:56,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:17:56,893 INFO L175 Difference]: Start difference. First operand has 552 places, 834 transitions, 15126 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:17:56,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 857 transitions, 17216 flow [2024-06-03 20:18:06,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 857 transitions, 16856 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:06,489 INFO L231 Difference]: Finished difference. Result has 554 places, 837 transitions, 14918 flow [2024-06-03 20:18:06,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14775, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14918, PETRI_PLACES=554, PETRI_TRANSITIONS=837} [2024-06-03 20:18:06,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 512 predicate places. [2024-06-03 20:18:06,490 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 837 transitions, 14918 flow [2024-06-03 20:18:06,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:06,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:06,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:06,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:18:06,490 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:06,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:06,490 INFO L85 PathProgramCache]: Analyzing trace with hash -947916008, now seen corresponding path program 1 times [2024-06-03 20:18:06,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:06,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048068354] [2024-06-03 20:18:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:06,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:07,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:07,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048068354] [2024-06-03 20:18:07,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048068354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:07,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:07,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385187045] [2024-06-03 20:18:07,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:07,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:07,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:07,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:07,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:07,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 837 transitions, 14918 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:07,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:07,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:07,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:10,990 INFO L124 PetriNetUnfolderBase]: 6020/9165 cut-off events. [2024-06-03 20:18:10,990 INFO L125 PetriNetUnfolderBase]: For 2054022/2054022 co-relation queries the response was YES. [2024-06-03 20:18:11,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90669 conditions, 9165 events. 6020/9165 cut-off events. For 2054022/2054022 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 55525 event pairs, 1335 based on Foata normal form. 1/9164 useless extension candidates. Maximal degree in co-relation 90421. Up to 9040 conditions per place. [2024-06-03 20:18:11,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 813 selfloop transitions, 47 changer transitions 0/863 dead transitions. [2024-06-03 20:18:11,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 863 transitions, 17048 flow [2024-06-03 20:18:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:11,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-03 20:18:11,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-03 20:18:11,165 INFO L175 Difference]: Start difference. First operand has 554 places, 837 transitions, 14918 flow. Second operand 9 states and 135 transitions. [2024-06-03 20:18:11,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 863 transitions, 17048 flow [2024-06-03 20:18:19,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 863 transitions, 16913 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:19,610 INFO L231 Difference]: Finished difference. Result has 559 places, 840 transitions, 14992 flow [2024-06-03 20:18:19,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14783, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14992, PETRI_PLACES=559, PETRI_TRANSITIONS=840} [2024-06-03 20:18:19,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 517 predicate places. [2024-06-03 20:18:19,611 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 840 transitions, 14992 flow [2024-06-03 20:18:19,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:19,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:19,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:19,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:18:19,611 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:19,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash -992398632, now seen corresponding path program 2 times [2024-06-03 20:18:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:19,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771104342] [2024-06-03 20:18:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:20,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771104342] [2024-06-03 20:18:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771104342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:20,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:20,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:20,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656201560] [2024-06-03 20:18:20,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:20,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:20,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:20,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 840 transitions, 14992 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:20,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:20,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:20,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:24,096 INFO L124 PetriNetUnfolderBase]: 6025/9173 cut-off events. [2024-06-03 20:18:24,097 INFO L125 PetriNetUnfolderBase]: For 2084281/2084283 co-relation queries the response was YES. [2024-06-03 20:18:24,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91068 conditions, 9173 events. 6025/9173 cut-off events. For 2084281/2084283 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 55597 event pairs, 1351 based on Foata normal form. 3/9174 useless extension candidates. Maximal degree in co-relation 90818. Up to 9094 conditions per place. [2024-06-03 20:18:24,276 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 821 selfloop transitions, 32 changer transitions 0/856 dead transitions. [2024-06-03 20:18:24,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 856 transitions, 16821 flow [2024-06-03 20:18:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 20:18:24,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-03 20:18:24,277 INFO L175 Difference]: Start difference. First operand has 559 places, 840 transitions, 14992 flow. Second operand 7 states and 108 transitions. [2024-06-03 20:18:24,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 856 transitions, 16821 flow [2024-06-03 20:18:32,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 856 transitions, 16673 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-03 20:18:32,810 INFO L231 Difference]: Finished difference. Result has 556 places, 843 transitions, 15011 flow [2024-06-03 20:18:32,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14861, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15011, PETRI_PLACES=556, PETRI_TRANSITIONS=843} [2024-06-03 20:18:32,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 514 predicate places. [2024-06-03 20:18:32,811 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 843 transitions, 15011 flow [2024-06-03 20:18:32,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:32,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:32,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:32,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:18:32,811 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:32,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:32,812 INFO L85 PathProgramCache]: Analyzing trace with hash -849647403, now seen corresponding path program 8 times [2024-06-03 20:18:32,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:32,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542872497] [2024-06-03 20:18:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:32,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:33,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542872497] [2024-06-03 20:18:33,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542872497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:33,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:33,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:33,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337378250] [2024-06-03 20:18:33,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:33,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:33,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:33,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 843 transitions, 15011 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:33,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:33,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:33,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:36,828 INFO L124 PetriNetUnfolderBase]: 6050/9208 cut-off events. [2024-06-03 20:18:36,828 INFO L125 PetriNetUnfolderBase]: For 2109180/2109182 co-relation queries the response was YES. [2024-06-03 20:18:36,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91232 conditions, 9208 events. 6050/9208 cut-off events. For 2109180/2109182 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 55850 event pairs, 1329 based on Foata normal form. 6/9212 useless extension candidates. Maximal degree in co-relation 90984. Up to 9055 conditions per place. [2024-06-03 20:18:36,996 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 820 selfloop transitions, 46 changer transitions 0/869 dead transitions. [2024-06-03 20:18:36,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 869 transitions, 16889 flow [2024-06-03 20:18:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:18:36,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 20:18:36,997 INFO L175 Difference]: Start difference. First operand has 556 places, 843 transitions, 15011 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:18:36,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 869 transitions, 16889 flow [2024-06-03 20:18:45,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 869 transitions, 16781 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:45,842 INFO L231 Difference]: Finished difference. Result has 559 places, 850 transitions, 15101 flow [2024-06-03 20:18:45,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14905, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15101, PETRI_PLACES=559, PETRI_TRANSITIONS=850} [2024-06-03 20:18:45,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 517 predicate places. [2024-06-03 20:18:45,843 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 850 transitions, 15101 flow [2024-06-03 20:18:45,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:45,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:45,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:45,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:18:45,844 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:45,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:45,844 INFO L85 PathProgramCache]: Analyzing trace with hash 320672789, now seen corresponding path program 9 times [2024-06-03 20:18:45,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:45,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002294544] [2024-06-03 20:18:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:45,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:46,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:46,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002294544] [2024-06-03 20:18:46,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002294544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:46,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:46,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:46,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178534222] [2024-06-03 20:18:46,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:46,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:46,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:46,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:46,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:46,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 850 transitions, 15101 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:46,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:46,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:46,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:50,076 INFO L124 PetriNetUnfolderBase]: 6070/9232 cut-off events. [2024-06-03 20:18:50,076 INFO L125 PetriNetUnfolderBase]: For 2110251/2110259 co-relation queries the response was YES. [2024-06-03 20:18:50,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92362 conditions, 9232 events. 6070/9232 cut-off events. For 2110251/2110259 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 55999 event pairs, 1148 based on Foata normal form. 10/9240 useless extension candidates. Maximal degree in co-relation 92113. Up to 8456 conditions per place. [2024-06-03 20:18:50,261 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 696 selfloop transitions, 184 changer transitions 0/883 dead transitions. [2024-06-03 20:18:50,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 883 transitions, 17569 flow [2024-06-03 20:18:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:18:50,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:18:50,262 INFO L175 Difference]: Start difference. First operand has 559 places, 850 transitions, 15101 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:18:50,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 883 transitions, 17569 flow [2024-06-03 20:18:59,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 883 transitions, 17453 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:59,029 INFO L231 Difference]: Finished difference. Result has 563 places, 853 transitions, 15433 flow [2024-06-03 20:18:59,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14985, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15433, PETRI_PLACES=563, PETRI_TRANSITIONS=853} [2024-06-03 20:18:59,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 521 predicate places. [2024-06-03 20:18:59,029 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 853 transitions, 15433 flow [2024-06-03 20:18:59,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:59,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:59,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:18:59,029 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:59,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:59,030 INFO L85 PathProgramCache]: Analyzing trace with hash 320672417, now seen corresponding path program 16 times [2024-06-03 20:18:59,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:59,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451043760] [2024-06-03 20:18:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:59,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:59,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451043760] [2024-06-03 20:18:59,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451043760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:59,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:59,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:59,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934689309] [2024-06-03 20:18:59,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:59,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:59,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:59,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:59,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:18:59,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 853 transitions, 15433 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:59,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:18:59,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:03,111 INFO L124 PetriNetUnfolderBase]: 6096/9269 cut-off events. [2024-06-03 20:19:03,111 INFO L125 PetriNetUnfolderBase]: For 2146018/2146022 co-relation queries the response was YES. [2024-06-03 20:19:03,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93708 conditions, 9269 events. 6096/9269 cut-off events. For 2146018/2146022 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 56236 event pairs, 1286 based on Foata normal form. 4/9271 useless extension candidates. Maximal degree in co-relation 93458. Up to 8869 conditions per place. [2024-06-03 20:19:03,281 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 768 selfloop transitions, 114 changer transitions 0/885 dead transitions. [2024-06-03 20:19:03,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 885 transitions, 18211 flow [2024-06-03 20:19:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:19:03,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:19:03,282 INFO L175 Difference]: Start difference. First operand has 563 places, 853 transitions, 15433 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:19:03,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 885 transitions, 18211 flow [2024-06-03 20:19:12,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 885 transitions, 17781 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:12,598 INFO L231 Difference]: Finished difference. Result has 564 places, 859 transitions, 15383 flow [2024-06-03 20:19:12,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15009, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15383, PETRI_PLACES=564, PETRI_TRANSITIONS=859} [2024-06-03 20:19:12,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 522 predicate places. [2024-06-03 20:19:12,598 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 859 transitions, 15383 flow [2024-06-03 20:19:12,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:12,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:12,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:12,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:19:12,599 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:12,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash 776110463, now seen corresponding path program 10 times [2024-06-03 20:19:12,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:12,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242141288] [2024-06-03 20:19:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:12,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:13,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:13,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242141288] [2024-06-03 20:19:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242141288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:13,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:13,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:13,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390830949] [2024-06-03 20:19:13,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:13,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:13,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:13,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:13,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:13,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:19:13,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 859 transitions, 15383 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:13,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:13,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:19:13,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:16,590 INFO L124 PetriNetUnfolderBase]: 6140/9333 cut-off events. [2024-06-03 20:19:16,590 INFO L125 PetriNetUnfolderBase]: For 2190031/2190033 co-relation queries the response was YES. [2024-06-03 20:19:16,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93976 conditions, 9333 events. 6140/9333 cut-off events. For 2190031/2190033 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 56710 event pairs, 1360 based on Foata normal form. 6/9337 useless extension candidates. Maximal degree in co-relation 93727. Up to 9135 conditions per place. [2024-06-03 20:19:16,777 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 830 selfloop transitions, 54 changer transitions 0/887 dead transitions. [2024-06-03 20:19:16,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 887 transitions, 17625 flow [2024-06-03 20:19:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 20:19:16,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 20:19:16,778 INFO L175 Difference]: Start difference. First operand has 564 places, 859 transitions, 15383 flow. Second operand 8 states and 130 transitions. [2024-06-03 20:19:16,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 887 transitions, 17625 flow [2024-06-03 20:19:26,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 887 transitions, 17379 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:26,472 INFO L231 Difference]: Finished difference. Result has 568 places, 865 transitions, 15380 flow [2024-06-03 20:19:26,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15137, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15380, PETRI_PLACES=568, PETRI_TRANSITIONS=865} [2024-06-03 20:19:26,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 526 predicate places. [2024-06-03 20:19:26,472 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 865 transitions, 15380 flow [2024-06-03 20:19:26,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:26,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:26,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:26,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:19:26,473 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:26,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash 315011507, now seen corresponding path program 17 times [2024-06-03 20:19:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925649046] [2024-06-03 20:19:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:27,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:27,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925649046] [2024-06-03 20:19:27,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925649046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:27,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:27,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:27,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789600547] [2024-06-03 20:19:27,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:27,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:27,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:27,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:27,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:19:27,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 865 transitions, 15380 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:27,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:27,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:19:27,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:30,559 INFO L124 PetriNetUnfolderBase]: 6134/9320 cut-off events. [2024-06-03 20:19:30,559 INFO L125 PetriNetUnfolderBase]: For 2182620/2182628 co-relation queries the response was YES. [2024-06-03 20:19:30,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93609 conditions, 9320 events. 6134/9320 cut-off events. For 2182620/2182628 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 56567 event pairs, 1267 based on Foata normal form. 8/9326 useless extension candidates. Maximal degree in co-relation 93359. Up to 8925 conditions per place. [2024-06-03 20:19:30,721 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 769 selfloop transitions, 124 changer transitions 0/896 dead transitions. [2024-06-03 20:19:30,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 896 transitions, 17798 flow [2024-06-03 20:19:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:19:30,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-03 20:19:30,722 INFO L175 Difference]: Start difference. First operand has 568 places, 865 transitions, 15380 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:19:30,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 896 transitions, 17798 flow [2024-06-03 20:19:39,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 896 transitions, 17662 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:39,903 INFO L231 Difference]: Finished difference. Result has 572 places, 865 transitions, 15498 flow [2024-06-03 20:19:39,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15244, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15498, PETRI_PLACES=572, PETRI_TRANSITIONS=865} [2024-06-03 20:19:39,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 530 predicate places. [2024-06-03 20:19:39,904 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 865 transitions, 15498 flow [2024-06-03 20:19:39,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:39,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:39,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:39,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:19:39,904 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:39,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash 776110091, now seen corresponding path program 18 times [2024-06-03 20:19:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:39,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735903269] [2024-06-03 20:19:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:40,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:40,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735903269] [2024-06-03 20:19:40,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735903269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:40,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:40,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:40,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010177268] [2024-06-03 20:19:40,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:40,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:40,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:19:40,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 865 transitions, 15498 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:40,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:40,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:19:40,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:44,008 INFO L124 PetriNetUnfolderBase]: 6144/9339 cut-off events. [2024-06-03 20:19:44,008 INFO L125 PetriNetUnfolderBase]: For 2215968/2215970 co-relation queries the response was YES. [2024-06-03 20:19:44,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94202 conditions, 9339 events. 6144/9339 cut-off events. For 2215968/2215970 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 56663 event pairs, 1369 based on Foata normal form. 4/9341 useless extension candidates. Maximal degree in co-relation 93950. Up to 9272 conditions per place. [2024-06-03 20:19:44,188 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 854 selfloop transitions, 26 changer transitions 0/883 dead transitions. [2024-06-03 20:19:44,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 883 transitions, 17372 flow [2024-06-03 20:19:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 20:19:44,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-03 20:19:44,189 INFO L175 Difference]: Start difference. First operand has 572 places, 865 transitions, 15498 flow. Second operand 8 states and 118 transitions. [2024-06-03 20:19:44,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 883 transitions, 17372 flow [2024-06-03 20:19:53,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 883 transitions, 16882 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:53,364 INFO L231 Difference]: Finished difference. Result has 573 places, 868 transitions, 15138 flow [2024-06-03 20:19:53,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15017, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15138, PETRI_PLACES=573, PETRI_TRANSITIONS=868} [2024-06-03 20:19:53,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 531 predicate places. [2024-06-03 20:19:53,365 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 868 transitions, 15138 flow [2024-06-03 20:19:53,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:53,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:53,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:53,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:19:53,366 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:53,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1495069783, now seen corresponding path program 19 times [2024-06-03 20:19:53,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:53,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849067894] [2024-06-03 20:19:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:53,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:54,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849067894] [2024-06-03 20:19:54,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849067894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39060949] [2024-06-03 20:19:54,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:54,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:54,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:54,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-03 20:19:54,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 868 transitions, 15138 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:54,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:54,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-03 20:19:54,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand