./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe031_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:34:42,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:34:42,793 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:34:42,800 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:34:42,800 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:34:42,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:34:42,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:34:42,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:34:42,828 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:34:42,831 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:34:42,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:34:42,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:34:42,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:34:42,833 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:34:42,833 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:34:42,834 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:34:42,834 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:34:42,834 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:34:42,834 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:34:42,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:34:42,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:34:42,835 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:34:42,835 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:34:42,835 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:34:42,836 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:34:42,836 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:34:42,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:34:42,836 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:34:42,837 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:34:42,837 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:34:42,838 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:34:42,838 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:34:42,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:34:42,838 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:34:42,838 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:34:42,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:34:42,839 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:34:42,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:34:42,839 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:34:42,839 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:34:42,840 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:34:42,840 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:34:42,840 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:34:42,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:34:43,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:34:43,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:34:43,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:34:43,066 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:34:43,066 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:34:43,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 13:34:43,250 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:34:43,251 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:34:43,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-14 13:34:44,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:34:44,551 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:34:44,557 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-14 13:34:44,573 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4e59449/e904f020632044b88d9c02600781f757/FLAG24d845b06 [2024-06-14 13:34:44,826 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4e59449/e904f020632044b88d9c02600781f757 [2024-06-14 13:34:44,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:34:44,830 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:34:44,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:34:44,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:34:44,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:34:44,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:34:43" (1/2) ... [2024-06-14 13:34:44,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a4476b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:44, skipping insertion in model container [2024-06-14 13:34:44,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:34:43" (1/2) ... [2024-06-14 13:34:44,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9977f1f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:34:44, skipping insertion in model container [2024-06-14 13:34:44,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:34:44" (2/2) ... [2024-06-14 13:34:44,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a4476b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:44, skipping insertion in model container [2024-06-14 13:34:44,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:34:44" (2/2) ... [2024-06-14 13:34:44,838 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:34:44,906 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:34:44,907 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:34:44,907 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:34:44,907 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:34:44,907 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:34:44,907 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-14 13:34:44,942 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:34:45,247 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:34:45,259 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:34:45,402 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:34:45,435 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:34:45,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45 WrapperNode [2024-06-14 13:34:45,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:34:45,437 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:34:45,437 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:34:45,437 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:34:45,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,487 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-14 13:34:45,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:34:45,488 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:34:45,488 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:34:45,488 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:34:45,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,500 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,531 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]. [2024-06-14 13:34:45,531 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,555 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,556 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,558 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,559 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,562 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:34:45,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:34:45,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:34:45,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:34:45,575 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (1/1) ... [2024-06-14 13:34:45,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:34:45,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:34:45,612 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) [2024-06-14 13:34:45,629 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 [2024-06-14 13:34:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:34:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:34:45,644 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:34:45,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:34:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:34:45,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:34:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:34:45,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:34:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:34:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:34:45,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:34:45,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:34:45,646 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:34:45,781 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:34:45,783 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:34:46,062 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:34:46,062 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:34:46,217 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:34:46,218 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:34:46,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:34:46 BoogieIcfgContainer [2024-06-14 13:34:46,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:34:46,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:34:46,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:34:46,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:34:46,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:34:43" (1/4) ... [2024-06-14 13:34:46,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5814fd4d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:34:46, skipping insertion in model container [2024-06-14 13:34:46,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:34:44" (2/4) ... [2024-06-14 13:34:46,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5814fd4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:34:46, skipping insertion in model container [2024-06-14 13:34:46,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:34:45" (3/4) ... [2024-06-14 13:34:46,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5814fd4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:34:46, skipping insertion in model container [2024-06-14 13:34:46,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:34:46" (4/4) ... [2024-06-14 13:34:46,224 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.opt_pso.opt_rmo.opt.i [2024-06-14 13:34:46,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:34:46,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:34:46,237 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:34:46,268 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:34:46,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:34:46,316 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 13:34:46,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:34:46,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:34:46,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 13:34:46,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 13:34:46,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:34:46,340 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;@1036a7b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:34:46,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:34:46,346 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:34:46,346 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:34:46,346 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:34:46,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:46,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:34:46,348 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)] === [2024-06-14 13:34:46,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:46,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1617218559, now seen corresponding path program 1 times [2024-06-14 13:34:46,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:46,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789641680] [2024-06-14 13:34:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:47,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:47,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789641680] [2024-06-14 13:34:47,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789641680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:47,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:47,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:34:47,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884372918] [2024-06-14 13:34:47,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:47,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:34:47,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:34:47,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:34:47,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 13:34:47,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:47,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:47,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 13:34:47,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:47,820 INFO L124 PetriNetUnfolderBase]: 1059/1630 cut-off events. [2024-06-14 13:34:47,820 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-06-14 13:34:47,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 1630 events. 1059/1630 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7965 event pairs, 698 based on Foata normal form. 1/1594 useless extension candidates. Maximal degree in co-relation 3281. Up to 1593 conditions per place. [2024-06-14 13:34:47,831 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 13:34:47,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-14 13:34:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:34:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:34:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-14 13:34:47,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 13:34:47,842 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-14 13:34:47,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-14 13:34:47,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:34:47,845 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 13:34:47,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 13:34:47,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 13:34:47,849 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 13:34:47,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:47,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:47,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:47,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:34:47,850 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)] === [2024-06-14 13:34:47,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash 631156512, now seen corresponding path program 1 times [2024-06-14 13:34:47,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:47,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805306676] [2024-06-14 13:34:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:47,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:48,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:48,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805306676] [2024-06-14 13:34:48,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805306676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:48,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:48,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:34:48,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048335544] [2024-06-14 13:34:48,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:48,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:34:48,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:48,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:34:48,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:34:48,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 13:34:48,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:48,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:48,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 13:34:48,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:48,528 INFO L124 PetriNetUnfolderBase]: 1053/1621 cut-off events. [2024-06-14 13:34:48,528 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2024-06-14 13:34:48,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3746 conditions, 1621 events. 1053/1621 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7908 event pairs, 618 based on Foata normal form. 3/1621 useless extension candidates. Maximal degree in co-relation 3731. Up to 1569 conditions per place. [2024-06-14 13:34:48,538 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 13:34:48,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-14 13:34:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:34:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:34:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-14 13:34:48,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 13:34:48,542 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 94 transitions. [2024-06-14 13:34:48,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-14 13:34:48,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:34:48,544 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 13:34:48,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 13:34:48,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 13:34:48,545 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 13:34:48,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:48,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:48,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:48,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:34:48,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:48,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1104764257, now seen corresponding path program 1 times [2024-06-14 13:34:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:48,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125309225] [2024-06-14 13:34:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:49,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:49,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125309225] [2024-06-14 13:34:49,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125309225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:49,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:49,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:34:49,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108643266] [2024-06-14 13:34:49,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:49,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:34:49,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:49,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:34:49,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:34:49,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:34:49,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:49,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:49,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:34:49,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:49,627 INFO L124 PetriNetUnfolderBase]: 1342/2033 cut-off events. [2024-06-14 13:34:49,627 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-14 13:34:49,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5208 conditions, 2033 events. 1342/2033 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9599 event pairs, 822 based on Foata normal form. 2/2034 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-14 13:34:49,636 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-14 13:34:49,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 274 flow [2024-06-14 13:34:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:34:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:34:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 13:34:49,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 13:34:49,638 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 92 transitions. [2024-06-14 13:34:49,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 274 flow [2024-06-14 13:34:49,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 260 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:34:49,640 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 166 flow [2024-06-14 13:34:49,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 13:34:49,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-14 13:34:49,641 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 166 flow [2024-06-14 13:34:49,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:49,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:49,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:49,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:34:49,642 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)] === [2024-06-14 13:34:49,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:49,642 INFO L85 PathProgramCache]: Analyzing trace with hash -867182242, now seen corresponding path program 1 times [2024-06-14 13:34:49,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:49,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642368258] [2024-06-14 13:34:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:49,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:50,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:50,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642368258] [2024-06-14 13:34:50,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642368258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:50,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:50,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:34:50,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899655411] [2024-06-14 13:34:50,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:50,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:34:50,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:50,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:34:50,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:34:50,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:34:50,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:50,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:50,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:34:50,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:50,581 INFO L124 PetriNetUnfolderBase]: 1333/2018 cut-off events. [2024-06-14 13:34:50,582 INFO L125 PetriNetUnfolderBase]: For 1936/1936 co-relation queries the response was YES. [2024-06-14 13:34:50,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5647 conditions, 2018 events. 1333/2018 cut-off events. For 1936/1936 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9644 event pairs, 467 based on Foata normal form. 6/2023 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-14 13:34:50,594 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-14 13:34:50,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 384 flow [2024-06-14 13:34:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-14 13:34:50,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-14 13:34:50,597 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 166 flow. Second operand 6 states and 127 transitions. [2024-06-14 13:34:50,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 384 flow [2024-06-14 13:34:50,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 366 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:34:50,600 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-14 13:34:50,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-14 13:34:50,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 13:34:50,601 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-14 13:34:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:50,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:50,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:50,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:34:50,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:34:50,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash 73616824, now seen corresponding path program 1 times [2024-06-14 13:34:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:50,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334511733] [2024-06-14 13:34:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:51,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:51,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334511733] [2024-06-14 13:34:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334511733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:51,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:51,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:34:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445438696] [2024-06-14 13:34:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:51,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:34:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:34:51,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:34:51,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:34:51,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:51,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:51,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:34:51,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:51,901 INFO L124 PetriNetUnfolderBase]: 1323/2004 cut-off events. [2024-06-14 13:34:51,901 INFO L125 PetriNetUnfolderBase]: For 3162/3162 co-relation queries the response was YES. [2024-06-14 13:34:51,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6115 conditions, 2004 events. 1323/2004 cut-off events. For 3162/3162 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9520 event pairs, 556 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 6095. Up to 1948 conditions per place. [2024-06-14 13:34:51,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-14 13:34:51,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 385 flow [2024-06-14 13:34:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:34:51,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:34:51,918 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:34:51,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 385 flow [2024-06-14 13:34:51,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 356 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:34:51,938 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-14 13:34:51,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-14 13:34:51,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-14 13:34:51,939 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-14 13:34:51,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:51,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:51,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:51,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:34:51,940 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)] === [2024-06-14 13:34:51,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:51,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2019520076, now seen corresponding path program 1 times [2024-06-14 13:34:51,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:51,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701346044] [2024-06-14 13:34:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:51,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:52,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:52,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701346044] [2024-06-14 13:34:52,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701346044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:52,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:52,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:34:52,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568232497] [2024-06-14 13:34:52,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:52,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:34:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:34:52,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:34:52,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:34:52,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:52,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:52,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:34:52,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:53,089 INFO L124 PetriNetUnfolderBase]: 1334/2026 cut-off events. [2024-06-14 13:34:53,090 INFO L125 PetriNetUnfolderBase]: For 4463/4467 co-relation queries the response was YES. [2024-06-14 13:34:53,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6634 conditions, 2026 events. 1334/2026 cut-off events. For 4463/4467 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9742 event pairs, 557 based on Foata normal form. 6/2031 useless extension candidates. Maximal degree in co-relation 6612. Up to 1947 conditions per place. [2024-06-14 13:34:53,102 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-14 13:34:53,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 482 flow [2024-06-14 13:34:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 13:34:53,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 13:34:53,104 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 114 transitions. [2024-06-14 13:34:53,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 482 flow [2024-06-14 13:34:53,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 452 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:53,107 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 288 flow [2024-06-14 13:34:53,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-14 13:34:53,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 13:34:53,108 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 288 flow [2024-06-14 13:34:53,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:53,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:53,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:53,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:34:53,109 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)] === [2024-06-14 13:34:53,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:53,109 INFO L85 PathProgramCache]: Analyzing trace with hash -782187626, now seen corresponding path program 2 times [2024-06-14 13:34:53,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:53,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247459061] [2024-06-14 13:34:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:53,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:53,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:53,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247459061] [2024-06-14 13:34:53,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247459061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:53,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:53,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:34:53,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472672704] [2024-06-14 13:34:53,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:53,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:34:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:34:53,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:34:53,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:34:53,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:53,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:53,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:34:53,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:54,135 INFO L124 PetriNetUnfolderBase]: 1329/2013 cut-off events. [2024-06-14 13:34:54,136 INFO L125 PetriNetUnfolderBase]: For 5982/5982 co-relation queries the response was YES. [2024-06-14 13:34:54,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7061 conditions, 2013 events. 1329/2013 cut-off events. For 5982/5982 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9690 event pairs, 560 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 7038. Up to 1942 conditions per place. [2024-06-14 13:34:54,147 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-14 13:34:54,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 456 flow [2024-06-14 13:34:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 13:34:54,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-14 13:34:54,149 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 288 flow. Second operand 6 states and 109 transitions. [2024-06-14 13:34:54,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 456 flow [2024-06-14 13:34:54,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 422 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 13:34:54,154 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 294 flow [2024-06-14 13:34:54,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-14 13:34:54,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-14 13:34:54,155 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 294 flow [2024-06-14 13:34:54,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:54,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:54,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:54,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:34:54,156 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)] === [2024-06-14 13:34:54,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash 594457391, now seen corresponding path program 1 times [2024-06-14 13:34:54,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638164313] [2024-06-14 13:34:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:54,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:54,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:54,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638164313] [2024-06-14 13:34:54,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638164313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:54,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:54,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:54,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676638006] [2024-06-14 13:34:54,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:54,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:54,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:54,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:54,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:34:54,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:34:54,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:54,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:34:54,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:55,460 INFO L124 PetriNetUnfolderBase]: 1408/2140 cut-off events. [2024-06-14 13:34:55,460 INFO L125 PetriNetUnfolderBase]: For 7633/7633 co-relation queries the response was YES. [2024-06-14 13:34:55,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7675 conditions, 2140 events. 1408/2140 cut-off events. For 7633/7633 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10320 event pairs, 515 based on Foata normal form. 4/2142 useless extension candidates. Maximal degree in co-relation 7650. Up to 1947 conditions per place. [2024-06-14 13:34:55,486 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 69 selfloop transitions, 36 changer transitions 0/110 dead transitions. [2024-06-14 13:34:55,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 791 flow [2024-06-14 13:34:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:34:55,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 13:34:55,489 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 294 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:34:55,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 791 flow [2024-06-14 13:34:55,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 713 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:55,500 INFO L231 Difference]: Finished difference. Result has 66 places, 76 transitions, 495 flow [2024-06-14 13:34:55,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=495, PETRI_PLACES=66, PETRI_TRANSITIONS=76} [2024-06-14 13:34:55,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-14 13:34:55,503 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 76 transitions, 495 flow [2024-06-14 13:34:55,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:34:55,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:55,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:55,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:34:55,505 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)] === [2024-06-14 13:34:55,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1139413649, now seen corresponding path program 2 times [2024-06-14 13:34:55,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:55,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722127575] [2024-06-14 13:34:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:55,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:56,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:56,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722127575] [2024-06-14 13:34:56,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722127575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:56,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:56,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:56,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491823052] [2024-06-14 13:34:56,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:56,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:56,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:56,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:34:56,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 76 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:34:56,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:56,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:34:56,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:56,930 INFO L124 PetriNetUnfolderBase]: 1444/2202 cut-off events. [2024-06-14 13:34:56,930 INFO L125 PetriNetUnfolderBase]: For 10053/10053 co-relation queries the response was YES. [2024-06-14 13:34:56,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 2202 events. 1444/2202 cut-off events. For 10053/10053 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10600 event pairs, 514 based on Foata normal form. 6/2206 useless extension candidates. Maximal degree in co-relation 8557. Up to 1979 conditions per place. [2024-06-14 13:34:56,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 42 changer transitions 0/110 dead transitions. [2024-06-14 13:34:56,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 885 flow [2024-06-14 13:34:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 13:34:56,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-14 13:34:56,946 INFO L175 Difference]: Start difference. First operand has 66 places, 76 transitions, 495 flow. Second operand 7 states and 135 transitions. [2024-06-14 13:34:56,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 885 flow [2024-06-14 13:34:56,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 859 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 13:34:56,955 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 630 flow [2024-06-14 13:34:56,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2024-06-14 13:34:56,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-14 13:34:56,956 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 630 flow [2024-06-14 13:34:56,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:34:56,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:56,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:56,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:34:56,957 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)] === [2024-06-14 13:34:56,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1522255093, now seen corresponding path program 3 times [2024-06-14 13:34:56,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:56,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138686856] [2024-06-14 13:34:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:57,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138686856] [2024-06-14 13:34:57,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138686856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:57,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:57,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:57,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905714708] [2024-06-14 13:34:57,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:57,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:57,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:57,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:34:57,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 630 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:34:57,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:57,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:34:57,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:58,229 INFO L124 PetriNetUnfolderBase]: 1480/2249 cut-off events. [2024-06-14 13:34:58,229 INFO L125 PetriNetUnfolderBase]: For 12327/12327 co-relation queries the response was YES. [2024-06-14 13:34:58,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9276 conditions, 2249 events. 1480/2249 cut-off events. For 12327/12327 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10872 event pairs, 510 based on Foata normal form. 6/2252 useless extension candidates. Maximal degree in co-relation 9246. Up to 2011 conditions per place. [2024-06-14 13:34:58,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 49 changer transitions 0/113 dead transitions. [2024-06-14 13:34:58,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 1036 flow [2024-06-14 13:34:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:34:58,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-14 13:34:58,245 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 630 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:34:58,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 1036 flow [2024-06-14 13:34:58,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 932 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:58,259 INFO L231 Difference]: Finished difference. Result has 73 places, 88 transitions, 713 flow [2024-06-14 13:34:58,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=713, PETRI_PLACES=73, PETRI_TRANSITIONS=88} [2024-06-14 13:34:58,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-14 13:34:58,261 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 88 transitions, 713 flow [2024-06-14 13:34:58,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:34:58,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:58,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:58,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:34:58,262 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)] === [2024-06-14 13:34:58,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash 302940463, now seen corresponding path program 4 times [2024-06-14 13:34:58,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:58,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982376626] [2024-06-14 13:34:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:58,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982376626] [2024-06-14 13:34:58,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982376626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:58,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:58,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:34:58,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168927225] [2024-06-14 13:34:58,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:34:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:34:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:34:59,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:34:59,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 88 transitions, 713 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:34:59,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:59,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:34:59,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:59,603 INFO L124 PetriNetUnfolderBase]: 1464/2229 cut-off events. [2024-06-14 13:34:59,603 INFO L125 PetriNetUnfolderBase]: For 12348/12348 co-relation queries the response was YES. [2024-06-14 13:34:59,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 2229 events. 1464/2229 cut-off events. For 12348/12348 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10752 event pairs, 513 based on Foata normal form. 6/2232 useless extension candidates. Maximal degree in co-relation 9060. Up to 1998 conditions per place. [2024-06-14 13:34:59,618 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 47 changer transitions 0/111 dead transitions. [2024-06-14 13:34:59,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 999 flow [2024-06-14 13:34:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:34:59,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-14 13:34:59,620 INFO L175 Difference]: Start difference. First operand has 73 places, 88 transitions, 713 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:34:59,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 999 flow [2024-06-14 13:34:59,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 866 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:59,637 INFO L231 Difference]: Finished difference. Result has 76 places, 88 transitions, 685 flow [2024-06-14 13:34:59,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=76, PETRI_TRANSITIONS=88} [2024-06-14 13:34:59,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-14 13:34:59,639 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 88 transitions, 685 flow [2024-06-14 13:34:59,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:34:59,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:59,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:59,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:34:59,640 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)] === [2024-06-14 13:34:59,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash 303217293, now seen corresponding path program 1 times [2024-06-14 13:34:59,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:59,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820934735] [2024-06-14 13:34:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:59,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:00,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:00,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820934735] [2024-06-14 13:35:00,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820934735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:00,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:00,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921572476] [2024-06-14 13:35:00,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:00,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:00,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:00,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:00,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:00,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 88 transitions, 685 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:00,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:00,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:00,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:01,203 INFO L124 PetriNetUnfolderBase]: 1456/2220 cut-off events. [2024-06-14 13:35:01,204 INFO L125 PetriNetUnfolderBase]: For 13624/13624 co-relation queries the response was YES. [2024-06-14 13:35:01,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9103 conditions, 2220 events. 1456/2220 cut-off events. For 13624/13624 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10673 event pairs, 519 based on Foata normal form. 4/2223 useless extension candidates. Maximal degree in co-relation 9072. Up to 2123 conditions per place. [2024-06-14 13:35:01,215 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-14 13:35:01,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 983 flow [2024-06-14 13:35:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:35:01,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 13:35:01,216 INFO L175 Difference]: Start difference. First operand has 76 places, 88 transitions, 685 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:35:01,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 983 flow [2024-06-14 13:35:01,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 849 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:01,229 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 612 flow [2024-06-14 13:35:01,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=612, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2024-06-14 13:35:01,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-14 13:35:01,230 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 612 flow [2024-06-14 13:35:01,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:01,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:01,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:01,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:35:01,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:01,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:01,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1694568561, now seen corresponding path program 1 times [2024-06-14 13:35:01,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:01,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296143874] [2024-06-14 13:35:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:01,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:01,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:01,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296143874] [2024-06-14 13:35:01,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296143874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:01,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:01,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:35:01,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337854659] [2024-06-14 13:35:01,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:01,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:35:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:35:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:35:01,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:01,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 612 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2024-06-14 13:35:01,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:01,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:01,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:02,127 INFO L124 PetriNetUnfolderBase]: 1323/2087 cut-off events. [2024-06-14 13:35:02,128 INFO L125 PetriNetUnfolderBase]: For 14238/14238 co-relation queries the response was YES. [2024-06-14 13:35:02,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8591 conditions, 2087 events. 1323/2087 cut-off events. For 14238/14238 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10168 event pairs, 556 based on Foata normal form. 1/2087 useless extension candidates. Maximal degree in co-relation 8559. Up to 1959 conditions per place. [2024-06-14 13:35:02,140 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 73 selfloop transitions, 8 changer transitions 0/101 dead transitions. [2024-06-14 13:35:02,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 101 transitions, 818 flow [2024-06-14 13:35:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:35:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:35:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:35:02,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 13:35:02,142 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 612 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:35:02,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 101 transitions, 818 flow [2024-06-14 13:35:02,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 775 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:02,153 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 617 flow [2024-06-14 13:35:02,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2024-06-14 13:35:02,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-14 13:35:02,154 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 617 flow [2024-06-14 13:35:02,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2024-06-14 13:35:02,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:02,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:02,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:35:02,155 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)] === [2024-06-14 13:35:02,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1845312873, now seen corresponding path program 1 times [2024-06-14 13:35:02,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:02,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173276797] [2024-06-14 13:35:02,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:02,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:02,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:02,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173276797] [2024-06-14 13:35:02,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173276797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:02,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:02,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:02,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344703913] [2024-06-14 13:35:02,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:02,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:02,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:02,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:02,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:02,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:02,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 617 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:35:02,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:02,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:02,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:03,276 INFO L124 PetriNetUnfolderBase]: 1464/2239 cut-off events. [2024-06-14 13:35:03,276 INFO L125 PetriNetUnfolderBase]: For 16613/16613 co-relation queries the response was YES. [2024-06-14 13:35:03,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9621 conditions, 2239 events. 1464/2239 cut-off events. For 16613/16613 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10743 event pairs, 529 based on Foata normal form. 2/2240 useless extension candidates. Maximal degree in co-relation 9588. Up to 2130 conditions per place. [2024-06-14 13:35:03,288 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 17 changer transitions 0/121 dead transitions. [2024-06-14 13:35:03,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 957 flow [2024-06-14 13:35:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:35:03,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-14 13:35:03,289 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 617 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:35:03,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 957 flow [2024-06-14 13:35:03,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 931 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:03,302 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 667 flow [2024-06-14 13:35:03,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=80, PETRI_TRANSITIONS=96} [2024-06-14 13:35:03,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-14 13:35:03,303 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 667 flow [2024-06-14 13:35:03,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:35:03,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:03,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:03,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:35:03,304 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)] === [2024-06-14 13:35:03,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash 962078651, now seen corresponding path program 2 times [2024-06-14 13:35:03,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:03,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581494138] [2024-06-14 13:35:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:03,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:03,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581494138] [2024-06-14 13:35:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581494138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:03,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:03,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774550119] [2024-06-14 13:35:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:03,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:03,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:04,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:04,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 96 transitions, 667 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:35:04,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:04,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:04,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:04,495 INFO L124 PetriNetUnfolderBase]: 1475/2259 cut-off events. [2024-06-14 13:35:04,495 INFO L125 PetriNetUnfolderBase]: For 19490/19492 co-relation queries the response was YES. [2024-06-14 13:35:04,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10208 conditions, 2259 events. 1475/2259 cut-off events. For 19490/19492 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10959 event pairs, 523 based on Foata normal form. 4/2262 useless extension candidates. Maximal degree in co-relation 10174. Up to 2075 conditions per place. [2024-06-14 13:35:04,506 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 34 changer transitions 0/128 dead transitions. [2024-06-14 13:35:04,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 1115 flow [2024-06-14 13:35:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:35:04,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-14 13:35:04,508 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 667 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:35:04,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 1115 flow [2024-06-14 13:35:04,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 1063 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:04,525 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 767 flow [2024-06-14 13:35:04,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=767, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-14 13:35:04,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 13:35:04,527 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 767 flow [2024-06-14 13:35:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:35:04,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:04,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:35:04,527 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)] === [2024-06-14 13:35:04,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 630515387, now seen corresponding path program 3 times [2024-06-14 13:35:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:04,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38792795] [2024-06-14 13:35:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:05,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:05,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38792795] [2024-06-14 13:35:05,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38792795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:05,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:05,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:05,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230219958] [2024-06-14 13:35:05,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:05,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:05,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:05,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:05,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 767 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:35:05,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:05,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:05,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:05,734 INFO L124 PetriNetUnfolderBase]: 1470/2243 cut-off events. [2024-06-14 13:35:05,735 INFO L125 PetriNetUnfolderBase]: For 22776/22776 co-relation queries the response was YES. [2024-06-14 13:35:05,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10625 conditions, 2243 events. 1470/2243 cut-off events. For 22776/22776 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10868 event pairs, 531 based on Foata normal form. 2/2241 useless extension candidates. Maximal degree in co-relation 10590. Up to 2070 conditions per place. [2024-06-14 13:35:05,748 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 85 selfloop transitions, 33 changer transitions 0/123 dead transitions. [2024-06-14 13:35:05,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1075 flow [2024-06-14 13:35:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:35:05,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 13:35:05,749 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 767 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:35:05,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1075 flow [2024-06-14 13:35:05,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 1007 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:05,770 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 774 flow [2024-06-14 13:35:05,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=774, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-06-14 13:35:05,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-14 13:35:05,770 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 774 flow [2024-06-14 13:35:05,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-14 13:35:05,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:05,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:05,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:35:05,771 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:05,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash 992019018, now seen corresponding path program 1 times [2024-06-14 13:35:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:05,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724796483] [2024-06-14 13:35:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:05,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:06,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:06,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724796483] [2024-06-14 13:35:06,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724796483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:06,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:06,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:06,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897970431] [2024-06-14 13:35:06,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:06,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:06,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:06,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:06,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:06,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-14 13:35:06,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:06,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:06,732 INFO L124 PetriNetUnfolderBase]: 1342/2124 cut-off events. [2024-06-14 13:35:06,732 INFO L125 PetriNetUnfolderBase]: For 24687/24692 co-relation queries the response was YES. [2024-06-14 13:35:06,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10220 conditions, 2124 events. 1342/2124 cut-off events. For 24687/24692 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10479 event pairs, 527 based on Foata normal form. 3/2124 useless extension candidates. Maximal degree in co-relation 10183. Up to 1934 conditions per place. [2024-06-14 13:35:06,745 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 21 changer transitions 0/121 dead transitions. [2024-06-14 13:35:06,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 121 transitions, 1096 flow [2024-06-14 13:35:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:35:06,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 13:35:06,747 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 774 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:35:06,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 121 transitions, 1096 flow [2024-06-14 13:35:06,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 1010 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:06,767 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 815 flow [2024-06-14 13:35:06,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=815, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-14 13:35:06,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-14 13:35:06,767 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 815 flow [2024-06-14 13:35:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-14 13:35:06,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:06,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:06,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:35:06,768 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)] === [2024-06-14 13:35:06,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash 621200880, now seen corresponding path program 1 times [2024-06-14 13:35:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:06,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817018438] [2024-06-14 13:35:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:06,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:07,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817018438] [2024-06-14 13:35:07,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817018438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:07,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:07,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:07,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145160032] [2024-06-14 13:35:07,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:07,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:07,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:07,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:07,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:07,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:07,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:07,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:07,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:08,004 INFO L124 PetriNetUnfolderBase]: 1585/2438 cut-off events. [2024-06-14 13:35:08,004 INFO L125 PetriNetUnfolderBase]: For 30405/30405 co-relation queries the response was YES. [2024-06-14 13:35:08,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 2438 events. 1585/2438 cut-off events. For 30405/30405 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12000 event pairs, 521 based on Foata normal form. 4/2441 useless extension candidates. Maximal degree in co-relation 12301. Up to 2234 conditions per place. [2024-06-14 13:35:08,017 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 133 selfloop transitions, 36 changer transitions 0/174 dead transitions. [2024-06-14 13:35:08,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 174 transitions, 1552 flow [2024-06-14 13:35:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:35:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:35:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-14 13:35:08,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-14 13:35:08,019 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 815 flow. Second operand 11 states and 200 transitions. [2024-06-14 13:35:08,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 174 transitions, 1552 flow [2024-06-14 13:35:08,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1511 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 13:35:08,040 INFO L231 Difference]: Finished difference. Result has 99 places, 130 transitions, 1062 flow [2024-06-14 13:35:08,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1062, PETRI_PLACES=99, PETRI_TRANSITIONS=130} [2024-06-14 13:35:08,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-14 13:35:08,041 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 130 transitions, 1062 flow [2024-06-14 13:35:08,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:08,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:08,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:08,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:35:08,041 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)] === [2024-06-14 13:35:08,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash -387941678, now seen corresponding path program 2 times [2024-06-14 13:35:08,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:08,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876367044] [2024-06-14 13:35:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:08,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:08,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:08,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876367044] [2024-06-14 13:35:08,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876367044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:08,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:08,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:08,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578612905] [2024-06-14 13:35:08,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:08,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:08,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:08,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 130 transitions, 1062 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:08,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:08,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:08,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:09,338 INFO L124 PetriNetUnfolderBase]: 1569/2414 cut-off events. [2024-06-14 13:35:09,339 INFO L125 PetriNetUnfolderBase]: For 34284/34284 co-relation queries the response was YES. [2024-06-14 13:35:09,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12823 conditions, 2414 events. 1569/2414 cut-off events. For 34284/34284 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11907 event pairs, 520 based on Foata normal form. 6/2419 useless extension candidates. Maximal degree in co-relation 12779. Up to 2221 conditions per place. [2024-06-14 13:35:09,353 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-06-14 13:35:09,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1491 flow [2024-06-14 13:35:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:35:09,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:35:09,355 INFO L175 Difference]: Start difference. First operand has 99 places, 130 transitions, 1062 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:35:09,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1491 flow [2024-06-14 13:35:09,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 160 transitions, 1382 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:09,380 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1038 flow [2024-06-14 13:35:09,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1038, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2024-06-14 13:35:09,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-14 13:35:09,381 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1038 flow [2024-06-14 13:35:09,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:09,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:09,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:09,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:35:09,381 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)] === [2024-06-14 13:35:09,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:09,382 INFO L85 PathProgramCache]: Analyzing trace with hash 593026860, now seen corresponding path program 3 times [2024-06-14 13:35:09,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:09,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870389203] [2024-06-14 13:35:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:09,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:10,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:10,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870389203] [2024-06-14 13:35:10,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870389203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:10,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:10,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:10,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210590483] [2024-06-14 13:35:10,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:10,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:10,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:10,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:10,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1038 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:10,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:10,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:10,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:10,757 INFO L124 PetriNetUnfolderBase]: 1623/2495 cut-off events. [2024-06-14 13:35:10,757 INFO L125 PetriNetUnfolderBase]: For 37898/37898 co-relation queries the response was YES. [2024-06-14 13:35:10,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13494 conditions, 2495 events. 1623/2495 cut-off events. For 37898/37898 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12412 event pairs, 468 based on Foata normal form. 4/2497 useless extension candidates. Maximal degree in co-relation 13448. Up to 1989 conditions per place. [2024-06-14 13:35:10,773 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 74 changer transitions 0/175 dead transitions. [2024-06-14 13:35:10,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 175 transitions, 1777 flow [2024-06-14 13:35:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 13:35:10,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-14 13:35:10,776 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1038 flow. Second operand 8 states and 157 transitions. [2024-06-14 13:35:10,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 175 transitions, 1777 flow [2024-06-14 13:35:10,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 175 transitions, 1688 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:10,804 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1253 flow [2024-06-14 13:35:10,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1253, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-14 13:35:10,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-14 13:35:10,805 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1253 flow [2024-06-14 13:35:10,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:10,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:10,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:10,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:35:10,805 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)] === [2024-06-14 13:35:10,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:10,806 INFO L85 PathProgramCache]: Analyzing trace with hash -240332078, now seen corresponding path program 4 times [2024-06-14 13:35:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:10,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717784039] [2024-06-14 13:35:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:11,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:11,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717784039] [2024-06-14 13:35:11,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717784039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:11,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:11,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:11,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866671737] [2024-06-14 13:35:11,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:11,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:11,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:11,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:11,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1253 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:11,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:11,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:11,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:12,265 INFO L124 PetriNetUnfolderBase]: 1613/2490 cut-off events. [2024-06-14 13:35:12,265 INFO L125 PetriNetUnfolderBase]: For 38972/38972 co-relation queries the response was YES. [2024-06-14 13:35:12,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13750 conditions, 2490 events. 1613/2490 cut-off events. For 38972/38972 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12438 event pairs, 471 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 13704. Up to 1981 conditions per place. [2024-06-14 13:35:12,280 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 73 changer transitions 0/172 dead transitions. [2024-06-14 13:35:12,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 172 transitions, 1773 flow [2024-06-14 13:35:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 13:35:12,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-14 13:35:12,282 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1253 flow. Second operand 8 states and 157 transitions. [2024-06-14 13:35:12,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 172 transitions, 1773 flow [2024-06-14 13:35:12,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 172 transitions, 1671 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:12,316 INFO L231 Difference]: Finished difference. Result has 109 places, 139 transitions, 1305 flow [2024-06-14 13:35:12,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1305, PETRI_PLACES=109, PETRI_TRANSITIONS=139} [2024-06-14 13:35:12,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-14 13:35:12,317 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 139 transitions, 1305 flow [2024-06-14 13:35:12,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:12,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:12,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:12,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:35:12,317 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)] === [2024-06-14 13:35:12,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1319303268, now seen corresponding path program 1 times [2024-06-14 13:35:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:12,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542854644] [2024-06-14 13:35:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:12,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:13,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:13,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542854644] [2024-06-14 13:35:13,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542854644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:13,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:13,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:13,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100928203] [2024-06-14 13:35:13,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:13,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:13,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:13,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:13,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:13,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:13,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 139 transitions, 1305 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:13,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:13,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:13,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:14,004 INFO L124 PetriNetUnfolderBase]: 1630/2515 cut-off events. [2024-06-14 13:35:14,004 INFO L125 PetriNetUnfolderBase]: For 41446/41446 co-relation queries the response was YES. [2024-06-14 13:35:14,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 2515 events. 1630/2515 cut-off events. For 41446/41446 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12536 event pairs, 485 based on Foata normal form. 4/2517 useless extension candidates. Maximal degree in co-relation 13928. Up to 2216 conditions per place. [2024-06-14 13:35:14,021 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 50 changer transitions 0/172 dead transitions. [2024-06-14 13:35:14,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 172 transitions, 1787 flow [2024-06-14 13:35:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:35:14,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-14 13:35:14,022 INFO L175 Difference]: Start difference. First operand has 109 places, 139 transitions, 1305 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:35:14,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 172 transitions, 1787 flow [2024-06-14 13:35:14,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 172 transitions, 1609 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:14,060 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 1270 flow [2024-06-14 13:35:14,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1270, PETRI_PLACES=110, PETRI_TRANSITIONS=141} [2024-06-14 13:35:14,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-14 13:35:14,061 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 1270 flow [2024-06-14 13:35:14,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:14,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:14,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:14,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:35:14,062 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:14,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash 675424656, now seen corresponding path program 1 times [2024-06-14 13:35:14,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:14,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155070553] [2024-06-14 13:35:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:14,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:14,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:14,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155070553] [2024-06-14 13:35:14,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155070553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:14,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:14,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:14,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033801659] [2024-06-14 13:35:14,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:14,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:14,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:14,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:14,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 141 transitions, 1270 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-14 13:35:14,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:14,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:14,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:15,136 INFO L124 PetriNetUnfolderBase]: 1499/2388 cut-off events. [2024-06-14 13:35:15,137 INFO L125 PetriNetUnfolderBase]: For 43635/43640 co-relation queries the response was YES. [2024-06-14 13:35:15,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13434 conditions, 2388 events. 1499/2388 cut-off events. For 43635/43640 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12242 event pairs, 511 based on Foata normal form. 2/2381 useless extension candidates. Maximal degree in co-relation 13385. Up to 2156 conditions per place. [2024-06-14 13:35:15,151 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 120 selfloop transitions, 18 changer transitions 0/159 dead transitions. [2024-06-14 13:35:15,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 159 transitions, 1634 flow [2024-06-14 13:35:15,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 13:35:15,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 13:35:15,153 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 1270 flow. Second operand 6 states and 111 transitions. [2024-06-14 13:35:15,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 159 transitions, 1634 flow [2024-06-14 13:35:15,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1513 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:15,200 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1230 flow [2024-06-14 13:35:15,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1230, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2024-06-14 13:35:15,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-14 13:35:15,200 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1230 flow [2024-06-14 13:35:15,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-14 13:35:15,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:15,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:15,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:35:15,201 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:15,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1439467782, now seen corresponding path program 5 times [2024-06-14 13:35:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:15,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962397945] [2024-06-14 13:35:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:15,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:15,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962397945] [2024-06-14 13:35:15,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962397945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:15,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:15,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:15,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085510695] [2024-06-14 13:35:15,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:16,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:16,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1230 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:16,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:16,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:16,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:16,739 INFO L124 PetriNetUnfolderBase]: 1662/2565 cut-off events. [2024-06-14 13:35:16,740 INFO L125 PetriNetUnfolderBase]: For 48349/48349 co-relation queries the response was YES. [2024-06-14 13:35:16,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14427 conditions, 2565 events. 1662/2565 cut-off events. For 48349/48349 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12926 event pairs, 461 based on Foata normal form. 4/2564 useless extension candidates. Maximal degree in co-relation 14377. Up to 2041 conditions per place. [2024-06-14 13:35:16,757 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 95 selfloop transitions, 78 changer transitions 0/178 dead transitions. [2024-06-14 13:35:16,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 178 transitions, 1821 flow [2024-06-14 13:35:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:35:16,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:35:16,758 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1230 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:35:16,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 178 transitions, 1821 flow [2024-06-14 13:35:16,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 178 transitions, 1778 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:16,815 INFO L231 Difference]: Finished difference. Result has 114 places, 147 transitions, 1402 flow [2024-06-14 13:35:16,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=114, PETRI_TRANSITIONS=147} [2024-06-14 13:35:16,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-14 13:35:16,816 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 147 transitions, 1402 flow [2024-06-14 13:35:16,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:16,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:16,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:16,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:35:16,817 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)] === [2024-06-14 13:35:16,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1405558872, now seen corresponding path program 6 times [2024-06-14 13:35:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829798372] [2024-06-14 13:35:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:17,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:17,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829798372] [2024-06-14 13:35:17,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829798372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:17,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:17,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:17,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727050410] [2024-06-14 13:35:17,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:17,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:17,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:17,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:17,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 147 transitions, 1402 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:17,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:17,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:17,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:18,224 INFO L124 PetriNetUnfolderBase]: 1684/2601 cut-off events. [2024-06-14 13:35:18,224 INFO L125 PetriNetUnfolderBase]: For 53555/53555 co-relation queries the response was YES. [2024-06-14 13:35:18,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15139 conditions, 2601 events. 1684/2601 cut-off events. For 53555/53555 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13111 event pairs, 468 based on Foata normal form. 4/2600 useless extension candidates. Maximal degree in co-relation 15088. Up to 2060 conditions per place. [2024-06-14 13:35:18,244 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 101 selfloop transitions, 76 changer transitions 0/182 dead transitions. [2024-06-14 13:35:18,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 182 transitions, 2016 flow [2024-06-14 13:35:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:35:18,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 13:35:18,247 INFO L175 Difference]: Start difference. First operand has 114 places, 147 transitions, 1402 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:35:18,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 182 transitions, 2016 flow [2024-06-14 13:35:18,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 182 transitions, 1847 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:18,304 INFO L231 Difference]: Finished difference. Result has 117 places, 150 transitions, 1450 flow [2024-06-14 13:35:18,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1450, PETRI_PLACES=117, PETRI_TRANSITIONS=150} [2024-06-14 13:35:18,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-14 13:35:18,305 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 150 transitions, 1450 flow [2024-06-14 13:35:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:18,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:18,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:18,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:35:18,306 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)] === [2024-06-14 13:35:18,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash -932179472, now seen corresponding path program 7 times [2024-06-14 13:35:18,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:18,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372410416] [2024-06-14 13:35:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:18,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:18,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:18,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372410416] [2024-06-14 13:35:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372410416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:18,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:18,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641157291] [2024-06-14 13:35:18,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:18,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:18,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 150 transitions, 1450 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:18,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:18,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:18,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:19,594 INFO L124 PetriNetUnfolderBase]: 1674/2589 cut-off events. [2024-06-14 13:35:19,595 INFO L125 PetriNetUnfolderBase]: For 56286/56286 co-relation queries the response was YES. [2024-06-14 13:35:19,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15032 conditions, 2589 events. 1674/2589 cut-off events. For 56286/56286 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13058 event pairs, 472 based on Foata normal form. 4/2588 useless extension candidates. Maximal degree in co-relation 14980. Up to 2052 conditions per place. [2024-06-14 13:35:19,609 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 79 changer transitions 0/178 dead transitions. [2024-06-14 13:35:19,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 178 transitions, 1900 flow [2024-06-14 13:35:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:35:19,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:35:19,611 INFO L175 Difference]: Start difference. First operand has 117 places, 150 transitions, 1450 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:35:19,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 178 transitions, 1900 flow [2024-06-14 13:35:19,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 178 transitions, 1606 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 13:35:19,680 INFO L231 Difference]: Finished difference. Result has 117 places, 150 transitions, 1322 flow [2024-06-14 13:35:19,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1322, PETRI_PLACES=117, PETRI_TRANSITIONS=150} [2024-06-14 13:35:19,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-14 13:35:19,681 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 150 transitions, 1322 flow [2024-06-14 13:35:19,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:19,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:19,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:19,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:35:19,681 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)] === [2024-06-14 13:35:19,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1662326788, now seen corresponding path program 2 times [2024-06-14 13:35:19,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:19,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184462149] [2024-06-14 13:35:19,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:19,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:20,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:20,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184462149] [2024-06-14 13:35:20,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184462149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:20,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:20,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:20,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70199158] [2024-06-14 13:35:20,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:20,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:20,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:20,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:20,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:20,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:20,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 150 transitions, 1322 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:20,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:20,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:20,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:21,248 INFO L124 PetriNetUnfolderBase]: 1691/2625 cut-off events. [2024-06-14 13:35:21,248 INFO L125 PetriNetUnfolderBase]: For 59036/59036 co-relation queries the response was YES. [2024-06-14 13:35:21,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15089 conditions, 2625 events. 1691/2625 cut-off events. For 59036/59036 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13345 event pairs, 479 based on Foata normal form. 4/2626 useless extension candidates. Maximal degree in co-relation 15037. Up to 2312 conditions per place. [2024-06-14 13:35:21,266 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 124 selfloop transitions, 51 changer transitions 0/180 dead transitions. [2024-06-14 13:35:21,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 180 transitions, 1814 flow [2024-06-14 13:35:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:35:21,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:35:21,268 INFO L175 Difference]: Start difference. First operand has 117 places, 150 transitions, 1322 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:35:21,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 180 transitions, 1814 flow [2024-06-14 13:35:21,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1645 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:21,329 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1301 flow [2024-06-14 13:35:21,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1301, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-06-14 13:35:21,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-14 13:35:21,330 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1301 flow [2024-06-14 13:35:21,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:21,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:21,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:21,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:35:21,330 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)] === [2024-06-14 13:35:21,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash -924545536, now seen corresponding path program 3 times [2024-06-14 13:35:21,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:21,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649067864] [2024-06-14 13:35:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:21,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:22,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649067864] [2024-06-14 13:35:22,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649067864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:22,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:22,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:22,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987207546] [2024-06-14 13:35:22,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:22,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:22,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:22,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:22,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1301 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:22,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:22,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:22,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:22,875 INFO L124 PetriNetUnfolderBase]: 1708/2652 cut-off events. [2024-06-14 13:35:22,875 INFO L125 PetriNetUnfolderBase]: For 63973/63973 co-relation queries the response was YES. [2024-06-14 13:35:22,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15446 conditions, 2652 events. 1708/2652 cut-off events. For 63973/63973 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13512 event pairs, 452 based on Foata normal form. 4/2653 useless extension candidates. Maximal degree in co-relation 15393. Up to 2245 conditions per place. [2024-06-14 13:35:22,893 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 58 changer transitions 0/186 dead transitions. [2024-06-14 13:35:22,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 186 transitions, 1947 flow [2024-06-14 13:35:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:35:22,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:35:22,895 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1301 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:35:22,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 186 transitions, 1947 flow [2024-06-14 13:35:22,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 186 transitions, 1819 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:22,947 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1376 flow [2024-06-14 13:35:22,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-14 13:35:22,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 13:35:22,952 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1376 flow [2024-06-14 13:35:22,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:22,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:22,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:22,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:35:22,953 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)] === [2024-06-14 13:35:22,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:22,953 INFO L85 PathProgramCache]: Analyzing trace with hash -931964146, now seen corresponding path program 4 times [2024-06-14 13:35:22,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:22,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277070338] [2024-06-14 13:35:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:22,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:23,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:23,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277070338] [2024-06-14 13:35:23,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277070338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:23,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:23,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:23,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678535579] [2024-06-14 13:35:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:23,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:23,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:23,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1376 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:23,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:23,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:23,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:24,484 INFO L124 PetriNetUnfolderBase]: 1700/2642 cut-off events. [2024-06-14 13:35:24,484 INFO L125 PetriNetUnfolderBase]: For 67754/67754 co-relation queries the response was YES. [2024-06-14 13:35:24,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15582 conditions, 2642 events. 1700/2642 cut-off events. For 67754/67754 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13382 event pairs, 483 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 15528. Up to 2327 conditions per place. [2024-06-14 13:35:24,501 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 49 changer transitions 0/184 dead transitions. [2024-06-14 13:35:24,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 184 transitions, 1836 flow [2024-06-14 13:35:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:35:24,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:35:24,503 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1376 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:35:24,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 184 transitions, 1836 flow [2024-06-14 13:35:24,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 184 transitions, 1722 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:24,568 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1368 flow [2024-06-14 13:35:24,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1368, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-06-14 13:35:24,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-14 13:35:24,569 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1368 flow [2024-06-14 13:35:24,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:24,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:24,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:24,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:35:24,570 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:24,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1851441276, now seen corresponding path program 2 times [2024-06-14 13:35:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:24,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128843456] [2024-06-14 13:35:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:24,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:25,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128843456] [2024-06-14 13:35:25,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128843456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:25,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:25,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:25,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41928644] [2024-06-14 13:35:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:25,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:25,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:25,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:25,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1368 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-14 13:35:25,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:25,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:25,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:25,726 INFO L124 PetriNetUnfolderBase]: 1540/2456 cut-off events. [2024-06-14 13:35:25,727 INFO L125 PetriNetUnfolderBase]: For 68729/68743 co-relation queries the response was YES. [2024-06-14 13:35:25,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14528 conditions, 2456 events. 1540/2456 cut-off events. For 68729/68743 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12639 event pairs, 515 based on Foata normal form. 4/2436 useless extension candidates. Maximal degree in co-relation 14472. Up to 2192 conditions per place. [2024-06-14 13:35:25,752 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 26 changer transitions 0/166 dead transitions. [2024-06-14 13:35:25,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 166 transitions, 1690 flow [2024-06-14 13:35:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 13:35:25,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-14 13:35:25,753 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1368 flow. Second operand 6 states and 109 transitions. [2024-06-14 13:35:25,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 166 transitions, 1690 flow [2024-06-14 13:35:25,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 166 transitions, 1560 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:25,865 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1298 flow [2024-06-14 13:35:25,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-14 13:35:25,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-14 13:35:25,866 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1298 flow [2024-06-14 13:35:25,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-14 13:35:25,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:25,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:35:25,867 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:25,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash 682097840, now seen corresponding path program 1 times [2024-06-14 13:35:25,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:25,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710034931] [2024-06-14 13:35:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:25,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:26,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710034931] [2024-06-14 13:35:26,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710034931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:26,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:26,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:26,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760564341] [2024-06-14 13:35:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:26,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:26,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:26,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:26,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:26,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:26,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1298 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:26,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:26,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:26,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:27,029 INFO L124 PetriNetUnfolderBase]: 1689/2631 cut-off events. [2024-06-14 13:35:27,029 INFO L125 PetriNetUnfolderBase]: For 72420/72420 co-relation queries the response was YES. [2024-06-14 13:35:27,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15574 conditions, 2631 events. 1689/2631 cut-off events. For 72420/72420 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13396 event pairs, 542 based on Foata normal form. 1/2631 useless extension candidates. Maximal degree in co-relation 15517. Up to 2503 conditions per place. [2024-06-14 13:35:27,048 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 155 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2024-06-14 13:35:27,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 171 transitions, 1706 flow [2024-06-14 13:35:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:35:27,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 13:35:27,049 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1298 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:35:27,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 171 transitions, 1706 flow [2024-06-14 13:35:27,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 171 transitions, 1635 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:27,114 INFO L231 Difference]: Finished difference. Result has 124 places, 159 transitions, 1291 flow [2024-06-14 13:35:27,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1291, PETRI_PLACES=124, PETRI_TRANSITIONS=159} [2024-06-14 13:35:27,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-14 13:35:27,115 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 159 transitions, 1291 flow [2024-06-14 13:35:27,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:27,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:27,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:27,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:35:27,116 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:27,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1851448220, now seen corresponding path program 2 times [2024-06-14 13:35:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:27,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620003023] [2024-06-14 13:35:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:27,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:27,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:27,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620003023] [2024-06-14 13:35:27,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620003023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:27,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:27,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:27,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317298868] [2024-06-14 13:35:27,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:27,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:27,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:27,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:27,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 159 transitions, 1291 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:27,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:27,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:27,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:28,126 INFO L124 PetriNetUnfolderBase]: 1686/2628 cut-off events. [2024-06-14 13:35:28,126 INFO L125 PetriNetUnfolderBase]: For 76167/76169 co-relation queries the response was YES. [2024-06-14 13:35:28,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15842 conditions, 2628 events. 1686/2628 cut-off events. For 76167/76169 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13366 event pairs, 546 based on Foata normal form. 3/2630 useless extension candidates. Maximal degree in co-relation 15784. Up to 2493 conditions per place. [2024-06-14 13:35:28,146 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 150 selfloop transitions, 16 changer transitions 0/171 dead transitions. [2024-06-14 13:35:28,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 171 transitions, 1691 flow [2024-06-14 13:35:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:35:28,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:35:28,148 INFO L175 Difference]: Start difference. First operand has 124 places, 159 transitions, 1291 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:35:28,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 171 transitions, 1691 flow [2024-06-14 13:35:28,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1649 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:28,222 INFO L231 Difference]: Finished difference. Result has 126 places, 162 transitions, 1329 flow [2024-06-14 13:35:28,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1329, PETRI_PLACES=126, PETRI_TRANSITIONS=162} [2024-06-14 13:35:28,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-14 13:35:28,223 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 162 transitions, 1329 flow [2024-06-14 13:35:28,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:28,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:28,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:28,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:35:28,223 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:28,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash 687819696, now seen corresponding path program 1 times [2024-06-14 13:35:28,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:28,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727502001] [2024-06-14 13:35:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:28,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:29,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:29,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727502001] [2024-06-14 13:35:29,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727502001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:29,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:29,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470868166] [2024-06-14 13:35:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:29,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:29,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:29,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:29,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:29,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:29,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 162 transitions, 1329 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-14 13:35:29,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:29,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:29,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:29,535 INFO L124 PetriNetUnfolderBase]: 1560/2484 cut-off events. [2024-06-14 13:35:29,535 INFO L125 PetriNetUnfolderBase]: For 79375/79389 co-relation queries the response was YES. [2024-06-14 13:35:29,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15344 conditions, 2484 events. 1560/2484 cut-off events. For 79375/79389 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12765 event pairs, 512 based on Foata normal form. 3/2463 useless extension candidates. Maximal degree in co-relation 15285. Up to 2189 conditions per place. [2024-06-14 13:35:29,555 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 31 changer transitions 0/177 dead transitions. [2024-06-14 13:35:29,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 177 transitions, 1719 flow [2024-06-14 13:35:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:35:29,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 13:35:29,557 INFO L175 Difference]: Start difference. First operand has 126 places, 162 transitions, 1329 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:35:29,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 177 transitions, 1719 flow [2024-06-14 13:35:29,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 177 transitions, 1661 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:29,645 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1392 flow [2024-06-14 13:35:29,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1392, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-14 13:35:29,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-14 13:35:29,645 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1392 flow [2024-06-14 13:35:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-14 13:35:29,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:29,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:29,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:35:29,646 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)] === [2024-06-14 13:35:29,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1980946566, now seen corresponding path program 1 times [2024-06-14 13:35:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:29,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11163453] [2024-06-14 13:35:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:30,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:30,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11163453] [2024-06-14 13:35:30,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11163453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:30,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:30,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:30,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178166600] [2024-06-14 13:35:30,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:30,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:30,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:30,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:30,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:30,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:30,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1392 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:30,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:30,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:30,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:31,106 INFO L124 PetriNetUnfolderBase]: 1735/2706 cut-off events. [2024-06-14 13:35:31,106 INFO L125 PetriNetUnfolderBase]: For 87783/87783 co-relation queries the response was YES. [2024-06-14 13:35:31,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17334 conditions, 2706 events. 1735/2706 cut-off events. For 87783/87783 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13780 event pairs, 366 based on Foata normal form. 4/2709 useless extension candidates. Maximal degree in co-relation 17274. Up to 2430 conditions per place. [2024-06-14 13:35:31,127 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 31 changer transitions 0/207 dead transitions. [2024-06-14 13:35:31,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 207 transitions, 2133 flow [2024-06-14 13:35:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:35:31,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-14 13:35:31,132 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1392 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:35:31,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 207 transitions, 2133 flow [2024-06-14 13:35:31,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 207 transitions, 2040 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:31,259 INFO L231 Difference]: Finished difference. Result has 133 places, 170 transitions, 1460 flow [2024-06-14 13:35:31,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1460, PETRI_PLACES=133, PETRI_TRANSITIONS=170} [2024-06-14 13:35:31,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-14 13:35:31,259 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 170 transitions, 1460 flow [2024-06-14 13:35:31,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:31,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:31,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:31,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:35:31,260 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)] === [2024-06-14 13:35:31,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:31,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1026827840, now seen corresponding path program 2 times [2024-06-14 13:35:31,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:31,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503161246] [2024-06-14 13:35:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:31,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:31,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:31,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503161246] [2024-06-14 13:35:31,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503161246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:31,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:31,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:31,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005311064] [2024-06-14 13:35:31,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:31,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:31,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:31,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:31,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 170 transitions, 1460 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:31,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:31,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:31,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:32,565 INFO L124 PetriNetUnfolderBase]: 1727/2694 cut-off events. [2024-06-14 13:35:32,565 INFO L125 PetriNetUnfolderBase]: For 91962/91962 co-relation queries the response was YES. [2024-06-14 13:35:32,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 2694 events. 1727/2694 cut-off events. For 91962/91962 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13725 event pairs, 487 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 17370. Up to 2483 conditions per place. [2024-06-14 13:35:32,582 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 168 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2024-06-14 13:35:32,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 200 transitions, 1967 flow [2024-06-14 13:35:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:35:32,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 13:35:32,584 INFO L175 Difference]: Start difference. First operand has 133 places, 170 transitions, 1460 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:35:32,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 200 transitions, 1967 flow [2024-06-14 13:35:32,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 200 transitions, 1858 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:32,693 INFO L231 Difference]: Finished difference. Result has 136 places, 170 transitions, 1414 flow [2024-06-14 13:35:32,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1414, PETRI_PLACES=136, PETRI_TRANSITIONS=170} [2024-06-14 13:35:32,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-14 13:35:32,694 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 170 transitions, 1414 flow [2024-06-14 13:35:32,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:32,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:32,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:35:32,695 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)] === [2024-06-14 13:35:32,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1108277006, now seen corresponding path program 3 times [2024-06-14 13:35:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:32,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091069299] [2024-06-14 13:35:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:32,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:33,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:33,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091069299] [2024-06-14 13:35:33,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091069299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:33,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:33,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:33,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525469084] [2024-06-14 13:35:33,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:33,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:33,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:33,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:33,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 170 transitions, 1414 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:33,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:33,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:33,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:34,121 INFO L124 PetriNetUnfolderBase]: 1744/2718 cut-off events. [2024-06-14 13:35:34,122 INFO L125 PetriNetUnfolderBase]: For 97982/97984 co-relation queries the response was YES. [2024-06-14 13:35:34,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17661 conditions, 2718 events. 1744/2718 cut-off events. For 97982/97984 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13866 event pairs, 478 based on Foata normal form. 6/2723 useless extension candidates. Maximal degree in co-relation 17598. Up to 2449 conditions per place. [2024-06-14 13:35:34,141 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 44 changer transitions 0/201 dead transitions. [2024-06-14 13:35:34,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 201 transitions, 1971 flow [2024-06-14 13:35:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:35:34,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:35:34,143 INFO L175 Difference]: Start difference. First operand has 136 places, 170 transitions, 1414 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:35:34,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 201 transitions, 1971 flow [2024-06-14 13:35:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 201 transitions, 1911 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:34,249 INFO L231 Difference]: Finished difference. Result has 137 places, 172 transitions, 1501 flow [2024-06-14 13:35:34,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1501, PETRI_PLACES=137, PETRI_TRANSITIONS=172} [2024-06-14 13:35:34,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-14 13:35:34,250 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 172 transitions, 1501 flow [2024-06-14 13:35:34,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:34,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:34,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:34,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:35:34,251 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)] === [2024-06-14 13:35:34,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:34,251 INFO L85 PathProgramCache]: Analyzing trace with hash 334919258, now seen corresponding path program 4 times [2024-06-14 13:35:34,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:34,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534687608] [2024-06-14 13:35:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:34,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:34,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534687608] [2024-06-14 13:35:34,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534687608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:34,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:34,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525022279] [2024-06-14 13:35:34,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:34,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:35,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:35,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 172 transitions, 1501 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:35,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:35,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:35,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:35,704 INFO L124 PetriNetUnfolderBase]: 1736/2697 cut-off events. [2024-06-14 13:35:35,705 INFO L125 PetriNetUnfolderBase]: For 102141/102141 co-relation queries the response was YES. [2024-06-14 13:35:35,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17788 conditions, 2697 events. 1736/2697 cut-off events. For 102141/102141 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13681 event pairs, 480 based on Foata normal form. 4/2696 useless extension candidates. Maximal degree in co-relation 17724. Up to 2437 conditions per place. [2024-06-14 13:35:35,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 43 changer transitions 0/201 dead transitions. [2024-06-14 13:35:35,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 201 transitions, 2054 flow [2024-06-14 13:35:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:35:35,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 13:35:35,731 INFO L175 Difference]: Start difference. First operand has 137 places, 172 transitions, 1501 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:35:35,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 201 transitions, 2054 flow [2024-06-14 13:35:35,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 201 transitions, 1925 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:35,899 INFO L231 Difference]: Finished difference. Result has 139 places, 174 transitions, 1521 flow [2024-06-14 13:35:35,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=139, PETRI_TRANSITIONS=174} [2024-06-14 13:35:35,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-14 13:35:35,901 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 174 transitions, 1521 flow [2024-06-14 13:35:35,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-14 13:35:35,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:35,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:35,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:35:35,902 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:35,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash -329922417, now seen corresponding path program 1 times [2024-06-14 13:35:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:35,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260214872] [2024-06-14 13:35:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:36,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260214872] [2024-06-14 13:35:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260214872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:36,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:36,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:36,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305465851] [2024-06-14 13:35:36,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:36,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:36,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:36,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:36,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:36,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 174 transitions, 1521 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:36,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:36,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:36,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:37,372 INFO L124 PetriNetUnfolderBase]: 1746/2719 cut-off events. [2024-06-14 13:35:37,372 INFO L125 PetriNetUnfolderBase]: For 106900/106900 co-relation queries the response was YES. [2024-06-14 13:35:37,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18028 conditions, 2719 events. 1746/2719 cut-off events. For 106900/106900 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13801 event pairs, 475 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 17963. Up to 2571 conditions per place. [2024-06-14 13:35:37,394 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 17 changer transitions 0/197 dead transitions. [2024-06-14 13:35:37,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 197 transitions, 2024 flow [2024-06-14 13:35:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:35:37,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 13:35:37,396 INFO L175 Difference]: Start difference. First operand has 139 places, 174 transitions, 1521 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:35:37,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 197 transitions, 2024 flow [2024-06-14 13:35:37,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 197 transitions, 1893 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:37,516 INFO L231 Difference]: Finished difference. Result has 141 places, 180 transitions, 1497 flow [2024-06-14 13:35:37,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1497, PETRI_PLACES=141, PETRI_TRANSITIONS=180} [2024-06-14 13:35:37,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 13:35:37,517 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 180 transitions, 1497 flow [2024-06-14 13:35:37,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:37,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:37,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:37,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:35:37,518 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:37,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:37,518 INFO L85 PathProgramCache]: Analyzing trace with hash -329802261, now seen corresponding path program 1 times [2024-06-14 13:35:37,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:37,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339897950] [2024-06-14 13:35:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:37,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:38,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:38,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339897950] [2024-06-14 13:35:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339897950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:38,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:38,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572831664] [2024-06-14 13:35:38,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:38,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:38,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:38,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 180 transitions, 1497 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:38,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:38,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:38,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:38,615 INFO L124 PetriNetUnfolderBase]: 1774/2756 cut-off events. [2024-06-14 13:35:38,615 INFO L125 PetriNetUnfolderBase]: For 112590/112590 co-relation queries the response was YES. [2024-06-14 13:35:38,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18694 conditions, 2756 events. 1774/2756 cut-off events. For 112590/112590 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13967 event pairs, 456 based on Foata normal form. 2/2755 useless extension candidates. Maximal degree in co-relation 18627. Up to 2555 conditions per place. [2024-06-14 13:35:38,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 164 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2024-06-14 13:35:38,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 204 transitions, 2135 flow [2024-06-14 13:35:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:35:38,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-14 13:35:38,640 INFO L175 Difference]: Start difference. First operand has 141 places, 180 transitions, 1497 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:35:38,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 204 transitions, 2135 flow [2024-06-14 13:35:38,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 204 transitions, 2085 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:38,753 INFO L231 Difference]: Finished difference. Result has 146 places, 188 transitions, 1654 flow [2024-06-14 13:35:38,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1654, PETRI_PLACES=146, PETRI_TRANSITIONS=188} [2024-06-14 13:35:38,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-14 13:35:38,753 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 188 transitions, 1654 flow [2024-06-14 13:35:38,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:38,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:38,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:35:38,754 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:38,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash -329802447, now seen corresponding path program 2 times [2024-06-14 13:35:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:38,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183213831] [2024-06-14 13:35:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:39,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:39,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183213831] [2024-06-14 13:35:39,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183213831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:39,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:39,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:39,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267219708] [2024-06-14 13:35:39,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:39,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:39,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:39,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:39,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:39,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:39,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 188 transitions, 1654 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:39,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:39,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:39,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:40,086 INFO L124 PetriNetUnfolderBase]: 1792/2785 cut-off events. [2024-06-14 13:35:40,086 INFO L125 PetriNetUnfolderBase]: For 121786/121786 co-relation queries the response was YES. [2024-06-14 13:35:40,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19551 conditions, 2785 events. 1792/2785 cut-off events. For 121786/121786 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14138 event pairs, 473 based on Foata normal form. 2/2786 useless extension candidates. Maximal degree in co-relation 19482. Up to 2622 conditions per place. [2024-06-14 13:35:40,110 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 24 changer transitions 0/210 dead transitions. [2024-06-14 13:35:40,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 210 transitions, 2292 flow [2024-06-14 13:35:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:35:40,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-14 13:35:40,112 INFO L175 Difference]: Start difference. First operand has 146 places, 188 transitions, 1654 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:35:40,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 210 transitions, 2292 flow [2024-06-14 13:35:40,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 210 transitions, 2197 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:40,246 INFO L231 Difference]: Finished difference. Result has 150 places, 194 transitions, 1715 flow [2024-06-14 13:35:40,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1715, PETRI_PLACES=150, PETRI_TRANSITIONS=194} [2024-06-14 13:35:40,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 13:35:40,247 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 194 transitions, 1715 flow [2024-06-14 13:35:40,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:40,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:40,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:40,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:35:40,248 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:40,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1560558301, now seen corresponding path program 2 times [2024-06-14 13:35:40,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:40,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416241590] [2024-06-14 13:35:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:40,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:40,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:40,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416241590] [2024-06-14 13:35:40,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416241590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:40,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:40,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:40,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865221060] [2024-06-14 13:35:40,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:40,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:40,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:40,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:40,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 194 transitions, 1715 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:40,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:40,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:40,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:41,354 INFO L124 PetriNetUnfolderBase]: 1810/2806 cut-off events. [2024-06-14 13:35:41,354 INFO L125 PetriNetUnfolderBase]: For 129801/129805 co-relation queries the response was YES. [2024-06-14 13:35:41,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20119 conditions, 2806 events. 1810/2806 cut-off events. For 129801/129805 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14230 event pairs, 467 based on Foata normal form. 6/2809 useless extension candidates. Maximal degree in co-relation 20048. Up to 2548 conditions per place. [2024-06-14 13:35:41,418 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 168 selfloop transitions, 53 changer transitions 0/226 dead transitions. [2024-06-14 13:35:41,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 226 transitions, 2591 flow [2024-06-14 13:35:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:35:41,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-14 13:35:41,420 INFO L175 Difference]: Start difference. First operand has 150 places, 194 transitions, 1715 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:35:41,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 226 transitions, 2591 flow [2024-06-14 13:35:41,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 226 transitions, 2529 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:41,584 INFO L231 Difference]: Finished difference. Result has 156 places, 211 transitions, 2059 flow [2024-06-14 13:35:41,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2059, PETRI_PLACES=156, PETRI_TRANSITIONS=211} [2024-06-14 13:35:41,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-14 13:35:41,585 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 211 transitions, 2059 flow [2024-06-14 13:35:41,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:41,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:41,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:41,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:35:41,586 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:41,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash -152670927, now seen corresponding path program 3 times [2024-06-14 13:35:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516152245] [2024-06-14 13:35:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:42,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516152245] [2024-06-14 13:35:42,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516152245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:42,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:42,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:42,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590211377] [2024-06-14 13:35:42,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:42,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:42,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:42,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:42,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:42,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:42,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 211 transitions, 2059 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:42,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:42,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:42,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:42,729 INFO L124 PetriNetUnfolderBase]: 1804/2806 cut-off events. [2024-06-14 13:35:42,729 INFO L125 PetriNetUnfolderBase]: For 137290/137292 co-relation queries the response was YES. [2024-06-14 13:35:42,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20742 conditions, 2806 events. 1804/2806 cut-off events. For 137290/137292 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14365 event pairs, 482 based on Foata normal form. 2/2807 useless extension candidates. Maximal degree in co-relation 20667. Up to 2627 conditions per place. [2024-06-14 13:35:42,754 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 31 changer transitions 0/227 dead transitions. [2024-06-14 13:35:42,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2683 flow [2024-06-14 13:35:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:35:42,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 13:35:42,756 INFO L175 Difference]: Start difference. First operand has 156 places, 211 transitions, 2059 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:35:42,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2683 flow [2024-06-14 13:35:42,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 227 transitions, 2568 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-14 13:35:42,883 INFO L231 Difference]: Finished difference. Result has 161 places, 214 transitions, 2076 flow [2024-06-14 13:35:42,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2076, PETRI_PLACES=161, PETRI_TRANSITIONS=214} [2024-06-14 13:35:42,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-14 13:35:42,884 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 214 transitions, 2076 flow [2024-06-14 13:35:42,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:42,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:42,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:42,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:35:42,884 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:42,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:42,885 INFO L85 PathProgramCache]: Analyzing trace with hash -152670741, now seen corresponding path program 3 times [2024-06-14 13:35:42,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:42,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90818820] [2024-06-14 13:35:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:43,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90818820] [2024-06-14 13:35:43,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90818820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:43,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:43,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:35:43,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421995034] [2024-06-14 13:35:43,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:43,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:35:43,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:35:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:35:43,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:43,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 214 transitions, 2076 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:43,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:43,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:43,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:44,106 INFO L124 PetriNetUnfolderBase]: 1800/2795 cut-off events. [2024-06-14 13:35:44,106 INFO L125 PetriNetUnfolderBase]: For 140619/140623 co-relation queries the response was YES. [2024-06-14 13:35:44,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20709 conditions, 2795 events. 1800/2795 cut-off events. For 140619/140623 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14247 event pairs, 466 based on Foata normal form. 6/2798 useless extension candidates. Maximal degree in co-relation 20632. Up to 2538 conditions per place. [2024-06-14 13:35:44,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 50 changer transitions 0/231 dead transitions. [2024-06-14 13:35:44,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 231 transitions, 2766 flow [2024-06-14 13:35:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:35:44,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-14 13:35:44,133 INFO L175 Difference]: Start difference. First operand has 161 places, 214 transitions, 2076 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:35:44,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 231 transitions, 2766 flow [2024-06-14 13:35:44,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 231 transitions, 2618 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:44,287 INFO L231 Difference]: Finished difference. Result has 164 places, 218 transitions, 2098 flow [2024-06-14 13:35:44,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2098, PETRI_PLACES=164, PETRI_TRANSITIONS=218} [2024-06-14 13:35:44,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-14 13:35:44,288 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 218 transitions, 2098 flow [2024-06-14 13:35:44,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:35:44,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:44,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:44,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:35:44,289 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:44,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:44,289 INFO L85 PathProgramCache]: Analyzing trace with hash -152424663, now seen corresponding path program 1 times [2024-06-14 13:35:44,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:44,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435992465] [2024-06-14 13:35:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:44,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:45,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435992465] [2024-06-14 13:35:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435992465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:45,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:45,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:45,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557584487] [2024-06-14 13:35:45,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:45,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:45,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:45,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:35:45,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 218 transitions, 2098 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:45,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:45,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:35:45,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:45,832 INFO L124 PetriNetUnfolderBase]: 1698/2690 cut-off events. [2024-06-14 13:35:45,833 INFO L125 PetriNetUnfolderBase]: For 151866/151890 co-relation queries the response was YES. [2024-06-14 13:35:45,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19976 conditions, 2690 events. 1698/2690 cut-off events. For 151866/151890 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13816 event pairs, 454 based on Foata normal form. 12/2672 useless extension candidates. Maximal degree in co-relation 19897. Up to 2333 conditions per place. [2024-06-14 13:35:45,857 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 40 changer transitions 0/236 dead transitions. [2024-06-14 13:35:45,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 236 transitions, 2616 flow [2024-06-14 13:35:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:35:45,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:35:45,859 INFO L175 Difference]: Start difference. First operand has 164 places, 218 transitions, 2098 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:35:45,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 236 transitions, 2616 flow [2024-06-14 13:35:46,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 236 transitions, 2534 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:35:46,035 INFO L231 Difference]: Finished difference. Result has 169 places, 220 transitions, 2150 flow [2024-06-14 13:35:46,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2150, PETRI_PLACES=169, PETRI_TRANSITIONS=220} [2024-06-14 13:35:46,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 13:35:46,036 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 220 transitions, 2150 flow [2024-06-14 13:35:46,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:46,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:46,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:46,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:35:46,036 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)] === [2024-06-14 13:35:46,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 959921467, now seen corresponding path program 1 times [2024-06-14 13:35:46,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:46,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038994930] [2024-06-14 13:35:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:46,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:46,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:46,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038994930] [2024-06-14 13:35:46,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038994930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:46,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:46,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:46,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043294812] [2024-06-14 13:35:46,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:46,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:46,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:46,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:46,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:46,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 220 transitions, 2150 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:46,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:46,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:46,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:47,738 INFO L124 PetriNetUnfolderBase]: 2000/3125 cut-off events. [2024-06-14 13:35:47,739 INFO L125 PetriNetUnfolderBase]: For 181048/181048 co-relation queries the response was YES. [2024-06-14 13:35:47,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23652 conditions, 3125 events. 2000/3125 cut-off events. For 181048/181048 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16561 event pairs, 391 based on Foata normal form. 16/3140 useless extension candidates. Maximal degree in co-relation 23572. Up to 2519 conditions per place. [2024-06-14 13:35:47,767 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 39 changer transitions 0/271 dead transitions. [2024-06-14 13:35:47,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 271 transitions, 3104 flow [2024-06-14 13:35:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:35:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:35:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 13:35:47,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-14 13:35:47,769 INFO L175 Difference]: Start difference. First operand has 169 places, 220 transitions, 2150 flow. Second operand 10 states and 188 transitions. [2024-06-14 13:35:47,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 271 transitions, 3104 flow [2024-06-14 13:35:48,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 271 transitions, 2998 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:48,024 INFO L231 Difference]: Finished difference. Result has 173 places, 222 transitions, 2202 flow [2024-06-14 13:35:48,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2202, PETRI_PLACES=173, PETRI_TRANSITIONS=222} [2024-06-14 13:35:48,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 13:35:48,025 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 222 transitions, 2202 flow [2024-06-14 13:35:48,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:48,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:48,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:48,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:35:48,026 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)] === [2024-06-14 13:35:48,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash -877118349, now seen corresponding path program 2 times [2024-06-14 13:35:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:48,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114789226] [2024-06-14 13:35:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:48,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:48,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114789226] [2024-06-14 13:35:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114789226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:48,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958882934] [2024-06-14 13:35:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:48,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:48,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:48,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 222 transitions, 2202 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:48,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:48,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:48,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:49,578 INFO L124 PetriNetUnfolderBase]: 2058/3229 cut-off events. [2024-06-14 13:35:49,579 INFO L125 PetriNetUnfolderBase]: For 189309/189309 co-relation queries the response was YES. [2024-06-14 13:35:49,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24443 conditions, 3229 events. 2058/3229 cut-off events. For 189309/189309 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17252 event pairs, 511 based on Foata normal form. 16/3244 useless extension candidates. Maximal degree in co-relation 24362. Up to 2686 conditions per place. [2024-06-14 13:35:49,609 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 226 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-14 13:35:49,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 267 transitions, 3100 flow [2024-06-14 13:35:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:35:49,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 13:35:49,610 INFO L175 Difference]: Start difference. First operand has 173 places, 222 transitions, 2202 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:35:49,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 267 transitions, 3100 flow [2024-06-14 13:35:49,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 267 transitions, 3023 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:49,855 INFO L231 Difference]: Finished difference. Result has 176 places, 223 transitions, 2241 flow [2024-06-14 13:35:49,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2241, PETRI_PLACES=176, PETRI_TRANSITIONS=223} [2024-06-14 13:35:49,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 13:35:49,856 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 223 transitions, 2241 flow [2024-06-14 13:35:49,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:49,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:49,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:49,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:35:49,856 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)] === [2024-06-14 13:35:49,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:49,857 INFO L85 PathProgramCache]: Analyzing trace with hash -876970479, now seen corresponding path program 3 times [2024-06-14 13:35:49,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:49,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035533385] [2024-06-14 13:35:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:49,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:50,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035533385] [2024-06-14 13:35:50,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035533385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:50,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:50,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:50,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055877991] [2024-06-14 13:35:50,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:50,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:50,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:50,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:50,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:50,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:50,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 223 transitions, 2241 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:50,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:50,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:50,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:51,272 INFO L124 PetriNetUnfolderBase]: 2022/3171 cut-off events. [2024-06-14 13:35:51,272 INFO L125 PetriNetUnfolderBase]: For 185668/185668 co-relation queries the response was YES. [2024-06-14 13:35:51,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23408 conditions, 3171 events. 2022/3171 cut-off events. For 185668/185668 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16850 event pairs, 507 based on Foata normal form. 20/3190 useless extension candidates. Maximal degree in co-relation 23325. Up to 2794 conditions per place. [2024-06-14 13:35:51,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 35 changer transitions 0/262 dead transitions. [2024-06-14 13:35:51,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 262 transitions, 2926 flow [2024-06-14 13:35:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:35:51,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 13:35:51,304 INFO L175 Difference]: Start difference. First operand has 176 places, 223 transitions, 2241 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:35:51,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 262 transitions, 2926 flow [2024-06-14 13:35:51,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 262 transitions, 2812 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:51,619 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2208 flow [2024-06-14 13:35:51,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2208, PETRI_PLACES=178, PETRI_TRANSITIONS=223} [2024-06-14 13:35:51,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 13:35:51,619 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2208 flow [2024-06-14 13:35:51,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:51,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:51,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:51,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:35:51,620 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)] === [2024-06-14 13:35:51,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash 202601655, now seen corresponding path program 4 times [2024-06-14 13:35:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:51,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284430101] [2024-06-14 13:35:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:52,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:52,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284430101] [2024-06-14 13:35:52,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284430101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:52,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:52,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:52,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103132746] [2024-06-14 13:35:52,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:52,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:52,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:52,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:52,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 223 transitions, 2208 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:52,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:52,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:52,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:53,388 INFO L124 PetriNetUnfolderBase]: 2097/3306 cut-off events. [2024-06-14 13:35:53,388 INFO L125 PetriNetUnfolderBase]: For 192425/192427 co-relation queries the response was YES. [2024-06-14 13:35:53,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24016 conditions, 3306 events. 2097/3306 cut-off events. For 192425/192427 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17828 event pairs, 470 based on Foata normal form. 20/3325 useless extension candidates. Maximal degree in co-relation 23932. Up to 2619 conditions per place. [2024-06-14 13:35:53,433 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 176 selfloop transitions, 83 changer transitions 0/264 dead transitions. [2024-06-14 13:35:53,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 264 transitions, 2943 flow [2024-06-14 13:35:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:35:53,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-14 13:35:53,435 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2208 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:35:53,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 264 transitions, 2943 flow [2024-06-14 13:35:53,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 264 transitions, 2866 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:35:53,850 INFO L231 Difference]: Finished difference. Result has 179 places, 224 transitions, 2344 flow [2024-06-14 13:35:53,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2344, PETRI_PLACES=179, PETRI_TRANSITIONS=224} [2024-06-14 13:35:53,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-14 13:35:53,850 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 224 transitions, 2344 flow [2024-06-14 13:35:53,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:53,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:53,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:53,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:35:53,851 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)] === [2024-06-14 13:35:53,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 129282255, now seen corresponding path program 5 times [2024-06-14 13:35:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:53,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346640763] [2024-06-14 13:35:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:54,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:54,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346640763] [2024-06-14 13:35:54,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346640763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:54,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:54,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:54,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804770668] [2024-06-14 13:35:54,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:54,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:54,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:54,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:54,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 224 transitions, 2344 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:54,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:54,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:54,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:55,662 INFO L124 PetriNetUnfolderBase]: 2172/3435 cut-off events. [2024-06-14 13:35:55,663 INFO L125 PetriNetUnfolderBase]: For 205065/205067 co-relation queries the response was YES. [2024-06-14 13:35:55,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25235 conditions, 3435 events. 2172/3435 cut-off events. For 205065/205067 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18775 event pairs, 506 based on Foata normal form. 20/3454 useless extension candidates. Maximal degree in co-relation 25150. Up to 2744 conditions per place. [2024-06-14 13:35:55,712 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 82 changer transitions 0/264 dead transitions. [2024-06-14 13:35:55,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 264 transitions, 3074 flow [2024-06-14 13:35:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:35:55,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 13:35:55,714 INFO L175 Difference]: Start difference. First operand has 179 places, 224 transitions, 2344 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:35:55,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 264 transitions, 3074 flow [2024-06-14 13:35:56,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 264 transitions, 2887 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:56,068 INFO L231 Difference]: Finished difference. Result has 181 places, 225 transitions, 2370 flow [2024-06-14 13:35:56,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2370, PETRI_PLACES=181, PETRI_TRANSITIONS=225} [2024-06-14 13:35:56,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-14 13:35:56,069 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 225 transitions, 2370 flow [2024-06-14 13:35:56,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:56,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:56,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:35:56,069 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)] === [2024-06-14 13:35:56,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash 3151995, now seen corresponding path program 6 times [2024-06-14 13:35:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141642426] [2024-06-14 13:35:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:56,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:56,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141642426] [2024-06-14 13:35:56,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141642426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:56,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:56,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:56,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628841844] [2024-06-14 13:35:56,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:56,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:56,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:56,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:56,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 225 transitions, 2370 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:56,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:56,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:56,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:57,698 INFO L124 PetriNetUnfolderBase]: 2230/3522 cut-off events. [2024-06-14 13:35:57,698 INFO L125 PetriNetUnfolderBase]: For 210675/210677 co-relation queries the response was YES. [2024-06-14 13:35:57,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25823 conditions, 3522 events. 2230/3522 cut-off events. For 210675/210677 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19281 event pairs, 500 based on Foata normal form. 16/3537 useless extension candidates. Maximal degree in co-relation 25737. Up to 2612 conditions per place. [2024-06-14 13:35:57,731 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 178 selfloop transitions, 85 changer transitions 0/268 dead transitions. [2024-06-14 13:35:57,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 268 transitions, 3128 flow [2024-06-14 13:35:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 13:35:57,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-14 13:35:57,733 INFO L175 Difference]: Start difference. First operand has 181 places, 225 transitions, 2370 flow. Second operand 9 states and 176 transitions. [2024-06-14 13:35:57,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 268 transitions, 3128 flow [2024-06-14 13:35:58,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 268 transitions, 2941 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:58,056 INFO L231 Difference]: Finished difference. Result has 183 places, 226 transitions, 2403 flow [2024-06-14 13:35:58,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=183, PETRI_TRANSITIONS=226} [2024-06-14 13:35:58,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-14 13:35:58,056 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 226 transitions, 2403 flow [2024-06-14 13:35:58,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:58,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:58,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:58,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:35:58,057 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)] === [2024-06-14 13:35:58,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:58,057 INFO L85 PathProgramCache]: Analyzing trace with hash 210226167, now seen corresponding path program 1 times [2024-06-14 13:35:58,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:58,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043197719] [2024-06-14 13:35:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:58,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:59,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:59,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043197719] [2024-06-14 13:35:59,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043197719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:59,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:59,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:35:59,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530496037] [2024-06-14 13:35:59,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:59,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:35:59,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:35:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:35:59,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:35:59,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 226 transitions, 2403 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:59,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:59,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:35:59,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:59,933 INFO L124 PetriNetUnfolderBase]: 2271/3600 cut-off events. [2024-06-14 13:35:59,934 INFO L125 PetriNetUnfolderBase]: For 215684/215686 co-relation queries the response was YES. [2024-06-14 13:35:59,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26321 conditions, 3600 events. 2271/3600 cut-off events. For 215684/215686 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20059 event pairs, 496 based on Foata normal form. 12/3611 useless extension candidates. Maximal degree in co-relation 26234. Up to 2554 conditions per place. [2024-06-14 13:35:59,967 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 179 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-14 13:35:59,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 269 transitions, 3168 flow [2024-06-14 13:35:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:35:59,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-14 13:35:59,968 INFO L175 Difference]: Start difference. First operand has 183 places, 226 transitions, 2403 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:35:59,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 269 transitions, 3168 flow [2024-06-14 13:36:00,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 269 transitions, 2966 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:00,357 INFO L231 Difference]: Finished difference. Result has 185 places, 227 transitions, 2423 flow [2024-06-14 13:36:00,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2423, PETRI_PLACES=185, PETRI_TRANSITIONS=227} [2024-06-14 13:36:00,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-14 13:36:00,358 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 227 transitions, 2423 flow [2024-06-14 13:36:00,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:00,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:00,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:00,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:36:00,359 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:00,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:00,359 INFO L85 PathProgramCache]: Analyzing trace with hash 537348623, now seen corresponding path program 1 times [2024-06-14 13:36:00,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:00,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289002238] [2024-06-14 13:36:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:00,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:00,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:00,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289002238] [2024-06-14 13:36:00,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289002238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:00,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:00,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:00,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091639318] [2024-06-14 13:36:00,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:00,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:00,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:00,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:00,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:00,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 227 transitions, 2423 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:00,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:00,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:00,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:01,582 INFO L124 PetriNetUnfolderBase]: 2276/3601 cut-off events. [2024-06-14 13:36:01,583 INFO L125 PetriNetUnfolderBase]: For 209791/209795 co-relation queries the response was YES. [2024-06-14 13:36:01,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26330 conditions, 3601 events. 2276/3601 cut-off events. For 209791/209795 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19899 event pairs, 599 based on Foata normal form. 5/3605 useless extension candidates. Maximal degree in co-relation 26242. Up to 3409 conditions per place. [2024-06-14 13:36:01,622 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 29 changer transitions 0/250 dead transitions. [2024-06-14 13:36:01,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 250 transitions, 3047 flow [2024-06-14 13:36:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:36:01,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 13:36:01,624 INFO L175 Difference]: Start difference. First operand has 185 places, 227 transitions, 2423 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:36:01,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 250 transitions, 3047 flow [2024-06-14 13:36:02,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 250 transitions, 2845 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:02,164 INFO L231 Difference]: Finished difference. Result has 185 places, 230 transitions, 2347 flow [2024-06-14 13:36:02,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2347, PETRI_PLACES=185, PETRI_TRANSITIONS=230} [2024-06-14 13:36:02,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-14 13:36:02,165 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 230 transitions, 2347 flow [2024-06-14 13:36:02,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:02,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:02,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:02,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:36:02,165 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:02,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:02,166 INFO L85 PathProgramCache]: Analyzing trace with hash 543062543, now seen corresponding path program 2 times [2024-06-14 13:36:02,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:02,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809042335] [2024-06-14 13:36:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:02,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:02,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:02,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809042335] [2024-06-14 13:36:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809042335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:02,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:02,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:02,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261211700] [2024-06-14 13:36:02,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:02,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:02,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:02,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:02,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:02,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:02,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 230 transitions, 2347 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:02,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:02,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:02,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:03,563 INFO L124 PetriNetUnfolderBase]: 2289/3632 cut-off events. [2024-06-14 13:36:03,564 INFO L125 PetriNetUnfolderBase]: For 215528/215532 co-relation queries the response was YES. [2024-06-14 13:36:03,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26199 conditions, 3632 events. 2289/3632 cut-off events. For 215528/215532 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20205 event pairs, 592 based on Foata normal form. 5/3636 useless extension candidates. Maximal degree in co-relation 26110. Up to 3413 conditions per place. [2024-06-14 13:36:03,599 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 36 changer transitions 0/254 dead transitions. [2024-06-14 13:36:03,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 254 transitions, 3125 flow [2024-06-14 13:36:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:36:03,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-14 13:36:03,601 INFO L175 Difference]: Start difference. First operand has 185 places, 230 transitions, 2347 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:36:03,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 254 transitions, 3125 flow [2024-06-14 13:36:04,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 254 transitions, 3049 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:36:04,050 INFO L231 Difference]: Finished difference. Result has 188 places, 237 transitions, 2497 flow [2024-06-14 13:36:04,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2497, PETRI_PLACES=188, PETRI_TRANSITIONS=237} [2024-06-14 13:36:04,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-14 13:36:04,051 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 237 transitions, 2497 flow [2024-06-14 13:36:04,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:04,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:04,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:04,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:36:04,051 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)] === [2024-06-14 13:36:04,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -303966141, now seen corresponding path program 7 times [2024-06-14 13:36:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:04,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010211885] [2024-06-14 13:36:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:04,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:04,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:04,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010211885] [2024-06-14 13:36:04,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010211885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:04,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:04,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:04,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491666022] [2024-06-14 13:36:04,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:04,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:04,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:04,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:04,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:04,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:04,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 237 transitions, 2497 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:04,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:04,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:04,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:05,583 INFO L124 PetriNetUnfolderBase]: 2364/3759 cut-off events. [2024-06-14 13:36:05,583 INFO L125 PetriNetUnfolderBase]: For 245705/245705 co-relation queries the response was YES. [2024-06-14 13:36:05,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27278 conditions, 3759 events. 2364/3759 cut-off events. For 245705/245705 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21069 event pairs, 528 based on Foata normal form. 20/3774 useless extension candidates. Maximal degree in co-relation 27187. Up to 3063 conditions per place. [2024-06-14 13:36:05,621 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 79 changer transitions 0/277 dead transitions. [2024-06-14 13:36:05,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 277 transitions, 3265 flow [2024-06-14 13:36:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:36:05,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-14 13:36:05,623 INFO L175 Difference]: Start difference. First operand has 188 places, 237 transitions, 2497 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:36:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 277 transitions, 3265 flow [2024-06-14 13:36:06,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 277 transitions, 3189 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:06,172 INFO L231 Difference]: Finished difference. Result has 193 places, 238 transitions, 2634 flow [2024-06-14 13:36:06,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2634, PETRI_PLACES=193, PETRI_TRANSITIONS=238} [2024-06-14 13:36:06,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-14 13:36:06,173 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 238 transitions, 2634 flow [2024-06-14 13:36:06,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:06,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:06,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:06,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:36:06,174 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:06,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:06,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1823569209, now seen corresponding path program 8 times [2024-06-14 13:36:06,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:06,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671378575] [2024-06-14 13:36:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:06,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671378575] [2024-06-14 13:36:06,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671378575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:06,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:06,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:06,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335898235] [2024-06-14 13:36:06,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:06,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:06,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:06,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:07,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:07,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 238 transitions, 2634 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:07,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:07,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:07,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:07,913 INFO L124 PetriNetUnfolderBase]: 2439/3876 cut-off events. [2024-06-14 13:36:07,913 INFO L125 PetriNetUnfolderBase]: For 261592/261592 co-relation queries the response was YES. [2024-06-14 13:36:07,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28615 conditions, 3876 events. 2439/3876 cut-off events. For 261592/261592 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21927 event pairs, 539 based on Foata normal form. 20/3891 useless extension candidates. Maximal degree in co-relation 28523. Up to 3188 conditions per place. [2024-06-14 13:36:07,952 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 82 changer transitions 0/276 dead transitions. [2024-06-14 13:36:07,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 276 transitions, 3388 flow [2024-06-14 13:36:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:36:07,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 13:36:07,954 INFO L175 Difference]: Start difference. First operand has 193 places, 238 transitions, 2634 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:36:07,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 276 transitions, 3388 flow [2024-06-14 13:36:08,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 276 transitions, 3201 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:08,329 INFO L231 Difference]: Finished difference. Result has 195 places, 239 transitions, 2668 flow [2024-06-14 13:36:08,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2668, PETRI_PLACES=195, PETRI_TRANSITIONS=239} [2024-06-14 13:36:08,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-14 13:36:08,329 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 239 transitions, 2668 flow [2024-06-14 13:36:08,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:08,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:08,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:08,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:36:08,330 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)] === [2024-06-14 13:36:08,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash -588097909, now seen corresponding path program 9 times [2024-06-14 13:36:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:08,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220389878] [2024-06-14 13:36:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:08,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:09,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:09,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220389878] [2024-06-14 13:36:09,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220389878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:09,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:09,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:09,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139507528] [2024-06-14 13:36:09,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:09,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:09,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:09,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:09,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 239 transitions, 2668 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:09,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:09,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:09,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:10,016 INFO L124 PetriNetUnfolderBase]: 2514/4001 cut-off events. [2024-06-14 13:36:10,016 INFO L125 PetriNetUnfolderBase]: For 272550/272550 co-relation queries the response was YES. [2024-06-14 13:36:10,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29448 conditions, 4001 events. 2514/4001 cut-off events. For 272550/272550 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22829 event pairs, 558 based on Foata normal form. 20/4016 useless extension candidates. Maximal degree in co-relation 29355. Up to 3313 conditions per place. [2024-06-14 13:36:10,057 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 84 changer transitions 0/278 dead transitions. [2024-06-14 13:36:10,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 278 transitions, 3435 flow [2024-06-14 13:36:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:36:10,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 13:36:10,059 INFO L175 Difference]: Start difference. First operand has 195 places, 239 transitions, 2668 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:36:10,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 278 transitions, 3435 flow [2024-06-14 13:36:10,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 278 transitions, 3240 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:10,443 INFO L231 Difference]: Finished difference. Result has 197 places, 240 transitions, 2700 flow [2024-06-14 13:36:10,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2700, PETRI_PLACES=197, PETRI_TRANSITIONS=240} [2024-06-14 13:36:10,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 13:36:10,444 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 240 transitions, 2700 flow [2024-06-14 13:36:10,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:10,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:10,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:10,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:36:10,444 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)] === [2024-06-14 13:36:10,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1922916475, now seen corresponding path program 10 times [2024-06-14 13:36:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:10,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456146240] [2024-06-14 13:36:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:11,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:11,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456146240] [2024-06-14 13:36:11,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456146240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:11,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:11,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399392486] [2024-06-14 13:36:11,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:11,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:11,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 240 transitions, 2700 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:11,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:11,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:11,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:12,138 INFO L124 PetriNetUnfolderBase]: 2522/4031 cut-off events. [2024-06-14 13:36:12,138 INFO L125 PetriNetUnfolderBase]: For 266736/266736 co-relation queries the response was YES. [2024-06-14 13:36:12,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29124 conditions, 4031 events. 2522/4031 cut-off events. For 266736/266736 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23154 event pairs, 550 based on Foata normal form. 16/4042 useless extension candidates. Maximal degree in co-relation 29030. Up to 2983 conditions per place. [2024-06-14 13:36:12,184 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 86 changer transitions 0/281 dead transitions. [2024-06-14 13:36:12,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 281 transitions, 3486 flow [2024-06-14 13:36:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:36:12,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 13:36:12,186 INFO L175 Difference]: Start difference. First operand has 197 places, 240 transitions, 2700 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:36:12,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 281 transitions, 3486 flow [2024-06-14 13:36:12,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 281 transitions, 3285 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:12,748 INFO L231 Difference]: Finished difference. Result has 199 places, 241 transitions, 2731 flow [2024-06-14 13:36:12,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2731, PETRI_PLACES=199, PETRI_TRANSITIONS=241} [2024-06-14 13:36:12,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-14 13:36:12,749 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 241 transitions, 2731 flow [2024-06-14 13:36:12,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:12,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:12,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:12,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:36:12,749 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)] === [2024-06-14 13:36:12,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:12,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2030639661, now seen corresponding path program 2 times [2024-06-14 13:36:12,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:12,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67434549] [2024-06-14 13:36:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:12,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:13,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:13,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67434549] [2024-06-14 13:36:13,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67434549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:13,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:13,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:13,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744521332] [2024-06-14 13:36:13,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:13,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:13,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:13,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:13,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 241 transitions, 2731 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:13,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:13,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:13,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:14,877 INFO L124 PetriNetUnfolderBase]: 2563/4105 cut-off events. [2024-06-14 13:36:14,878 INFO L125 PetriNetUnfolderBase]: For 270226/270226 co-relation queries the response was YES. [2024-06-14 13:36:14,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29564 conditions, 4105 events. 2563/4105 cut-off events. For 270226/270226 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23807 event pairs, 569 based on Foata normal form. 12/4112 useless extension candidates. Maximal degree in co-relation 29469. Up to 3194 conditions per place. [2024-06-14 13:36:14,912 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-14 13:36:14,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 283 transitions, 3533 flow [2024-06-14 13:36:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:36:14,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 13:36:14,914 INFO L175 Difference]: Start difference. First operand has 199 places, 241 transitions, 2731 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:36:14,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 283 transitions, 3533 flow [2024-06-14 13:36:15,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 283 transitions, 3319 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:15,398 INFO L231 Difference]: Finished difference. Result has 201 places, 242 transitions, 2741 flow [2024-06-14 13:36:15,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2741, PETRI_PLACES=201, PETRI_TRANSITIONS=242} [2024-06-14 13:36:15,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-14 13:36:15,399 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 242 transitions, 2741 flow [2024-06-14 13:36:15,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:15,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:15,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:36:15,400 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)] === [2024-06-14 13:36:15,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash -331122727, now seen corresponding path program 3 times [2024-06-14 13:36:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:15,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107415188] [2024-06-14 13:36:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:15,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:16,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:16,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107415188] [2024-06-14 13:36:16,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107415188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:16,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:16,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:16,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794410462] [2024-06-14 13:36:16,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:16,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:16,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:16,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:16,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 242 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:16,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:16,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:16,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:17,500 INFO L124 PetriNetUnfolderBase]: 2604/4188 cut-off events. [2024-06-14 13:36:17,501 INFO L125 PetriNetUnfolderBase]: For 278547/278547 co-relation queries the response was YES. [2024-06-14 13:36:17,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29923 conditions, 4188 events. 2604/4188 cut-off events. For 278547/278547 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24512 event pairs, 572 based on Foata normal form. 12/4195 useless extension candidates. Maximal degree in co-relation 29827. Up to 3385 conditions per place. [2024-06-14 13:36:17,542 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 194 selfloop transitions, 85 changer transitions 0/284 dead transitions. [2024-06-14 13:36:17,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 284 transitions, 3548 flow [2024-06-14 13:36:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:36:17,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 13:36:17,544 INFO L175 Difference]: Start difference. First operand has 201 places, 242 transitions, 2741 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:36:17,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 284 transitions, 3548 flow [2024-06-14 13:36:18,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 284 transitions, 3344 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:18,066 INFO L231 Difference]: Finished difference. Result has 203 places, 243 transitions, 2771 flow [2024-06-14 13:36:18,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2771, PETRI_PLACES=203, PETRI_TRANSITIONS=243} [2024-06-14 13:36:18,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 13:36:18,067 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 243 transitions, 2771 flow [2024-06-14 13:36:18,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:18,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:18,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:18,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:36:18,067 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)] === [2024-06-14 13:36:18,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash -18612789, now seen corresponding path program 4 times [2024-06-14 13:36:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:18,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140485137] [2024-06-14 13:36:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:18,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:19,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:19,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140485137] [2024-06-14 13:36:19,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140485137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:19,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:19,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:36:19,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706601997] [2024-06-14 13:36:19,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:19,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:36:19,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:36:19,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:36:19,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:19,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 243 transitions, 2771 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:19,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:19,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:19,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:20,025 INFO L124 PetriNetUnfolderBase]: 2584/4156 cut-off events. [2024-06-14 13:36:20,025 INFO L125 PetriNetUnfolderBase]: For 269541/269541 co-relation queries the response was YES. [2024-06-14 13:36:20,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29020 conditions, 4156 events. 2584/4156 cut-off events. For 269541/269541 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24351 event pairs, 508 based on Foata normal form. 12/4163 useless extension candidates. Maximal degree in co-relation 28923. Up to 2434 conditions per place. [2024-06-14 13:36:20,068 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 96 changer transitions 0/282 dead transitions. [2024-06-14 13:36:20,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 282 transitions, 3426 flow [2024-06-14 13:36:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:36:20,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 13:36:20,069 INFO L175 Difference]: Start difference. First operand has 203 places, 243 transitions, 2771 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:36:20,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 282 transitions, 3426 flow [2024-06-14 13:36:20,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 282 transitions, 3212 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:20,632 INFO L231 Difference]: Finished difference. Result has 204 places, 242 transitions, 2669 flow [2024-06-14 13:36:20,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2669, PETRI_PLACES=204, PETRI_TRANSITIONS=242} [2024-06-14 13:36:20,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-14 13:36:20,633 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 242 transitions, 2669 flow [2024-06-14 13:36:20,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:36:20,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:20,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:20,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:36:20,633 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:20,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:20,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1646329329, now seen corresponding path program 3 times [2024-06-14 13:36:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:20,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617784624] [2024-06-14 13:36:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:20,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:21,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:21,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617784624] [2024-06-14 13:36:21,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617784624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:21,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:21,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:21,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546729443] [2024-06-14 13:36:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:21,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:21,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:21,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 242 transitions, 2669 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:21,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:21,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:21,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:21,930 INFO L124 PetriNetUnfolderBase]: 2581/4160 cut-off events. [2024-06-14 13:36:21,930 INFO L125 PetriNetUnfolderBase]: For 260112/260112 co-relation queries the response was YES. [2024-06-14 13:36:21,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28970 conditions, 4160 events. 2581/4160 cut-off events. For 260112/260112 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24365 event pairs, 665 based on Foata normal form. 1/4158 useless extension candidates. Maximal degree in co-relation 28872. Up to 3930 conditions per place. [2024-06-14 13:36:21,972 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 226 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-06-14 13:36:21,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 260 transitions, 3251 flow [2024-06-14 13:36:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:36:21,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 13:36:21,973 INFO L175 Difference]: Start difference. First operand has 204 places, 242 transitions, 2669 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:36:21,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 260 transitions, 3251 flow [2024-06-14 13:36:22,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 260 transitions, 2964 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 13:36:22,641 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 2447 flow [2024-06-14 13:36:22,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2447, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-14 13:36:22,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 13:36:22,642 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 2447 flow [2024-06-14 13:36:22,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:22,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:22,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:22,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:36:22,643 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:22,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1633949169, now seen corresponding path program 4 times [2024-06-14 13:36:22,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:22,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425707914] [2024-06-14 13:36:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:22,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:23,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:23,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425707914] [2024-06-14 13:36:23,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425707914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:23,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:23,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693335285] [2024-06-14 13:36:23,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:23,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:23,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:23,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 2447 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:23,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:23,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:23,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:24,111 INFO L124 PetriNetUnfolderBase]: 2573/4147 cut-off events. [2024-06-14 13:36:24,111 INFO L125 PetriNetUnfolderBase]: For 260508/260508 co-relation queries the response was YES. [2024-06-14 13:36:24,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28029 conditions, 4147 events. 2573/4147 cut-off events. For 260508/260508 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24238 event pairs, 663 based on Foata normal form. 2/4146 useless extension candidates. Maximal degree in co-relation 27931. Up to 3893 conditions per place. [2024-06-14 13:36:24,152 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 39 changer transitions 0/257 dead transitions. [2024-06-14 13:36:24,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 257 transitions, 3011 flow [2024-06-14 13:36:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:36:24,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 13:36:24,154 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 2447 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:36:24,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 257 transitions, 3011 flow [2024-06-14 13:36:24,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 257 transitions, 2903 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:24,772 INFO L231 Difference]: Finished difference. Result has 204 places, 242 transitions, 2425 flow [2024-06-14 13:36:24,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2425, PETRI_PLACES=204, PETRI_TRANSITIONS=242} [2024-06-14 13:36:24,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-14 13:36:24,773 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 242 transitions, 2425 flow [2024-06-14 13:36:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:24,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:24,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:24,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:36:24,774 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:24,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1118815005, now seen corresponding path program 5 times [2024-06-14 13:36:24,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:24,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709658535] [2024-06-14 13:36:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:24,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:25,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709658535] [2024-06-14 13:36:25,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709658535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:25,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:25,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:25,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855176234] [2024-06-14 13:36:25,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:25,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:25,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:25,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:25,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:25,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:25,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 242 transitions, 2425 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:25,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:25,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:25,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:26,091 INFO L124 PetriNetUnfolderBase]: 2583/4161 cut-off events. [2024-06-14 13:36:26,091 INFO L125 PetriNetUnfolderBase]: For 268081/268085 co-relation queries the response was YES. [2024-06-14 13:36:26,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28038 conditions, 4161 events. 2583/4161 cut-off events. For 268081/268085 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24326 event pairs, 676 based on Foata normal form. 6/4164 useless extension candidates. Maximal degree in co-relation 27940. Up to 3846 conditions per place. [2024-06-14 13:36:26,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 61 changer transitions 0/258 dead transitions. [2024-06-14 13:36:26,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 258 transitions, 3150 flow [2024-06-14 13:36:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:36:26,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 13:36:26,133 INFO L175 Difference]: Start difference. First operand has 204 places, 242 transitions, 2425 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:36:26,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 258 transitions, 3150 flow [2024-06-14 13:36:26,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 258 transitions, 3043 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:26,808 INFO L231 Difference]: Finished difference. Result has 205 places, 246 transitions, 2508 flow [2024-06-14 13:36:26,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2508, PETRI_PLACES=205, PETRI_TRANSITIONS=246} [2024-06-14 13:36:26,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-14 13:36:26,809 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 246 transitions, 2508 flow [2024-06-14 13:36:26,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:26,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:26,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:26,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:36:26,810 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:26,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash -444505585, now seen corresponding path program 6 times [2024-06-14 13:36:26,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307807462] [2024-06-14 13:36:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:26,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:27,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:27,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307807462] [2024-06-14 13:36:27,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307807462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:27,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:27,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:27,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598771933] [2024-06-14 13:36:27,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:27,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:27,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:27,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:27,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:27,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 246 transitions, 2508 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:27,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:27,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:27,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:28,171 INFO L124 PetriNetUnfolderBase]: 2575/4150 cut-off events. [2024-06-14 13:36:28,171 INFO L125 PetriNetUnfolderBase]: For 272737/272741 co-relation queries the response was YES. [2024-06-14 13:36:28,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28023 conditions, 4150 events. 2575/4150 cut-off events. For 272737/272741 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24313 event pairs, 676 based on Foata normal form. 6/4153 useless extension candidates. Maximal degree in co-relation 27924. Up to 3838 conditions per place. [2024-06-14 13:36:28,206 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 187 selfloop transitions, 65 changer transitions 0/257 dead transitions. [2024-06-14 13:36:28,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 257 transitions, 3052 flow [2024-06-14 13:36:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:36:28,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 13:36:28,208 INFO L175 Difference]: Start difference. First operand has 205 places, 246 transitions, 2508 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:36:28,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 257 transitions, 3052 flow [2024-06-14 13:36:28,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 257 transitions, 2907 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:28,861 INFO L231 Difference]: Finished difference. Result has 208 places, 246 transitions, 2500 flow [2024-06-14 13:36:28,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2500, PETRI_PLACES=208, PETRI_TRANSITIONS=246} [2024-06-14 13:36:28,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-14 13:36:28,862 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 246 transitions, 2500 flow [2024-06-14 13:36:28,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2024-06-14 13:36:28,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:28,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:28,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:36:28,863 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:28,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -430212849, now seen corresponding path program 1 times [2024-06-14 13:36:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:28,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359971598] [2024-06-14 13:36:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:29,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:29,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359971598] [2024-06-14 13:36:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359971598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:29,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:29,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913659495] [2024-06-14 13:36:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:29,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:29,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:29,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:29,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 246 transitions, 2500 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-06-14 13:36:29,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:29,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:29,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:30,266 INFO L124 PetriNetUnfolderBase]: 2438/3967 cut-off events. [2024-06-14 13:36:30,266 INFO L125 PetriNetUnfolderBase]: For 283797/283821 co-relation queries the response was YES. [2024-06-14 13:36:30,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27308 conditions, 3967 events. 2438/3967 cut-off events. For 283797/283821 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23352 event pairs, 629 based on Foata normal form. 2/3921 useless extension candidates. Maximal degree in co-relation 27208. Up to 3593 conditions per place. [2024-06-14 13:36:30,303 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 38 changer transitions 0/264 dead transitions. [2024-06-14 13:36:30,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 264 transitions, 3190 flow [2024-06-14 13:36:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:36:30,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-14 13:36:30,305 INFO L175 Difference]: Start difference. First operand has 208 places, 246 transitions, 2500 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:36:30,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 264 transitions, 3190 flow [2024-06-14 13:36:30,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 264 transitions, 2969 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 13:36:30,776 INFO L231 Difference]: Finished difference. Result has 207 places, 252 transitions, 2435 flow [2024-06-14 13:36:30,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2435, PETRI_PLACES=207, PETRI_TRANSITIONS=252} [2024-06-14 13:36:30,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-14 13:36:30,776 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 252 transitions, 2435 flow [2024-06-14 13:36:30,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-06-14 13:36:30,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:30,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:30,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:36:30,777 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:30,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash -430688079, now seen corresponding path program 2 times [2024-06-14 13:36:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:30,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283716875] [2024-06-14 13:36:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:30,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:31,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:31,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283716875] [2024-06-14 13:36:31,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283716875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:31,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:31,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:36:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137430829] [2024-06-14 13:36:31,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:31,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:36:31,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:36:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:36:31,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:36:31,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 252 transitions, 2435 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-06-14 13:36:31,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:31,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:36:31,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:32,428 INFO L124 PetriNetUnfolderBase]: 2432/3959 cut-off events. [2024-06-14 13:36:32,428 INFO L125 PetriNetUnfolderBase]: For 290420/290454 co-relation queries the response was YES. [2024-06-14 13:36:32,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27460 conditions, 3959 events. 2432/3959 cut-off events. For 290420/290454 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23335 event pairs, 629 based on Foata normal form. 2/3913 useless extension candidates. Maximal degree in co-relation 27360. Up to 3600 conditions per place. [2024-06-14 13:36:32,468 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 35 changer transitions 0/263 dead transitions. [2024-06-14 13:36:32,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 263 transitions, 2929 flow [2024-06-14 13:36:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:36:32,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-14 13:36:32,469 INFO L175 Difference]: Start difference. First operand has 207 places, 252 transitions, 2435 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:36:32,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 263 transitions, 2929 flow [2024-06-14 13:36:33,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 263 transitions, 2845 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:33,068 INFO L231 Difference]: Finished difference. Result has 211 places, 252 transitions, 2428 flow [2024-06-14 13:36:33,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2428, PETRI_PLACES=211, PETRI_TRANSITIONS=252} [2024-06-14 13:36:33,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-14 13:36:33,069 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 252 transitions, 2428 flow [2024-06-14 13:36:33,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-06-14 13:36:33,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:33,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:36:33,070 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:33,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1637749521, now seen corresponding path program 1 times [2024-06-14 13:36:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:33,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902615506] [2024-06-14 13:36:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:33,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902615506] [2024-06-14 13:36:33,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902615506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:33,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:33,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:33,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012116769] [2024-06-14 13:36:33,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:33,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:33,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:33,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:33,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:33,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:33,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 252 transitions, 2428 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:33,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:33,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:33,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:34,697 INFO L124 PetriNetUnfolderBase]: 2576/4156 cut-off events. [2024-06-14 13:36:34,698 INFO L125 PetriNetUnfolderBase]: For 290463/290463 co-relation queries the response was YES. [2024-06-14 13:36:34,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28411 conditions, 4156 events. 2576/4156 cut-off events. For 290463/290463 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24355 event pairs, 675 based on Foata normal form. 1/4156 useless extension candidates. Maximal degree in co-relation 28309. Up to 3953 conditions per place. [2024-06-14 13:36:34,744 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 21 changer transitions 0/270 dead transitions. [2024-06-14 13:36:34,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 270 transitions, 3033 flow [2024-06-14 13:36:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:36:34,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 13:36:34,745 INFO L175 Difference]: Start difference. First operand has 211 places, 252 transitions, 2428 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:36:34,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 270 transitions, 3033 flow [2024-06-14 13:36:35,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 270 transitions, 2927 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:35,391 INFO L231 Difference]: Finished difference. Result has 214 places, 254 transitions, 2394 flow [2024-06-14 13:36:35,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2394, PETRI_PLACES=214, PETRI_TRANSITIONS=254} [2024-06-14 13:36:35,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-14 13:36:35,392 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 254 transitions, 2394 flow [2024-06-14 13:36:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:35,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:35,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:35,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:36:35,393 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:35,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1637659156, now seen corresponding path program 1 times [2024-06-14 13:36:35,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:35,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640866775] [2024-06-14 13:36:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:35,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:36,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:36,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640866775] [2024-06-14 13:36:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640866775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:36,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:36,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:36,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352348239] [2024-06-14 13:36:36,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:36,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:36,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:36,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:36,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 254 transitions, 2394 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:36,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:36,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:36,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:36,890 INFO L124 PetriNetUnfolderBase]: 2632/4235 cut-off events. [2024-06-14 13:36:36,890 INFO L125 PetriNetUnfolderBase]: For 312550/312550 co-relation queries the response was YES. [2024-06-14 13:36:36,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29215 conditions, 4235 events. 2632/4235 cut-off events. For 312550/312550 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24844 event pairs, 615 based on Foata normal form. 4/4237 useless extension candidates. Maximal degree in co-relation 29111. Up to 3824 conditions per place. [2024-06-14 13:36:36,947 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 218 selfloop transitions, 75 changer transitions 0/298 dead transitions. [2024-06-14 13:36:36,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 298 transitions, 3441 flow [2024-06-14 13:36:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:36:36,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:36:36,949 INFO L175 Difference]: Start difference. First operand has 214 places, 254 transitions, 2394 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:36:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 298 transitions, 3441 flow [2024-06-14 13:36:37,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 298 transitions, 3387 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:37,622 INFO L231 Difference]: Finished difference. Result has 218 places, 277 transitions, 2797 flow [2024-06-14 13:36:37,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2797, PETRI_PLACES=218, PETRI_TRANSITIONS=277} [2024-06-14 13:36:37,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 13:36:37,623 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 277 transitions, 2797 flow [2024-06-14 13:36:37,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:37,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:37,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:37,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:36:37,623 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)] === [2024-06-14 13:36:37,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1436203166, now seen corresponding path program 2 times [2024-06-14 13:36:37,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:37,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23928876] [2024-06-14 13:36:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:37,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:38,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:38,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23928876] [2024-06-14 13:36:38,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23928876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:38,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:38,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350160946] [2024-06-14 13:36:38,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:38,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:38,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:38,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:38,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:38,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:38,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 277 transitions, 2797 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:38,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:38,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:38,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:39,226 INFO L124 PetriNetUnfolderBase]: 2808/4478 cut-off events. [2024-06-14 13:36:39,226 INFO L125 PetriNetUnfolderBase]: For 371083/371083 co-relation queries the response was YES. [2024-06-14 13:36:39,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33434 conditions, 4478 events. 2808/4478 cut-off events. For 371083/371083 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26239 event pairs, 630 based on Foata normal form. 4/4479 useless extension candidates. Maximal degree in co-relation 33327. Up to 3828 conditions per place. [2024-06-14 13:36:39,274 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 219 selfloop transitions, 89 changer transitions 0/313 dead transitions. [2024-06-14 13:36:39,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 313 transitions, 4041 flow [2024-06-14 13:36:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:36:39,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 13:36:39,299 INFO L175 Difference]: Start difference. First operand has 218 places, 277 transitions, 2797 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:36:39,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 313 transitions, 4041 flow [2024-06-14 13:36:40,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 313 transitions, 3921 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:40,154 INFO L231 Difference]: Finished difference. Result has 225 places, 290 transitions, 3138 flow [2024-06-14 13:36:40,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3138, PETRI_PLACES=225, PETRI_TRANSITIONS=290} [2024-06-14 13:36:40,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-14 13:36:40,155 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 290 transitions, 3138 flow [2024-06-14 13:36:40,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:40,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:40,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:40,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:36:40,156 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)] === [2024-06-14 13:36:40,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1633934506, now seen corresponding path program 3 times [2024-06-14 13:36:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:40,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555563141] [2024-06-14 13:36:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:40,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:40,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:40,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555563141] [2024-06-14 13:36:40,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555563141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:40,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:40,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615122253] [2024-06-14 13:36:40,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:40,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:40,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:40,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:40,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 290 transitions, 3138 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:40,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:40,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:40,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:41,776 INFO L124 PetriNetUnfolderBase]: 2856/4559 cut-off events. [2024-06-14 13:36:41,777 INFO L125 PetriNetUnfolderBase]: For 391178/391178 co-relation queries the response was YES. [2024-06-14 13:36:41,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34850 conditions, 4559 events. 2856/4559 cut-off events. For 391178/391178 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26774 event pairs, 624 based on Foata normal form. 8/4564 useless extension candidates. Maximal degree in co-relation 34740. Up to 3875 conditions per place. [2024-06-14 13:36:41,828 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 102 changer transitions 0/322 dead transitions. [2024-06-14 13:36:41,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 322 transitions, 4350 flow [2024-06-14 13:36:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:36:41,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:36:41,830 INFO L175 Difference]: Start difference. First operand has 225 places, 290 transitions, 3138 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:36:41,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 322 transitions, 4350 flow [2024-06-14 13:36:42,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 322 transitions, 4153 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:42,780 INFO L231 Difference]: Finished difference. Result has 232 places, 301 transitions, 3458 flow [2024-06-14 13:36:42,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3458, PETRI_PLACES=232, PETRI_TRANSITIONS=301} [2024-06-14 13:36:42,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-14 13:36:42,781 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 301 transitions, 3458 flow [2024-06-14 13:36:42,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:42,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:42,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:42,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:36:42,782 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)] === [2024-06-14 13:36:42,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash 926014845, now seen corresponding path program 1 times [2024-06-14 13:36:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:42,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336526860] [2024-06-14 13:36:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:43,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336526860] [2024-06-14 13:36:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336526860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:43,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:43,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:43,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303733164] [2024-06-14 13:36:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:43,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:43,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:43,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 301 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:43,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:43,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:43,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:44,441 INFO L124 PetriNetUnfolderBase]: 2836/4527 cut-off events. [2024-06-14 13:36:44,442 INFO L125 PetriNetUnfolderBase]: For 385154/385154 co-relation queries the response was YES. [2024-06-14 13:36:44,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34734 conditions, 4527 events. 2836/4527 cut-off events. For 385154/385154 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26535 event pairs, 628 based on Foata normal form. 6/4530 useless extension candidates. Maximal degree in co-relation 34620. Up to 3922 conditions per place. [2024-06-14 13:36:44,497 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 218 selfloop transitions, 109 changer transitions 0/332 dead transitions. [2024-06-14 13:36:44,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 332 transitions, 4682 flow [2024-06-14 13:36:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:36:44,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:36:44,498 INFO L175 Difference]: Start difference. First operand has 232 places, 301 transitions, 3458 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:36:44,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 332 transitions, 4682 flow [2024-06-14 13:36:45,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 332 transitions, 4507 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:45,478 INFO L231 Difference]: Finished difference. Result has 239 places, 313 transitions, 3843 flow [2024-06-14 13:36:45,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3843, PETRI_PLACES=239, PETRI_TRANSITIONS=313} [2024-06-14 13:36:45,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-14 13:36:45,479 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 313 transitions, 3843 flow [2024-06-14 13:36:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:45,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:45,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:45,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:36:45,480 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)] === [2024-06-14 13:36:45,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1125316635, now seen corresponding path program 2 times [2024-06-14 13:36:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454302449] [2024-06-14 13:36:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:45,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:46,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454302449] [2024-06-14 13:36:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454302449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:46,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:46,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030629784] [2024-06-14 13:36:46,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:46,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:46,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 313 transitions, 3843 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:46,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:46,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:46,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:47,201 INFO L124 PetriNetUnfolderBase]: 2906/4624 cut-off events. [2024-06-14 13:36:47,201 INFO L125 PetriNetUnfolderBase]: For 409244/409246 co-relation queries the response was YES. [2024-06-14 13:36:47,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36456 conditions, 4624 events. 2906/4624 cut-off events. For 409244/409246 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27150 event pairs, 692 based on Foata normal form. 6/4627 useless extension candidates. Maximal degree in co-relation 36338. Up to 3898 conditions per place. [2024-06-14 13:36:47,255 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 124 changer transitions 0/344 dead transitions. [2024-06-14 13:36:47,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 344 transitions, 5283 flow [2024-06-14 13:36:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:36:47,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:36:47,257 INFO L175 Difference]: Start difference. First operand has 239 places, 313 transitions, 3843 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:36:47,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 344 transitions, 5283 flow [2024-06-14 13:36:48,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 344 transitions, 5146 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:48,364 INFO L231 Difference]: Finished difference. Result has 246 places, 326 transitions, 4273 flow [2024-06-14 13:36:48,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4273, PETRI_PLACES=246, PETRI_TRANSITIONS=326} [2024-06-14 13:36:48,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 13:36:48,365 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 326 transitions, 4273 flow [2024-06-14 13:36:48,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:48,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:48,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:48,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:36:48,366 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)] === [2024-06-14 13:36:48,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash 420684836, now seen corresponding path program 4 times [2024-06-14 13:36:48,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:48,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365418021] [2024-06-14 13:36:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:48,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:49,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:49,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365418021] [2024-06-14 13:36:49,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365418021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:49,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:49,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:49,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926717827] [2024-06-14 13:36:49,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:49,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:49,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:49,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:49,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:49,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:49,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 326 transitions, 4273 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:49,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:49,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:49,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:50,104 INFO L124 PetriNetUnfolderBase]: 2946/4683 cut-off events. [2024-06-14 13:36:50,104 INFO L125 PetriNetUnfolderBase]: For 431331/431333 co-relation queries the response was YES. [2024-06-14 13:36:50,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38181 conditions, 4683 events. 2946/4683 cut-off events. For 431331/431333 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27467 event pairs, 680 based on Foata normal form. 8/4688 useless extension candidates. Maximal degree in co-relation 38059. Up to 3729 conditions per place. [2024-06-14 13:36:50,159 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 218 selfloop transitions, 141 changer transitions 0/364 dead transitions. [2024-06-14 13:36:50,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 364 transitions, 5834 flow [2024-06-14 13:36:50,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:36:50,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 13:36:50,161 INFO L175 Difference]: Start difference. First operand has 246 places, 326 transitions, 4273 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:36:50,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 364 transitions, 5834 flow [2024-06-14 13:36:51,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 364 transitions, 5530 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:51,301 INFO L231 Difference]: Finished difference. Result has 253 places, 345 transitions, 4662 flow [2024-06-14 13:36:51,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4662, PETRI_PLACES=253, PETRI_TRANSITIONS=345} [2024-06-14 13:36:51,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-14 13:36:51,302 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 345 transitions, 4662 flow [2024-06-14 13:36:51,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:51,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:51,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:51,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:36:51,303 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:51,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash -430472815, now seen corresponding path program 3 times [2024-06-14 13:36:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:51,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955079558] [2024-06-14 13:36:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:51,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:52,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955079558] [2024-06-14 13:36:52,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955079558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:52,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:52,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:52,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827500840] [2024-06-14 13:36:52,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:52,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:52,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 345 transitions, 4662 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:52,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:52,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:52,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:53,220 INFO L124 PetriNetUnfolderBase]: 3000/4756 cut-off events. [2024-06-14 13:36:53,220 INFO L125 PetriNetUnfolderBase]: For 445858/445860 co-relation queries the response was YES. [2024-06-14 13:36:53,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39651 conditions, 4756 events. 3000/4756 cut-off events. For 445858/445860 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27839 event pairs, 669 based on Foata normal form. 6/4759 useless extension candidates. Maximal degree in co-relation 39526. Up to 4011 conditions per place. [2024-06-14 13:36:53,287 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 216 selfloop transitions, 150 changer transitions 0/371 dead transitions. [2024-06-14 13:36:53,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 371 transitions, 6075 flow [2024-06-14 13:36:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:36:53,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:36:53,289 INFO L175 Difference]: Start difference. First operand has 253 places, 345 transitions, 4662 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:36:53,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 371 transitions, 6075 flow [2024-06-14 13:36:54,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 371 transitions, 5899 flow, removed 87 selfloop flow, removed 1 redundant places. [2024-06-14 13:36:54,423 INFO L231 Difference]: Finished difference. Result has 260 places, 354 transitions, 5008 flow [2024-06-14 13:36:54,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5008, PETRI_PLACES=260, PETRI_TRANSITIONS=354} [2024-06-14 13:36:54,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-14 13:36:54,424 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 354 transitions, 5008 flow [2024-06-14 13:36:54,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:54,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:54,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:54,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:36:54,424 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)] === [2024-06-14 13:36:54,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:54,425 INFO L85 PathProgramCache]: Analyzing trace with hash -430473032, now seen corresponding path program 5 times [2024-06-14 13:36:54,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:54,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722848000] [2024-06-14 13:36:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:54,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722848000] [2024-06-14 13:36:55,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722848000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:55,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:55,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:55,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337819082] [2024-06-14 13:36:55,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:55,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:55,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:55,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:55,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 354 transitions, 5008 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:55,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:55,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:55,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:56,298 INFO L124 PetriNetUnfolderBase]: 3000/4766 cut-off events. [2024-06-14 13:36:56,299 INFO L125 PetriNetUnfolderBase]: For 449235/449237 co-relation queries the response was YES. [2024-06-14 13:36:56,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39469 conditions, 4766 events. 3000/4766 cut-off events. For 449235/449237 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27985 event pairs, 665 based on Foata normal form. 8/4771 useless extension candidates. Maximal degree in co-relation 39341. Up to 3777 conditions per place. [2024-06-14 13:36:56,357 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 203 selfloop transitions, 173 changer transitions 0/381 dead transitions. [2024-06-14 13:36:56,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 6469 flow [2024-06-14 13:36:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:36:56,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:36:56,359 INFO L175 Difference]: Start difference. First operand has 260 places, 354 transitions, 5008 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:36:56,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 6469 flow [2024-06-14 13:36:57,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 381 transitions, 6218 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-14 13:36:57,390 INFO L231 Difference]: Finished difference. Result has 266 places, 363 transitions, 5334 flow [2024-06-14 13:36:57,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4757, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5334, PETRI_PLACES=266, PETRI_TRANSITIONS=363} [2024-06-14 13:36:57,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-14 13:36:57,391 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 363 transitions, 5334 flow [2024-06-14 13:36:57,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:57,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:57,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:57,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:36:57,392 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:57,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1125310838, now seen corresponding path program 6 times [2024-06-14 13:36:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:57,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794948747] [2024-06-14 13:36:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:57,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:58,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:58,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794948747] [2024-06-14 13:36:58,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794948747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:58,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:58,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:58,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223902143] [2024-06-14 13:36:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:58,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:58,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:58,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:36:58,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 363 transitions, 5334 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:36:58,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:58,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:36:58,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:59,140 INFO L124 PetriNetUnfolderBase]: 3004/4770 cut-off events. [2024-06-14 13:36:59,141 INFO L125 PetriNetUnfolderBase]: For 445582/445584 co-relation queries the response was YES. [2024-06-14 13:36:59,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40042 conditions, 4770 events. 3004/4770 cut-off events. For 445582/445584 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28013 event pairs, 684 based on Foata normal form. 4/4771 useless extension candidates. Maximal degree in co-relation 39911. Up to 3788 conditions per place. [2024-06-14 13:36:59,209 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 223 selfloop transitions, 156 changer transitions 0/384 dead transitions. [2024-06-14 13:36:59,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 384 transitions, 6656 flow [2024-06-14 13:36:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:36:59,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-14 13:36:59,210 INFO L175 Difference]: Start difference. First operand has 266 places, 363 transitions, 5334 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:36:59,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 384 transitions, 6656 flow [2024-06-14 13:37:00,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 384 transitions, 6395 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-14 13:37:00,392 INFO L231 Difference]: Finished difference. Result has 272 places, 367 transitions, 5506 flow [2024-06-14 13:37:00,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5073, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5506, PETRI_PLACES=272, PETRI_TRANSITIONS=367} [2024-06-14 13:37:00,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-14 13:37:00,393 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 367 transitions, 5506 flow [2024-06-14 13:37:00,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:00,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:00,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:00,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:37:00,394 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:00,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:00,394 INFO L85 PathProgramCache]: Analyzing trace with hash -437615215, now seen corresponding path program 4 times [2024-06-14 13:37:00,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:00,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3152638] [2024-06-14 13:37:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:00,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:01,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:01,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3152638] [2024-06-14 13:37:01,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3152638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:01,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:01,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:01,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696378291] [2024-06-14 13:37:01,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:01,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:01,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:01,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:01,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 367 transitions, 5506 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:01,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:01,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:01,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:02,158 INFO L124 PetriNetUnfolderBase]: 2990/4750 cut-off events. [2024-06-14 13:37:02,158 INFO L125 PetriNetUnfolderBase]: For 443627/443629 co-relation queries the response was YES. [2024-06-14 13:37:02,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39952 conditions, 4750 events. 2990/4750 cut-off events. For 443627/443629 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27860 event pairs, 673 based on Foata normal form. 2/4749 useless extension candidates. Maximal degree in co-relation 39819. Up to 3925 conditions per place. [2024-06-14 13:37:02,218 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 210 selfloop transitions, 167 changer transitions 0/382 dead transitions. [2024-06-14 13:37:02,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 382 transitions, 6602 flow [2024-06-14 13:37:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:02,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:37:02,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 13:37:02,219 INFO L175 Difference]: Start difference. First operand has 272 places, 367 transitions, 5506 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:37:02,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 382 transitions, 6602 flow [2024-06-14 13:37:03,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 382 transitions, 6263 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:03,641 INFO L231 Difference]: Finished difference. Result has 275 places, 367 transitions, 5508 flow [2024-06-14 13:37:03,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5167, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5508, PETRI_PLACES=275, PETRI_TRANSITIONS=367} [2024-06-14 13:37:03,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 13:37:03,642 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 367 transitions, 5508 flow [2024-06-14 13:37:03,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:03,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:03,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:03,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:37:03,643 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)] === [2024-06-14 13:37:03,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1828725294, now seen corresponding path program 1 times [2024-06-14 13:37:03,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:03,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515538732] [2024-06-14 13:37:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:03,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:04,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:04,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515538732] [2024-06-14 13:37:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515538732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:04,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:04,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121251067] [2024-06-14 13:37:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:04,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:04,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 367 transitions, 5508 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:04,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:04,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:04,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:05,383 INFO L124 PetriNetUnfolderBase]: 3000/4774 cut-off events. [2024-06-14 13:37:05,384 INFO L125 PetriNetUnfolderBase]: For 453456/453458 co-relation queries the response was YES. [2024-06-14 13:37:05,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40182 conditions, 4774 events. 3000/4774 cut-off events. For 453456/453458 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28160 event pairs, 658 based on Foata normal form. 2/4775 useless extension candidates. Maximal degree in co-relation 40048. Up to 4390 conditions per place. [2024-06-14 13:37:05,444 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 70 changer transitions 0/395 dead transitions. [2024-06-14 13:37:05,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 395 transitions, 6478 flow [2024-06-14 13:37:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:37:05,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 13:37:05,445 INFO L175 Difference]: Start difference. First operand has 275 places, 367 transitions, 5508 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:37:05,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 395 transitions, 6478 flow [2024-06-14 13:37:06,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 395 transitions, 6134 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:06,707 INFO L231 Difference]: Finished difference. Result has 278 places, 371 transitions, 5425 flow [2024-06-14 13:37:06,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5170, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5425, PETRI_PLACES=278, PETRI_TRANSITIONS=371} [2024-06-14 13:37:06,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 13:37:06,711 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 371 transitions, 5425 flow [2024-06-14 13:37:06,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:06,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:06,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:06,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:37:06,711 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)] === [2024-06-14 13:37:06,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:06,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1481487624, now seen corresponding path program 2 times [2024-06-14 13:37:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:06,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903685623] [2024-06-14 13:37:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:06,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:07,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:07,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903685623] [2024-06-14 13:37:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903685623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:07,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:07,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056169804] [2024-06-14 13:37:07,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:07,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:07,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:07,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:07,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 371 transitions, 5425 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:07,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:07,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:07,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:08,453 INFO L124 PetriNetUnfolderBase]: 3018/4788 cut-off events. [2024-06-14 13:37:08,453 INFO L125 PetriNetUnfolderBase]: For 466833/466835 co-relation queries the response was YES. [2024-06-14 13:37:08,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40378 conditions, 4788 events. 3018/4788 cut-off events. For 466833/466835 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28149 event pairs, 687 based on Foata normal form. 2/4789 useless extension candidates. Maximal degree in co-relation 40242. Up to 4394 conditions per place. [2024-06-14 13:37:08,518 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 76 changer transitions 0/399 dead transitions. [2024-06-14 13:37:08,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 6607 flow [2024-06-14 13:37:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:37:08,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:37:08,519 INFO L175 Difference]: Start difference. First operand has 278 places, 371 transitions, 5425 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:37:08,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 6607 flow [2024-06-14 13:37:09,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 399 transitions, 6476 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:09,583 INFO L231 Difference]: Finished difference. Result has 283 places, 377 transitions, 5644 flow [2024-06-14 13:37:09,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5644, PETRI_PLACES=283, PETRI_TRANSITIONS=377} [2024-06-14 13:37:09,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-14 13:37:09,584 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 377 transitions, 5644 flow [2024-06-14 13:37:09,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:09,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:09,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:09,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:37:09,585 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:09,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:09,587 INFO L85 PathProgramCache]: Analyzing trace with hash -344929358, now seen corresponding path program 3 times [2024-06-14 13:37:09,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:09,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612982216] [2024-06-14 13:37:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:10,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:10,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612982216] [2024-06-14 13:37:10,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612982216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:10,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:10,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:10,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908973674] [2024-06-14 13:37:10,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:10,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:10,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:10,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 377 transitions, 5644 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:10,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:10,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:10,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:11,308 INFO L124 PetriNetUnfolderBase]: 3068/4865 cut-off events. [2024-06-14 13:37:11,309 INFO L125 PetriNetUnfolderBase]: For 496243/496245 co-relation queries the response was YES. [2024-06-14 13:37:11,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41779 conditions, 4865 events. 3068/4865 cut-off events. For 496243/496245 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28677 event pairs, 701 based on Foata normal form. 2/4866 useless extension candidates. Maximal degree in co-relation 41641. Up to 4410 conditions per place. [2024-06-14 13:37:11,376 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 93 changer transitions 0/407 dead transitions. [2024-06-14 13:37:11,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 407 transitions, 6982 flow [2024-06-14 13:37:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:37:11,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 13:37:11,378 INFO L175 Difference]: Start difference. First operand has 283 places, 377 transitions, 5644 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:37:11,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 407 transitions, 6982 flow [2024-06-14 13:37:12,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 407 transitions, 6822 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:12,580 INFO L231 Difference]: Finished difference. Result has 287 places, 389 transitions, 6066 flow [2024-06-14 13:37:12,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6066, PETRI_PLACES=287, PETRI_TRANSITIONS=389} [2024-06-14 13:37:12,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-14 13:37:12,580 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 389 transitions, 6066 flow [2024-06-14 13:37:12,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:12,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:12,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:12,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:37:12,581 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:12,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash -148561520, now seen corresponding path program 4 times [2024-06-14 13:37:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:12,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78299237] [2024-06-14 13:37:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:12,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:13,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:13,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78299237] [2024-06-14 13:37:13,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78299237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:13,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:13,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:13,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325473341] [2024-06-14 13:37:13,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:13,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:13,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:13,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:13,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:13,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 389 transitions, 6066 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:13,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:13,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:13,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:14,325 INFO L124 PetriNetUnfolderBase]: 3078/4885 cut-off events. [2024-06-14 13:37:14,325 INFO L125 PetriNetUnfolderBase]: For 509247/509247 co-relation queries the response was YES. [2024-06-14 13:37:14,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42343 conditions, 4885 events. 3078/4885 cut-off events. For 509247/509247 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28848 event pairs, 673 based on Foata normal form. 2/4885 useless extension candidates. Maximal degree in co-relation 42203. Up to 4500 conditions per place. [2024-06-14 13:37:14,390 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 68 changer transitions 0/414 dead transitions. [2024-06-14 13:37:14,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 414 transitions, 7069 flow [2024-06-14 13:37:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:37:14,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:37:14,391 INFO L175 Difference]: Start difference. First operand has 287 places, 389 transitions, 6066 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:37:14,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 414 transitions, 7069 flow [2024-06-14 13:37:15,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 414 transitions, 6888 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:15,981 INFO L231 Difference]: Finished difference. Result has 291 places, 393 transitions, 6149 flow [2024-06-14 13:37:15,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6149, PETRI_PLACES=291, PETRI_TRANSITIONS=393} [2024-06-14 13:37:15,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-14 13:37:15,981 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 393 transitions, 6149 flow [2024-06-14 13:37:15,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:15,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:15,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:37:15,982 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:15,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash 759779886, now seen corresponding path program 5 times [2024-06-14 13:37:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495721999] [2024-06-14 13:37:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:15,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:16,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:16,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495721999] [2024-06-14 13:37:16,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495721999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:16,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:16,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:16,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925510582] [2024-06-14 13:37:16,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:16,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:16,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:16,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:16,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:16,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:16,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 393 transitions, 6149 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:16,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:16,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:16,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:17,765 INFO L124 PetriNetUnfolderBase]: 3072/4872 cut-off events. [2024-06-14 13:37:17,765 INFO L125 PetriNetUnfolderBase]: For 513991/513991 co-relation queries the response was YES. [2024-06-14 13:37:17,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42179 conditions, 4872 events. 3072/4872 cut-off events. For 513991/513991 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28725 event pairs, 676 based on Foata normal form. 2/4871 useless extension candidates. Maximal degree in co-relation 42037. Up to 4492 conditions per place. [2024-06-14 13:37:17,862 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 72 changer transitions 0/415 dead transitions. [2024-06-14 13:37:17,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 415 transitions, 7055 flow [2024-06-14 13:37:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:37:17,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 13:37:17,864 INFO L175 Difference]: Start difference. First operand has 291 places, 393 transitions, 6149 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:37:17,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 415 transitions, 7055 flow [2024-06-14 13:37:19,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 415 transitions, 6925 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:19,574 INFO L231 Difference]: Finished difference. Result has 295 places, 393 transitions, 6170 flow [2024-06-14 13:37:19,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6019, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6170, PETRI_PLACES=295, PETRI_TRANSITIONS=393} [2024-06-14 13:37:19,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-14 13:37:19,575 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 393 transitions, 6170 flow [2024-06-14 13:37:19,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:19,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:19,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:19,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:37:19,575 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:19,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash 34381608, now seen corresponding path program 6 times [2024-06-14 13:37:19,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:19,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704675618] [2024-06-14 13:37:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:19,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:20,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704675618] [2024-06-14 13:37:20,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704675618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:20,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:20,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:20,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811098207] [2024-06-14 13:37:20,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:20,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:20,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:20,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:20,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 393 transitions, 6170 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:20,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:20,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:20,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:21,275 INFO L124 PetriNetUnfolderBase]: 3066/4870 cut-off events. [2024-06-14 13:37:21,276 INFO L125 PetriNetUnfolderBase]: For 519425/519425 co-relation queries the response was YES. [2024-06-14 13:37:21,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42108 conditions, 4870 events. 3066/4870 cut-off events. For 519425/519425 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28742 event pairs, 674 based on Foata normal form. 2/4869 useless extension candidates. Maximal degree in co-relation 41965. Up to 4455 conditions per place. [2024-06-14 13:37:21,454 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 78 changer transitions 0/413 dead transitions. [2024-06-14 13:37:21,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 413 transitions, 7218 flow [2024-06-14 13:37:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:37:21,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:37:21,456 INFO L175 Difference]: Start difference. First operand has 295 places, 393 transitions, 6170 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:37:21,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 413 transitions, 7218 flow [2024-06-14 13:37:23,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 413 transitions, 7005 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 13:37:23,044 INFO L231 Difference]: Finished difference. Result has 294 places, 393 transitions, 6119 flow [2024-06-14 13:37:23,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6119, PETRI_PLACES=294, PETRI_TRANSITIONS=393} [2024-06-14 13:37:23,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 13:37:23,045 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 393 transitions, 6119 flow [2024-06-14 13:37:23,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:23,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:23,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:23,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:37:23,045 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)] === [2024-06-14 13:37:23,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash 41769528, now seen corresponding path program 7 times [2024-06-14 13:37:23,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:23,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497922612] [2024-06-14 13:37:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:23,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:23,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:23,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497922612] [2024-06-14 13:37:23,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497922612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:23,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:23,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239764749] [2024-06-14 13:37:23,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:23,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:23,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:23,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:23,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 393 transitions, 6119 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:23,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:23,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:23,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:24,835 INFO L124 PetriNetUnfolderBase]: 3050/4847 cut-off events. [2024-06-14 13:37:24,836 INFO L125 PetriNetUnfolderBase]: For 524345/524345 co-relation queries the response was YES. [2024-06-14 13:37:24,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41527 conditions, 4847 events. 3050/4847 cut-off events. For 524345/524345 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28627 event pairs, 657 based on Foata normal form. 4/4848 useless extension candidates. Maximal degree in co-relation 41386. Up to 4394 conditions per place. [2024-06-14 13:37:24,895 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 324 selfloop transitions, 84 changer transitions 0/413 dead transitions. [2024-06-14 13:37:24,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 413 transitions, 7013 flow [2024-06-14 13:37:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:37:24,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:37:24,896 INFO L175 Difference]: Start difference. First operand has 294 places, 393 transitions, 6119 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:37:24,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 413 transitions, 7013 flow [2024-06-14 13:37:26,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 413 transitions, 6766 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:26,479 INFO L231 Difference]: Finished difference. Result has 295 places, 393 transitions, 6048 flow [2024-06-14 13:37:26,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6048, PETRI_PLACES=295, PETRI_TRANSITIONS=393} [2024-06-14 13:37:26,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-14 13:37:26,480 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 393 transitions, 6048 flow [2024-06-14 13:37:26,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:26,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:26,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:26,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:37:26,481 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)] === [2024-06-14 13:37:26,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash 887451216, now seen corresponding path program 8 times [2024-06-14 13:37:26,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:26,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645882051] [2024-06-14 13:37:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:27,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:27,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645882051] [2024-06-14 13:37:27,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645882051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:27,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:27,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:27,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224043453] [2024-06-14 13:37:27,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:27,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:27,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:27,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:27,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:27,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 393 transitions, 6048 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:27,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:27,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:27,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:28,324 INFO L124 PetriNetUnfolderBase]: 3080/4893 cut-off events. [2024-06-14 13:37:28,325 INFO L125 PetriNetUnfolderBase]: For 543131/543131 co-relation queries the response was YES. [2024-06-14 13:37:28,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42059 conditions, 4893 events. 3080/4893 cut-off events. For 543131/543131 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28906 event pairs, 670 based on Foata normal form. 6/4896 useless extension candidates. Maximal degree in co-relation 41918. Up to 4149 conditions per place. [2024-06-14 13:37:28,386 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 286 selfloop transitions, 128 changer transitions 0/419 dead transitions. [2024-06-14 13:37:28,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 419 transitions, 7427 flow [2024-06-14 13:37:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:37:28,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:37:28,387 INFO L175 Difference]: Start difference. First operand has 295 places, 393 transitions, 6048 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:37:28,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 419 transitions, 7427 flow [2024-06-14 13:37:29,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 419 transitions, 7221 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:29,856 INFO L231 Difference]: Finished difference. Result has 296 places, 400 transitions, 6270 flow [2024-06-14 13:37:29,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6270, PETRI_PLACES=296, PETRI_TRANSITIONS=400} [2024-06-14 13:37:29,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-14 13:37:29,857 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 400 transitions, 6270 flow [2024-06-14 13:37:29,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:29,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:29,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:29,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:37:29,858 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)] === [2024-06-14 13:37:29,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:29,858 INFO L85 PathProgramCache]: Analyzing trace with hash 887184306, now seen corresponding path program 9 times [2024-06-14 13:37:29,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:29,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953956160] [2024-06-14 13:37:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:29,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:30,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:30,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953956160] [2024-06-14 13:37:30,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953956160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:30,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:30,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:30,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326410650] [2024-06-14 13:37:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:30,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:30,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 400 transitions, 6270 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:30,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:30,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:30,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:31,639 INFO L124 PetriNetUnfolderBase]: 3060/4875 cut-off events. [2024-06-14 13:37:31,639 INFO L125 PetriNetUnfolderBase]: For 535534/535534 co-relation queries the response was YES. [2024-06-14 13:37:31,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41609 conditions, 4875 events. 3060/4875 cut-off events. For 535534/535534 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28889 event pairs, 650 based on Foata normal form. 6/4878 useless extension candidates. Maximal degree in co-relation 41467. Up to 4138 conditions per place. [2024-06-14 13:37:31,707 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 283 selfloop transitions, 131 changer transitions 0/419 dead transitions. [2024-06-14 13:37:31,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 419 transitions, 7496 flow [2024-06-14 13:37:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:37:31,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 13:37:31,708 INFO L175 Difference]: Start difference. First operand has 296 places, 400 transitions, 6270 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:37:31,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 419 transitions, 7496 flow [2024-06-14 13:37:33,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 419 transitions, 7199 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:33,273 INFO L231 Difference]: Finished difference. Result has 299 places, 400 transitions, 6246 flow [2024-06-14 13:37:33,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5973, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6246, PETRI_PLACES=299, PETRI_TRANSITIONS=400} [2024-06-14 13:37:33,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-14 13:37:33,274 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 400 transitions, 6246 flow [2024-06-14 13:37:33,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:33,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:33,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:33,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:37:33,275 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)] === [2024-06-14 13:37:33,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash -688109374, now seen corresponding path program 10 times [2024-06-14 13:37:33,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:33,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567325942] [2024-06-14 13:37:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:33,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567325942] [2024-06-14 13:37:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567325942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:34,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:34,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774943319] [2024-06-14 13:37:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:34,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:34,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:34,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:34,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 400 transitions, 6246 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:34,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:34,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:34,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:35,536 INFO L124 PetriNetUnfolderBase]: 3090/4915 cut-off events. [2024-06-14 13:37:35,536 INFO L125 PetriNetUnfolderBase]: For 548111/548113 co-relation queries the response was YES. [2024-06-14 13:37:35,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41947 conditions, 4915 events. 3090/4915 cut-off events. For 548111/548113 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29144 event pairs, 688 based on Foata normal form. 6/4918 useless extension candidates. Maximal degree in co-relation 41804. Up to 3849 conditions per place. [2024-06-14 13:37:35,647 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 187 changer transitions 0/424 dead transitions. [2024-06-14 13:37:35,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 424 transitions, 7760 flow [2024-06-14 13:37:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:37:35,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:37:35,649 INFO L175 Difference]: Start difference. First operand has 299 places, 400 transitions, 6246 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:37:35,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 424 transitions, 7760 flow [2024-06-14 13:37:37,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 424 transitions, 7265 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-14 13:37:37,824 INFO L231 Difference]: Finished difference. Result has 297 places, 407 transitions, 6262 flow [2024-06-14 13:37:37,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6262, PETRI_PLACES=297, PETRI_TRANSITIONS=407} [2024-06-14 13:37:37,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-14 13:37:37,824 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 407 transitions, 6262 flow [2024-06-14 13:37:37,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:37,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:37,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:37,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:37:37,825 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)] === [2024-06-14 13:37:37,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1490235214, now seen corresponding path program 11 times [2024-06-14 13:37:37,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:37,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019571628] [2024-06-14 13:37:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:37,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:38,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:38,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019571628] [2024-06-14 13:37:38,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019571628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:38,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:38,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173232657] [2024-06-14 13:37:38,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:38,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:38,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 407 transitions, 6262 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:38,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:38,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:38,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:39,719 INFO L124 PetriNetUnfolderBase]: 3148/4996 cut-off events. [2024-06-14 13:37:39,720 INFO L125 PetriNetUnfolderBase]: For 570635/570637 co-relation queries the response was YES. [2024-06-14 13:37:39,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42994 conditions, 4996 events. 3148/4996 cut-off events. For 570635/570637 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29560 event pairs, 704 based on Foata normal form. 6/4999 useless extension candidates. Maximal degree in co-relation 42852. Up to 3897 conditions per place. [2024-06-14 13:37:39,786 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 239 selfloop transitions, 191 changer transitions 0/435 dead transitions. [2024-06-14 13:37:39,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 435 transitions, 7901 flow [2024-06-14 13:37:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:37:39,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:37:39,788 INFO L175 Difference]: Start difference. First operand has 297 places, 407 transitions, 6262 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:37:39,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 435 transitions, 7901 flow [2024-06-14 13:37:41,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 435 transitions, 7520 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:41,940 INFO L231 Difference]: Finished difference. Result has 301 places, 418 transitions, 6523 flow [2024-06-14 13:37:41,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6523, PETRI_PLACES=301, PETRI_TRANSITIONS=418} [2024-06-14 13:37:41,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-14 13:37:41,940 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 418 transitions, 6523 flow [2024-06-14 13:37:41,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:41,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:41,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:41,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:37:41,941 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)] === [2024-06-14 13:37:41,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:41,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1731803600, now seen corresponding path program 12 times [2024-06-14 13:37:41,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:41,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080666333] [2024-06-14 13:37:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:41,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:42,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:42,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080666333] [2024-06-14 13:37:42,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080666333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:42,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:42,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:42,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948644061] [2024-06-14 13:37:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:42,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:42,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:42,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:42,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:42,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 418 transitions, 6523 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:42,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:42,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:42,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:43,807 INFO L124 PetriNetUnfolderBase]: 3126/4967 cut-off events. [2024-06-14 13:37:43,807 INFO L125 PetriNetUnfolderBase]: For 561399/561401 co-relation queries the response was YES. [2024-06-14 13:37:43,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42439 conditions, 4967 events. 3126/4967 cut-off events. For 561399/561401 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29409 event pairs, 688 based on Foata normal form. 6/4970 useless extension candidates. Maximal degree in co-relation 42295. Up to 3883 conditions per place. [2024-06-14 13:37:43,882 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 221 selfloop transitions, 209 changer transitions 0/435 dead transitions. [2024-06-14 13:37:43,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 435 transitions, 7951 flow [2024-06-14 13:37:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:37:43,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 13:37:43,883 INFO L175 Difference]: Start difference. First operand has 301 places, 418 transitions, 6523 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:37:43,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 435 transitions, 7951 flow [2024-06-14 13:37:45,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 435 transitions, 7573 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:45,946 INFO L231 Difference]: Finished difference. Result has 305 places, 418 transitions, 6574 flow [2024-06-14 13:37:45,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6145, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6574, PETRI_PLACES=305, PETRI_TRANSITIONS=418} [2024-06-14 13:37:45,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-14 13:37:45,947 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 418 transitions, 6574 flow [2024-06-14 13:37:45,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:37:45,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:45,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:45,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:37:45,948 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)] === [2024-06-14 13:37:45,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:45,948 INFO L85 PathProgramCache]: Analyzing trace with hash 746738974, now seen corresponding path program 1 times [2024-06-14 13:37:45,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:45,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463388577] [2024-06-14 13:37:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:45,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:46,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:46,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463388577] [2024-06-14 13:37:46,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463388577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:46,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:46,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853201497] [2024-06-14 13:37:46,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:46,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:46,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:47,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:37:47,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 418 transitions, 6574 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:47,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:47,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:37:47,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:48,158 INFO L124 PetriNetUnfolderBase]: 3006/4832 cut-off events. [2024-06-14 13:37:48,158 INFO L125 PetriNetUnfolderBase]: For 601725/601730 co-relation queries the response was YES. [2024-06-14 13:37:48,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41311 conditions, 4832 events. 3006/4832 cut-off events. For 601725/601730 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29028 event pairs, 646 based on Foata normal form. 15/4815 useless extension candidates. Maximal degree in co-relation 41166. Up to 4184 conditions per place. [2024-06-14 13:37:48,229 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 50 changer transitions 0/437 dead transitions. [2024-06-14 13:37:48,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 437 transitions, 7408 flow [2024-06-14 13:37:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:37:48,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:37:48,231 INFO L175 Difference]: Start difference. First operand has 305 places, 418 transitions, 6574 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:37:48,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 437 transitions, 7408 flow [2024-06-14 13:37:50,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 437 transitions, 6664 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-14 13:37:50,271 INFO L231 Difference]: Finished difference. Result has 303 places, 420 transitions, 5987 flow [2024-06-14 13:37:50,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5830, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5987, PETRI_PLACES=303, PETRI_TRANSITIONS=420} [2024-06-14 13:37:50,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 13:37:50,272 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 420 transitions, 5987 flow [2024-06-14 13:37:50,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:50,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:50,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:50,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:37:50,272 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)] === [2024-06-14 13:37:50,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -451190200, now seen corresponding path program 2 times [2024-06-14 13:37:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492577323] [2024-06-14 13:37:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:50,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492577323] [2024-06-14 13:37:51,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492577323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:51,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:51,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:51,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770982419] [2024-06-14 13:37:51,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:51,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:51,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 13:37:51,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 420 transitions, 5987 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:51,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:51,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 13:37:51,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:52,473 INFO L124 PetriNetUnfolderBase]: 3067/4929 cut-off events. [2024-06-14 13:37:52,473 INFO L125 PetriNetUnfolderBase]: For 607977/607982 co-relation queries the response was YES. [2024-06-14 13:37:52,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41827 conditions, 4929 events. 3067/4929 cut-off events. For 607977/607982 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 29646 event pairs, 661 based on Foata normal form. 9/4909 useless extension candidates. Maximal degree in co-relation 41683. Up to 4146 conditions per place. [2024-06-14 13:37:52,546 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 48 changer transitions 0/443 dead transitions. [2024-06-14 13:37:52,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 443 transitions, 7053 flow [2024-06-14 13:37:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:37:52,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 13:37:52,548 INFO L175 Difference]: Start difference. First operand has 303 places, 420 transitions, 5987 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:37:52,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 443 transitions, 7053 flow [2024-06-14 13:37:55,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 443 transitions, 6934 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:55,108 INFO L231 Difference]: Finished difference. Result has 304 places, 422 transitions, 6010 flow [2024-06-14 13:37:55,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6010, PETRI_PLACES=304, PETRI_TRANSITIONS=422} [2024-06-14 13:37:55,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-14 13:37:55,109 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 422 transitions, 6010 flow [2024-06-14 13:37:55,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:55,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:55,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:37:55,110 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)] === [2024-06-14 13:37:55,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash 769313006, now seen corresponding path program 1 times [2024-06-14 13:37:55,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:55,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122838337] [2024-06-14 13:37:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:55,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:55,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:55,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122838337] [2024-06-14 13:37:55,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122838337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:55,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:55,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:55,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632049637] [2024-06-14 13:37:55,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:55,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:55,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:56,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:37:56,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 422 transitions, 6010 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:56,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:56,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:37:56,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:57,207 INFO L124 PetriNetUnfolderBase]: 3247/5160 cut-off events. [2024-06-14 13:37:57,207 INFO L125 PetriNetUnfolderBase]: For 601100/601100 co-relation queries the response was YES. [2024-06-14 13:37:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43774 conditions, 5160 events. 3247/5160 cut-off events. For 601100/601100 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30780 event pairs, 844 based on Foata normal form. 2/5161 useless extension candidates. Maximal degree in co-relation 43629. Up to 4894 conditions per place. [2024-06-14 13:37:57,273 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 18 changer transitions 0/445 dead transitions. [2024-06-14 13:37:57,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 445 transitions, 7034 flow [2024-06-14 13:37:57,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:37:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:37:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:37:57,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 13:37:57,274 INFO L175 Difference]: Start difference. First operand has 304 places, 422 transitions, 6010 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:37:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 445 transitions, 7034 flow [2024-06-14 13:37:59,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 445 transitions, 6971 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:59,254 INFO L231 Difference]: Finished difference. Result has 308 places, 424 transitions, 6060 flow [2024-06-14 13:37:59,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5947, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6060, PETRI_PLACES=308, PETRI_TRANSITIONS=424} [2024-06-14 13:37:59,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-14 13:37:59,255 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 424 transitions, 6060 flow [2024-06-14 13:37:59,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:59,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:59,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:59,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:37:59,256 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)] === [2024-06-14 13:37:59,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash 769373580, now seen corresponding path program 1 times [2024-06-14 13:37:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:59,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912951316] [2024-06-14 13:37:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:59,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:00,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912951316] [2024-06-14 13:38:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912951316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:00,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009677249] [2024-06-14 13:38:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:00,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:00,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 424 transitions, 6060 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:00,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:00,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:00,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:01,588 INFO L124 PetriNetUnfolderBase]: 3241/5137 cut-off events. [2024-06-14 13:38:01,589 INFO L125 PetriNetUnfolderBase]: For 604948/604948 co-relation queries the response was YES. [2024-06-14 13:38:01,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43739 conditions, 5137 events. 3241/5137 cut-off events. For 604948/604948 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30481 event pairs, 674 based on Foata normal form. 2/5136 useless extension candidates. Maximal degree in co-relation 43592. Up to 4639 conditions per place. [2024-06-14 13:38:01,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 99 changer transitions 0/445 dead transitions. [2024-06-14 13:38:01,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 445 transitions, 7200 flow [2024-06-14 13:38:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:38:01,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:38:01,696 INFO L175 Difference]: Start difference. First operand has 308 places, 424 transitions, 6060 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:38:01,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 445 transitions, 7200 flow [2024-06-14 13:38:03,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 445 transitions, 7069 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:03,678 INFO L231 Difference]: Finished difference. Result has 310 places, 424 transitions, 6146 flow [2024-06-14 13:38:03,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6146, PETRI_PLACES=310, PETRI_TRANSITIONS=424} [2024-06-14 13:38:03,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-14 13:38:03,679 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 424 transitions, 6146 flow [2024-06-14 13:38:03,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:03,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:03,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:03,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:38:03,679 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)] === [2024-06-14 13:38:03,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -636809832, now seen corresponding path program 2 times [2024-06-14 13:38:03,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:03,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797338696] [2024-06-14 13:38:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:04,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:04,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797338696] [2024-06-14 13:38:04,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797338696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:04,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:04,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:04,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137959711] [2024-06-14 13:38:04,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:04,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:04,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:04,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:04,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 424 transitions, 6146 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:04,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:04,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:04,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:05,893 INFO L124 PetriNetUnfolderBase]: 3249/5165 cut-off events. [2024-06-14 13:38:05,893 INFO L125 PetriNetUnfolderBase]: For 621684/621684 co-relation queries the response was YES. [2024-06-14 13:38:05,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44203 conditions, 5165 events. 3249/5165 cut-off events. For 621684/621684 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30800 event pairs, 856 based on Foata normal form. 2/5166 useless extension candidates. Maximal degree in co-relation 44055. Up to 4907 conditions per place. [2024-06-14 13:38:05,963 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 417 selfloop transitions, 22 changer transitions 0/444 dead transitions. [2024-06-14 13:38:05,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 444 transitions, 7160 flow [2024-06-14 13:38:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:38:05,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:38:05,965 INFO L175 Difference]: Start difference. First operand has 310 places, 424 transitions, 6146 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:38:05,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 444 transitions, 7160 flow [2024-06-14 13:38:08,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 444 transitions, 6956 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:08,220 INFO L231 Difference]: Finished difference. Result has 312 places, 426 transitions, 6068 flow [2024-06-14 13:38:08,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6068, PETRI_PLACES=312, PETRI_TRANSITIONS=426} [2024-06-14 13:38:08,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-14 13:38:08,220 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 426 transitions, 6068 flow [2024-06-14 13:38:08,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:08,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:08,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:08,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:38:08,221 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)] === [2024-06-14 13:38:08,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash 887461136, now seen corresponding path program 3 times [2024-06-14 13:38:08,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:08,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611965032] [2024-06-14 13:38:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:08,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611965032] [2024-06-14 13:38:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611965032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:09,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:09,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:09,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978642064] [2024-06-14 13:38:09,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:09,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:09,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:09,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:09,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:09,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:09,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 426 transitions, 6068 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:09,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:09,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:09,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:10,391 INFO L124 PetriNetUnfolderBase]: 3257/5172 cut-off events. [2024-06-14 13:38:10,392 INFO L125 PetriNetUnfolderBase]: For 634696/634696 co-relation queries the response was YES. [2024-06-14 13:38:10,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44301 conditions, 5172 events. 3257/5172 cut-off events. For 634696/634696 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30805 event pairs, 862 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 44152. Up to 4912 conditions per place. [2024-06-14 13:38:10,465 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 27 changer transitions 0/444 dead transitions. [2024-06-14 13:38:10,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 444 transitions, 7076 flow [2024-06-14 13:38:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:38:10,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:38:10,466 INFO L175 Difference]: Start difference. First operand has 312 places, 426 transitions, 6068 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:38:10,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 444 transitions, 7076 flow [2024-06-14 13:38:12,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 444 transitions, 6968 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:12,726 INFO L231 Difference]: Finished difference. Result has 314 places, 428 transitions, 6099 flow [2024-06-14 13:38:12,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6099, PETRI_PLACES=314, PETRI_TRANSITIONS=428} [2024-06-14 13:38:12,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 13:38:12,727 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 428 transitions, 6099 flow [2024-06-14 13:38:12,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:12,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:12,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:12,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:38:12,728 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)] === [2024-06-14 13:38:12,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 887645834, now seen corresponding path program 1 times [2024-06-14 13:38:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:12,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508572933] [2024-06-14 13:38:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:12,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:13,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:13,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508572933] [2024-06-14 13:38:13,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508572933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:13,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:13,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:13,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229100131] [2024-06-14 13:38:13,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:13,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:13,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:13,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:13,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:13,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:13,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 428 transitions, 6099 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:13,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:13,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:13,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:14,850 INFO L124 PetriNetUnfolderBase]: 3273/5189 cut-off events. [2024-06-14 13:38:14,850 INFO L125 PetriNetUnfolderBase]: For 656079/656079 co-relation queries the response was YES. [2024-06-14 13:38:14,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44715 conditions, 5189 events. 3273/5189 cut-off events. For 656079/656079 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 30896 event pairs, 679 based on Foata normal form. 4/5191 useless extension candidates. Maximal degree in co-relation 44565. Up to 4878 conditions per place. [2024-06-14 13:38:14,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 49 changer transitions 0/451 dead transitions. [2024-06-14 13:38:14,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 451 transitions, 7183 flow [2024-06-14 13:38:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:38:14,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 13:38:14,924 INFO L175 Difference]: Start difference. First operand has 314 places, 428 transitions, 6099 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:38:14,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 451 transitions, 7183 flow [2024-06-14 13:38:17,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 451 transitions, 7060 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:17,478 INFO L231 Difference]: Finished difference. Result has 318 places, 434 transitions, 6229 flow [2024-06-14 13:38:17,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6229, PETRI_PLACES=318, PETRI_TRANSITIONS=434} [2024-06-14 13:38:17,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-14 13:38:17,478 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 434 transitions, 6229 flow [2024-06-14 13:38:17,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:17,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:17,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:17,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:38:17,479 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)] === [2024-06-14 13:38:17,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 531334668, now seen corresponding path program 2 times [2024-06-14 13:38:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:17,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238115778] [2024-06-14 13:38:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:18,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:18,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238115778] [2024-06-14 13:38:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238115778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:18,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:18,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:18,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047311308] [2024-06-14 13:38:18,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:18,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:18,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:18,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:18,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 434 transitions, 6229 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:18,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:18,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:18,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:19,542 INFO L124 PetriNetUnfolderBase]: 3361/5324 cut-off events. [2024-06-14 13:38:19,543 INFO L125 PetriNetUnfolderBase]: For 767819/767821 co-relation queries the response was YES. [2024-06-14 13:38:19,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46294 conditions, 5324 events. 3361/5324 cut-off events. For 767819/767821 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31687 event pairs, 712 based on Foata normal form. 24/5345 useless extension candidates. Maximal degree in co-relation 46142. Up to 4414 conditions per place. [2024-06-14 13:38:19,620 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 264 selfloop transitions, 189 changer transitions 0/458 dead transitions. [2024-06-14 13:38:19,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 458 transitions, 7511 flow [2024-06-14 13:38:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:38:19,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 13:38:19,621 INFO L175 Difference]: Start difference. First operand has 318 places, 434 transitions, 6229 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:38:19,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 458 transitions, 7511 flow [2024-06-14 13:38:22,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 458 transitions, 7334 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:22,315 INFO L231 Difference]: Finished difference. Result has 321 places, 437 transitions, 6543 flow [2024-06-14 13:38:22,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6543, PETRI_PLACES=321, PETRI_TRANSITIONS=437} [2024-06-14 13:38:22,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-14 13:38:22,316 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 437 transitions, 6543 flow [2024-06-14 13:38:22,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:22,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:22,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:22,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:38:22,317 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)] === [2024-06-14 13:38:22,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash -451479926, now seen corresponding path program 3 times [2024-06-14 13:38:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:22,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039078269] [2024-06-14 13:38:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:23,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:23,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039078269] [2024-06-14 13:38:23,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039078269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:23,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:23,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:23,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015941256] [2024-06-14 13:38:23,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:23,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:23,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:23,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:23,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:23,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 437 transitions, 6543 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:23,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:23,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:23,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:24,471 INFO L124 PetriNetUnfolderBase]: 3377/5350 cut-off events. [2024-06-14 13:38:24,472 INFO L125 PetriNetUnfolderBase]: For 696696/696700 co-relation queries the response was YES. [2024-06-14 13:38:24,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47312 conditions, 5350 events. 3377/5350 cut-off events. For 696696/696700 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 31958 event pairs, 709 based on Foata normal form. 8/5355 useless extension candidates. Maximal degree in co-relation 47159. Up to 4944 conditions per place. [2024-06-14 13:38:24,547 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 361 selfloop transitions, 96 changer transitions 0/462 dead transitions. [2024-06-14 13:38:24,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 462 transitions, 7747 flow [2024-06-14 13:38:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:38:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:38:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 13:38:24,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-14 13:38:24,548 INFO L175 Difference]: Start difference. First operand has 321 places, 437 transitions, 6543 flow. Second operand 10 states and 163 transitions. [2024-06-14 13:38:24,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 462 transitions, 7747 flow [2024-06-14 13:38:27,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 462 transitions, 7249 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:27,401 INFO L231 Difference]: Finished difference. Result has 326 places, 448 transitions, 6542 flow [2024-06-14 13:38:27,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6542, PETRI_PLACES=326, PETRI_TRANSITIONS=448} [2024-06-14 13:38:27,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-14 13:38:27,402 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 448 transitions, 6542 flow [2024-06-14 13:38:27,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:27,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:27,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:27,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:38:27,402 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)] === [2024-06-14 13:38:27,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:27,403 INFO L85 PathProgramCache]: Analyzing trace with hash -451183256, now seen corresponding path program 4 times [2024-06-14 13:38:27,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:27,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712586939] [2024-06-14 13:38:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:28,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712586939] [2024-06-14 13:38:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712586939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:28,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:28,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820337306] [2024-06-14 13:38:28,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:28,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:28,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:28,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:28,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 448 transitions, 6542 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:28,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:28,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:29,585 INFO L124 PetriNetUnfolderBase]: 3406/5409 cut-off events. [2024-06-14 13:38:29,586 INFO L125 PetriNetUnfolderBase]: For 715298/715302 co-relation queries the response was YES. [2024-06-14 13:38:29,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47443 conditions, 5409 events. 3406/5409 cut-off events. For 715298/715302 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32456 event pairs, 698 based on Foata normal form. 8/5414 useless extension candidates. Maximal degree in co-relation 47287. Up to 4929 conditions per place. [2024-06-14 13:38:29,666 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 105 changer transitions 0/470 dead transitions. [2024-06-14 13:38:29,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 470 transitions, 7944 flow [2024-06-14 13:38:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:38:29,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 13:38:29,667 INFO L175 Difference]: Start difference. First operand has 326 places, 448 transitions, 6542 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:38:29,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 470 transitions, 7944 flow [2024-06-14 13:38:32,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 470 transitions, 7549 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-14 13:38:32,720 INFO L231 Difference]: Finished difference. Result has 328 places, 455 transitions, 6626 flow [2024-06-14 13:38:32,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6626, PETRI_PLACES=328, PETRI_TRANSITIONS=455} [2024-06-14 13:38:32,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-14 13:38:32,721 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 455 transitions, 6626 flow [2024-06-14 13:38:32,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:32,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:32,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:32,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:38:32,722 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)] === [2024-06-14 13:38:32,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash -687839984, now seen corresponding path program 4 times [2024-06-14 13:38:32,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:32,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284304628] [2024-06-14 13:38:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:32,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:33,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284304628] [2024-06-14 13:38:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284304628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:33,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:33,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:33,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557129986] [2024-06-14 13:38:33,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:33,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:33,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:33,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:33,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:33,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:33,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 455 transitions, 6626 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:33,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:33,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:33,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:35,024 INFO L124 PetriNetUnfolderBase]: 3401/5394 cut-off events. [2024-06-14 13:38:35,025 INFO L125 PetriNetUnfolderBase]: For 711335/711337 co-relation queries the response was YES. [2024-06-14 13:38:35,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47194 conditions, 5394 events. 3401/5394 cut-off events. For 711335/711337 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32376 event pairs, 892 based on Foata normal form. 2/5395 useless extension candidates. Maximal degree in co-relation 47036. Up to 5120 conditions per place. [2024-06-14 13:38:35,093 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 431 selfloop transitions, 34 changer transitions 0/470 dead transitions. [2024-06-14 13:38:35,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 470 transitions, 7684 flow [2024-06-14 13:38:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:38:35,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 13:38:35,094 INFO L175 Difference]: Start difference. First operand has 328 places, 455 transitions, 6626 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:38:35,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 470 transitions, 7684 flow [2024-06-14 13:38:37,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 470 transitions, 7429 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:37,189 INFO L231 Difference]: Finished difference. Result has 331 places, 457 transitions, 6536 flow [2024-06-14 13:38:37,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6536, PETRI_PLACES=331, PETRI_TRANSITIONS=457} [2024-06-14 13:38:37,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-14 13:38:37,190 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 457 transitions, 6536 flow [2024-06-14 13:38:37,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:37,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:37,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:37,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:38:37,190 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)] === [2024-06-14 13:38:37,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -687655286, now seen corresponding path program 5 times [2024-06-14 13:38:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261649329] [2024-06-14 13:38:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:38,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261649329] [2024-06-14 13:38:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261649329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:38,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:38,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:38,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114257195] [2024-06-14 13:38:38,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:38,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:38,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:38,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:38,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 457 transitions, 6536 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:38,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:38,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:38,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:39,441 INFO L124 PetriNetUnfolderBase]: 3391/5375 cut-off events. [2024-06-14 13:38:39,441 INFO L125 PetriNetUnfolderBase]: For 710498/710502 co-relation queries the response was YES. [2024-06-14 13:38:39,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46508 conditions, 5375 events. 3391/5375 cut-off events. For 710498/710502 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32180 event pairs, 711 based on Foata normal form. 8/5380 useless extension candidates. Maximal degree in co-relation 46348. Up to 5002 conditions per place. [2024-06-14 13:38:39,516 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 396 selfloop transitions, 70 changer transitions 0/471 dead transitions. [2024-06-14 13:38:39,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 471 transitions, 7523 flow [2024-06-14 13:38:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:38:39,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 13:38:39,519 INFO L175 Difference]: Start difference. First operand has 331 places, 457 transitions, 6536 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:38:39,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 471 transitions, 7523 flow [2024-06-14 13:38:42,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 471 transitions, 7306 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:42,716 INFO L231 Difference]: Finished difference. Result has 334 places, 458 transitions, 6482 flow [2024-06-14 13:38:42,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6482, PETRI_PLACES=334, PETRI_TRANSITIONS=458} [2024-06-14 13:38:42,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-14 13:38:42,717 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 458 transitions, 6482 flow [2024-06-14 13:38:42,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:42,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:42,718 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] [2024-06-14 13:38:42,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:38:42,718 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)] === [2024-06-14 13:38:42,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash 607074186, now seen corresponding path program 1 times [2024-06-14 13:38:42,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:42,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083174556] [2024-06-14 13:38:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:42,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:43,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:43,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083174556] [2024-06-14 13:38:43,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083174556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:43,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:43,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:43,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137811420] [2024-06-14 13:38:43,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:43,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:43,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:43,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 458 transitions, 6482 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:38:43,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:43,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:43,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:44,555 INFO L124 PetriNetUnfolderBase]: 3396/5394 cut-off events. [2024-06-14 13:38:44,556 INFO L125 PetriNetUnfolderBase]: For 706392/706392 co-relation queries the response was YES. [2024-06-14 13:38:44,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46552 conditions, 5394 events. 3396/5394 cut-off events. For 706392/706392 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32387 event pairs, 691 based on Foata normal form. 1/5394 useless extension candidates. Maximal degree in co-relation 46391. Up to 5103 conditions per place. [2024-06-14 13:38:44,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 451 selfloop transitions, 30 changer transitions 0/486 dead transitions. [2024-06-14 13:38:44,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 486 transitions, 7625 flow [2024-06-14 13:38:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:38:44,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:38:44,635 INFO L175 Difference]: Start difference. First operand has 334 places, 458 transitions, 6482 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:38:44,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 486 transitions, 7625 flow [2024-06-14 13:38:47,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 486 transitions, 7474 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:47,205 INFO L231 Difference]: Finished difference. Result has 336 places, 461 transitions, 6491 flow [2024-06-14 13:38:47,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6491, PETRI_PLACES=336, PETRI_TRANSITIONS=461} [2024-06-14 13:38:47,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-14 13:38:47,206 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 461 transitions, 6491 flow [2024-06-14 13:38:47,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:38:47,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:47,206 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] [2024-06-14 13:38:47,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:38:47,206 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)] === [2024-06-14 13:38:47,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1733717548, now seen corresponding path program 2 times [2024-06-14 13:38:47,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:47,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145048748] [2024-06-14 13:38:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:47,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:47,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145048748] [2024-06-14 13:38:47,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145048748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:47,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:47,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:47,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837589850] [2024-06-14 13:38:47,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:47,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:47,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:47,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:47,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:47,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:47,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 461 transitions, 6491 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:38:47,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:47,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:47,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:49,114 INFO L124 PetriNetUnfolderBase]: 3406/5408 cut-off events. [2024-06-14 13:38:49,114 INFO L125 PetriNetUnfolderBase]: For 720515/720515 co-relation queries the response was YES. [2024-06-14 13:38:49,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46986 conditions, 5408 events. 3406/5408 cut-off events. For 720515/720515 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 32430 event pairs, 691 based on Foata normal form. 1/5408 useless extension candidates. Maximal degree in co-relation 46824. Up to 5109 conditions per place. [2024-06-14 13:38:49,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 452 selfloop transitions, 36 changer transitions 0/493 dead transitions. [2024-06-14 13:38:49,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 493 transitions, 7683 flow [2024-06-14 13:38:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:38:49,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 13:38:49,196 INFO L175 Difference]: Start difference. First operand has 336 places, 461 transitions, 6491 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:38:49,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 493 transitions, 7683 flow [2024-06-14 13:38:51,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 493 transitions, 7549 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:51,791 INFO L231 Difference]: Finished difference. Result has 340 places, 467 transitions, 6577 flow [2024-06-14 13:38:51,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6357, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6577, PETRI_PLACES=340, PETRI_TRANSITIONS=467} [2024-06-14 13:38:51,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-14 13:38:51,792 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 467 transitions, 6577 flow [2024-06-14 13:38:51,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:38:51,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:51,792 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] [2024-06-14 13:38:51,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:38:51,793 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)] === [2024-06-14 13:38:51,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1308042472, now seen corresponding path program 3 times [2024-06-14 13:38:51,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:51,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975106966] [2024-06-14 13:38:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:51,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:52,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:52,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975106966] [2024-06-14 13:38:52,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975106966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:52,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:52,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587323379] [2024-06-14 13:38:52,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:52,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:52,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:52,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:52,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 467 transitions, 6577 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:38:52,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:52,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:52,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:53,810 INFO L124 PetriNetUnfolderBase]: 3411/5416 cut-off events. [2024-06-14 13:38:53,810 INFO L125 PetriNetUnfolderBase]: For 734245/734249 co-relation queries the response was YES. [2024-06-14 13:38:53,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47494 conditions, 5416 events. 3411/5416 cut-off events. For 734245/734249 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 32525 event pairs, 688 based on Foata normal form. 5/5420 useless extension candidates. Maximal degree in co-relation 47330. Up to 5059 conditions per place. [2024-06-14 13:38:53,915 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 443 selfloop transitions, 46 changer transitions 0/494 dead transitions. [2024-06-14 13:38:53,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 494 transitions, 7748 flow [2024-06-14 13:38:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:38:53,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:38:53,917 INFO L175 Difference]: Start difference. First operand has 340 places, 467 transitions, 6577 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:38:53,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 494 transitions, 7748 flow [2024-06-14 13:38:57,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 494 transitions, 7601 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:57,643 INFO L231 Difference]: Finished difference. Result has 342 places, 470 transitions, 6632 flow [2024-06-14 13:38:57,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6632, PETRI_PLACES=342, PETRI_TRANSITIONS=470} [2024-06-14 13:38:57,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-14 13:38:57,643 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 470 transitions, 6632 flow [2024-06-14 13:38:57,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:38:57,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:57,644 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] [2024-06-14 13:38:57,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:38:57,644 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)] === [2024-06-14 13:38:57,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash -251480688, now seen corresponding path program 4 times [2024-06-14 13:38:57,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:57,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661755097] [2024-06-14 13:38:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:57,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:58,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:58,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661755097] [2024-06-14 13:38:58,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661755097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:58,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:58,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:58,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120413017] [2024-06-14 13:38:58,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:58,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:58,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:58,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:58,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:58,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:38:58,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 470 transitions, 6632 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:38:58,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:58,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:38:58,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:59,564 INFO L124 PetriNetUnfolderBase]: 3416/5423 cut-off events. [2024-06-14 13:38:59,565 INFO L125 PetriNetUnfolderBase]: For 751819/751823 co-relation queries the response was YES. [2024-06-14 13:38:59,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48021 conditions, 5423 events. 3416/5423 cut-off events. For 751819/751823 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32570 event pairs, 684 based on Foata normal form. 5/5427 useless extension candidates. Maximal degree in co-relation 47856. Up to 5049 conditions per place. [2024-06-14 13:38:59,646 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 437 selfloop transitions, 52 changer transitions 0/494 dead transitions. [2024-06-14 13:38:59,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 494 transitions, 7795 flow [2024-06-14 13:38:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:38:59,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 13:38:59,647 INFO L175 Difference]: Start difference. First operand has 342 places, 470 transitions, 6632 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:38:59,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 494 transitions, 7795 flow [2024-06-14 13:39:03,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 494 transitions, 7615 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:03,332 INFO L231 Difference]: Finished difference. Result has 344 places, 473 transitions, 6672 flow [2024-06-14 13:39:03,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6452, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6672, PETRI_PLACES=344, PETRI_TRANSITIONS=473} [2024-06-14 13:39:03,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-14 13:39:03,333 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 473 transitions, 6672 flow [2024-06-14 13:39:03,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:03,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:03,333 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] [2024-06-14 13:39:03,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:39:03,333 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)] === [2024-06-14 13:39:03,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:03,334 INFO L85 PathProgramCache]: Analyzing trace with hash 657300112, now seen corresponding path program 5 times [2024-06-14 13:39:03,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:03,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791326068] [2024-06-14 13:39:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:03,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:04,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:04,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791326068] [2024-06-14 13:39:04,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791326068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:04,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:04,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952596049] [2024-06-14 13:39:04,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:04,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:04,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:04,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 473 transitions, 6672 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:04,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:04,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:04,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:05,332 INFO L124 PetriNetUnfolderBase]: 3421/5431 cut-off events. [2024-06-14 13:39:05,332 INFO L125 PetriNetUnfolderBase]: For 767196/767196 co-relation queries the response was YES. [2024-06-14 13:39:05,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48499 conditions, 5431 events. 3421/5431 cut-off events. For 767196/767196 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32619 event pairs, 694 based on Foata normal form. 1/5431 useless extension candidates. Maximal degree in co-relation 48333. Up to 5149 conditions per place. [2024-06-14 13:39:05,421 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 28 changer transitions 0/492 dead transitions. [2024-06-14 13:39:05,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 492 transitions, 7812 flow [2024-06-14 13:39:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:39:05,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:39:05,423 INFO L175 Difference]: Start difference. First operand has 344 places, 473 transitions, 6672 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:39:05,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 492 transitions, 7812 flow [2024-06-14 13:39:09,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 492 transitions, 7614 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:09,143 INFO L231 Difference]: Finished difference. Result has 346 places, 476 transitions, 6652 flow [2024-06-14 13:39:09,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6652, PETRI_PLACES=346, PETRI_TRANSITIONS=476} [2024-06-14 13:39:09,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-14 13:39:09,144 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 476 transitions, 6652 flow [2024-06-14 13:39:09,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:09,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:09,144 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] [2024-06-14 13:39:09,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:39:09,144 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)] === [2024-06-14 13:39:09,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash 662061712, now seen corresponding path program 6 times [2024-06-14 13:39:09,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:09,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073607946] [2024-06-14 13:39:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:09,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:09,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:09,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073607946] [2024-06-14 13:39:09,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073607946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:09,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:09,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:09,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383879619] [2024-06-14 13:39:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:09,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:09,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:09,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:09,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:09,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 476 transitions, 6652 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:09,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:09,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:09,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:11,050 INFO L124 PetriNetUnfolderBase]: 3434/5451 cut-off events. [2024-06-14 13:39:11,050 INFO L125 PetriNetUnfolderBase]: For 789466/789470 co-relation queries the response was YES. [2024-06-14 13:39:11,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49170 conditions, 5451 events. 3434/5451 cut-off events. For 789466/789470 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32760 event pairs, 688 based on Foata normal form. 5/5455 useless extension candidates. Maximal degree in co-relation 49003. Up to 5038 conditions per place. [2024-06-14 13:39:11,134 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 423 selfloop transitions, 72 changer transitions 0/500 dead transitions. [2024-06-14 13:39:11,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 500 transitions, 8145 flow [2024-06-14 13:39:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:39:11,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 13:39:11,136 INFO L175 Difference]: Start difference. First operand has 346 places, 476 transitions, 6652 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:39:11,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 500 transitions, 8145 flow [2024-06-14 13:39:14,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 500 transitions, 7968 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:14,549 INFO L231 Difference]: Finished difference. Result has 348 places, 482 transitions, 6863 flow [2024-06-14 13:39:14,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6475, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6863, PETRI_PLACES=348, PETRI_TRANSITIONS=482} [2024-06-14 13:39:14,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 13:39:14,550 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 482 transitions, 6863 flow [2024-06-14 13:39:14,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:14,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:14,550 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] [2024-06-14 13:39:14,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:39:14,550 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)] === [2024-06-14 13:39:14,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:14,551 INFO L85 PathProgramCache]: Analyzing trace with hash -20166328, now seen corresponding path program 1 times [2024-06-14 13:39:14,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:14,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897730223] [2024-06-14 13:39:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:14,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897730223] [2024-06-14 13:39:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897730223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:15,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001682905] [2024-06-14 13:39:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:15,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:15,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:15,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:15,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 482 transitions, 6863 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:15,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:15,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:16,564 INFO L124 PetriNetUnfolderBase]: 3486/5538 cut-off events. [2024-06-14 13:39:16,564 INFO L125 PetriNetUnfolderBase]: For 813470/813470 co-relation queries the response was YES. [2024-06-14 13:39:16,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50229 conditions, 5538 events. 3486/5538 cut-off events. For 813470/813470 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33391 event pairs, 693 based on Foata normal form. 2/5537 useless extension candidates. Maximal degree in co-relation 50062. Up to 5218 conditions per place. [2024-06-14 13:39:16,650 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 33 changer transitions 0/520 dead transitions. [2024-06-14 13:39:16,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 520 transitions, 8210 flow [2024-06-14 13:39:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:39:16,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 13:39:16,652 INFO L175 Difference]: Start difference. First operand has 348 places, 482 transitions, 6863 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:39:16,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 520 transitions, 8210 flow [2024-06-14 13:39:20,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 520 transitions, 8026 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:20,174 INFO L231 Difference]: Finished difference. Result has 355 places, 496 transitions, 7005 flow [2024-06-14 13:39:20,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6685, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7005, PETRI_PLACES=355, PETRI_TRANSITIONS=496} [2024-06-14 13:39:20,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 13:39:20,175 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 496 transitions, 7005 flow [2024-06-14 13:39:20,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:20,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:20,175 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] [2024-06-14 13:39:20,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:39:20,175 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)] === [2024-06-14 13:39:20,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1845022704, now seen corresponding path program 2 times [2024-06-14 13:39:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:20,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882585267] [2024-06-14 13:39:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:20,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:20,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882585267] [2024-06-14 13:39:20,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882585267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:20,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:20,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:20,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649941248] [2024-06-14 13:39:20,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:20,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:20,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:20,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:20,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:20,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:20,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 496 transitions, 7005 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:20,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:20,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:20,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:22,212 INFO L124 PetriNetUnfolderBase]: 3494/5555 cut-off events. [2024-06-14 13:39:22,212 INFO L125 PetriNetUnfolderBase]: For 825834/825834 co-relation queries the response was YES. [2024-06-14 13:39:22,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 5555 events. 3494/5555 cut-off events. For 825834/825834 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33475 event pairs, 702 based on Foata normal form. 2/5556 useless extension candidates. Maximal degree in co-relation 50478. Up to 5248 conditions per place. [2024-06-14 13:39:22,319 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 481 selfloop transitions, 34 changer transitions 0/520 dead transitions. [2024-06-14 13:39:22,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 520 transitions, 8183 flow [2024-06-14 13:39:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:39:22,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 13:39:22,320 INFO L175 Difference]: Start difference. First operand has 355 places, 496 transitions, 7005 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:39:22,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 520 transitions, 8183 flow [2024-06-14 13:39:26,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 520 transitions, 8036 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 13:39:26,586 INFO L231 Difference]: Finished difference. Result has 360 places, 498 transitions, 7005 flow [2024-06-14 13:39:26,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7005, PETRI_PLACES=360, PETRI_TRANSITIONS=498} [2024-06-14 13:39:26,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-14 13:39:26,586 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 498 transitions, 7005 flow [2024-06-14 13:39:26,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:26,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:26,587 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] [2024-06-14 13:39:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:39:26,587 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)] === [2024-06-14 13:39:26,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2107646002, now seen corresponding path program 3 times [2024-06-14 13:39:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651482852] [2024-06-14 13:39:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:27,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:27,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651482852] [2024-06-14 13:39:27,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651482852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:27,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:27,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:27,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134607074] [2024-06-14 13:39:27,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:27,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:27,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:27,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:27,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:27,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:27,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 498 transitions, 7005 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:27,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:27,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:27,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:28,713 INFO L124 PetriNetUnfolderBase]: 3489/5543 cut-off events. [2024-06-14 13:39:28,713 INFO L125 PetriNetUnfolderBase]: For 829909/829909 co-relation queries the response was YES. [2024-06-14 13:39:28,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50486 conditions, 5543 events. 3489/5543 cut-off events. For 829909/829909 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33326 event pairs, 695 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 50313. Up to 5231 conditions per place. [2024-06-14 13:39:28,801 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 476 selfloop transitions, 36 changer transitions 0/517 dead transitions. [2024-06-14 13:39:28,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 517 transitions, 8161 flow [2024-06-14 13:39:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:39:28,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:39:28,802 INFO L175 Difference]: Start difference. First operand has 360 places, 498 transitions, 7005 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:39:28,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 517 transitions, 8161 flow [2024-06-14 13:39:34,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 517 transitions, 8026 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:34,077 INFO L231 Difference]: Finished difference. Result has 362 places, 500 transitions, 7025 flow [2024-06-14 13:39:34,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6870, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7025, PETRI_PLACES=362, PETRI_TRANSITIONS=500} [2024-06-14 13:39:34,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-14 13:39:34,078 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 500 transitions, 7025 flow [2024-06-14 13:39:34,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:34,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:34,079 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] [2024-06-14 13:39:34,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:39:34,079 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)] === [2024-06-14 13:39:34,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:34,080 INFO L85 PathProgramCache]: Analyzing trace with hash -501351672, now seen corresponding path program 1 times [2024-06-14 13:39:34,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:34,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945737874] [2024-06-14 13:39:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:34,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:34,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:34,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945737874] [2024-06-14 13:39:34,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945737874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:34,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:34,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:34,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051865023] [2024-06-14 13:39:34,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:34,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:34,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:34,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:34,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:35,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:35,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 500 transitions, 7025 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:35,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:35,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:35,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:36,781 INFO L124 PetriNetUnfolderBase]: 3486/5543 cut-off events. [2024-06-14 13:39:36,781 INFO L125 PetriNetUnfolderBase]: For 831106/831108 co-relation queries the response was YES. [2024-06-14 13:39:36,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50425 conditions, 5543 events. 3486/5543 cut-off events. For 831106/831108 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33392 event pairs, 711 based on Foata normal form. 1/5543 useless extension candidates. Maximal degree in co-relation 50251. Up to 5106 conditions per place. [2024-06-14 13:39:36,863 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 75 changer transitions 0/524 dead transitions. [2024-06-14 13:39:36,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 524 transitions, 8157 flow [2024-06-14 13:39:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:39:36,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 13:39:36,865 INFO L175 Difference]: Start difference. First operand has 362 places, 500 transitions, 7025 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:39:36,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 524 transitions, 8157 flow [2024-06-14 13:39:42,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 524 transitions, 8000 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:42,349 INFO L231 Difference]: Finished difference. Result has 364 places, 500 transitions, 7032 flow [2024-06-14 13:39:42,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6868, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7032, PETRI_PLACES=364, PETRI_TRANSITIONS=500} [2024-06-14 13:39:42,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-14 13:39:42,350 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 500 transitions, 7032 flow [2024-06-14 13:39:42,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:42,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:42,351 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] [2024-06-14 13:39:42,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:39:42,351 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)] === [2024-06-14 13:39:42,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:42,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1491850822, now seen corresponding path program 7 times [2024-06-14 13:39:42,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:42,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780806829] [2024-06-14 13:39:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:42,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:43,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780806829] [2024-06-14 13:39:43,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780806829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:43,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:43,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:43,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094633994] [2024-06-14 13:39:43,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:43,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:43,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:43,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:43,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:43,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:43,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 500 transitions, 7032 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:43,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:43,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:43,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:44,434 INFO L124 PetriNetUnfolderBase]: 3491/5542 cut-off events. [2024-06-14 13:39:44,434 INFO L125 PetriNetUnfolderBase]: For 846986/846986 co-relation queries the response was YES. [2024-06-14 13:39:44,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50666 conditions, 5542 events. 3491/5542 cut-off events. For 846986/846986 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33424 event pairs, 683 based on Foata normal form. 1/5538 useless extension candidates. Maximal degree in co-relation 50491. Up to 5156 conditions per place. [2024-06-14 13:39:44,518 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 53 changer transitions 0/525 dead transitions. [2024-06-14 13:39:44,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 525 transitions, 8265 flow [2024-06-14 13:39:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:39:44,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 13:39:44,519 INFO L175 Difference]: Start difference. First operand has 364 places, 500 transitions, 7032 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:39:44,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 525 transitions, 8265 flow [2024-06-14 13:39:48,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 525 transitions, 8112 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:39:48,387 INFO L231 Difference]: Finished difference. Result has 365 places, 503 transitions, 7103 flow [2024-06-14 13:39:48,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6879, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7103, PETRI_PLACES=365, PETRI_TRANSITIONS=503} [2024-06-14 13:39:48,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-14 13:39:48,388 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 503 transitions, 7103 flow [2024-06-14 13:39:48,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:48,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:48,388 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] [2024-06-14 13:39:48,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:39:48,388 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)] === [2024-06-14 13:39:48,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash -527876282, now seen corresponding path program 8 times [2024-06-14 13:39:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:48,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492901357] [2024-06-14 13:39:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:49,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:49,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492901357] [2024-06-14 13:39:49,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492901357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:49,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:49,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:49,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205131897] [2024-06-14 13:39:49,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:49,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:49,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:49,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:49,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:49,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 503 transitions, 7103 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:49,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:49,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:49,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:51,000 INFO L124 PetriNetUnfolderBase]: 3488/5538 cut-off events. [2024-06-14 13:39:51,000 INFO L125 PetriNetUnfolderBase]: For 840720/840720 co-relation queries the response was YES. [2024-06-14 13:39:51,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50449 conditions, 5538 events. 3488/5538 cut-off events. For 840720/840720 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33351 event pairs, 690 based on Foata normal form. 1/5534 useless extension candidates. Maximal degree in co-relation 50274. Up to 5144 conditions per place. [2024-06-14 13:39:51,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 57 changer transitions 0/523 dead transitions. [2024-06-14 13:39:51,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 523 transitions, 8220 flow [2024-06-14 13:39:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:39:51,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 13:39:51,134 INFO L175 Difference]: Start difference. First operand has 365 places, 503 transitions, 7103 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:39:51,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 523 transitions, 8220 flow [2024-06-14 13:39:54,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 523 transitions, 7964 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:54,246 INFO L231 Difference]: Finished difference. Result has 367 places, 503 transitions, 6967 flow [2024-06-14 13:39:54,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6967, PETRI_PLACES=367, PETRI_TRANSITIONS=503} [2024-06-14 13:39:54,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-14 13:39:54,247 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 503 transitions, 6967 flow [2024-06-14 13:39:54,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:54,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:54,247 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] [2024-06-14 13:39:54,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:39:54,248 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)] === [2024-06-14 13:39:54,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1732903790, now seen corresponding path program 9 times [2024-06-14 13:39:54,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:54,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620058293] [2024-06-14 13:39:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:54,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:54,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:54,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620058293] [2024-06-14 13:39:54,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620058293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:54,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:54,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:54,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204322127] [2024-06-14 13:39:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:54,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:54,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:55,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:39:55,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 503 transitions, 6967 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:39:55,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:55,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:39:55,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:56,477 INFO L124 PetriNetUnfolderBase]: 3506/5565 cut-off events. [2024-06-14 13:39:56,477 INFO L125 PetriNetUnfolderBase]: For 867864/867864 co-relation queries the response was YES. [2024-06-14 13:39:56,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50940 conditions, 5565 events. 3506/5565 cut-off events. For 867864/867864 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 33554 event pairs, 687 based on Foata normal form. 2/5562 useless extension candidates. Maximal degree in co-relation 50764. Up to 5108 conditions per place. [2024-06-14 13:39:56,586 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 447 selfloop transitions, 75 changer transitions 0/527 dead transitions. [2024-06-14 13:39:56,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 527 transitions, 8530 flow [2024-06-14 13:39:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:39:56,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 13:39:56,587 INFO L175 Difference]: Start difference. First operand has 367 places, 503 transitions, 6967 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:39:56,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 527 transitions, 8530 flow [2024-06-14 13:40:01,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 527 transitions, 8336 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:40:01,466 INFO L231 Difference]: Finished difference. Result has 368 places, 510 transitions, 7174 flow [2024-06-14 13:40:01,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6773, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7174, PETRI_PLACES=368, PETRI_TRANSITIONS=510} [2024-06-14 13:40:01,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-14 13:40:01,467 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 510 transitions, 7174 flow [2024-06-14 13:40:01,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:40:01,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:01,467 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] [2024-06-14 13:40:01,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:40:01,468 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)] === [2024-06-14 13:40:01,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 537135292, now seen corresponding path program 10 times [2024-06-14 13:40:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853974525] [2024-06-14 13:40:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:02,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:02,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853974525] [2024-06-14 13:40:02,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853974525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:02,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:02,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851167449] [2024-06-14 13:40:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:02,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:02,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:02,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 510 transitions, 7174 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:40:02,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:02,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:02,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:03,491 INFO L124 PetriNetUnfolderBase]: 3516/5580 cut-off events. [2024-06-14 13:40:03,491 INFO L125 PetriNetUnfolderBase]: For 888368/888372 co-relation queries the response was YES. [2024-06-14 13:40:03,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51680 conditions, 5580 events. 3516/5580 cut-off events. For 888368/888372 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33652 event pairs, 712 based on Foata normal form. 6/5580 useless extension candidates. Maximal degree in co-relation 51503. Up to 4991 conditions per place. [2024-06-14 13:40:03,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 106 changer transitions 0/532 dead transitions. [2024-06-14 13:40:03,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 532 transitions, 9021 flow [2024-06-14 13:40:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:03,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:40:03,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 13:40:03,589 INFO L175 Difference]: Start difference. First operand has 368 places, 510 transitions, 7174 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:40:03,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 532 transitions, 9021 flow [2024-06-14 13:40:08,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 532 transitions, 8803 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:08,355 INFO L231 Difference]: Finished difference. Result has 372 places, 517 transitions, 7433 flow [2024-06-14 13:40:08,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6956, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7433, PETRI_PLACES=372, PETRI_TRANSITIONS=517} [2024-06-14 13:40:08,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-14 13:40:08,356 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 517 transitions, 7433 flow [2024-06-14 13:40:08,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:40:08,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:08,356 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] [2024-06-14 13:40:08,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:40:08,357 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)] === [2024-06-14 13:40:08,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash 874852812, now seen corresponding path program 11 times [2024-06-14 13:40:08,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:08,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251947215] [2024-06-14 13:40:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:09,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:09,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251947215] [2024-06-14 13:40:09,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251947215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:09,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:09,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:09,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420863766] [2024-06-14 13:40:09,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:09,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:09,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:09,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:09,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 517 transitions, 7433 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:40:09,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:09,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:09,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:10,494 INFO L124 PetriNetUnfolderBase]: 3534/5607 cut-off events. [2024-06-14 13:40:10,494 INFO L125 PetriNetUnfolderBase]: For 913992/913996 co-relation queries the response was YES. [2024-06-14 13:40:10,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52763 conditions, 5607 events. 3534/5607 cut-off events. For 913992/913996 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33865 event pairs, 712 based on Foata normal form. 6/5607 useless extension candidates. Maximal degree in co-relation 52584. Up to 5010 conditions per place. [2024-06-14 13:40:10,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 117 changer transitions 0/539 dead transitions. [2024-06-14 13:40:10,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 539 transitions, 9314 flow [2024-06-14 13:40:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:40:10,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:40:10,592 INFO L175 Difference]: Start difference. First operand has 372 places, 517 transitions, 7433 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:40:10,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 539 transitions, 9314 flow [2024-06-14 13:40:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 539 transitions, 8931 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-14 13:40:14,422 INFO L231 Difference]: Finished difference. Result has 375 places, 525 transitions, 7613 flow [2024-06-14 13:40:14,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7613, PETRI_PLACES=375, PETRI_TRANSITIONS=525} [2024-06-14 13:40:14,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-14 13:40:14,423 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 525 transitions, 7613 flow [2024-06-14 13:40:14,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:40:14,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:14,426 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] [2024-06-14 13:40:14,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:40:14,427 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)] === [2024-06-14 13:40:14,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1262169178, now seen corresponding path program 12 times [2024-06-14 13:40:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070971226] [2024-06-14 13:40:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:15,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070971226] [2024-06-14 13:40:15,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070971226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:15,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:15,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109628027] [2024-06-14 13:40:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:15,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:15,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:15,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:15,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:15,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 525 transitions, 7613 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:40:15,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:15,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:15,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:16,735 INFO L124 PetriNetUnfolderBase]: 3528/5605 cut-off events. [2024-06-14 13:40:16,735 INFO L125 PetriNetUnfolderBase]: For 909844/909844 co-relation queries the response was YES. [2024-06-14 13:40:16,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52095 conditions, 5605 events. 3528/5605 cut-off events. For 909844/909844 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33898 event pairs, 704 based on Foata normal form. 2/5602 useless extension candidates. Maximal degree in co-relation 51915. Up to 5254 conditions per place. [2024-06-14 13:40:16,813 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 483 selfloop transitions, 48 changer transitions 0/536 dead transitions. [2024-06-14 13:40:16,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 536 transitions, 8711 flow [2024-06-14 13:40:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:40:16,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:40:16,814 INFO L175 Difference]: Start difference. First operand has 375 places, 525 transitions, 7613 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:40:16,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 536 transitions, 8711 flow [2024-06-14 13:40:20,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 536 transitions, 8385 flow, removed 116 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:20,784 INFO L231 Difference]: Finished difference. Result has 379 places, 525 transitions, 7390 flow [2024-06-14 13:40:20,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7287, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7390, PETRI_PLACES=379, PETRI_TRANSITIONS=525} [2024-06-14 13:40:20,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-14 13:40:20,785 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 525 transitions, 7390 flow [2024-06-14 13:40:20,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:40:20,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:20,786 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] [2024-06-14 13:40:20,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:40:20,787 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)] === [2024-06-14 13:40:20,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash -531592128, now seen corresponding path program 2 times [2024-06-14 13:40:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:20,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164863983] [2024-06-14 13:40:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:21,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:21,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164863983] [2024-06-14 13:40:21,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164863983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:21,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:21,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104569668] [2024-06-14 13:40:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:21,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:21,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:21,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:21,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 525 transitions, 7390 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:21,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:21,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:21,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:23,287 INFO L124 PetriNetUnfolderBase]: 3533/5615 cut-off events. [2024-06-14 13:40:23,288 INFO L125 PetriNetUnfolderBase]: For 912637/912637 co-relation queries the response was YES. [2024-06-14 13:40:23,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51972 conditions, 5615 events. 3533/5615 cut-off events. For 912637/912637 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33899 event pairs, 698 based on Foata normal form. 1/5613 useless extension candidates. Maximal degree in co-relation 51791. Up to 5176 conditions per place. [2024-06-14 13:40:23,402 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 73 changer transitions 0/549 dead transitions. [2024-06-14 13:40:23,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 549 transitions, 8630 flow [2024-06-14 13:40:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:40:23,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 13:40:23,404 INFO L175 Difference]: Start difference. First operand has 379 places, 525 transitions, 7390 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:40:23,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 549 transitions, 8630 flow [2024-06-14 13:40:27,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 549 transitions, 8415 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 13:40:27,910 INFO L231 Difference]: Finished difference. Result has 378 places, 528 transitions, 7413 flow [2024-06-14 13:40:27,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7175, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7413, PETRI_PLACES=378, PETRI_TRANSITIONS=528} [2024-06-14 13:40:27,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 13:40:27,910 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 528 transitions, 7413 flow [2024-06-14 13:40:27,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:27,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:27,911 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] [2024-06-14 13:40:27,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:40:27,911 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)] === [2024-06-14 13:40:27,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:27,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1812609252, now seen corresponding path program 3 times [2024-06-14 13:40:27,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:27,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775727872] [2024-06-14 13:40:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:27,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:28,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:28,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775727872] [2024-06-14 13:40:28,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775727872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:28,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:28,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476127792] [2024-06-14 13:40:28,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:28,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:28,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:28,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:28,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:28,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 528 transitions, 7413 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:28,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:28,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:28,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:30,344 INFO L124 PetriNetUnfolderBase]: 3530/5610 cut-off events. [2024-06-14 13:40:30,344 INFO L125 PetriNetUnfolderBase]: For 920989/920989 co-relation queries the response was YES. [2024-06-14 13:40:30,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51885 conditions, 5610 events. 3530/5610 cut-off events. For 920989/920989 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33882 event pairs, 692 based on Foata normal form. 1/5608 useless extension candidates. Maximal degree in co-relation 51705. Up to 5172 conditions per place. [2024-06-14 13:40:30,472 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 75 changer transitions 0/550 dead transitions. [2024-06-14 13:40:30,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 550 transitions, 8589 flow [2024-06-14 13:40:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:40:30,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:40:30,474 INFO L175 Difference]: Start difference. First operand has 378 places, 528 transitions, 7413 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:40:30,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 550 transitions, 8589 flow [2024-06-14 13:40:35,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 550 transitions, 8395 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 13:40:35,158 INFO L231 Difference]: Finished difference. Result has 378 places, 528 transitions, 7381 flow [2024-06-14 13:40:35,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7381, PETRI_PLACES=378, PETRI_TRANSITIONS=528} [2024-06-14 13:40:35,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 13:40:35,159 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 528 transitions, 7381 flow [2024-06-14 13:40:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:35,160 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] [2024-06-14 13:40:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:40:35,160 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)] === [2024-06-14 13:40:35,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1919236466, now seen corresponding path program 4 times [2024-06-14 13:40:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:35,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009881679] [2024-06-14 13:40:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:36,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:36,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009881679] [2024-06-14 13:40:36,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009881679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:36,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:36,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11531864] [2024-06-14 13:40:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:36,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:36,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:36,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 528 transitions, 7381 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:36,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:36,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:36,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:37,632 INFO L124 PetriNetUnfolderBase]: 3520/5591 cut-off events. [2024-06-14 13:40:37,632 INFO L125 PetriNetUnfolderBase]: For 914093/914093 co-relation queries the response was YES. [2024-06-14 13:40:37,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51475 conditions, 5591 events. 3520/5591 cut-off events. For 914093/914093 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33777 event pairs, 691 based on Foata normal form. 2/5590 useless extension candidates. Maximal degree in co-relation 51295. Up to 5057 conditions per place. [2024-06-14 13:40:37,723 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 444 selfloop transitions, 99 changer transitions 0/548 dead transitions. [2024-06-14 13:40:37,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 548 transitions, 8545 flow [2024-06-14 13:40:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:40:37,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:40:37,725 INFO L175 Difference]: Start difference. First operand has 378 places, 528 transitions, 7381 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:40:37,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 548 transitions, 8545 flow [2024-06-14 13:40:42,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 548 transitions, 8349 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:40:42,352 INFO L231 Difference]: Finished difference. Result has 378 places, 528 transitions, 7397 flow [2024-06-14 13:40:42,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7397, PETRI_PLACES=378, PETRI_TRANSITIONS=528} [2024-06-14 13:40:42,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 13:40:42,354 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 528 transitions, 7397 flow [2024-06-14 13:40:42,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:42,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:42,355 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] [2024-06-14 13:40:42,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:40:42,358 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)] === [2024-06-14 13:40:42,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1501146714, now seen corresponding path program 1 times [2024-06-14 13:40:42,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:42,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390647918] [2024-06-14 13:40:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:43,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:43,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390647918] [2024-06-14 13:40:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390647918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:43,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:43,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237332717] [2024-06-14 13:40:43,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:43,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:43,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:43,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:43,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 528 transitions, 7397 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:43,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:43,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:43,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:44,639 INFO L124 PetriNetUnfolderBase]: 3513/5584 cut-off events. [2024-06-14 13:40:44,640 INFO L125 PetriNetUnfolderBase]: For 900950/900950 co-relation queries the response was YES. [2024-06-14 13:40:44,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51333 conditions, 5584 events. 3513/5584 cut-off events. For 900950/900950 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33704 event pairs, 691 based on Foata normal form. 1/5582 useless extension candidates. Maximal degree in co-relation 51153. Up to 5241 conditions per place. [2024-06-14 13:40:44,726 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 491 selfloop transitions, 50 changer transitions 0/546 dead transitions. [2024-06-14 13:40:44,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 546 transitions, 8573 flow [2024-06-14 13:40:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:40:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:40:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:40:44,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:40:44,727 INFO L175 Difference]: Start difference. First operand has 378 places, 528 transitions, 7397 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:40:44,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 546 transitions, 8573 flow [2024-06-14 13:40:48,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 546 transitions, 8327 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:40:48,898 INFO L231 Difference]: Finished difference. Result has 379 places, 530 transitions, 7298 flow [2024-06-14 13:40:48,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7298, PETRI_PLACES=379, PETRI_TRANSITIONS=530} [2024-06-14 13:40:48,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-14 13:40:48,899 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 530 transitions, 7298 flow [2024-06-14 13:40:48,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:48,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:48,899 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] [2024-06-14 13:40:48,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:40:48,899 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)] === [2024-06-14 13:40:48,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2123782236, now seen corresponding path program 2 times [2024-06-14 13:40:48,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:48,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990667717] [2024-06-14 13:40:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:48,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:49,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:49,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990667717] [2024-06-14 13:40:49,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990667717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:49,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:49,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:49,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124870770] [2024-06-14 13:40:49,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:49,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:49,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 530 transitions, 7298 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:49,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:49,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:49,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:51,177 INFO L124 PetriNetUnfolderBase]: 3563/5661 cut-off events. [2024-06-14 13:40:51,177 INFO L125 PetriNetUnfolderBase]: For 934791/934793 co-relation queries the response was YES. [2024-06-14 13:40:51,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52304 conditions, 5661 events. 3563/5661 cut-off events. For 934791/934793 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34225 event pairs, 730 based on Foata normal form. 1/5659 useless extension candidates. Maximal degree in co-relation 52124. Up to 4611 conditions per place. [2024-06-14 13:40:51,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 206 changer transitions 0/559 dead transitions. [2024-06-14 13:40:51,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 559 transitions, 9190 flow [2024-06-14 13:40:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:40:51,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 13:40:51,271 INFO L175 Difference]: Start difference. First operand has 379 places, 530 transitions, 7298 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:40:51,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 559 transitions, 9190 flow [2024-06-14 13:40:55,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 559 transitions, 9040 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:40:55,628 INFO L231 Difference]: Finished difference. Result has 380 places, 544 transitions, 7844 flow [2024-06-14 13:40:55,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7844, PETRI_PLACES=380, PETRI_TRANSITIONS=544} [2024-06-14 13:40:55,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-14 13:40:55,628 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 544 transitions, 7844 flow [2024-06-14 13:40:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:55,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:55,629 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] [2024-06-14 13:40:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:40:55,629 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)] === [2024-06-14 13:40:55,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash -701360228, now seen corresponding path program 3 times [2024-06-14 13:40:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:55,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55917842] [2024-06-14 13:40:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:56,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:56,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55917842] [2024-06-14 13:40:56,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55917842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:56,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:56,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:56,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467256954] [2024-06-14 13:40:56,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:56,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:56,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:56,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:56,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:56,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:40:56,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 544 transitions, 7844 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:56,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:56,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:40:56,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:57,846 INFO L124 PetriNetUnfolderBase]: 3576/5677 cut-off events. [2024-06-14 13:40:57,847 INFO L125 PetriNetUnfolderBase]: For 958709/958711 co-relation queries the response was YES. [2024-06-14 13:40:57,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53277 conditions, 5677 events. 3576/5677 cut-off events. For 958709/958711 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34265 event pairs, 730 based on Foata normal form. 1/5675 useless extension candidates. Maximal degree in co-relation 53096. Up to 4626 conditions per place. [2024-06-14 13:40:57,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 207 changer transitions 0/564 dead transitions. [2024-06-14 13:40:57,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 564 transitions, 9592 flow [2024-06-14 13:40:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:40:57,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:40:57,938 INFO L175 Difference]: Start difference. First operand has 380 places, 544 transitions, 7844 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:40:57,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 564 transitions, 9592 flow [2024-06-14 13:41:02,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 564 transitions, 9178 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 13:41:02,553 INFO L231 Difference]: Finished difference. Result has 384 places, 550 transitions, 7974 flow [2024-06-14 13:41:02,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7974, PETRI_PLACES=384, PETRI_TRANSITIONS=550} [2024-06-14 13:41:02,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-14 13:41:02,554 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 550 transitions, 7974 flow [2024-06-14 13:41:02,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:02,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:02,554 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] [2024-06-14 13:41:02,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:41:02,554 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)] === [2024-06-14 13:41:02,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1574620590, now seen corresponding path program 4 times [2024-06-14 13:41:02,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:02,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841312807] [2024-06-14 13:41:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:02,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:03,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841312807] [2024-06-14 13:41:03,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841312807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:03,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:03,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124178499] [2024-06-14 13:41:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:03,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:41:03,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 550 transitions, 7974 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:03,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:03,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:41:03,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:05,042 INFO L124 PetriNetUnfolderBase]: 3573/5677 cut-off events. [2024-06-14 13:41:05,043 INFO L125 PetriNetUnfolderBase]: For 966550/966554 co-relation queries the response was YES. [2024-06-14 13:41:05,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53232 conditions, 5677 events. 3573/5677 cut-off events. For 966550/966554 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34330 event pairs, 709 based on Foata normal form. 5/5679 useless extension candidates. Maximal degree in co-relation 53050. Up to 5272 conditions per place. [2024-06-14 13:41:05,138 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 71 changer transitions 0/563 dead transitions. [2024-06-14 13:41:05,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 563 transitions, 9160 flow [2024-06-14 13:41:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:41:05,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 13:41:05,140 INFO L175 Difference]: Start difference. First operand has 384 places, 550 transitions, 7974 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:41:05,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 563 transitions, 9160 flow [2024-06-14 13:41:11,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 563 transitions, 8796 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:41:11,351 INFO L231 Difference]: Finished difference. Result has 388 places, 552 transitions, 7796 flow [2024-06-14 13:41:11,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7612, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7796, PETRI_PLACES=388, PETRI_TRANSITIONS=552} [2024-06-14 13:41:11,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-14 13:41:11,352 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 552 transitions, 7796 flow [2024-06-14 13:41:11,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:11,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:11,352 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] [2024-06-14 13:41:11,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:41:11,352 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)] === [2024-06-14 13:41:11,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1574353680, now seen corresponding path program 5 times [2024-06-14 13:41:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721210046] [2024-06-14 13:41:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:11,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721210046] [2024-06-14 13:41:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721210046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52301670] [2024-06-14 13:41:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:12,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:41:12,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 552 transitions, 7796 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:12,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:12,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:41:12,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:13,701 INFO L124 PetriNetUnfolderBase]: 3566/5667 cut-off events. [2024-06-14 13:41:13,701 INFO L125 PetriNetUnfolderBase]: For 971259/971263 co-relation queries the response was YES. [2024-06-14 13:41:13,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52432 conditions, 5667 events. 3566/5667 cut-off events. For 971259/971263 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34267 event pairs, 709 based on Foata normal form. 5/5669 useless extension candidates. Maximal degree in co-relation 52249. Up to 5249 conditions per place. [2024-06-14 13:41:13,787 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 479 selfloop transitions, 83 changer transitions 0/567 dead transitions. [2024-06-14 13:41:13,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 567 transitions, 9230 flow [2024-06-14 13:41:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:41:13,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 13:41:13,789 INFO L175 Difference]: Start difference. First operand has 388 places, 552 transitions, 7796 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:41:13,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 567 transitions, 9230 flow [2024-06-14 13:41:18,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 567 transitions, 9034 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:41:18,058 INFO L231 Difference]: Finished difference. Result has 392 places, 554 transitions, 7826 flow [2024-06-14 13:41:18,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7826, PETRI_PLACES=392, PETRI_TRANSITIONS=554} [2024-06-14 13:41:18,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-14 13:41:18,059 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 554 transitions, 7826 flow [2024-06-14 13:41:18,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:18,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:18,059 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] [2024-06-14 13:41:18,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:41:18,060 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)] === [2024-06-14 13:41:18,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:18,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1367491920, now seen corresponding path program 6 times [2024-06-14 13:41:18,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:18,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437171839] [2024-06-14 13:41:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:18,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:18,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:18,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437171839] [2024-06-14 13:41:18,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437171839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:18,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:18,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:18,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434021537] [2024-06-14 13:41:18,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:18,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:19,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:41:19,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 554 transitions, 7826 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:19,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:19,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:41:19,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:20,765 INFO L124 PetriNetUnfolderBase]: 3556/5653 cut-off events. [2024-06-14 13:41:20,765 INFO L125 PetriNetUnfolderBase]: For 979690/979694 co-relation queries the response was YES. [2024-06-14 13:41:20,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52247 conditions, 5653 events. 3556/5653 cut-off events. For 979690/979694 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34202 event pairs, 707 based on Foata normal form. 6/5656 useless extension candidates. Maximal degree in co-relation 52062. Up to 5228 conditions per place. [2024-06-14 13:41:20,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 81 changer transitions 0/568 dead transitions. [2024-06-14 13:41:20,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 568 transitions, 9022 flow [2024-06-14 13:41:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:41:20,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:41:20,908 INFO L175 Difference]: Start difference. First operand has 392 places, 554 transitions, 7826 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:41:20,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 568 transitions, 9022 flow [2024-06-14 13:41:26,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 568 transitions, 8746 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:41:26,029 INFO L231 Difference]: Finished difference. Result has 394 places, 556 transitions, 7759 flow [2024-06-14 13:41:26,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7759, PETRI_PLACES=394, PETRI_TRANSITIONS=556} [2024-06-14 13:41:26,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-14 13:41:26,029 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 556 transitions, 7759 flow [2024-06-14 13:41:26,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:26,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:26,030 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] [2024-06-14 13:41:26,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:41:26,030 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)] === [2024-06-14 13:41:26,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1781463088, now seen corresponding path program 4 times [2024-06-14 13:41:26,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:26,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958576444] [2024-06-14 13:41:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:26,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:26,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:26,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958576444] [2024-06-14 13:41:26,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958576444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:26,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:26,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:26,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194336238] [2024-06-14 13:41:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:26,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:26,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:26,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:41:26,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 556 transitions, 7759 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:41:26,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:26,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:41:26,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:28,263 INFO L124 PetriNetUnfolderBase]: 3615/5749 cut-off events. [2024-06-14 13:41:28,264 INFO L125 PetriNetUnfolderBase]: For 993719/993719 co-relation queries the response was YES. [2024-06-14 13:41:28,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52871 conditions, 5749 events. 3615/5749 cut-off events. For 993719/993719 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34843 event pairs, 692 based on Foata normal form. 2/5750 useless extension candidates. Maximal degree in co-relation 52685. Up to 5385 conditions per place. [2024-06-14 13:41:28,361 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 550 selfloop transitions, 45 changer transitions 0/600 dead transitions. [2024-06-14 13:41:28,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 600 transitions, 9255 flow [2024-06-14 13:41:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:41:28,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 13:41:28,362 INFO L175 Difference]: Start difference. First operand has 394 places, 556 transitions, 7759 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:41:28,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 600 transitions, 9255 flow [2024-06-14 13:41:33,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 600 transitions, 9088 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:41:33,916 INFO L231 Difference]: Finished difference. Result has 399 places, 572 transitions, 7941 flow [2024-06-14 13:41:33,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7592, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7941, PETRI_PLACES=399, PETRI_TRANSITIONS=572} [2024-06-14 13:41:33,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-14 13:41:33,917 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 572 transitions, 7941 flow [2024-06-14 13:41:33,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:41:33,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:33,926 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] [2024-06-14 13:41:33,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:41:33,927 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)] === [2024-06-14 13:41:33,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash -785950116, now seen corresponding path program 5 times [2024-06-14 13:41:33,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:33,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300415207] [2024-06-14 13:41:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:33,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:34,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300415207] [2024-06-14 13:41:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300415207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:34,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:34,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165694384] [2024-06-14 13:41:34,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:34,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:34,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:41:34,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 572 transitions, 7941 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:41:34,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:34,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:41:34,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:36,298 INFO L124 PetriNetUnfolderBase]: 3679/5862 cut-off events. [2024-06-14 13:41:36,298 INFO L125 PetriNetUnfolderBase]: For 1011876/1011876 co-relation queries the response was YES. [2024-06-14 13:41:36,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53825 conditions, 5862 events. 3679/5862 cut-off events. For 1011876/1011876 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 35780 event pairs, 712 based on Foata normal form. 2/5863 useless extension candidates. Maximal degree in co-relation 53636. Up to 5470 conditions per place. [2024-06-14 13:41:36,386 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 50 changer transitions 0/614 dead transitions. [2024-06-14 13:41:36,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 614 transitions, 9503 flow [2024-06-14 13:41:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:41:36,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 13:41:36,390 INFO L175 Difference]: Start difference. First operand has 399 places, 572 transitions, 7941 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:41:36,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 614 transitions, 9503 flow [2024-06-14 13:41:41,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 614 transitions, 9320 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-14 13:41:41,217 INFO L231 Difference]: Finished difference. Result has 406 places, 584 transitions, 8142 flow [2024-06-14 13:41:41,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7831, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8142, PETRI_PLACES=406, PETRI_TRANSITIONS=584} [2024-06-14 13:41:41,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-14 13:41:41,223 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 584 transitions, 8142 flow [2024-06-14 13:41:41,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:41:41,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:41,224 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] [2024-06-14 13:41:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:41:41,225 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)] === [2024-06-14 13:41:41,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1775231248, now seen corresponding path program 6 times [2024-06-14 13:41:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299124334] [2024-06-14 13:41:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:41,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299124334] [2024-06-14 13:41:41,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299124334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:41,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:41,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:41,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619367580] [2024-06-14 13:41:41,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:41,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:41,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:41,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:41,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:41:41,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 584 transitions, 8142 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:41:41,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:41,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:41:41,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:43,440 INFO L124 PetriNetUnfolderBase]: 3731/5948 cut-off events. [2024-06-14 13:41:43,440 INFO L125 PetriNetUnfolderBase]: For 1012251/1012251 co-relation queries the response was YES. [2024-06-14 13:41:43,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54165 conditions, 5948 events. 3731/5948 cut-off events. For 1012251/1012251 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36475 event pairs, 658 based on Foata normal form. 2/5949 useless extension candidates. Maximal degree in co-relation 53974. Up to 5443 conditions per place. [2024-06-14 13:41:43,541 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 65 changer transitions 0/629 dead transitions. [2024-06-14 13:41:43,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 629 transitions, 9782 flow [2024-06-14 13:41:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:41:43,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 13:41:43,543 INFO L175 Difference]: Start difference. First operand has 406 places, 584 transitions, 8142 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:41:43,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 629 transitions, 9782 flow [2024-06-14 13:41:48,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 629 transitions, 9529 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-14 13:41:48,260 INFO L231 Difference]: Finished difference. Result has 409 places, 599 transitions, 8362 flow [2024-06-14 13:41:48,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7962, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8362, PETRI_PLACES=409, PETRI_TRANSITIONS=599} [2024-06-14 13:41:48,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-14 13:41:48,262 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 599 transitions, 8362 flow [2024-06-14 13:41:48,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-14 13:41:48,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:48,262 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] [2024-06-14 13:41:48,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:41:48,262 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)] === [2024-06-14 13:41:48,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash -874480315, now seen corresponding path program 1 times [2024-06-14 13:41:48,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:48,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721260843] [2024-06-14 13:41:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:48,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:49,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721260843] [2024-06-14 13:41:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721260843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:49,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:41:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437640349] [2024-06-14 13:41:49,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:49,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:41:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:41:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:41:49,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:41:49,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 599 transitions, 8362 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:49,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:49,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:41:49,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:50,870 INFO L124 PetriNetUnfolderBase]: 3776/6015 cut-off events. [2024-06-14 13:41:50,870 INFO L125 PetriNetUnfolderBase]: For 1070039/1070039 co-relation queries the response was YES. [2024-06-14 13:41:50,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55640 conditions, 6015 events. 3776/6015 cut-off events. For 1070039/1070039 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36892 event pairs, 664 based on Foata normal form. 4/6017 useless extension candidates. Maximal degree in co-relation 55448. Up to 5384 conditions per place. [2024-06-14 13:41:50,965 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 542 selfloop transitions, 83 changer transitions 0/630 dead transitions. [2024-06-14 13:41:50,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 630 transitions, 10153 flow [2024-06-14 13:41:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:41:50,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 13:41:50,966 INFO L175 Difference]: Start difference. First operand has 409 places, 599 transitions, 8362 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:41:50,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 630 transitions, 10153 flow [2024-06-14 13:41:55,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 630 transitions, 9954 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 13:41:55,714 INFO L231 Difference]: Finished difference. Result has 412 places, 605 transitions, 8552 flow [2024-06-14 13:41:55,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8163, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8552, PETRI_PLACES=412, PETRI_TRANSITIONS=605} [2024-06-14 13:41:55,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-14 13:41:55,715 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 605 transitions, 8552 flow [2024-06-14 13:41:55,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:55,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:55,715 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] [2024-06-14 13:41:55,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:41:55,716 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)] === [2024-06-14 13:41:55,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:55,716 INFO L85 PathProgramCache]: Analyzing trace with hash -872602645, now seen corresponding path program 2 times [2024-06-14 13:41:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:55,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306058288] [2024-06-14 13:41:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:56,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:56,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306058288] [2024-06-14 13:41:56,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306058288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:56,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:56,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:41:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729886002] [2024-06-14 13:41:56,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:41:56,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:41:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:41:56,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:41:56,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 605 transitions, 8552 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:56,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:56,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:41:56,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:58,504 INFO L124 PetriNetUnfolderBase]: 3792/6039 cut-off events. [2024-06-14 13:41:58,505 INFO L125 PetriNetUnfolderBase]: For 1090721/1090721 co-relation queries the response was YES. [2024-06-14 13:41:58,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56227 conditions, 6039 events. 3792/6039 cut-off events. For 1090721/1090721 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 37093 event pairs, 759 based on Foata normal form. 4/6040 useless extension candidates. Maximal degree in co-relation 56034. Up to 5452 conditions per place. [2024-06-14 13:41:58,604 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 516 selfloop transitions, 108 changer transitions 0/629 dead transitions. [2024-06-14 13:41:58,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 629 transitions, 9987 flow [2024-06-14 13:41:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:41:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:41:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:41:58,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 13:41:58,605 INFO L175 Difference]: Start difference. First operand has 412 places, 605 transitions, 8552 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:41:58,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 629 transitions, 9987 flow [2024-06-14 13:42:03,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 629 transitions, 9703 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 13:42:03,770 INFO L231 Difference]: Finished difference. Result has 415 places, 608 transitions, 8601 flow [2024-06-14 13:42:03,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8270, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8601, PETRI_PLACES=415, PETRI_TRANSITIONS=608} [2024-06-14 13:42:03,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-14 13:42:03,770 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 608 transitions, 8601 flow [2024-06-14 13:42:03,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:03,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:03,771 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] [2024-06-14 13:42:03,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:42:03,771 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)] === [2024-06-14 13:42:03,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash -872606365, now seen corresponding path program 3 times [2024-06-14 13:42:03,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:03,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510147233] [2024-06-14 13:42:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:03,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:04,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:04,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510147233] [2024-06-14 13:42:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510147233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:04,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:04,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:42:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135840040] [2024-06-14 13:42:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:42:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:42:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:42:04,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:42:04,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 608 transitions, 8601 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:04,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:04,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:42:04,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:06,561 INFO L124 PetriNetUnfolderBase]: 3837/6110 cut-off events. [2024-06-14 13:42:06,561 INFO L125 PetriNetUnfolderBase]: For 1135150/1135150 co-relation queries the response was YES. [2024-06-14 13:42:06,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57463 conditions, 6110 events. 3837/6110 cut-off events. For 1135150/1135150 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37557 event pairs, 761 based on Foata normal form. 4/6111 useless extension candidates. Maximal degree in co-relation 57269. Up to 5446 conditions per place. [2024-06-14 13:42:06,682 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 529 selfloop transitions, 102 changer transitions 0/636 dead transitions. [2024-06-14 13:42:06,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 636 transitions, 10412 flow [2024-06-14 13:42:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:42:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:42:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:42:06,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 13:42:06,696 INFO L175 Difference]: Start difference. First operand has 415 places, 608 transitions, 8601 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:42:06,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 636 transitions, 10412 flow [2024-06-14 13:42:13,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 636 transitions, 10105 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 13:42:13,192 INFO L231 Difference]: Finished difference. Result has 418 places, 614 transitions, 8748 flow [2024-06-14 13:42:13,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8748, PETRI_PLACES=418, PETRI_TRANSITIONS=614} [2024-06-14 13:42:13,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-14 13:42:13,193 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 614 transitions, 8748 flow [2024-06-14 13:42:13,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:13,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:13,193 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] [2024-06-14 13:42:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:42:13,193 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)] === [2024-06-14 13:42:13,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash -785760733, now seen corresponding path program 1 times [2024-06-14 13:42:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:13,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131621486] [2024-06-14 13:42:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:14,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131621486] [2024-06-14 13:42:14,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131621486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:14,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:14,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:42:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359886246] [2024-06-14 13:42:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:42:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:42:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:42:14,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:42:14,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 614 transitions, 8748 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:14,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:14,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:42:14,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:15,687 INFO L124 PetriNetUnfolderBase]: 3945/6276 cut-off events. [2024-06-14 13:42:15,688 INFO L125 PetriNetUnfolderBase]: For 1295664/1295664 co-relation queries the response was YES. [2024-06-14 13:42:15,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59166 conditions, 6276 events. 3945/6276 cut-off events. For 1295664/1295664 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 38663 event pairs, 780 based on Foata normal form. 20/6293 useless extension candidates. Maximal degree in co-relation 58970. Up to 5625 conditions per place. [2024-06-14 13:42:15,786 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 546 selfloop transitions, 99 changer transitions 0/650 dead transitions. [2024-06-14 13:42:15,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 650 transitions, 10328 flow [2024-06-14 13:42:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:42:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:42:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:42:15,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-14 13:42:15,788 INFO L175 Difference]: Start difference. First operand has 418 places, 614 transitions, 8748 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:42:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 650 transitions, 10328 flow [2024-06-14 13:42:22,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 650 transitions, 10068 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-14 13:42:22,597 INFO L231 Difference]: Finished difference. Result has 424 places, 623 transitions, 8886 flow [2024-06-14 13:42:22,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8488, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8886, PETRI_PLACES=424, PETRI_TRANSITIONS=623} [2024-06-14 13:42:22,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-14 13:42:22,598 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 623 transitions, 8886 flow [2024-06-14 13:42:22,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:22,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:22,598 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] [2024-06-14 13:42:22,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:42:22,598 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)] === [2024-06-14 13:42:22,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1501345331, now seen corresponding path program 4 times [2024-06-14 13:42:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:22,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456176015] [2024-06-14 13:42:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:22,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:23,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:23,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456176015] [2024-06-14 13:42:23,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456176015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:23,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:23,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:42:23,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049962428] [2024-06-14 13:42:23,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:23,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:42:23,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:42:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:42:23,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:42:23,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 623 transitions, 8886 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:23,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:23,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:42:23,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:25,352 INFO L124 PetriNetUnfolderBase]: 4033/6413 cut-off events. [2024-06-14 13:42:25,352 INFO L125 PetriNetUnfolderBase]: For 1366049/1366049 co-relation queries the response was YES. [2024-06-14 13:42:25,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60969 conditions, 6413 events. 4033/6413 cut-off events. For 1366049/1366049 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39614 event pairs, 780 based on Foata normal form. 24/6434 useless extension candidates. Maximal degree in co-relation 60770. Up to 5498 conditions per place. [2024-06-14 13:42:25,448 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 481 selfloop transitions, 163 changer transitions 0/649 dead transitions. [2024-06-14 13:42:25,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 649 transitions, 10646 flow [2024-06-14 13:42:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:42:25,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:42:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:42:25,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 13:42:25,450 INFO L175 Difference]: Start difference. First operand has 424 places, 623 transitions, 8886 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:42:25,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 649 transitions, 10646 flow [2024-06-14 13:42:33,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 649 transitions, 10391 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 13:42:33,972 INFO L231 Difference]: Finished difference. Result has 426 places, 626 transitions, 9089 flow [2024-06-14 13:42:33,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8631, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9089, PETRI_PLACES=426, PETRI_TRANSITIONS=626} [2024-06-14 13:42:33,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-14 13:42:33,972 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 626 transitions, 9089 flow [2024-06-14 13:42:33,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:33,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:33,973 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] [2024-06-14 13:42:33,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:42:33,973 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)] === [2024-06-14 13:42:33,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1747218071, now seen corresponding path program 2 times [2024-06-14 13:42:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:33,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524602148] [2024-06-14 13:42:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524602148] [2024-06-14 13:42:34,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524602148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:34,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:34,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:34,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369307146] [2024-06-14 13:42:34,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:34,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:34,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:42:34,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 626 transitions, 9089 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:34,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:34,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:42:34,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:36,514 INFO L124 PetriNetUnfolderBase]: 4233/6706 cut-off events. [2024-06-14 13:42:36,514 INFO L125 PetriNetUnfolderBase]: For 1527984/1527984 co-relation queries the response was YES. [2024-06-14 13:42:36,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67410 conditions, 6706 events. 4233/6706 cut-off events. For 1527984/1527984 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 41453 event pairs, 830 based on Foata normal form. 16/6719 useless extension candidates. Maximal degree in co-relation 67210. Up to 5434 conditions per place. [2024-06-14 13:42:36,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 172 changer transitions 0/658 dead transitions. [2024-06-14 13:42:36,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 658 transitions, 11255 flow [2024-06-14 13:42:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:42:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:42:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:42:36,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 13:42:36,623 INFO L175 Difference]: Start difference. First operand has 426 places, 626 transitions, 9089 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:42:36,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 658 transitions, 11255 flow [2024-06-14 13:42:44,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 658 transitions, 10843 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 13:42:44,562 INFO L231 Difference]: Finished difference. Result has 428 places, 630 transitions, 9230 flow [2024-06-14 13:42:44,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8677, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9230, PETRI_PLACES=428, PETRI_TRANSITIONS=630} [2024-06-14 13:42:44,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-14 13:42:44,563 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 630 transitions, 9230 flow [2024-06-14 13:42:44,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:44,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:44,563 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] [2024-06-14 13:42:44,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:42:44,564 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)] === [2024-06-14 13:42:44,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1741496339, now seen corresponding path program 5 times [2024-06-14 13:42:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:44,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223742292] [2024-06-14 13:42:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:44,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223742292] [2024-06-14 13:42:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223742292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:45,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:45,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:42:45,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48207329] [2024-06-14 13:42:45,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:45,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:42:45,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:45,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:42:45,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:42:45,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:42:45,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 630 transitions, 9230 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:45,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:45,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:42:45,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:47,328 INFO L124 PetriNetUnfolderBase]: 4223/6700 cut-off events. [2024-06-14 13:42:47,329 INFO L125 PetriNetUnfolderBase]: For 1405507/1405507 co-relation queries the response was YES. [2024-06-14 13:42:47,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66224 conditions, 6700 events. 4223/6700 cut-off events. For 1405507/1405507 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 41640 event pairs, 866 based on Foata normal form. 4/6701 useless extension candidates. Maximal degree in co-relation 66023. Up to 5872 conditions per place. [2024-06-14 13:42:47,441 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 497 selfloop transitions, 150 changer transitions 0/652 dead transitions. [2024-06-14 13:42:47,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 652 transitions, 10976 flow [2024-06-14 13:42:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:42:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:42:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:42:47,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 13:42:47,442 INFO L175 Difference]: Start difference. First operand has 428 places, 630 transitions, 9230 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:42:47,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 652 transitions, 10976 flow [2024-06-14 13:42:56,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 652 transitions, 10678 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 13:42:56,715 INFO L231 Difference]: Finished difference. Result has 432 places, 633 transitions, 9372 flow [2024-06-14 13:42:56,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9372, PETRI_PLACES=432, PETRI_TRANSITIONS=633} [2024-06-14 13:42:56,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-14 13:42:56,716 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 633 transitions, 9372 flow [2024-06-14 13:42:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:56,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:56,716 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] [2024-06-14 13:42:56,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:42:56,716 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)] === [2024-06-14 13:42:56,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:56,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1741646441, now seen corresponding path program 3 times [2024-06-14 13:42:56,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:56,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324262565] [2024-06-14 13:42:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:57,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324262565] [2024-06-14 13:42:57,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324262565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:57,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:57,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:42:57,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150091883] [2024-06-14 13:42:57,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:57,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:42:57,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:42:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:42:57,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:42:57,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 633 transitions, 9372 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:57,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:57,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:42:57,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:59,809 INFO L124 PetriNetUnfolderBase]: 4315/6832 cut-off events. [2024-06-14 13:42:59,810 INFO L125 PetriNetUnfolderBase]: For 1564519/1564519 co-relation queries the response was YES. [2024-06-14 13:42:59,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67815 conditions, 6832 events. 4315/6832 cut-off events. For 1564519/1564519 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 42421 event pairs, 866 based on Foata normal form. 20/6849 useless extension candidates. Maximal degree in co-relation 67612. Up to 5916 conditions per place. [2024-06-14 13:42:59,914 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 156 changer transitions 0/664 dead transitions. [2024-06-14 13:42:59,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 664 transitions, 11236 flow [2024-06-14 13:42:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:42:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:42:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 13:42:59,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-14 13:42:59,915 INFO L175 Difference]: Start difference. First operand has 432 places, 633 transitions, 9372 flow. Second operand 10 states and 177 transitions. [2024-06-14 13:42:59,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 664 transitions, 11236 flow [2024-06-14 13:43:08,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 664 transitions, 10818 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-14 13:43:08,403 INFO L231 Difference]: Finished difference. Result has 436 places, 639 transitions, 9467 flow [2024-06-14 13:43:08,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9467, PETRI_PLACES=436, PETRI_TRANSITIONS=639} [2024-06-14 13:43:08,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 13:43:08,404 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 639 transitions, 9467 flow [2024-06-14 13:43:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:08,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:08,404 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] [2024-06-14 13:43:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:43:08,404 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)] === [2024-06-14 13:43:08,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1741492619, now seen corresponding path program 6 times [2024-06-14 13:43:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:08,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316134222] [2024-06-14 13:43:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:09,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:09,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316134222] [2024-06-14 13:43:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316134222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:09,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:09,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:43:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945279877] [2024-06-14 13:43:09,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:09,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:43:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:43:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:43:09,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:43:09,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 639 transitions, 9467 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:09,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:09,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:43:09,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:11,312 INFO L124 PetriNetUnfolderBase]: 4419/6994 cut-off events. [2024-06-14 13:43:11,312 INFO L125 PetriNetUnfolderBase]: For 1579588/1579588 co-relation queries the response was YES. [2024-06-14 13:43:11,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71398 conditions, 6994 events. 4419/6994 cut-off events. For 1579588/1579588 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 43604 event pairs, 881 based on Foata normal form. 4/6995 useless extension candidates. Maximal degree in co-relation 71193. Up to 5902 conditions per place. [2024-06-14 13:43:11,435 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 155 changer transitions 0/669 dead transitions. [2024-06-14 13:43:11,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 669 transitions, 11673 flow [2024-06-14 13:43:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:43:11,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 13:43:11,436 INFO L175 Difference]: Start difference. First operand has 436 places, 639 transitions, 9467 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:43:11,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 669 transitions, 11673 flow [2024-06-14 13:43:19,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 669 transitions, 11275 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 13:43:19,796 INFO L231 Difference]: Finished difference. Result has 439 places, 645 transitions, 9670 flow [2024-06-14 13:43:19,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9069, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9670, PETRI_PLACES=439, PETRI_TRANSITIONS=645} [2024-06-14 13:43:19,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 13:43:19,797 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 645 transitions, 9670 flow [2024-06-14 13:43:19,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:19,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:19,798 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] [2024-06-14 13:43:19,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:43:19,798 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)] === [2024-06-14 13:43:19,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1747008821, now seen corresponding path program 4 times [2024-06-14 13:43:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:19,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420492929] [2024-06-14 13:43:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:20,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:20,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420492929] [2024-06-14 13:43:20,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420492929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:20,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:20,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:43:20,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851814843] [2024-06-14 13:43:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:20,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:43:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:43:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:43:20,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:43:20,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 645 transitions, 9670 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:20,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:20,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:43:20,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:22,554 INFO L124 PetriNetUnfolderBase]: 4439/7030 cut-off events. [2024-06-14 13:43:22,554 INFO L125 PetriNetUnfolderBase]: For 1672660/1672660 co-relation queries the response was YES. [2024-06-14 13:43:22,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70487 conditions, 7030 events. 4439/7030 cut-off events. For 1672660/1672660 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 43855 event pairs, 882 based on Foata normal form. 20/7047 useless extension candidates. Maximal degree in co-relation 70280. Up to 6014 conditions per place. [2024-06-14 13:43:22,673 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 161 changer transitions 0/669 dead transitions. [2024-06-14 13:43:22,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 669 transitions, 11200 flow [2024-06-14 13:43:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:43:22,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 13:43:22,675 INFO L175 Difference]: Start difference. First operand has 439 places, 645 transitions, 9670 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:43:22,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 669 transitions, 11200 flow [2024-06-14 13:43:31,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 669 transitions, 10857 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-06-14 13:43:31,384 INFO L231 Difference]: Finished difference. Result has 443 places, 647 transitions, 9775 flow [2024-06-14 13:43:31,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9327, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9775, PETRI_PLACES=443, PETRI_TRANSITIONS=647} [2024-06-14 13:43:31,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-14 13:43:31,385 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 647 transitions, 9775 flow [2024-06-14 13:43:31,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:31,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:31,385 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] [2024-06-14 13:43:31,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:43:31,385 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)] === [2024-06-14 13:43:31,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1110974825, now seen corresponding path program 5 times [2024-06-14 13:43:31,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:31,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188683249] [2024-06-14 13:43:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:32,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:32,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188683249] [2024-06-14 13:43:32,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188683249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:32,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:32,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:43:32,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627127459] [2024-06-14 13:43:32,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:32,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:43:32,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:43:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:43:32,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:43:32,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 647 transitions, 9775 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:32,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:32,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:43:32,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:34,190 INFO L124 PetriNetUnfolderBase]: 4639/7329 cut-off events. [2024-06-14 13:43:34,190 INFO L125 PetriNetUnfolderBase]: For 1902291/1902293 co-relation queries the response was YES. [2024-06-14 13:43:34,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77657 conditions, 7329 events. 4639/7329 cut-off events. For 1902291/1902293 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45853 event pairs, 929 based on Foata normal form. 16/7342 useless extension candidates. Maximal degree in co-relation 77448. Up to 5805 conditions per place. [2024-06-14 13:43:34,316 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 274 changer transitions 0/677 dead transitions. [2024-06-14 13:43:34,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 677 transitions, 12007 flow [2024-06-14 13:43:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:43:34,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:43:34,318 INFO L175 Difference]: Start difference. First operand has 443 places, 647 transitions, 9775 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:43:34,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 677 transitions, 12007 flow [2024-06-14 13:43:40,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 677 transitions, 11629 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 13:43:40,776 INFO L231 Difference]: Finished difference. Result has 445 places, 651 transitions, 10171 flow [2024-06-14 13:43:40,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10171, PETRI_PLACES=445, PETRI_TRANSITIONS=651} [2024-06-14 13:43:40,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-14 13:43:40,777 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 651 transitions, 10171 flow [2024-06-14 13:43:40,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:40,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:40,777 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] [2024-06-14 13:43:40,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:43:40,777 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)] === [2024-06-14 13:43:40,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1110982265, now seen corresponding path program 6 times [2024-06-14 13:43:40,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:40,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724239935] [2024-06-14 13:43:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:40,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724239935] [2024-06-14 13:43:41,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724239935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:43:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493209782] [2024-06-14 13:43:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:41,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:43:41,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:43:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:43:41,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:43:41,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 651 transitions, 10171 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:41,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:41,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:43:41,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:43,695 INFO L124 PetriNetUnfolderBase]: 4649/7348 cut-off events. [2024-06-14 13:43:43,695 INFO L125 PetriNetUnfolderBase]: For 1891214/1891216 co-relation queries the response was YES. [2024-06-14 13:43:43,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76407 conditions, 7348 events. 4649/7348 cut-off events. For 1891214/1891216 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46037 event pairs, 957 based on Foata normal form. 24/7369 useless extension candidates. Maximal degree in co-relation 76197. Up to 6071 conditions per place. [2024-06-14 13:43:43,812 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 269 changer transitions 0/675 dead transitions. [2024-06-14 13:43:43,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 675 transitions, 12007 flow [2024-06-14 13:43:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:43:43,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 13:43:43,813 INFO L175 Difference]: Start difference. First operand has 445 places, 651 transitions, 10171 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:43:43,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 675 transitions, 12007 flow [2024-06-14 13:43:51,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 675 transitions, 11379 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 13:43:51,050 INFO L231 Difference]: Finished difference. Result has 448 places, 654 transitions, 10235 flow [2024-06-14 13:43:51,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9549, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10235, PETRI_PLACES=448, PETRI_TRANSITIONS=654} [2024-06-14 13:43:51,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-14 13:43:51,051 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 654 transitions, 10235 flow [2024-06-14 13:43:51,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:51,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:43:51,051 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] [2024-06-14 13:43:51,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:43:51,052 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)] === [2024-06-14 13:43:51,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:43:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1101778055, now seen corresponding path program 7 times [2024-06-14 13:43:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:43:51,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954440306] [2024-06-14 13:43:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:43:51,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:43:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:43:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:43:51,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:43:51,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954440306] [2024-06-14 13:43:51,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954440306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:43:51,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:43:51,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:43:51,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232551733] [2024-06-14 13:43:51,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:43:51,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:43:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:43:51,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:43:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:43:51,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:43:51,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 654 transitions, 10235 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:43:51,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:43:51,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:43:51,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:43:53,837 INFO L124 PetriNetUnfolderBase]: 4823/7626 cut-off events. [2024-06-14 13:43:53,837 INFO L125 PetriNetUnfolderBase]: For 2024656/2024658 co-relation queries the response was YES. [2024-06-14 13:43:53,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81861 conditions, 7626 events. 4823/7626 cut-off events. For 2024656/2024658 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 47902 event pairs, 946 based on Foata normal form. 16/7639 useless extension candidates. Maximal degree in co-relation 81650. Up to 5237 conditions per place. [2024-06-14 13:43:53,968 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 304 changer transitions 0/684 dead transitions. [2024-06-14 13:43:53,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 684 transitions, 12493 flow [2024-06-14 13:43:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:43:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:43:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:43:53,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 13:43:53,969 INFO L175 Difference]: Start difference. First operand has 448 places, 654 transitions, 10235 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:43:53,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 684 transitions, 12493 flow [2024-06-14 13:44:00,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 684 transitions, 11857 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-14 13:44:00,565 INFO L231 Difference]: Finished difference. Result has 450 places, 658 transitions, 10436 flow [2024-06-14 13:44:00,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9599, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10436, PETRI_PLACES=450, PETRI_TRANSITIONS=658} [2024-06-14 13:44:00,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-14 13:44:00,565 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 658 transitions, 10436 flow [2024-06-14 13:44:00,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:00,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:00,566 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] [2024-06-14 13:44:00,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:44:00,566 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)] === [2024-06-14 13:44:00,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash -667006003, now seen corresponding path program 7 times [2024-06-14 13:44:00,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:00,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477351888] [2024-06-14 13:44:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:01,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477351888] [2024-06-14 13:44:01,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477351888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:01,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:01,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:44:01,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84941328] [2024-06-14 13:44:01,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:01,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:44:01,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:44:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:44:01,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:44:01,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 658 transitions, 10436 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:01,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:01,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:44:01,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:03,721 INFO L124 PetriNetUnfolderBase]: 4839/7646 cut-off events. [2024-06-14 13:44:03,721 INFO L125 PetriNetUnfolderBase]: For 1940836/1940838 co-relation queries the response was YES. [2024-06-14 13:44:03,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82005 conditions, 7646 events. 4839/7646 cut-off events. For 1940836/1940838 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48218 event pairs, 1028 based on Foata normal form. 4/7647 useless extension candidates. Maximal degree in co-relation 81793. Up to 6445 conditions per place. [2024-06-14 13:44:03,856 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 432 selfloop transitions, 242 changer transitions 0/679 dead transitions. [2024-06-14 13:44:03,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 679 transitions, 12528 flow [2024-06-14 13:44:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:44:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:44:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:44:03,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:44:03,857 INFO L175 Difference]: Start difference. First operand has 450 places, 658 transitions, 10436 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:44:03,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 679 transitions, 12528 flow [2024-06-14 13:44:11,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 679 transitions, 12076 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-14 13:44:11,036 INFO L231 Difference]: Finished difference. Result has 454 places, 661 transitions, 10624 flow [2024-06-14 13:44:11,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9984, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10624, PETRI_PLACES=454, PETRI_TRANSITIONS=661} [2024-06-14 13:44:11,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-14 13:44:11,037 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 661 transitions, 10624 flow [2024-06-14 13:44:11,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:11,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:11,038 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] [2024-06-14 13:44:11,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:44:11,038 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)] === [2024-06-14 13:44:11,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:11,038 INFO L85 PathProgramCache]: Analyzing trace with hash 151951977, now seen corresponding path program 8 times [2024-06-14 13:44:11,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:11,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256839336] [2024-06-14 13:44:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:11,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:11,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:11,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256839336] [2024-06-14 13:44:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256839336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:11,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:44:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773391883] [2024-06-14 13:44:11,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:44:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:44:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:44:12,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:44:12,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 661 transitions, 10624 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:12,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:12,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:44:12,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:14,315 INFO L124 PetriNetUnfolderBase]: 4931/7805 cut-off events. [2024-06-14 13:44:14,315 INFO L125 PetriNetUnfolderBase]: For 2114370/2114372 co-relation queries the response was YES. [2024-06-14 13:44:14,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83796 conditions, 7805 events. 4931/7805 cut-off events. For 2114370/2114372 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 49430 event pairs, 1036 based on Foata normal form. 20/7822 useless extension candidates. Maximal degree in co-relation 83582. Up to 6481 conditions per place. [2024-06-14 13:44:14,440 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 247 changer transitions 0/691 dead transitions. [2024-06-14 13:44:14,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 691 transitions, 12814 flow [2024-06-14 13:44:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:44:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:44:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 13:44:14,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-14 13:44:14,441 INFO L175 Difference]: Start difference. First operand has 454 places, 661 transitions, 10624 flow. Second operand 10 states and 181 transitions. [2024-06-14 13:44:14,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 691 transitions, 12814 flow [2024-06-14 13:44:21,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 691 transitions, 12194 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-14 13:44:21,713 INFO L231 Difference]: Finished difference. Result has 458 places, 667 transitions, 10692 flow [2024-06-14 13:44:21,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10010, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10692, PETRI_PLACES=458, PETRI_TRANSITIONS=667} [2024-06-14 13:44:21,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-14 13:44:21,714 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 667 transitions, 10692 flow [2024-06-14 13:44:21,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:21,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:21,714 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] [2024-06-14 13:44:21,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:44:21,714 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)] === [2024-06-14 13:44:21,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash 157516167, now seen corresponding path program 9 times [2024-06-14 13:44:21,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83616018] [2024-06-14 13:44:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:21,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:22,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:22,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83616018] [2024-06-14 13:44:22,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83616018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:22,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:22,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:44:22,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009214652] [2024-06-14 13:44:22,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:22,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:44:22,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:22,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:44:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:44:22,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:44:22,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 667 transitions, 10692 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:22,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:22,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:44:22,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:24,589 INFO L124 PetriNetUnfolderBase]: 4993/7898 cut-off events. [2024-06-14 13:44:24,589 INFO L125 PetriNetUnfolderBase]: For 2159478/2159480 co-relation queries the response was YES. [2024-06-14 13:44:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84598 conditions, 7898 events. 4993/7898 cut-off events. For 2159478/2159480 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 50026 event pairs, 1073 based on Foata normal form. 24/7919 useless extension candidates. Maximal degree in co-relation 84382. Up to 6587 conditions per place. [2024-06-14 13:44:24,732 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 450 selfloop transitions, 237 changer transitions 0/692 dead transitions. [2024-06-14 13:44:24,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 692 transitions, 12862 flow [2024-06-14 13:44:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:44:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:44:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:44:24,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 13:44:24,733 INFO L175 Difference]: Start difference. First operand has 458 places, 667 transitions, 10692 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:44:24,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 692 transitions, 12862 flow [2024-06-14 13:44:31,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 692 transitions, 12283 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-14 13:44:31,013 INFO L231 Difference]: Finished difference. Result has 460 places, 670 transitions, 10755 flow [2024-06-14 13:44:31,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10113, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10755, PETRI_PLACES=460, PETRI_TRANSITIONS=670} [2024-06-14 13:44:31,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-14 13:44:31,014 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 670 transitions, 10755 flow [2024-06-14 13:44:31,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:31,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:31,014 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] [2024-06-14 13:44:31,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:44:31,014 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)] === [2024-06-14 13:44:31,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:31,015 INFO L85 PathProgramCache]: Analyzing trace with hash 151798155, now seen corresponding path program 8 times [2024-06-14 13:44:31,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:31,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218171672] [2024-06-14 13:44:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:31,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:32,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:32,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218171672] [2024-06-14 13:44:32,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218171672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:32,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:32,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:44:32,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986767345] [2024-06-14 13:44:32,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:32,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:44:32,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:44:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:44:32,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:44:32,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 670 transitions, 10755 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:32,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:32,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:44:32,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:34,292 INFO L124 PetriNetUnfolderBase]: 5058/7997 cut-off events. [2024-06-14 13:44:34,292 INFO L125 PetriNetUnfolderBase]: For 2062671/2062673 co-relation queries the response was YES. [2024-06-14 13:44:34,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86098 conditions, 7997 events. 5058/7997 cut-off events. For 2062671/2062673 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 50777 event pairs, 1062 based on Foata normal form. 4/7998 useless extension candidates. Maximal degree in co-relation 85881. Up to 6388 conditions per place. [2024-06-14 13:44:34,432 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 445 selfloop transitions, 249 changer transitions 0/699 dead transitions. [2024-06-14 13:44:34,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 699 transitions, 13349 flow [2024-06-14 13:44:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:44:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:44:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:44:34,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 13:44:34,434 INFO L175 Difference]: Start difference. First operand has 460 places, 670 transitions, 10755 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:44:34,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 699 transitions, 13349 flow [2024-06-14 13:44:43,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 699 transitions, 12757 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-14 13:44:43,230 INFO L231 Difference]: Finished difference. Result has 463 places, 676 transitions, 10987 flow [2024-06-14 13:44:43,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10163, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10987, PETRI_PLACES=463, PETRI_TRANSITIONS=676} [2024-06-14 13:44:43,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-14 13:44:43,230 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 676 transitions, 10987 flow [2024-06-14 13:44:43,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:43,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:43,231 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] [2024-06-14 13:44:43,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:44:43,231 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)] === [2024-06-14 13:44:43,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash 157523607, now seen corresponding path program 10 times [2024-06-14 13:44:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:43,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987958196] [2024-06-14 13:44:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:43,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:44,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:44,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987958196] [2024-06-14 13:44:44,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987958196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:44,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:44,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:44:44,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989340718] [2024-06-14 13:44:44,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:44:44,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:44:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:44:44,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:44:44,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 676 transitions, 10987 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:44,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:44,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:44:44,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:46,743 INFO L124 PetriNetUnfolderBase]: 5114/8101 cut-off events. [2024-06-14 13:44:46,744 INFO L125 PetriNetUnfolderBase]: For 2207689/2207691 co-relation queries the response was YES. [2024-06-14 13:44:46,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86717 conditions, 8101 events. 5114/8101 cut-off events. For 2207689/2207691 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 51568 event pairs, 1090 based on Foata normal form. 16/8114 useless extension candidates. Maximal degree in co-relation 86498. Up to 6456 conditions per place. [2024-06-14 13:44:46,893 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 455 selfloop transitions, 244 changer transitions 0/704 dead transitions. [2024-06-14 13:44:46,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 704 transitions, 13465 flow [2024-06-14 13:44:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:44:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:44:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:44:46,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 13:44:46,894 INFO L175 Difference]: Start difference. First operand has 463 places, 676 transitions, 10987 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:44:46,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 704 transitions, 13465 flow [2024-06-14 13:44:55,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 704 transitions, 12980 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-06-14 13:44:55,817 INFO L231 Difference]: Finished difference. Result has 467 places, 678 transitions, 11121 flow [2024-06-14 13:44:55,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10508, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11121, PETRI_PLACES=467, PETRI_TRANSITIONS=678} [2024-06-14 13:44:55,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-14 13:44:55,817 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 678 transitions, 11121 flow [2024-06-14 13:44:55,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:55,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:44:55,818 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] [2024-06-14 13:44:55,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:44:55,818 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)] === [2024-06-14 13:44:55,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:44:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash 157314357, now seen corresponding path program 11 times [2024-06-14 13:44:55,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:44:55,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36166799] [2024-06-14 13:44:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:44:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:44:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:44:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:44:57,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:44:57,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36166799] [2024-06-14 13:44:57,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36166799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:44:57,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:44:57,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:44:57,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059825723] [2024-06-14 13:44:57,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:44:57,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:44:57,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:44:57,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:44:57,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:44:57,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:44:57,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 678 transitions, 11121 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:44:57,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:44:57,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:44:57,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:44:59,396 INFO L124 PetriNetUnfolderBase]: 5134/8110 cut-off events. [2024-06-14 13:44:59,396 INFO L125 PetriNetUnfolderBase]: For 2207430/2207432 co-relation queries the response was YES. [2024-06-14 13:44:59,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86316 conditions, 8110 events. 5134/8110 cut-off events. For 2207430/2207432 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 51578 event pairs, 1094 based on Foata normal form. 20/8127 useless extension candidates. Maximal degree in co-relation 86095. Up to 7129 conditions per place. [2024-06-14 13:44:59,541 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 530 selfloop transitions, 169 changer transitions 0/704 dead transitions. [2024-06-14 13:44:59,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 704 transitions, 12772 flow [2024-06-14 13:44:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:44:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:44:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:44:59,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 13:44:59,542 INFO L175 Difference]: Start difference. First operand has 467 places, 678 transitions, 11121 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:44:59,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 704 transitions, 12772 flow [2024-06-14 13:45:09,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 704 transitions, 11914 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-14 13:45:09,977 INFO L231 Difference]: Finished difference. Result has 469 places, 682 transitions, 10780 flow [2024-06-14 13:45:09,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10283, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10780, PETRI_PLACES=469, PETRI_TRANSITIONS=682} [2024-06-14 13:45:09,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-14 13:45:09,977 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 682 transitions, 10780 flow [2024-06-14 13:45:09,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:09,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:09,978 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, 1] [2024-06-14 13:45:09,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:45:09,978 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)] === [2024-06-14 13:45:09,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2142037003, now seen corresponding path program 1 times [2024-06-14 13:45:09,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:09,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864781171] [2024-06-14 13:45:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:09,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:10,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:10,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864781171] [2024-06-14 13:45:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864781171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:10,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:45:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985420707] [2024-06-14 13:45:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:45:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:45:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:45:10,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:45:10,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 682 transitions, 10780 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:10,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:10,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:45:10,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:13,455 INFO L124 PetriNetUnfolderBase]: 5144/8124 cut-off events. [2024-06-14 13:45:13,455 INFO L125 PetriNetUnfolderBase]: For 2029806/2029806 co-relation queries the response was YES. [2024-06-14 13:45:13,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84535 conditions, 8124 events. 5144/8124 cut-off events. For 2029806/2029806 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 51639 event pairs, 1068 based on Foata normal form. 2/8125 useless extension candidates. Maximal degree in co-relation 84314. Up to 7697 conditions per place. [2024-06-14 13:45:13,589 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 654 selfloop transitions, 62 changer transitions 0/721 dead transitions. [2024-06-14 13:45:13,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 721 transitions, 12495 flow [2024-06-14 13:45:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:45:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:45:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:45:13,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 13:45:13,590 INFO L175 Difference]: Start difference. First operand has 469 places, 682 transitions, 10780 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:45:13,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 721 transitions, 12495 flow [2024-06-14 13:45:20,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 721 transitions, 12034 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-06-14 13:45:20,680 INFO L231 Difference]: Finished difference. Result has 469 places, 692 transitions, 10632 flow [2024-06-14 13:45:20,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10319, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10632, PETRI_PLACES=469, PETRI_TRANSITIONS=692} [2024-06-14 13:45:20,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-14 13:45:20,680 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 692 transitions, 10632 flow [2024-06-14 13:45:20,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:20,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:20,681 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, 1] [2024-06-14 13:45:20,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:45:20,681 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)] === [2024-06-14 13:45:20,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:20,681 INFO L85 PathProgramCache]: Analyzing trace with hash 684928047, now seen corresponding path program 2 times [2024-06-14 13:45:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:20,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915693328] [2024-06-14 13:45:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:20,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:21,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915693328] [2024-06-14 13:45:21,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915693328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:21,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:45:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883549011] [2024-06-14 13:45:21,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:45:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:45:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:45:21,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:45:21,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 692 transitions, 10632 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:21,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:21,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:45:21,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:24,015 INFO L124 PetriNetUnfolderBase]: 5154/8133 cut-off events. [2024-06-14 13:45:24,016 INFO L125 PetriNetUnfolderBase]: For 2047432/2047434 co-relation queries the response was YES. [2024-06-14 13:45:24,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84630 conditions, 8133 events. 5154/8133 cut-off events. For 2047432/2047434 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 51665 event pairs, 994 based on Foata normal form. 2/8134 useless extension candidates. Maximal degree in co-relation 84409. Up to 7388 conditions per place. [2024-06-14 13:45:24,163 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 604 selfloop transitions, 122 changer transitions 0/731 dead transitions. [2024-06-14 13:45:24,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 731 transitions, 12377 flow [2024-06-14 13:45:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:45:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:45:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:45:24,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-14 13:45:24,164 INFO L175 Difference]: Start difference. First operand has 469 places, 692 transitions, 10632 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:45:24,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 731 transitions, 12377 flow [2024-06-14 13:45:32,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 731 transitions, 12180 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 13:45:32,274 INFO L231 Difference]: Finished difference. Result has 475 places, 701 transitions, 10881 flow [2024-06-14 13:45:32,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10435, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10881, PETRI_PLACES=475, PETRI_TRANSITIONS=701} [2024-06-14 13:45:32,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 13:45:32,274 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 701 transitions, 10881 flow [2024-06-14 13:45:32,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:32,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:32,275 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, 1] [2024-06-14 13:45:32,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:45:32,275 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)] === [2024-06-14 13:45:32,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:32,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1640756981, now seen corresponding path program 3 times [2024-06-14 13:45:32,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:32,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251379294] [2024-06-14 13:45:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:32,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:32,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:32,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251379294] [2024-06-14 13:45:32,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251379294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:32,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:32,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:45:32,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851060636] [2024-06-14 13:45:32,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:32,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:45:32,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:32,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:45:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:45:33,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:45:33,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 701 transitions, 10881 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:33,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:33,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:45:33,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:35,704 INFO L124 PetriNetUnfolderBase]: 5180/8165 cut-off events. [2024-06-14 13:45:35,704 INFO L125 PetriNetUnfolderBase]: For 2105128/2105130 co-relation queries the response was YES. [2024-06-14 13:45:35,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87247 conditions, 8165 events. 5180/8165 cut-off events. For 2105128/2105130 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51886 event pairs, 991 based on Foata normal form. 2/8166 useless extension candidates. Maximal degree in co-relation 87023. Up to 7387 conditions per place. [2024-06-14 13:45:35,845 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 600 selfloop transitions, 131 changer transitions 0/736 dead transitions. [2024-06-14 13:45:35,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 736 transitions, 13026 flow [2024-06-14 13:45:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:45:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:45:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:45:35,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-14 13:45:35,847 INFO L175 Difference]: Start difference. First operand has 475 places, 701 transitions, 10881 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:45:35,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 736 transitions, 13026 flow [2024-06-14 13:45:45,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 736 transitions, 12744 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 13:45:45,791 INFO L231 Difference]: Finished difference. Result has 480 places, 707 transitions, 11129 flow [2024-06-14 13:45:45,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10599, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11129, PETRI_PLACES=480, PETRI_TRANSITIONS=707} [2024-06-14 13:45:45,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-14 13:45:45,791 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 707 transitions, 11129 flow [2024-06-14 13:45:45,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:45,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:45:45,792 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, 1] [2024-06-14 13:45:45,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:45:45,792 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)] === [2024-06-14 13:45:45,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:45:45,792 INFO L85 PathProgramCache]: Analyzing trace with hash 485626257, now seen corresponding path program 4 times [2024-06-14 13:45:45,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:45:45,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924789936] [2024-06-14 13:45:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:45:45,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:45:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:45:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:45:46,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:45:46,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924789936] [2024-06-14 13:45:46,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924789936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:45:46,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:45:46,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:45:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071497994] [2024-06-14 13:45:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:45:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:45:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:45:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:45:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:45:46,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:45:46,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 707 transitions, 11129 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:45:46,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:45:46,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:45:46,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:45:49,272 INFO L124 PetriNetUnfolderBase]: 5174/8158 cut-off events. [2024-06-14 13:45:49,273 INFO L125 PetriNetUnfolderBase]: For 2114767/2114769 co-relation queries the response was YES. [2024-06-14 13:45:49,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87442 conditions, 8158 events. 5174/8158 cut-off events. For 2114767/2114769 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51778 event pairs, 1005 based on Foata normal form. 2/8159 useless extension candidates. Maximal degree in co-relation 87217. Up to 7416 conditions per place. [2024-06-14 13:45:49,410 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 609 selfloop transitions, 121 changer transitions 0/735 dead transitions. [2024-06-14 13:45:49,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 735 transitions, 12720 flow [2024-06-14 13:45:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:45:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:45:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:45:49,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 13:45:49,411 INFO L175 Difference]: Start difference. First operand has 480 places, 707 transitions, 11129 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:45:49,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 735 transitions, 12720 flow [2024-06-14 13:46:00,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 735 transitions, 12348 flow, removed 116 selfloop flow, removed 5 redundant places. [2024-06-14 13:46:01,003 INFO L231 Difference]: Finished difference. Result has 484 places, 707 transitions, 11009 flow [2024-06-14 13:46:01,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10761, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11009, PETRI_PLACES=484, PETRI_TRANSITIONS=707} [2024-06-14 13:46:01,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-14 13:46:01,004 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 707 transitions, 11009 flow [2024-06-14 13:46:01,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:01,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:01,004 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, 1] [2024-06-14 13:46:01,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:46:01,004 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)] === [2024-06-14 13:46:01,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash 469293137, now seen corresponding path program 5 times [2024-06-14 13:46:01,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:01,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622691750] [2024-06-14 13:46:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:01,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:01,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:01,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622691750] [2024-06-14 13:46:01,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622691750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:01,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:01,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:46:01,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272735416] [2024-06-14 13:46:01,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:01,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:46:01,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:01,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:46:01,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:46:01,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:46:01,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 707 transitions, 11009 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:01,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:01,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:46:01,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:04,331 INFO L124 PetriNetUnfolderBase]: 5192/8185 cut-off events. [2024-06-14 13:46:04,332 INFO L125 PetriNetUnfolderBase]: For 2154050/2154052 co-relation queries the response was YES. [2024-06-14 13:46:04,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87736 conditions, 8185 events. 5192/8185 cut-off events. For 2154050/2154052 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 51958 event pairs, 1009 based on Foata normal form. 2/8186 useless extension candidates. Maximal degree in co-relation 87509. Up to 7420 conditions per place. [2024-06-14 13:46:04,486 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 604 selfloop transitions, 131 changer transitions 0/740 dead transitions. [2024-06-14 13:46:04,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 740 transitions, 13160 flow [2024-06-14 13:46:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:46:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:46:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:46:04,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 13:46:04,487 INFO L175 Difference]: Start difference. First operand has 484 places, 707 transitions, 11009 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:46:04,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 740 transitions, 13160 flow [2024-06-14 13:46:13,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 740 transitions, 12874 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:46:13,434 INFO L231 Difference]: Finished difference. Result has 485 places, 713 transitions, 11265 flow [2024-06-14 13:46:13,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10723, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11265, PETRI_PLACES=485, PETRI_TRANSITIONS=713} [2024-06-14 13:46:13,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-14 13:46:13,435 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 713 transitions, 11265 flow [2024-06-14 13:46:13,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:13,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:13,435 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, 1] [2024-06-14 13:46:13,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:46:13,436 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)] === [2024-06-14 13:46:13,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 485746413, now seen corresponding path program 1 times [2024-06-14 13:46:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:13,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446678480] [2024-06-14 13:46:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:13,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:14,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446678480] [2024-06-14 13:46:14,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446678480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:14,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:14,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:46:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710291305] [2024-06-14 13:46:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:14,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:46:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:46:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:46:14,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:46:14,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 713 transitions, 11265 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:14,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:14,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:46:14,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:17,045 INFO L124 PetriNetUnfolderBase]: 5197/8192 cut-off events. [2024-06-14 13:46:17,045 INFO L125 PetriNetUnfolderBase]: For 2177638/2177638 co-relation queries the response was YES. [2024-06-14 13:46:17,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88479 conditions, 8192 events. 5197/8192 cut-off events. For 2177638/2177638 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 52075 event pairs, 996 based on Foata normal form. 1/8189 useless extension candidates. Maximal degree in co-relation 88252. Up to 7744 conditions per place. [2024-06-14 13:46:17,355 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 662 selfloop transitions, 67 changer transitions 0/734 dead transitions. [2024-06-14 13:46:17,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 734 transitions, 12883 flow [2024-06-14 13:46:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:46:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:46:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:46:17,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 13:46:17,357 INFO L175 Difference]: Start difference. First operand has 485 places, 713 transitions, 11265 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:46:17,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 734 transitions, 12883 flow [2024-06-14 13:46:26,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 734 transitions, 12581 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-14 13:46:26,565 INFO L231 Difference]: Finished difference. Result has 488 places, 716 transitions, 11194 flow [2024-06-14 13:46:26,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10963, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11194, PETRI_PLACES=488, PETRI_TRANSITIONS=716} [2024-06-14 13:46:26,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-14 13:46:26,566 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 716 transitions, 11194 flow [2024-06-14 13:46:26,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:26,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:26,566 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, 1] [2024-06-14 13:46:26,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:46:26,566 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)] === [2024-06-14 13:46:26,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:26,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1742563585, now seen corresponding path program 6 times [2024-06-14 13:46:26,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:26,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934746320] [2024-06-14 13:46:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:26,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:27,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934746320] [2024-06-14 13:46:27,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934746320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:27,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:27,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:46:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830634841] [2024-06-14 13:46:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:46:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:46:27,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:46:27,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:46:27,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 716 transitions, 11194 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:27,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:27,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:46:27,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:30,276 INFO L124 PetriNetUnfolderBase]: 5231/8249 cut-off events. [2024-06-14 13:46:30,277 INFO L125 PetriNetUnfolderBase]: For 2253396/2253398 co-relation queries the response was YES. [2024-06-14 13:46:30,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89902 conditions, 8249 events. 5231/8249 cut-off events. For 2253396/2253398 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52440 event pairs, 998 based on Foata normal form. 2/8250 useless extension candidates. Maximal degree in co-relation 89673. Up to 7387 conditions per place. [2024-06-14 13:46:30,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 594 selfloop transitions, 152 changer transitions 0/751 dead transitions. [2024-06-14 13:46:30,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 751 transitions, 13813 flow [2024-06-14 13:46:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:46:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:46:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:46:30,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 13:46:30,473 INFO L175 Difference]: Start difference. First operand has 488 places, 716 transitions, 11194 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:46:30,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 751 transitions, 13813 flow [2024-06-14 13:46:41,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 751 transitions, 13618 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:46:41,912 INFO L231 Difference]: Finished difference. Result has 491 places, 725 transitions, 11735 flow [2024-06-14 13:46:41,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10999, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11735, PETRI_PLACES=491, PETRI_TRANSITIONS=725} [2024-06-14 13:46:41,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-14 13:46:41,912 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 725 transitions, 11735 flow [2024-06-14 13:46:41,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:41,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:41,913 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, 1] [2024-06-14 13:46:41,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:46:41,913 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)] === [2024-06-14 13:46:41,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2075228079, now seen corresponding path program 2 times [2024-06-14 13:46:41,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:41,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255831509] [2024-06-14 13:46:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:41,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:42,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255831509] [2024-06-14 13:46:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255831509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:42,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:42,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:46:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945510981] [2024-06-14 13:46:42,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:46:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:46:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:46:42,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:46:42,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 725 transitions, 11735 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:42,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:42,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:46:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:45,336 INFO L124 PetriNetUnfolderBase]: 5236/8241 cut-off events. [2024-06-14 13:46:45,336 INFO L125 PetriNetUnfolderBase]: For 2281754/2281754 co-relation queries the response was YES. [2024-06-14 13:46:45,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90896 conditions, 8241 events. 5236/8241 cut-off events. For 2281754/2281754 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 52325 event pairs, 1021 based on Foata normal form. 1/8237 useless extension candidates. Maximal degree in co-relation 90666. Up to 7735 conditions per place. [2024-06-14 13:46:45,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 645 selfloop transitions, 94 changer transitions 0/744 dead transitions. [2024-06-14 13:46:45,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 744 transitions, 13663 flow [2024-06-14 13:46:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:46:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:46:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:46:45,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 13:46:45,476 INFO L175 Difference]: Start difference. First operand has 491 places, 725 transitions, 11735 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:46:45,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 744 transitions, 13663 flow [2024-06-14 13:46:54,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 744 transitions, 13327 flow, removed 107 selfloop flow, removed 4 redundant places. [2024-06-14 13:46:54,660 INFO L231 Difference]: Finished difference. Result has 495 places, 728 transitions, 11683 flow [2024-06-14 13:46:54,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11399, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11683, PETRI_PLACES=495, PETRI_TRANSITIONS=728} [2024-06-14 13:46:54,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-14 13:46:54,661 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 728 transitions, 11683 flow [2024-06-14 13:46:54,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:54,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:46:54,662 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, 1] [2024-06-14 13:46:54,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:46:54,662 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)] === [2024-06-14 13:46:54,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:46:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1901208813, now seen corresponding path program 3 times [2024-06-14 13:46:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:46:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786459744] [2024-06-14 13:46:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:46:54,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:46:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:46:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:46:55,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:46:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786459744] [2024-06-14 13:46:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786459744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:46:55,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:46:55,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:46:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947699195] [2024-06-14 13:46:55,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:46:55,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:46:55,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:46:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:46:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:46:55,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:46:55,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 728 transitions, 11683 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:46:55,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:46:55,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:46:55,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:46:57,852 INFO L124 PetriNetUnfolderBase]: 5241/8253 cut-off events. [2024-06-14 13:46:57,852 INFO L125 PetriNetUnfolderBase]: For 2291246/2291246 co-relation queries the response was YES. [2024-06-14 13:46:57,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90054 conditions, 8253 events. 5241/8253 cut-off events. For 2291246/2291246 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 52451 event pairs, 1025 based on Foata normal form. 1/8249 useless extension candidates. Maximal degree in co-relation 89822. Up to 7804 conditions per place. [2024-06-14 13:46:58,027 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 666 selfloop transitions, 74 changer transitions 0/745 dead transitions. [2024-06-14 13:46:58,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 745 transitions, 13317 flow [2024-06-14 13:46:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:46:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:46:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:46:58,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 13:46:58,029 INFO L175 Difference]: Start difference. First operand has 495 places, 728 transitions, 11683 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:46:58,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 745 transitions, 13317 flow [2024-06-14 13:47:08,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 745 transitions, 13028 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 13:47:08,568 INFO L231 Difference]: Finished difference. Result has 496 places, 731 transitions, 11658 flow [2024-06-14 13:47:08,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11404, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11658, PETRI_PLACES=496, PETRI_TRANSITIONS=731} [2024-06-14 13:47:08,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-14 13:47:08,569 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 731 transitions, 11658 flow [2024-06-14 13:47:08,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:08,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:08,569 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, 1] [2024-06-14 13:47:08,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:47:08,569 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:08,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1901208627, now seen corresponding path program 7 times [2024-06-14 13:47:08,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:08,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128566199] [2024-06-14 13:47:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:08,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:09,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:09,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128566199] [2024-06-14 13:47:09,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128566199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:09,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:09,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:47:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485375156] [2024-06-14 13:47:09,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:47:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:47:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:47:09,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:47:09,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 731 transitions, 11658 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:09,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:09,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:47:09,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:12,018 INFO L124 PetriNetUnfolderBase]: 5259/8297 cut-off events. [2024-06-14 13:47:12,018 INFO L125 PetriNetUnfolderBase]: For 2343606/2343606 co-relation queries the response was YES. [2024-06-14 13:47:12,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90715 conditions, 8297 events. 5259/8297 cut-off events. For 2343606/2343606 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 52861 event pairs, 1010 based on Foata normal form. 2/8298 useless extension candidates. Maximal degree in co-relation 90482. Up to 7836 conditions per place. [2024-06-14 13:47:12,158 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 691 selfloop transitions, 68 changer transitions 0/764 dead transitions. [2024-06-14 13:47:12,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 764 transitions, 13814 flow [2024-06-14 13:47:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:47:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:47:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:47:12,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 13:47:12,159 INFO L175 Difference]: Start difference. First operand has 496 places, 731 transitions, 11658 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:47:12,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 764 transitions, 13814 flow [2024-06-14 13:47:22,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 764 transitions, 13622 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:47:22,735 INFO L231 Difference]: Finished difference. Result has 501 places, 737 transitions, 11862 flow [2024-06-14 13:47:22,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11466, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11862, PETRI_PLACES=501, PETRI_TRANSITIONS=737} [2024-06-14 13:47:22,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-14 13:47:22,735 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 737 transitions, 11862 flow [2024-06-14 13:47:22,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:22,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:22,736 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, 1] [2024-06-14 13:47:22,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:47:22,736 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:22,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 810487347, now seen corresponding path program 8 times [2024-06-14 13:47:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170444717] [2024-06-14 13:47:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:23,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:23,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170444717] [2024-06-14 13:47:23,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170444717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:23,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:23,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:47:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806879639] [2024-06-14 13:47:23,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:23,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:47:23,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:47:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:47:23,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:47:23,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 737 transitions, 11862 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:23,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:23,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:47:23,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:26,163 INFO L124 PetriNetUnfolderBase]: 5253/8280 cut-off events. [2024-06-14 13:47:26,163 INFO L125 PetriNetUnfolderBase]: For 2349649/2349651 co-relation queries the response was YES. [2024-06-14 13:47:26,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90485 conditions, 8280 events. 5253/8280 cut-off events. For 2349649/2349651 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 52709 event pairs, 995 based on Foata normal form. 2/8281 useless extension candidates. Maximal degree in co-relation 90250. Up to 7415 conditions per place. [2024-06-14 13:47:26,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 600 selfloop transitions, 158 changer transitions 0/763 dead transitions. [2024-06-14 13:47:26,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 763 transitions, 14101 flow [2024-06-14 13:47:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:47:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:47:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:47:26,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 13:47:26,304 INFO L175 Difference]: Start difference. First operand has 501 places, 737 transitions, 11862 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:47:26,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 763 transitions, 14101 flow [2024-06-14 13:47:36,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 763 transitions, 13801 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-14 13:47:36,644 INFO L231 Difference]: Finished difference. Result has 504 places, 737 transitions, 11884 flow [2024-06-14 13:47:36,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11562, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11884, PETRI_PLACES=504, PETRI_TRANSITIONS=737} [2024-06-14 13:47:36,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-14 13:47:36,645 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 737 transitions, 11884 flow [2024-06-14 13:47:36,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:36,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:36,645 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, 1] [2024-06-14 13:47:36,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:47:36,645 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:36,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:36,645 INFO L85 PathProgramCache]: Analyzing trace with hash 810487533, now seen corresponding path program 4 times [2024-06-14 13:47:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:36,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664281502] [2024-06-14 13:47:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:36,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:37,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:37,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664281502] [2024-06-14 13:47:37,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664281502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:37,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:37,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:47:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956795901] [2024-06-14 13:47:37,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:37,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:47:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:47:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:47:37,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:47:37,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 737 transitions, 11884 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:37,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:37,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:47:37,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:39,947 INFO L124 PetriNetUnfolderBase]: 5250/8263 cut-off events. [2024-06-14 13:47:39,947 INFO L125 PetriNetUnfolderBase]: For 2354650/2354650 co-relation queries the response was YES. [2024-06-14 13:47:40,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90449 conditions, 8263 events. 5250/8263 cut-off events. For 2354650/2354650 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 52558 event pairs, 1022 based on Foata normal form. 1/8259 useless extension candidates. Maximal degree in co-relation 90213. Up to 7755 conditions per place. [2024-06-14 13:47:40,084 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 655 selfloop transitions, 92 changer transitions 0/752 dead transitions. [2024-06-14 13:47:40,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 752 transitions, 13438 flow [2024-06-14 13:47:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:47:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:47:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:47:40,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 13:47:40,086 INFO L175 Difference]: Start difference. First operand has 504 places, 737 transitions, 11884 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:47:40,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 752 transitions, 13438 flow [2024-06-14 13:47:49,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 752 transitions, 12919 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-14 13:47:49,408 INFO L231 Difference]: Finished difference. Result has 503 places, 737 transitions, 11557 flow [2024-06-14 13:47:49,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11365, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11557, PETRI_PLACES=503, PETRI_TRANSITIONS=737} [2024-06-14 13:47:49,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-14 13:47:49,409 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 737 transitions, 11557 flow [2024-06-14 13:47:49,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:49,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:47:49,409 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, 1] [2024-06-14 13:47:49,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 13:47:49,410 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:47:49,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:47:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash -503628561, now seen corresponding path program 5 times [2024-06-14 13:47:49,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:47:49,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844060056] [2024-06-14 13:47:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:47:49,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:47:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:47:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:47:50,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:47:50,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844060056] [2024-06-14 13:47:50,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844060056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:47:50,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:47:50,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:47:50,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039581184] [2024-06-14 13:47:50,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:47:50,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:47:50,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:47:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:47:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:47:50,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:47:50,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 737 transitions, 11557 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:47:50,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:47:50,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:47:50,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:47:52,996 INFO L124 PetriNetUnfolderBase]: 5268/8297 cut-off events. [2024-06-14 13:47:52,997 INFO L125 PetriNetUnfolderBase]: For 2394967/2394967 co-relation queries the response was YES. [2024-06-14 13:47:53,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90377 conditions, 8297 events. 5268/8297 cut-off events. For 2394967/2394967 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52839 event pairs, 1024 based on Foata normal form. 1/8293 useless extension candidates. Maximal degree in co-relation 90142. Up to 7756 conditions per place. [2024-06-14 13:47:53,187 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 638 selfloop transitions, 119 changer transitions 0/762 dead transitions. [2024-06-14 13:47:53,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 762 transitions, 13637 flow [2024-06-14 13:47:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:47:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:47:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:47:53,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 13:47:53,189 INFO L175 Difference]: Start difference. First operand has 503 places, 737 transitions, 11557 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:47:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 762 transitions, 13637 flow [2024-06-14 13:48:04,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 762 transitions, 13412 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:48:04,365 INFO L231 Difference]: Finished difference. Result has 505 places, 746 transitions, 11824 flow [2024-06-14 13:48:04,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11332, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11824, PETRI_PLACES=505, PETRI_TRANSITIONS=746} [2024-06-14 13:48:04,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-14 13:48:04,366 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 746 transitions, 11824 flow [2024-06-14 13:48:04,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:04,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:48:04,366 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, 1] [2024-06-14 13:48:04,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 13:48:04,366 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:48:04,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:48:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash -503635071, now seen corresponding path program 6 times [2024-06-14 13:48:04,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:48:04,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789412946] [2024-06-14 13:48:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:48:04,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:48:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:48:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:48:05,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:48:05,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789412946] [2024-06-14 13:48:05,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789412946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:48:05,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:48:05,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:48:05,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584048009] [2024-06-14 13:48:05,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:48:05,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:48:05,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:48:05,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:48:05,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:48:05,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:48:05,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 746 transitions, 11824 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:05,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:48:05,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:48:05,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:48:07,847 INFO L124 PetriNetUnfolderBase]: 5265/8297 cut-off events. [2024-06-14 13:48:07,847 INFO L125 PetriNetUnfolderBase]: For 2412585/2412585 co-relation queries the response was YES. [2024-06-14 13:48:07,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90496 conditions, 8297 events. 5265/8297 cut-off events. For 2412585/2412585 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52833 event pairs, 1024 based on Foata normal form. 1/8293 useless extension candidates. Maximal degree in co-relation 90259. Up to 7753 conditions per place. [2024-06-14 13:48:07,986 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 645 selfloop transitions, 111 changer transitions 0/761 dead transitions. [2024-06-14 13:48:07,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 761 transitions, 13396 flow [2024-06-14 13:48:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:48:07,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:48:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:48:07,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 13:48:07,987 INFO L175 Difference]: Start difference. First operand has 505 places, 746 transitions, 11824 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:48:07,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 761 transitions, 13396 flow [2024-06-14 13:48:18,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 761 transitions, 13152 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-14 13:48:18,992 INFO L231 Difference]: Finished difference. Result has 508 places, 746 transitions, 11816 flow [2024-06-14 13:48:18,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11580, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11816, PETRI_PLACES=508, PETRI_TRANSITIONS=746} [2024-06-14 13:48:18,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-14 13:48:18,992 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 746 transitions, 11816 flow [2024-06-14 13:48:18,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:18,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:48:18,993 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, 1] [2024-06-14 13:48:18,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 13:48:18,993 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:48:18,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:48:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1905850257, now seen corresponding path program 9 times [2024-06-14 13:48:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:48:18,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139031077] [2024-06-14 13:48:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:48:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:48:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:48:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:48:19,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:48:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139031077] [2024-06-14 13:48:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139031077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:48:19,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:48:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:48:19,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702474310] [2024-06-14 13:48:19,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:48:19,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:48:19,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:48:19,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:48:19,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:48:19,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:48:19,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 746 transitions, 11816 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:19,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:48:19,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:48:19,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:48:22,484 INFO L124 PetriNetUnfolderBase]: 5275/8332 cut-off events. [2024-06-14 13:48:22,484 INFO L125 PetriNetUnfolderBase]: For 2424400/2424400 co-relation queries the response was YES. [2024-06-14 13:48:22,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90924 conditions, 8332 events. 5275/8332 cut-off events. For 2424400/2424400 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 53234 event pairs, 1011 based on Foata normal form. 2/8333 useless extension candidates. Maximal degree in co-relation 90686. Up to 7837 conditions per place. [2024-06-14 13:48:22,755 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 696 selfloop transitions, 76 changer transitions 0/777 dead transitions. [2024-06-14 13:48:22,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 777 transitions, 13918 flow [2024-06-14 13:48:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:48:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:48:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:48:22,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-14 13:48:22,757 INFO L175 Difference]: Start difference. First operand has 508 places, 746 transitions, 11816 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:48:22,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 777 transitions, 13918 flow [2024-06-14 13:48:33,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 777 transitions, 13745 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:48:33,275 INFO L231 Difference]: Finished difference. Result has 512 places, 749 transitions, 11943 flow [2024-06-14 13:48:33,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11645, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11943, PETRI_PLACES=512, PETRI_TRANSITIONS=749} [2024-06-14 13:48:33,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-14 13:48:33,276 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 749 transitions, 11943 flow [2024-06-14 13:48:33,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:33,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:48:33,276 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, 1] [2024-06-14 13:48:33,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 13:48:33,276 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:48:33,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:48:33,277 INFO L85 PathProgramCache]: Analyzing trace with hash 966315637, now seen corresponding path program 7 times [2024-06-14 13:48:33,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:48:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761536277] [2024-06-14 13:48:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:48:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:48:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:48:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:48:33,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:48:33,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761536277] [2024-06-14 13:48:33,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761536277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:48:33,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:48:33,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:48:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148916673] [2024-06-14 13:48:33,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:48:33,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:48:33,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:48:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:48:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:48:33,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 13:48:33,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 749 transitions, 11943 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:48:33,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:48:33,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 13:48:33,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:48:36,504 INFO L124 PetriNetUnfolderBase]: 5288/8328 cut-off events. [2024-06-14 13:48:36,505 INFO L125 PetriNetUnfolderBase]: For 2432445/2432449 co-relation queries the response was YES. [2024-06-14 13:48:36,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91743 conditions, 8328 events. 5288/8328 cut-off events. For 2432445/2432449 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 53069 event pairs, 1051 based on Foata normal form. 5/8327 useless extension candidates. Maximal degree in co-relation 91505. Up to 7662 conditions per place. [2024-06-14 13:48:36,644 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 605 selfloop transitions, 159 changer transitions 0/769 dead transitions. [2024-06-14 13:48:36,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 769 transitions, 14315 flow [2024-06-14 13:48:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:48:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:48:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:48:36,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 13:48:36,645 INFO L175 Difference]: Start difference. First operand has 512 places, 749 transitions, 11943 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:48:36,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 769 transitions, 14315 flow Killed by 15