./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:52:46,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:52:46,142 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:52:46,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:52:46,148 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:52:46,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:52:46,174 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:52:46,174 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:52:46,175 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:52:46,178 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:52:46,178 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:52:46,179 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:52:46,179 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:52:46,180 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:52:46,181 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:52:46,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:52:46,181 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:52:46,181 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:52:46,182 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:52:46,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:52:46,183 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:52:46,183 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:52:46,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:52:46,184 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:52:46,184 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:52:46,184 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:52:46,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:52:46,184 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:52:46,185 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:52:46,185 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:52:46,186 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:52:46,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:52:46,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:52:46,186 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:52:46,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:52:46,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:52:46,187 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:52:46,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:52:46,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:52:46,188 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:52:46,188 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:52:46,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:52:46,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:52:46,188 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:52:46,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:52:46,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:52:46,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:52:46,425 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:52:46,425 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:52:46,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:52:47,534 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:52:47,781 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:52:47,788 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:52:47,805 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd488dfcd/56608a659d8a4cd3909522d03a2afeca/FLAGd22a34f4f [2024-06-04 14:52:47,815 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd488dfcd/56608a659d8a4cd3909522d03a2afeca [2024-06-04 14:52:47,817 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:52:47,817 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:52:47,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-04 14:52:47,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:52:47,933 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:52:47,934 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:52:47,934 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:52:47,938 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:52:47,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:52:47" (1/2) ... [2024-06-04 14:52:47,939 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e70cc4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:52:47, skipping insertion in model container [2024-06-04 14:52:47,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:52:47" (1/2) ... [2024-06-04 14:52:47,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1aa24ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:52:47, skipping insertion in model container [2024-06-04 14:52:47,940 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:52:47" (2/2) ... [2024-06-04 14:52:47,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e70cc4c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:47, skipping insertion in model container [2024-06-04 14:52:47,941 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:52:47" (2/2) ... [2024-06-04 14:52:47,941 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:52:48,059 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:52:48,061 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-04 14:52:48,061 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-04 14:52:48,061 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-04 14:52:48,061 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:52:48,061 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-04 14:52:48,100 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:52:48,411 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:52:48,424 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:52:48,519 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:52:48,554 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:52:48,555 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48 WrapperNode [2024-06-04 14:52:48,555 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:52:48,556 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:52:48,556 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:52:48,556 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:52:48,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,648 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-04 14:52:48,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:52:48,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:52:48,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:52:48,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:52:48,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,699 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 14:52:48,700 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,700 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,710 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,726 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:52:48,727 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:52:48,727 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:52:48,727 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:52:48,740 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (1/1) ... [2024-06-04 14:52:48,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:52:48,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:52:48,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 14:52:48,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 14:52:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:52:48,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:52:48,817 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:52:48,817 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:52:48,817 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:52:48,818 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:52:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:52:48,818 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:52:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:52:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:52:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:52:48,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:52:48,819 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:52:48,953 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:52:48,955 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:52:49,252 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:52:49,252 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:52:49,393 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:52:49,393 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:52:49,394 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:52:49 BoogieIcfgContainer [2024-06-04 14:52:49,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:52:49,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:52:49,397 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:52:49,400 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:52:49,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:52:47" (1/4) ... [2024-06-04 14:52:49,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d5855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:52:49, skipping insertion in model container [2024-06-04 14:52:49,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:52:47" (2/4) ... [2024-06-04 14:52:49,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d5855 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:52:49, skipping insertion in model container [2024-06-04 14:52:49,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:52:48" (3/4) ... [2024-06-04 14:52:49,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d5855 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:52:49, skipping insertion in model container [2024-06-04 14:52:49,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:52:49" (4/4) ... [2024-06-04 14:52:49,403 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:52:49,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:52:49,417 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:52:49,417 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:52:49,466 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:52:49,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:52:49,623 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 14:52:49,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:52:49,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:52:49,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:52:49,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 14:52:49,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:52:49,644 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;@32086f6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:52:49,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:52:49,647 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:52:49,647 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-04 14:52:49,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:52:49,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:49,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:52:49,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:49,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1315925462, now seen corresponding path program 1 times [2024-06-04 14:52:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:49,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160305342] [2024-06-04 14:52:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:50,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:50,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160305342] [2024-06-04 14:52:50,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160305342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:50,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:50,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:52:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353625799] [2024-06-04 14:52:50,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:50,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:52:50,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:52:50,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:52:50,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:52:50,715 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) [2024-06-04 14:52:50,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:50,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:52:50,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:51,153 INFO L124 PetriNetUnfolderBase]: 1363/2123 cut-off events. [2024-06-04 14:52:51,154 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-04 14:52:51,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4249 conditions, 2123 events. 1363/2123 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10305 event pairs, 964 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 4234. Up to 2037 conditions per place. [2024-06-04 14:52:51,176 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 14:52:51,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-04 14:52:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:52:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:52:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-04 14:52:51,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 14:52:51,191 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 74 transitions. [2024-06-04 14:52:51,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-04 14:52:51,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:51,197 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 14:52:51,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-04 14:52:51,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 14:52:51,202 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 14:52:51,202 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) [2024-06-04 14:52:51,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:51,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:52:51,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:51,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1883946295, now seen corresponding path program 1 times [2024-06-04 14:52:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:51,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384349669] [2024-06-04 14:52:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:51,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:51,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384349669] [2024-06-04 14:52:51,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384349669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:51,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:51,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:52:51,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621323864] [2024-06-04 14:52:51,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:51,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:52:51,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:51,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:52:51,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:52:51,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:52:51,854 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) [2024-06-04 14:52:51,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:51,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:52:51,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:52,105 INFO L124 PetriNetUnfolderBase]: 1357/2119 cut-off events. [2024-06-04 14:52:52,106 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-04 14:52:52,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4788 conditions, 2119 events. 1357/2119 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10318 event pairs, 840 based on Foata normal form. 3/2110 useless extension candidates. Maximal degree in co-relation 4773. Up to 2013 conditions per place. [2024-06-04 14:52:52,118 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-04 14:52:52,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 244 flow [2024-06-04 14:52:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:52:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:52:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-04 14:52:52,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-04 14:52:52,122 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 95 transitions. [2024-06-04 14:52:52,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 244 flow [2024-06-04 14:52:52,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:52:52,125 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-04 14:52:52,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-04 14:52:52,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-04 14:52:52,126 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-04 14:52:52,127 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) [2024-06-04 14:52:52,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:52,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:52,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:52:52,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:52,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1727208237, now seen corresponding path program 1 times [2024-06-04 14:52:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:52,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779767566] [2024-06-04 14:52:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:52,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:52,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:52,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779767566] [2024-06-04 14:52:52,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779767566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:52,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:52,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:52:52,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997489136] [2024-06-04 14:52:52,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:52,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:52:52,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:52,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:52:52,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:52:52,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:52:52,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:52,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:52,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:52:52,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:53,202 INFO L124 PetriNetUnfolderBase]: 1411/2218 cut-off events. [2024-06-04 14:52:53,202 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2024-06-04 14:52:53,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 2218 events. 1411/2218 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10858 event pairs, 629 based on Foata normal form. 7/2220 useless extension candidates. Maximal degree in co-relation 5531. Up to 1982 conditions per place. [2024-06-04 14:52:53,212 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 56 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-04 14:52:53,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 406 flow [2024-06-04 14:52:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:52:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:52:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 14:52:53,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:52:53,214 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 126 transitions. [2024-06-04 14:52:53,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 406 flow [2024-06-04 14:52:53,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 77 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:52:53,217 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 239 flow [2024-06-04 14:52:53,217 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-04 14:52:53,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-04 14:52:53,218 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 239 flow [2024-06-04 14:52:53,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:53,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:53,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:53,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:52:53,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:53,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2003849064, now seen corresponding path program 1 times [2024-06-04 14:52:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:53,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072253749] [2024-06-04 14:52:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:53,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:53,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:53,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072253749] [2024-06-04 14:52:53,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072253749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:53,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:53,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:52:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027926222] [2024-06-04 14:52:53,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:53,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:52:53,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:52:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:52:54,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:52:54,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:54,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:54,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:52:54,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:54,400 INFO L124 PetriNetUnfolderBase]: 1433/2263 cut-off events. [2024-06-04 14:52:54,401 INFO L125 PetriNetUnfolderBase]: For 2845/2845 co-relation queries the response was YES. [2024-06-04 14:52:54,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6830 conditions, 2263 events. 1433/2263 cut-off events. For 2845/2845 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11248 event pairs, 476 based on Foata normal form. 7/2269 useless extension candidates. Maximal degree in co-relation 6810. Up to 1925 conditions per place. [2024-06-04 14:52:54,446 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 67 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-04 14:52:54,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 100 transitions, 635 flow [2024-06-04 14:52:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:52:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:52:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:52:54,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-04 14:52:54,450 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 239 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:52:54,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 100 transitions, 635 flow [2024-06-04 14:52:54,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 627 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-04 14:52:54,457 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 418 flow [2024-06-04 14:52:54,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-04 14:52:54,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-04 14:52:54,458 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 418 flow [2024-06-04 14:52:54,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:54,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:54,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:54,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:52:54,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:54,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:54,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1130310964, now seen corresponding path program 1 times [2024-06-04 14:52:54,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:54,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238366693] [2024-06-04 14:52:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:54,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238366693] [2024-06-04 14:52:55,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238366693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:55,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:55,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:52:55,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400965186] [2024-06-04 14:52:55,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:55,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:52:55,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:55,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:52:55,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:52:55,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:52:55,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-04 14:52:55,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:55,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:52:55,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:55,926 INFO L124 PetriNetUnfolderBase]: 1550/2462 cut-off events. [2024-06-04 14:52:55,927 INFO L125 PetriNetUnfolderBase]: For 5758/5758 co-relation queries the response was YES. [2024-06-04 14:52:55,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8758 conditions, 2462 events. 1550/2462 cut-off events. For 5758/5758 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12533 event pairs, 342 based on Foata normal form. 30/2491 useless extension candidates. Maximal degree in co-relation 8732. Up to 1955 conditions per place. [2024-06-04 14:52:55,946 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 85 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-04 14:52:55,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 823 flow [2024-06-04 14:52:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:52:55,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 14:52:55,949 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 418 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:52:55,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 823 flow [2024-06-04 14:52:55,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 112 transitions, 799 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-06-04 14:52:55,960 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 495 flow [2024-06-04 14:52:55,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=495, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-04 14:52:55,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-04 14:52:55,962 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 495 flow [2024-06-04 14:52:55,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-04 14:52:55,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:55,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:52:55,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:55,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1264937944, now seen corresponding path program 1 times [2024-06-04 14:52:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648016309] [2024-06-04 14:52:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:56,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648016309] [2024-06-04 14:52:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648016309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:56,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:56,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:52:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637847941] [2024-06-04 14:52:56,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:56,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:52:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:52:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:52:56,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:56,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 495 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:56,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:56,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:56,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:57,067 INFO L124 PetriNetUnfolderBase]: 1540/2453 cut-off events. [2024-06-04 14:52:57,067 INFO L125 PetriNetUnfolderBase]: For 7059/7059 co-relation queries the response was YES. [2024-06-04 14:52:57,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9204 conditions, 2453 events. 1540/2453 cut-off events. For 7059/7059 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12546 event pairs, 531 based on Foata normal form. 4/2457 useless extension candidates. Maximal degree in co-relation 9174. Up to 2310 conditions per place. [2024-06-04 14:52:57,088 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 63 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-04 14:52:57,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 669 flow [2024-06-04 14:52:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:52:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:52:57,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-04 14:52:57,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-04 14:52:57,090 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 495 flow. Second operand 5 states and 97 transitions. [2024-06-04 14:52:57,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 669 flow [2024-06-04 14:52:57,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 621 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:52:57,097 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 477 flow [2024-06-04 14:52:57,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-04 14:52:57,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-04 14:52:57,100 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 477 flow [2024-06-04 14:52:57,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:57,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:57,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:57,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:52:57,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:57,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:57,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1049514731, now seen corresponding path program 1 times [2024-06-04 14:52:57,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:57,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60772690] [2024-06-04 14:52:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:57,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:57,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:57,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60772690] [2024-06-04 14:52:57,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60772690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:57,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:57,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:52:57,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815696083] [2024-06-04 14:52:57,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:52:57,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:52:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:52:57,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:57,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:57,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:57,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:57,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:58,277 INFO L124 PetriNetUnfolderBase]: 1552/2464 cut-off events. [2024-06-04 14:52:58,278 INFO L125 PetriNetUnfolderBase]: For 7927/7927 co-relation queries the response was YES. [2024-06-04 14:52:58,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9251 conditions, 2464 events. 1552/2464 cut-off events. For 7927/7927 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12516 event pairs, 469 based on Foata normal form. 8/2471 useless extension candidates. Maximal degree in co-relation 9219. Up to 2208 conditions per place. [2024-06-04 14:52:58,296 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 68 selfloop transitions, 19 changer transitions 0/92 dead transitions. [2024-06-04 14:52:58,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 765 flow [2024-06-04 14:52:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:52:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:52:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-04 14:52:58,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-04 14:52:58,298 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 477 flow. Second operand 6 states and 124 transitions. [2024-06-04 14:52:58,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 765 flow [2024-06-04 14:52:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 735 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:52:58,305 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 529 flow [2024-06-04 14:52:58,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=529, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-04 14:52:58,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-04 14:52:58,306 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 529 flow [2024-06-04 14:52:58,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:58,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:58,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:58,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:52:58,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:58,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:58,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1984761879, now seen corresponding path program 2 times [2024-06-04 14:52:58,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:58,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865916913] [2024-06-04 14:52:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:58,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:58,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:58,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865916913] [2024-06-04 14:52:58,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865916913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:58,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:58,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:52:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822932667] [2024-06-04 14:52:58,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:58,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:52:58,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:52:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:52:59,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:52:59,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 529 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:59,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:59,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:52:59,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:59,461 INFO L124 PetriNetUnfolderBase]: 1510/2389 cut-off events. [2024-06-04 14:52:59,461 INFO L125 PetriNetUnfolderBase]: For 8890/8890 co-relation queries the response was YES. [2024-06-04 14:52:59,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9205 conditions, 2389 events. 1510/2389 cut-off events. For 8890/8890 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12003 event pairs, 507 based on Foata normal form. 4/2393 useless extension candidates. Maximal degree in co-relation 9173. Up to 2241 conditions per place. [2024-06-04 14:52:59,475 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 70 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-06-04 14:52:59,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 733 flow [2024-06-04 14:52:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:52:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:52:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 14:52:59,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:52:59,477 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 529 flow. Second operand 6 states and 114 transitions. [2024-06-04 14:52:59,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 733 flow [2024-06-04 14:52:59,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 704 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:59,486 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 530 flow [2024-06-04 14:52:59,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=530, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-06-04 14:52:59,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-04 14:52:59,488 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 530 flow [2024-06-04 14:52:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:59,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:59,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:59,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:52:59,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:59,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1438688905, now seen corresponding path program 1 times [2024-06-04 14:52:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:59,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269681455] [2024-06-04 14:52:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:59,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:00,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:00,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269681455] [2024-06-04 14:53:00,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269681455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:00,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:00,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:00,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244371366] [2024-06-04 14:53:00,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:00,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:00,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:00,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:00,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:00,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 530 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) [2024-06-04 14:53:00,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:00,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:00,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:01,572 INFO L124 PetriNetUnfolderBase]: 1833/2842 cut-off events. [2024-06-04 14:53:01,572 INFO L125 PetriNetUnfolderBase]: For 12152/12152 co-relation queries the response was YES. [2024-06-04 14:53:01,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10952 conditions, 2842 events. 1833/2842 cut-off events. For 12152/12152 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13798 event pairs, 638 based on Foata normal form. 4/2846 useless extension candidates. Maximal degree in co-relation 10919. Up to 2693 conditions per place. [2024-06-04 14:53:01,586 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 76 selfloop transitions, 15 changer transitions 0/95 dead transitions. [2024-06-04 14:53:01,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 810 flow [2024-06-04 14:53:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:01,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 14:53:01,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-04 14:53:01,587 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 530 flow. Second operand 7 states and 125 transitions. [2024-06-04 14:53:01,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 810 flow [2024-06-04 14:53:01,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 756 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:01,597 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 571 flow [2024-06-04 14:53:01,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=571, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-04 14:53:01,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-04 14:53:01,598 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 571 flow [2024-06-04 14:53:01,598 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) [2024-06-04 14:53:01,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:01,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:01,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:53:01,598 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 811846344, now seen corresponding path program 1 times [2024-06-04 14:53:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:01,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309174959] [2024-06-04 14:53:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:02,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:02,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309174959] [2024-06-04 14:53:02,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309174959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:02,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:02,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:53:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634373587] [2024-06-04 14:53:02,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:02,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:53:02,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:53:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:53:02,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:02,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 571 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:02,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:02,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:02,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:02,697 INFO L124 PetriNetUnfolderBase]: 2082/3107 cut-off events. [2024-06-04 14:53:02,698 INFO L125 PetriNetUnfolderBase]: For 16145/16145 co-relation queries the response was YES. [2024-06-04 14:53:02,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12668 conditions, 3107 events. 2082/3107 cut-off events. For 16145/16145 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14464 event pairs, 763 based on Foata normal form. 1/3108 useless extension candidates. Maximal degree in co-relation 12634. Up to 3091 conditions per place. [2024-06-04 14:53:02,713 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 75 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2024-06-04 14:53:02,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 781 flow [2024-06-04 14:53:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:53:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:53:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-04 14:53:02,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 14:53:02,714 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 571 flow. Second operand 5 states and 84 transitions. [2024-06-04 14:53:02,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 781 flow [2024-06-04 14:53:02,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 86 transitions, 740 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:02,726 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 582 flow [2024-06-04 14:53:02,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-04 14:53:02,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-04 14:53:02,727 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 582 flow [2024-06-04 14:53:02,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:02,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:02,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:02,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:53:02,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:02,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:02,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1774718090, now seen corresponding path program 1 times [2024-06-04 14:53:02,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:02,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745084594] [2024-06-04 14:53:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:03,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:03,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745084594] [2024-06-04 14:53:03,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745084594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:03,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:03,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502699586] [2024-06-04 14:53:03,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:03,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:03,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:53:03,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 582 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:03,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:03,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:53:03,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:04,405 INFO L124 PetriNetUnfolderBase]: 1788/2772 cut-off events. [2024-06-04 14:53:04,405 INFO L125 PetriNetUnfolderBase]: For 18317/18319 co-relation queries the response was YES. [2024-06-04 14:53:04,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11785 conditions, 2772 events. 1788/2772 cut-off events. For 18317/18319 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13941 event pairs, 553 based on Foata normal form. 4/2768 useless extension candidates. Maximal degree in co-relation 11750. Up to 2432 conditions per place. [2024-06-04 14:53:04,419 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 68 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-04 14:53:04,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 101 transitions, 848 flow [2024-06-04 14:53:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-04 14:53:04,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-04 14:53:04,420 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 582 flow. Second operand 6 states and 124 transitions. [2024-06-04 14:53:04,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 101 transitions, 848 flow [2024-06-04 14:53:04,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 818 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:04,431 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 647 flow [2024-06-04 14:53:04,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=647, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-04 14:53:04,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-04 14:53:04,432 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 647 flow [2024-06-04 14:53:04,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:04,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:04,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:04,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:53:04,432 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:04,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash 63300694, now seen corresponding path program 1 times [2024-06-04 14:53:04,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:04,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833106486] [2024-06-04 14:53:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:04,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:05,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833106486] [2024-06-04 14:53:05,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833106486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:05,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:05,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:05,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386847236] [2024-06-04 14:53:05,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:05,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:05,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:05,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 647 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) [2024-06-04 14:53:05,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:05,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:05,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:05,937 INFO L124 PetriNetUnfolderBase]: 1930/2957 cut-off events. [2024-06-04 14:53:05,938 INFO L125 PetriNetUnfolderBase]: For 22000/22000 co-relation queries the response was YES. [2024-06-04 14:53:05,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13329 conditions, 2957 events. 1930/2957 cut-off events. For 22000/22000 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14242 event pairs, 670 based on Foata normal form. 2/2959 useless extension candidates. Maximal degree in co-relation 13293. Up to 2783 conditions per place. [2024-06-04 14:53:06,005 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 80 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-04 14:53:06,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 930 flow [2024-06-04 14:53:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 14:53:06,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:53:06,007 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 647 flow. Second operand 7 states and 126 transitions. [2024-06-04 14:53:06,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 930 flow [2024-06-04 14:53:06,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 104 transitions, 861 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:06,020 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 667 flow [2024-06-04 14:53:06,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-06-04 14:53:06,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-04 14:53:06,021 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 667 flow [2024-06-04 14:53:06,021 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) [2024-06-04 14:53:06,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:06,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:06,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:53:06,022 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)] === [2024-06-04 14:53:06,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash -619546162, now seen corresponding path program 1 times [2024-06-04 14:53:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112798267] [2024-06-04 14:53:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:06,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:06,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112798267] [2024-06-04 14:53:06,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112798267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:06,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:06,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:06,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435187792] [2024-06-04 14:53:06,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:06,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:06,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:06,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:06,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 667 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:06,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:06,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:06,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:07,226 INFO L124 PetriNetUnfolderBase]: 2075/3099 cut-off events. [2024-06-04 14:53:07,227 INFO L125 PetriNetUnfolderBase]: For 21763/21763 co-relation queries the response was YES. [2024-06-04 14:53:07,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13686 conditions, 3099 events. 2075/3099 cut-off events. For 21763/21763 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14308 event pairs, 731 based on Foata normal form. 3/3102 useless extension candidates. Maximal degree in co-relation 13650. Up to 3074 conditions per place. [2024-06-04 14:53:07,243 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 84 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2024-06-04 14:53:07,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 98 transitions, 911 flow [2024-06-04 14:53:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-04 14:53:07,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 14:53:07,245 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 667 flow. Second operand 6 states and 98 transitions. [2024-06-04 14:53:07,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 98 transitions, 911 flow [2024-06-04 14:53:07,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 857 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:07,258 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 675 flow [2024-06-04 14:53:07,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=675, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-04 14:53:07,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-04 14:53:07,258 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 675 flow [2024-06-04 14:53:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:07,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:07,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:53:07,259 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:07,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1151943786, now seen corresponding path program 1 times [2024-06-04 14:53:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62878629] [2024-06-04 14:53:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:08,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:08,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62878629] [2024-06-04 14:53:08,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62878629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:08,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:08,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:08,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959661629] [2024-06-04 14:53:08,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:08,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:08,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:08,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:08,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:53:08,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 675 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:53:08,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:08,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:53:08,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:08,951 INFO L124 PetriNetUnfolderBase]: 2064/3205 cut-off events. [2024-06-04 14:53:08,951 INFO L125 PetriNetUnfolderBase]: For 27900/27900 co-relation queries the response was YES. [2024-06-04 14:53:08,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14755 conditions, 3205 events. 2064/3205 cut-off events. For 27900/27900 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16589 event pairs, 349 based on Foata normal form. 16/3204 useless extension candidates. Maximal degree in co-relation 14718. Up to 2268 conditions per place. [2024-06-04 14:53:08,970 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 30 changer transitions 0/133 dead transitions. [2024-06-04 14:53:08,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 133 transitions, 1139 flow [2024-06-04 14:53:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-04 14:53:08,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-04 14:53:08,972 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 675 flow. Second operand 8 states and 169 transitions. [2024-06-04 14:53:08,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 133 transitions, 1139 flow [2024-06-04 14:53:08,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 133 transitions, 1099 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:08,987 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 735 flow [2024-06-04 14:53:08,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=735, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-04 14:53:08,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-04 14:53:08,988 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 735 flow [2024-06-04 14:53:08,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:53:08,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:08,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:08,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:53:08,989 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:08,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash 818315658, now seen corresponding path program 2 times [2024-06-04 14:53:08,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:08,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86659127] [2024-06-04 14:53:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:09,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:09,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86659127] [2024-06-04 14:53:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86659127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:09,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:09,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789785931] [2024-06-04 14:53:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:10,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:53:10,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 735 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:53:10,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:10,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:53:10,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:10,621 INFO L124 PetriNetUnfolderBase]: 2118/3301 cut-off events. [2024-06-04 14:53:10,622 INFO L125 PetriNetUnfolderBase]: For 32649/32649 co-relation queries the response was YES. [2024-06-04 14:53:10,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15510 conditions, 3301 events. 2118/3301 cut-off events. For 32649/32649 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17267 event pairs, 543 based on Foata normal form. 28/3318 useless extension candidates. Maximal degree in co-relation 15472. Up to 2744 conditions per place. [2024-06-04 14:53:10,644 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 95 selfloop transitions, 32 changer transitions 0/134 dead transitions. [2024-06-04 14:53:10,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 1141 flow [2024-06-04 14:53:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 14:53:10,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-04 14:53:10,657 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 735 flow. Second operand 9 states and 184 transitions. [2024-06-04 14:53:10,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 1141 flow [2024-06-04 14:53:10,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1105 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:10,676 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 800 flow [2024-06-04 14:53:10,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=800, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-06-04 14:53:10,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-04 14:53:10,677 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 800 flow [2024-06-04 14:53:10,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:53:10,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:10,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:10,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:53:10,678 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:10,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2037501715, now seen corresponding path program 1 times [2024-06-04 14:53:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:10,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124087501] [2024-06-04 14:53:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:10,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:11,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:11,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124087501] [2024-06-04 14:53:11,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124087501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:11,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:11,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:11,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146352959] [2024-06-04 14:53:11,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:11,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:11,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:11,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:11,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:11,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:11,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 800 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:11,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:11,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:11,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:11,875 INFO L124 PetriNetUnfolderBase]: 2342/3540 cut-off events. [2024-06-04 14:53:11,875 INFO L125 PetriNetUnfolderBase]: For 34436/34436 co-relation queries the response was YES. [2024-06-04 14:53:11,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17109 conditions, 3540 events. 2342/3540 cut-off events. For 34436/34436 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17256 event pairs, 791 based on Foata normal form. 1/3541 useless extension candidates. Maximal degree in co-relation 17069. Up to 3502 conditions per place. [2024-06-04 14:53:11,895 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 94 selfloop transitions, 16 changer transitions 0/113 dead transitions. [2024-06-04 14:53:11,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 113 transitions, 1144 flow [2024-06-04 14:53:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 14:53:11,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:53:11,896 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 800 flow. Second operand 6 states and 105 transitions. [2024-06-04 14:53:11,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 113 transitions, 1144 flow [2024-06-04 14:53:11,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 1057 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 14:53:11,923 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 813 flow [2024-06-04 14:53:11,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=813, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-06-04 14:53:11,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-04 14:53:11,924 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 813 flow [2024-06-04 14:53:11,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:11,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:11,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:11,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:53:11,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:11,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash 163006840, now seen corresponding path program 1 times [2024-06-04 14:53:11,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:11,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509773200] [2024-06-04 14:53:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:11,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:12,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:12,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509773200] [2024-06-04 14:53:12,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509773200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:12,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:12,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:12,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329908024] [2024-06-04 14:53:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:12,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:12,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 813 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) [2024-06-04 14:53:12,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:12,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:12,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:13,552 INFO L124 PetriNetUnfolderBase]: 2239/3447 cut-off events. [2024-06-04 14:53:13,553 INFO L125 PetriNetUnfolderBase]: For 38796/38796 co-relation queries the response was YES. [2024-06-04 14:53:13,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16985 conditions, 3447 events. 2239/3447 cut-off events. For 38796/38796 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17290 event pairs, 742 based on Foata normal form. 4/3451 useless extension candidates. Maximal degree in co-relation 16944. Up to 3244 conditions per place. [2024-06-04 14:53:13,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 100 selfloop transitions, 21 changer transitions 0/128 dead transitions. [2024-06-04 14:53:13,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 128 transitions, 1180 flow [2024-06-04 14:53:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:53:13,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:53:13,585 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 813 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:53:13,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 128 transitions, 1180 flow [2024-06-04 14:53:13,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1150 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:13,609 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 903 flow [2024-06-04 14:53:13,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-04 14:53:13,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-04 14:53:13,609 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 903 flow [2024-06-04 14:53:13,609 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) [2024-06-04 14:53:13,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:13,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:13,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:53:13,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:13,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash 390907990, now seen corresponding path program 2 times [2024-06-04 14:53:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:13,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922976521] [2024-06-04 14:53:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:14,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:14,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922976521] [2024-06-04 14:53:14,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922976521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:14,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:14,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:14,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753888276] [2024-06-04 14:53:14,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:14,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:14,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:14,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:14,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 903 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) [2024-06-04 14:53:14,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:14,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:14,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:15,272 INFO L124 PetriNetUnfolderBase]: 2231/3435 cut-off events. [2024-06-04 14:53:15,272 INFO L125 PetriNetUnfolderBase]: For 43661/43661 co-relation queries the response was YES. [2024-06-04 14:53:15,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17559 conditions, 3435 events. 2231/3435 cut-off events. For 43661/43661 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17164 event pairs, 740 based on Foata normal form. 4/3439 useless extension candidates. Maximal degree in co-relation 17515. Up to 3259 conditions per place. [2024-06-04 14:53:15,294 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-06-04 14:53:15,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 129 transitions, 1245 flow [2024-06-04 14:53:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:53:15,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:53:15,296 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 903 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:53:15,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 129 transitions, 1245 flow [2024-06-04 14:53:15,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 129 transitions, 1176 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:15,331 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 911 flow [2024-06-04 14:53:15,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=911, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-06-04 14:53:15,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-04 14:53:15,332 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 911 flow [2024-06-04 14:53:15,332 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) [2024-06-04 14:53:15,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:15,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:15,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:53:15,332 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:15,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash 399181952, now seen corresponding path program 1 times [2024-06-04 14:53:15,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:15,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873366729] [2024-06-04 14:53:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:16,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:16,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873366729] [2024-06-04 14:53:16,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873366729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:16,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:16,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:16,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327310422] [2024-06-04 14:53:16,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:16,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:16,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 911 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:16,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:16,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:16,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:16,836 INFO L124 PetriNetUnfolderBase]: 2223/3425 cut-off events. [2024-06-04 14:53:16,836 INFO L125 PetriNetUnfolderBase]: For 47767/47769 co-relation queries the response was YES. [2024-06-04 14:53:16,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17774 conditions, 3425 events. 2223/3425 cut-off events. For 47767/47769 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17224 event pairs, 642 based on Foata normal form. 2/3427 useless extension candidates. Maximal degree in co-relation 17729. Up to 3065 conditions per place. [2024-06-04 14:53:16,853 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2024-06-04 14:53:16,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 129 transitions, 1229 flow [2024-06-04 14:53:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-04 14:53:16,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-04 14:53:16,855 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 911 flow. Second operand 6 states and 124 transitions. [2024-06-04 14:53:16,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 129 transitions, 1229 flow [2024-06-04 14:53:16,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 129 transitions, 1170 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:16,889 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 939 flow [2024-06-04 14:53:16,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=939, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2024-06-04 14:53:16,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-04 14:53:16,889 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 939 flow [2024-06-04 14:53:16,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:16,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:16,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:16,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:53:16,890 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:16,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1962323300, now seen corresponding path program 3 times [2024-06-04 14:53:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:16,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655170121] [2024-06-04 14:53:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:16,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:17,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:17,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655170121] [2024-06-04 14:53:17,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655170121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:17,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:17,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:17,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637321312] [2024-06-04 14:53:17,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:17,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:17,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:17,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:17,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 104 transitions, 939 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) [2024-06-04 14:53:17,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:17,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:17,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:18,573 INFO L124 PetriNetUnfolderBase]: 2240/3450 cut-off events. [2024-06-04 14:53:18,573 INFO L125 PetriNetUnfolderBase]: For 52640/52640 co-relation queries the response was YES. [2024-06-04 14:53:18,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18284 conditions, 3450 events. 2240/3450 cut-off events. For 52640/52640 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17201 event pairs, 757 based on Foata normal form. 4/3454 useless extension candidates. Maximal degree in co-relation 18238. Up to 3238 conditions per place. [2024-06-04 14:53:18,595 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 101 selfloop transitions, 23 changer transitions 0/131 dead transitions. [2024-06-04 14:53:18,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 131 transitions, 1283 flow [2024-06-04 14:53:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:53:18,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 14:53:18,598 INFO L175 Difference]: Start difference. First operand has 100 places, 104 transitions, 939 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:53:18,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 131 transitions, 1283 flow [2024-06-04 14:53:18,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 131 transitions, 1213 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:18,635 INFO L231 Difference]: Finished difference. Result has 103 places, 106 transitions, 961 flow [2024-06-04 14:53:18,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=961, PETRI_PLACES=103, PETRI_TRANSITIONS=106} [2024-06-04 14:53:18,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-04 14:53:18,635 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 106 transitions, 961 flow [2024-06-04 14:53:18,635 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) [2024-06-04 14:53:18,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:18,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:18,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:53:18,636 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:18,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash 399478870, now seen corresponding path program 4 times [2024-06-04 14:53:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:18,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129718742] [2024-06-04 14:53:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:19,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:19,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129718742] [2024-06-04 14:53:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129718742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:19,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:19,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424876349] [2024-06-04 14:53:19,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:19,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:19,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:19,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:19,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:19,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 106 transitions, 961 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) [2024-06-04 14:53:19,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:19,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:19,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:20,279 INFO L124 PetriNetUnfolderBase]: 2232/3438 cut-off events. [2024-06-04 14:53:20,279 INFO L125 PetriNetUnfolderBase]: For 57216/57216 co-relation queries the response was YES. [2024-06-04 14:53:20,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18477 conditions, 3438 events. 2232/3438 cut-off events. For 57216/57216 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17166 event pairs, 702 based on Foata normal form. 4/3442 useless extension candidates. Maximal degree in co-relation 18430. Up to 3248 conditions per place. [2024-06-04 14:53:20,299 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 109 selfloop transitions, 17 changer transitions 0/133 dead transitions. [2024-06-04 14:53:20,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1311 flow [2024-06-04 14:53:20,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 14:53:20,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 14:53:20,301 INFO L175 Difference]: Start difference. First operand has 103 places, 106 transitions, 961 flow. Second operand 8 states and 141 transitions. [2024-06-04 14:53:20,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1311 flow [2024-06-04 14:53:20,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 133 transitions, 1247 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:20,337 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 978 flow [2024-06-04 14:53:20,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-04 14:53:20,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 14:53:20,338 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 978 flow [2024-06-04 14:53:20,338 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) [2024-06-04 14:53:20,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:20,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:20,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:53:20,339 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:20,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1499666905, now seen corresponding path program 2 times [2024-06-04 14:53:20,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:20,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130592547] [2024-06-04 14:53:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:20,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:20,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:20,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130592547] [2024-06-04 14:53:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130592547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:20,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:20,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603379895] [2024-06-04 14:53:20,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:21,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:21,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 978 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:21,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:21,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:21,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:21,569 INFO L124 PetriNetUnfolderBase]: 2349/3554 cut-off events. [2024-06-04 14:53:21,570 INFO L125 PetriNetUnfolderBase]: For 61138/61138 co-relation queries the response was YES. [2024-06-04 14:53:21,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19203 conditions, 3554 events. 2349/3554 cut-off events. For 61138/61138 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17311 event pairs, 799 based on Foata normal form. 1/3555 useless extension candidates. Maximal degree in co-relation 19155. Up to 3535 conditions per place. [2024-06-04 14:53:21,592 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 103 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2024-06-04 14:53:21,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 117 transitions, 1228 flow [2024-06-04 14:53:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 14:53:21,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:53:21,594 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 978 flow. Second operand 6 states and 96 transitions. [2024-06-04 14:53:21,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 117 transitions, 1228 flow [2024-06-04 14:53:21,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 1149 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:21,632 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 927 flow [2024-06-04 14:53:21,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=927, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-04 14:53:21,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 14:53:21,632 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 927 flow [2024-06-04 14:53:21,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:21,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:21,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:21,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:53:21,633 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)] === [2024-06-04 14:53:21,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2031781843, now seen corresponding path program 1 times [2024-06-04 14:53:21,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:21,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916134360] [2024-06-04 14:53:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:22,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:22,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916134360] [2024-06-04 14:53:22,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916134360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:22,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235108552] [2024-06-04 14:53:22,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:22,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:22,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 927 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:22,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:22,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:22,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:22,774 INFO L124 PetriNetUnfolderBase]: 2354/3561 cut-off events. [2024-06-04 14:53:22,774 INFO L125 PetriNetUnfolderBase]: For 65235/65235 co-relation queries the response was YES. [2024-06-04 14:53:22,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19314 conditions, 3561 events. 2354/3561 cut-off events. For 65235/65235 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17307 event pairs, 799 based on Foata normal form. 1/3562 useless extension candidates. Maximal degree in co-relation 19265. Up to 3529 conditions per place. [2024-06-04 14:53:22,797 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 16 changer transitions 0/127 dead transitions. [2024-06-04 14:53:22,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 127 transitions, 1301 flow [2024-06-04 14:53:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-04 14:53:22,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:53:22,799 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 927 flow. Second operand 6 states and 102 transitions. [2024-06-04 14:53:22,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 127 transitions, 1301 flow [2024-06-04 14:53:22,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 127 transitions, 1269 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:22,842 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 991 flow [2024-06-04 14:53:22,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=991, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2024-06-04 14:53:22,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-04 14:53:22,843 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 991 flow [2024-06-04 14:53:22,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:22,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:22,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:22,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:53:22,843 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:22,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1237929461, now seen corresponding path program 2 times [2024-06-04 14:53:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497850114] [2024-06-04 14:53:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:23,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497850114] [2024-06-04 14:53:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497850114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:23,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:23,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485224008] [2024-06-04 14:53:23,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:23,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:23,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:23,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 991 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:23,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:23,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:23,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:24,147 INFO L124 PetriNetUnfolderBase]: 2351/3558 cut-off events. [2024-06-04 14:53:24,148 INFO L125 PetriNetUnfolderBase]: For 71044/71046 co-relation queries the response was YES. [2024-06-04 14:53:24,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19865 conditions, 3558 events. 2351/3558 cut-off events. For 71044/71046 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17311 event pairs, 802 based on Foata normal form. 3/3561 useless extension candidates. Maximal degree in co-relation 19815. Up to 3526 conditions per place. [2024-06-04 14:53:24,170 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2024-06-04 14:53:24,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 123 transitions, 1253 flow [2024-06-04 14:53:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-04 14:53:24,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 14:53:24,172 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 991 flow. Second operand 6 states and 98 transitions. [2024-06-04 14:53:24,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 123 transitions, 1253 flow [2024-06-04 14:53:24,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 123 transitions, 1209 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:24,224 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 985 flow [2024-06-04 14:53:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=985, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-06-04 14:53:24,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-04 14:53:24,224 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 985 flow [2024-06-04 14:53:24,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:24,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:24,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:53:24,225 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:24,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1261659193, now seen corresponding path program 1 times [2024-06-04 14:53:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43391764] [2024-06-04 14:53:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43391764] [2024-06-04 14:53:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43391764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:24,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:24,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:24,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121075741] [2024-06-04 14:53:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:24,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:24,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:24,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:24,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 985 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:25,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:25,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:25,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:25,507 INFO L124 PetriNetUnfolderBase]: 2369/3583 cut-off events. [2024-06-04 14:53:25,508 INFO L125 PetriNetUnfolderBase]: For 76408/76410 co-relation queries the response was YES. [2024-06-04 14:53:25,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20081 conditions, 3583 events. 2369/3583 cut-off events. For 76408/76410 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17423 event pairs, 747 based on Foata normal form. 4/3587 useless extension candidates. Maximal degree in co-relation 20029. Up to 3434 conditions per place. [2024-06-04 14:53:25,532 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-04 14:53:25,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 155 transitions, 1605 flow [2024-06-04 14:53:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-04 14:53:25,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-04 14:53:25,533 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 985 flow. Second operand 7 states and 130 transitions. [2024-06-04 14:53:25,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 155 transitions, 1605 flow [2024-06-04 14:53:25,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 155 transitions, 1559 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:25,587 INFO L231 Difference]: Finished difference. Result has 113 places, 130 transitions, 1227 flow [2024-06-04 14:53:25,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1227, PETRI_PLACES=113, PETRI_TRANSITIONS=130} [2024-06-04 14:53:25,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-04 14:53:25,588 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 130 transitions, 1227 flow [2024-06-04 14:53:25,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:25,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:25,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:25,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:53:25,589 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:25,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1030540418, now seen corresponding path program 1 times [2024-06-04 14:53:25,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:25,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132388636] [2024-06-04 14:53:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:25,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:26,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:26,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132388636] [2024-06-04 14:53:26,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132388636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:26,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:26,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300558085] [2024-06-04 14:53:26,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:26,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:26,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:26,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 130 transitions, 1227 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:26,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:26,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:26,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:27,349 INFO L124 PetriNetUnfolderBase]: 2337/3582 cut-off events. [2024-06-04 14:53:27,350 INFO L125 PetriNetUnfolderBase]: For 86755/86757 co-relation queries the response was YES. [2024-06-04 14:53:27,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21269 conditions, 3582 events. 2337/3582 cut-off events. For 86755/86757 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17846 event pairs, 672 based on Foata normal form. 6/3578 useless extension candidates. Maximal degree in co-relation 21215. Up to 3128 conditions per place. [2024-06-04 14:53:27,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 120 selfloop transitions, 39 changer transitions 0/171 dead transitions. [2024-06-04 14:53:27,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 171 transitions, 1750 flow [2024-06-04 14:53:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 14:53:27,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:53:27,378 INFO L175 Difference]: Start difference. First operand has 113 places, 130 transitions, 1227 flow. Second operand 8 states and 152 transitions. [2024-06-04 14:53:27,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 171 transitions, 1750 flow [2024-06-04 14:53:27,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 171 transitions, 1684 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:27,442 INFO L231 Difference]: Finished difference. Result has 121 places, 141 transitions, 1412 flow [2024-06-04 14:53:27,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=121, PETRI_TRANSITIONS=141} [2024-06-04 14:53:27,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-04 14:53:27,443 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 141 transitions, 1412 flow [2024-06-04 14:53:27,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:27,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:27,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:27,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:53:27,444 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:27,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1261958095, now seen corresponding path program 1 times [2024-06-04 14:53:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:27,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830428598] [2024-06-04 14:53:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:28,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:28,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830428598] [2024-06-04 14:53:28,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830428598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:28,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:28,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:28,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125869992] [2024-06-04 14:53:28,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:28,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:28,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:28,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:28,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:28,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 141 transitions, 1412 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:28,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:28,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:28,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:28,612 INFO L124 PetriNetUnfolderBase]: 2456/3711 cut-off events. [2024-06-04 14:53:28,613 INFO L125 PetriNetUnfolderBase]: For 93615/93615 co-relation queries the response was YES. [2024-06-04 14:53:28,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22693 conditions, 3711 events. 2456/3711 cut-off events. For 93615/93615 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18093 event pairs, 757 based on Foata normal form. 3/3714 useless extension candidates. Maximal degree in co-relation 22635. Up to 3646 conditions per place. [2024-06-04 14:53:28,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-04 14:53:28,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 171 transitions, 1946 flow [2024-06-04 14:53:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 14:53:28,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-04 14:53:28,645 INFO L175 Difference]: Start difference. First operand has 121 places, 141 transitions, 1412 flow. Second operand 7 states and 123 transitions. [2024-06-04 14:53:28,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 171 transitions, 1946 flow [2024-06-04 14:53:28,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1890 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:28,723 INFO L231 Difference]: Finished difference. Result has 127 places, 150 transitions, 1526 flow [2024-06-04 14:53:28,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1526, PETRI_PLACES=127, PETRI_TRANSITIONS=150} [2024-06-04 14:53:28,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-04 14:53:28,724 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 150 transitions, 1526 flow [2024-06-04 14:53:28,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:28,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:28,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:28,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:53:28,725 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:28,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:28,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1261957723, now seen corresponding path program 2 times [2024-06-04 14:53:28,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:28,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640678390] [2024-06-04 14:53:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:28,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640678390] [2024-06-04 14:53:29,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640678390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:29,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:29,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:29,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613231091] [2024-06-04 14:53:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:29,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:29,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:29,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 150 transitions, 1526 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:29,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:29,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:29,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:29,931 INFO L124 PetriNetUnfolderBase]: 2484/3751 cut-off events. [2024-06-04 14:53:29,931 INFO L125 PetriNetUnfolderBase]: For 100885/100887 co-relation queries the response was YES. [2024-06-04 14:53:29,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23557 conditions, 3751 events. 2484/3751 cut-off events. For 100885/100887 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 18325 event pairs, 761 based on Foata normal form. 4/3755 useless extension candidates. Maximal degree in co-relation 23496. Up to 3591 conditions per place. [2024-06-04 14:53:29,961 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 42 changer transitions 0/176 dead transitions. [2024-06-04 14:53:29,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 176 transitions, 2110 flow [2024-06-04 14:53:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 14:53:29,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-04 14:53:29,963 INFO L175 Difference]: Start difference. First operand has 127 places, 150 transitions, 1526 flow. Second operand 7 states and 124 transitions. [2024-06-04 14:53:29,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 176 transitions, 2110 flow [2024-06-04 14:53:30,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 176 transitions, 2066 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:30,059 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1682 flow [2024-06-04 14:53:30,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1682, PETRI_PLACES=133, PETRI_TRANSITIONS=158} [2024-06-04 14:53:30,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-04 14:53:30,060 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1682 flow [2024-06-04 14:53:30,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:30,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:30,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:30,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:53:30,060 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:30,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:30,061 INFO L85 PathProgramCache]: Analyzing trace with hash 702481694, now seen corresponding path program 2 times [2024-06-04 14:53:30,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:30,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658816107] [2024-06-04 14:53:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:30,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658816107] [2024-06-04 14:53:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658816107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:31,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:31,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489524575] [2024-06-04 14:53:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:31,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:31,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:31,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 158 transitions, 1682 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:31,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:31,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:31,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:31,786 INFO L124 PetriNetUnfolderBase]: 2429/3717 cut-off events. [2024-06-04 14:53:31,786 INFO L125 PetriNetUnfolderBase]: For 111142/111144 co-relation queries the response was YES. [2024-06-04 14:53:31,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23868 conditions, 3717 events. 2429/3717 cut-off events. For 111142/111144 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18629 event pairs, 670 based on Foata normal form. 8/3715 useless extension candidates. Maximal degree in co-relation 23803. Up to 3101 conditions per place. [2024-06-04 14:53:31,810 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 124 selfloop transitions, 53 changer transitions 0/191 dead transitions. [2024-06-04 14:53:31,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2296 flow [2024-06-04 14:53:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 14:53:31,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-04 14:53:31,812 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1682 flow. Second operand 7 states and 137 transitions. [2024-06-04 14:53:31,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2296 flow [2024-06-04 14:53:31,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 191 transitions, 2223 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:31,909 INFO L231 Difference]: Finished difference. Result has 138 places, 164 transitions, 1858 flow [2024-06-04 14:53:31,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1858, PETRI_PLACES=138, PETRI_TRANSITIONS=164} [2024-06-04 14:53:31,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-04 14:53:31,910 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 164 transitions, 1858 flow [2024-06-04 14:53:31,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:31,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:31,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:53:31,910 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:31,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash 702474254, now seen corresponding path program 3 times [2024-06-04 14:53:31,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:31,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260430767] [2024-06-04 14:53:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:32,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260430767] [2024-06-04 14:53:32,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260430767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:32,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:32,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:32,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706109862] [2024-06-04 14:53:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:32,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:32,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 164 transitions, 1858 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:32,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:32,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:32,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:33,611 INFO L124 PetriNetUnfolderBase]: 2413/3697 cut-off events. [2024-06-04 14:53:33,612 INFO L125 PetriNetUnfolderBase]: For 116779/116781 co-relation queries the response was YES. [2024-06-04 14:53:33,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24371 conditions, 3697 events. 2413/3697 cut-off events. For 116779/116781 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18512 event pairs, 691 based on Foata normal form. 4/3701 useless extension candidates. Maximal degree in co-relation 24304. Up to 3252 conditions per place. [2024-06-04 14:53:33,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 48 changer transitions 0/193 dead transitions. [2024-06-04 14:53:33,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 193 transitions, 2298 flow [2024-06-04 14:53:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-04 14:53:33,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 14:53:33,641 INFO L175 Difference]: Start difference. First operand has 138 places, 164 transitions, 1858 flow. Second operand 7 states and 140 transitions. [2024-06-04 14:53:33,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 193 transitions, 2298 flow [2024-06-04 14:53:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 193 transitions, 2182 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:33,785 INFO L231 Difference]: Finished difference. Result has 142 places, 165 transitions, 1860 flow [2024-06-04 14:53:33,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1860, PETRI_PLACES=142, PETRI_TRANSITIONS=165} [2024-06-04 14:53:33,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-04 14:53:33,786 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 165 transitions, 1860 flow [2024-06-04 14:53:33,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:33,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:33,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:33,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:53:33,786 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:33,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:33,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2041826606, now seen corresponding path program 4 times [2024-06-04 14:53:33,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:33,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168848542] [2024-06-04 14:53:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:33,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:34,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:34,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168848542] [2024-06-04 14:53:34,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168848542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:34,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:34,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131436017] [2024-06-04 14:53:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:34,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:34,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:34,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 165 transitions, 1860 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:34,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:34,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:34,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:35,632 INFO L124 PetriNetUnfolderBase]: 2405/3685 cut-off events. [2024-06-04 14:53:35,632 INFO L125 PetriNetUnfolderBase]: For 114395/114397 co-relation queries the response was YES. [2024-06-04 14:53:35,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24149 conditions, 3685 events. 2405/3685 cut-off events. For 114395/114397 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18388 event pairs, 696 based on Foata normal form. 4/3689 useless extension candidates. Maximal degree in co-relation 24080. Up to 3452 conditions per place. [2024-06-04 14:53:35,666 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 158 selfloop transitions, 17 changer transitions 0/189 dead transitions. [2024-06-04 14:53:35,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 189 transitions, 2298 flow [2024-06-04 14:53:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 14:53:35,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-04 14:53:35,671 INFO L175 Difference]: Start difference. First operand has 142 places, 165 transitions, 1860 flow. Second operand 7 states and 127 transitions. [2024-06-04 14:53:35,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 189 transitions, 2298 flow [2024-06-04 14:53:35,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 189 transitions, 2187 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:35,788 INFO L231 Difference]: Finished difference. Result has 143 places, 167 transitions, 1828 flow [2024-06-04 14:53:35,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1828, PETRI_PLACES=143, PETRI_TRANSITIONS=167} [2024-06-04 14:53:35,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-04 14:53:35,789 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 167 transitions, 1828 flow [2024-06-04 14:53:35,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:35,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:35,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:35,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:53:35,790 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)] === [2024-06-04 14:53:35,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash 754968021, now seen corresponding path program 2 times [2024-06-04 14:53:35,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:35,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193001071] [2024-06-04 14:53:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:35,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:36,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:36,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193001071] [2024-06-04 14:53:36,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193001071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:36,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:36,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:36,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331464728] [2024-06-04 14:53:36,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:36,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:36,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:36,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:36,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:36,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:36,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 167 transitions, 1828 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:36,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:36,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:36,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:37,192 INFO L124 PetriNetUnfolderBase]: 2517/3801 cut-off events. [2024-06-04 14:53:37,193 INFO L125 PetriNetUnfolderBase]: For 120510/120510 co-relation queries the response was YES. [2024-06-04 14:53:37,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24872 conditions, 3801 events. 2517/3801 cut-off events. For 120510/120510 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18598 event pairs, 748 based on Foata normal form. 3/3804 useless extension candidates. Maximal degree in co-relation 24802. Up to 3756 conditions per place. [2024-06-04 14:53:37,224 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 19 changer transitions 0/185 dead transitions. [2024-06-04 14:53:37,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 185 transitions, 2338 flow [2024-06-04 14:53:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 14:53:37,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-04 14:53:37,227 INFO L175 Difference]: Start difference. First operand has 143 places, 167 transitions, 1828 flow. Second operand 7 states and 115 transitions. [2024-06-04 14:53:37,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 185 transitions, 2338 flow [2024-06-04 14:53:37,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 185 transitions, 2277 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:37,362 INFO L231 Difference]: Finished difference. Result has 145 places, 170 transitions, 1861 flow [2024-06-04 14:53:37,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1861, PETRI_PLACES=145, PETRI_TRANSITIONS=170} [2024-06-04 14:53:37,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-04 14:53:37,363 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 170 transitions, 1861 flow [2024-06-04 14:53:37,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:37,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:37,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:37,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:53:37,364 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)] === [2024-06-04 14:53:37,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 754967649, now seen corresponding path program 3 times [2024-06-04 14:53:37,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:37,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754702298] [2024-06-04 14:53:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:37,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:38,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:38,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754702298] [2024-06-04 14:53:38,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754702298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:38,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:38,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:38,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680345612] [2024-06-04 14:53:38,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:38,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:38,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:38,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:38,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:38,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:38,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 170 transitions, 1861 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:38,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:38,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:38,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:38,759 INFO L124 PetriNetUnfolderBase]: 2513/3797 cut-off events. [2024-06-04 14:53:38,759 INFO L125 PetriNetUnfolderBase]: For 125714/125716 co-relation queries the response was YES. [2024-06-04 14:53:38,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24944 conditions, 3797 events. 2513/3797 cut-off events. For 125714/125716 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18574 event pairs, 750 based on Foata normal form. 4/3801 useless extension candidates. Maximal degree in co-relation 24873. Up to 3743 conditions per place. [2024-06-04 14:53:38,795 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2024-06-04 14:53:38,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 181 transitions, 2303 flow [2024-06-04 14:53:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 14:53:38,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-04 14:53:38,797 INFO L175 Difference]: Start difference. First operand has 145 places, 170 transitions, 1861 flow. Second operand 7 states and 114 transitions. [2024-06-04 14:53:38,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 181 transitions, 2303 flow [2024-06-04 14:53:38,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 181 transitions, 2207 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:38,958 INFO L231 Difference]: Finished difference. Result has 147 places, 170 transitions, 1823 flow [2024-06-04 14:53:38,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1823, PETRI_PLACES=147, PETRI_TRANSITIONS=170} [2024-06-04 14:53:38,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-04 14:53:38,958 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 170 transitions, 1823 flow [2024-06-04 14:53:38,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:38,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:38,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:38,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:53:38,959 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:38,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash 755383731, now seen corresponding path program 3 times [2024-06-04 14:53:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:38,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365228307] [2024-06-04 14:53:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:38,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:39,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:39,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365228307] [2024-06-04 14:53:39,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365228307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:39,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:39,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:39,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456094212] [2024-06-04 14:53:39,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:39,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:39,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:39,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:39,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:39,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:39,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 170 transitions, 1823 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:39,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:39,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:39,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:40,333 INFO L124 PetriNetUnfolderBase]: 2504/3784 cut-off events. [2024-06-04 14:53:40,334 INFO L125 PetriNetUnfolderBase]: For 130978/130978 co-relation queries the response was YES. [2024-06-04 14:53:40,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24877 conditions, 3784 events. 2504/3784 cut-off events. For 130978/130978 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18497 event pairs, 744 based on Foata normal form. 3/3787 useless extension candidates. Maximal degree in co-relation 24806. Up to 3756 conditions per place. [2024-06-04 14:53:40,366 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 14 changer transitions 0/182 dead transitions. [2024-06-04 14:53:40,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 182 transitions, 2211 flow [2024-06-04 14:53:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-04 14:53:40,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-04 14:53:40,368 INFO L175 Difference]: Start difference. First operand has 147 places, 170 transitions, 1823 flow. Second operand 7 states and 110 transitions. [2024-06-04 14:53:40,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 182 transitions, 2211 flow [2024-06-04 14:53:40,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 182 transitions, 2098 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:40,483 INFO L231 Difference]: Finished difference. Result has 148 places, 170 transitions, 1744 flow [2024-06-04 14:53:40,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=148, PETRI_TRANSITIONS=170} [2024-06-04 14:53:40,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-04 14:53:40,484 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 170 transitions, 1744 flow [2024-06-04 14:53:40,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:40,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:40,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:40,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:53:40,485 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:40,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1439153971, now seen corresponding path program 1 times [2024-06-04 14:53:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:40,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28484622] [2024-06-04 14:53:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:40,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:41,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:41,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28484622] [2024-06-04 14:53:41,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28484622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:41,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:41,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:41,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380871305] [2024-06-04 14:53:41,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:41,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:41,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:41,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:41,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 170 transitions, 1744 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:41,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:41,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:41,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:42,045 INFO L124 PetriNetUnfolderBase]: 2514/3798 cut-off events. [2024-06-04 14:53:42,046 INFO L125 PetriNetUnfolderBase]: For 137026/137026 co-relation queries the response was YES. [2024-06-04 14:53:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24945 conditions, 3798 events. 2514/3798 cut-off events. For 137026/137026 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18570 event pairs, 743 based on Foata normal form. 2/3800 useless extension candidates. Maximal degree in co-relation 24875. Up to 3750 conditions per place. [2024-06-04 14:53:42,078 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 16 changer transitions 0/190 dead transitions. [2024-06-04 14:53:42,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 190 transitions, 2196 flow [2024-06-04 14:53:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:53:42,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-04 14:53:42,080 INFO L175 Difference]: Start difference. First operand has 148 places, 170 transitions, 1744 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:53:42,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 190 transitions, 2196 flow [2024-06-04 14:53:42,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 190 transitions, 2133 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:42,211 INFO L231 Difference]: Finished difference. Result has 148 places, 173 transitions, 1760 flow [2024-06-04 14:53:42,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1760, PETRI_PLACES=148, PETRI_TRANSITIONS=173} [2024-06-04 14:53:42,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-04 14:53:42,212 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 173 transitions, 1760 flow [2024-06-04 14:53:42,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:42,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:42,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:42,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:53:42,212 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:42,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1439274127, now seen corresponding path program 1 times [2024-06-04 14:53:42,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:42,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384065392] [2024-06-04 14:53:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:42,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:42,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:42,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384065392] [2024-06-04 14:53:42,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384065392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:42,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:42,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:42,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438750759] [2024-06-04 14:53:42,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:42,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:42,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:42,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:42,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:42,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:42,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 173 transitions, 1760 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:42,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:42,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:42,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:43,760 INFO L124 PetriNetUnfolderBase]: 2529/3819 cut-off events. [2024-06-04 14:53:43,760 INFO L125 PetriNetUnfolderBase]: For 144539/144539 co-relation queries the response was YES. [2024-06-04 14:53:43,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25443 conditions, 3819 events. 2529/3819 cut-off events. For 144539/144539 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18690 event pairs, 748 based on Foata normal form. 3/3822 useless extension candidates. Maximal degree in co-relation 25373. Up to 3750 conditions per place. [2024-06-04 14:53:43,794 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 25 changer transitions 0/198 dead transitions. [2024-06-04 14:53:43,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 198 transitions, 2328 flow [2024-06-04 14:53:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 14:53:43,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-04 14:53:43,795 INFO L175 Difference]: Start difference. First operand has 148 places, 173 transitions, 1760 flow. Second operand 7 states and 122 transitions. [2024-06-04 14:53:43,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 198 transitions, 2328 flow [2024-06-04 14:53:43,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 198 transitions, 2275 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:43,906 INFO L231 Difference]: Finished difference. Result has 150 places, 179 transitions, 1833 flow [2024-06-04 14:53:43,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1833, PETRI_PLACES=150, PETRI_TRANSITIONS=179} [2024-06-04 14:53:43,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 14:53:43,907 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 179 transitions, 1833 flow [2024-06-04 14:53:43,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:43,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:43,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:43,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:53:43,908 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:43,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -827813939, now seen corresponding path program 2 times [2024-06-04 14:53:43,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:43,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886810089] [2024-06-04 14:53:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:44,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:44,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886810089] [2024-06-04 14:53:44,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886810089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:44,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:44,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:44,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249908781] [2024-06-04 14:53:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:44,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:44,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:44,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:44,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:44,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 179 transitions, 1833 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:44,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:44,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:44,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:45,462 INFO L124 PetriNetUnfolderBase]: 2539/3833 cut-off events. [2024-06-04 14:53:45,462 INFO L125 PetriNetUnfolderBase]: For 152876/152876 co-relation queries the response was YES. [2024-06-04 14:53:45,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26082 conditions, 3833 events. 2539/3833 cut-off events. For 152876/152876 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18751 event pairs, 749 based on Foata normal form. 2/3835 useless extension candidates. Maximal degree in co-relation 26011. Up to 3761 conditions per place. [2024-06-04 14:53:45,496 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 28 changer transitions 0/202 dead transitions. [2024-06-04 14:53:45,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 202 transitions, 2429 flow [2024-06-04 14:53:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 14:53:45,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:53:45,497 INFO L175 Difference]: Start difference. First operand has 150 places, 179 transitions, 1833 flow. Second operand 7 states and 119 transitions. [2024-06-04 14:53:45,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 202 transitions, 2429 flow [2024-06-04 14:53:45,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 202 transitions, 2383 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:45,629 INFO L231 Difference]: Finished difference. Result has 154 places, 185 transitions, 1939 flow [2024-06-04 14:53:45,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1939, PETRI_PLACES=154, PETRI_TRANSITIONS=185} [2024-06-04 14:53:45,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-04 14:53:45,630 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 185 transitions, 1939 flow [2024-06-04 14:53:45,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:45,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:45,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:45,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:53:45,630 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)] === [2024-06-04 14:53:45,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:45,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1309271643, now seen corresponding path program 2 times [2024-06-04 14:53:45,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:45,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351017235] [2024-06-04 14:53:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:45,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351017235] [2024-06-04 14:53:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351017235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:46,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:46,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331847426] [2024-06-04 14:53:46,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:46,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:46,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 185 transitions, 1939 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:46,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:46,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:46,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:47,136 INFO L124 PetriNetUnfolderBase]: 2554/3855 cut-off events. [2024-06-04 14:53:47,136 INFO L125 PetriNetUnfolderBase]: For 162944/162946 co-relation queries the response was YES. [2024-06-04 14:53:47,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26756 conditions, 3855 events. 2554/3855 cut-off events. For 162944/162946 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18865 event pairs, 748 based on Foata normal form. 5/3860 useless extension candidates. Maximal degree in co-relation 26683. Up to 3778 conditions per place. [2024-06-04 14:53:47,172 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 29 changer transitions 0/203 dead transitions. [2024-06-04 14:53:47,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 203 transitions, 2481 flow [2024-06-04 14:53:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-04 14:53:47,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-04 14:53:47,174 INFO L175 Difference]: Start difference. First operand has 154 places, 185 transitions, 1939 flow. Second operand 7 states and 116 transitions. [2024-06-04 14:53:47,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 203 transitions, 2481 flow [2024-06-04 14:53:47,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 203 transitions, 2428 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:47,337 INFO L231 Difference]: Finished difference. Result has 158 places, 188 transitions, 1985 flow [2024-06-04 14:53:47,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1985, PETRI_PLACES=158, PETRI_TRANSITIONS=188} [2024-06-04 14:53:47,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-04 14:53:47,338 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 188 transitions, 1985 flow [2024-06-04 14:53:47,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:47,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:47,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:47,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:53:47,339 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)] === [2024-06-04 14:53:47,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -296765153, now seen corresponding path program 3 times [2024-06-04 14:53:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:47,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783991603] [2024-06-04 14:53:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:47,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:47,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:47,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783991603] [2024-06-04 14:53:47,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783991603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:47,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:47,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:47,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161185583] [2024-06-04 14:53:47,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:47,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:47,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:48,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:48,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 188 transitions, 1985 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:48,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:48,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:48,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:48,817 INFO L124 PetriNetUnfolderBase]: 2545/3843 cut-off events. [2024-06-04 14:53:48,817 INFO L125 PetriNetUnfolderBase]: For 168938/168940 co-relation queries the response was YES. [2024-06-04 14:53:48,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 3843 events. 2545/3843 cut-off events. For 168938/168940 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18769 event pairs, 746 based on Foata normal form. 5/3848 useless extension candidates. Maximal degree in co-relation 26772. Up to 3771 conditions per place. [2024-06-04 14:53:48,850 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 28 changer transitions 0/204 dead transitions. [2024-06-04 14:53:48,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 204 transitions, 2429 flow [2024-06-04 14:53:48,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 14:53:48,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-04 14:53:48,856 INFO L175 Difference]: Start difference. First operand has 158 places, 188 transitions, 1985 flow. Second operand 7 states and 118 transitions. [2024-06-04 14:53:48,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 204 transitions, 2429 flow [2024-06-04 14:53:48,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 204 transitions, 2346 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:48,958 INFO L231 Difference]: Finished difference. Result has 161 places, 188 transitions, 1964 flow [2024-06-04 14:53:48,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1964, PETRI_PLACES=161, PETRI_TRANSITIONS=188} [2024-06-04 14:53:48,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-04 14:53:48,960 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 188 transitions, 1964 flow [2024-06-04 14:53:48,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:48,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:48,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:53:48,961 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)] === [2024-06-04 14:53:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1616405461, now seen corresponding path program 3 times [2024-06-04 14:53:48,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:48,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231979217] [2024-06-04 14:53:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:49,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:49,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231979217] [2024-06-04 14:53:49,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231979217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:49,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:49,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:49,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402513247] [2024-06-04 14:53:49,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:49,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:49,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:49,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:49,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 188 transitions, 1964 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:49,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:49,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:49,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:50,482 INFO L124 PetriNetUnfolderBase]: 2539/3836 cut-off events. [2024-06-04 14:53:50,483 INFO L125 PetriNetUnfolderBase]: For 174512/174514 co-relation queries the response was YES. [2024-06-04 14:53:50,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26844 conditions, 3836 events. 2539/3836 cut-off events. For 174512/174514 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18818 event pairs, 758 based on Foata normal form. 2/3838 useless extension candidates. Maximal degree in co-relation 26768. Up to 3765 conditions per place. [2024-06-04 14:53:50,520 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 169 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-04 14:53:50,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 200 transitions, 2390 flow [2024-06-04 14:53:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 14:53:50,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-04 14:53:50,522 INFO L175 Difference]: Start difference. First operand has 161 places, 188 transitions, 1964 flow. Second operand 7 states and 115 transitions. [2024-06-04 14:53:50,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 200 transitions, 2390 flow [2024-06-04 14:53:50,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 200 transitions, 2289 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:50,651 INFO L231 Difference]: Finished difference. Result has 161 places, 188 transitions, 1925 flow [2024-06-04 14:53:50,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1925, PETRI_PLACES=161, PETRI_TRANSITIONS=188} [2024-06-04 14:53:50,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-04 14:53:50,652 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 188 transitions, 1925 flow [2024-06-04 14:53:50,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:50,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:50,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:50,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:53:50,652 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)] === [2024-06-04 14:53:50,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:50,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1807986800, now seen corresponding path program 1 times [2024-06-04 14:53:50,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:50,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644410734] [2024-06-04 14:53:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:50,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:51,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644410734] [2024-06-04 14:53:51,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644410734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:51,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:51,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:51,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102204597] [2024-06-04 14:53:51,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:51,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:51,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:51,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:51,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 188 transitions, 1925 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:51,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:51,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:51,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:52,585 INFO L124 PetriNetUnfolderBase]: 2557/3860 cut-off events. [2024-06-04 14:53:52,585 INFO L125 PetriNetUnfolderBase]: For 182694/182696 co-relation queries the response was YES. [2024-06-04 14:53:52,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27120 conditions, 3860 events. 2557/3860 cut-off events. For 182694/182696 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18973 event pairs, 740 based on Foata normal form. 4/3864 useless extension candidates. Maximal degree in co-relation 27043. Up to 3655 conditions per place. [2024-06-04 14:53:52,623 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 58 changer transitions 0/230 dead transitions. [2024-06-04 14:53:52,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 230 transitions, 2733 flow [2024-06-04 14:53:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:53:52,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:53:52,625 INFO L175 Difference]: Start difference. First operand has 161 places, 188 transitions, 1925 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:53:52,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 230 transitions, 2733 flow [2024-06-04 14:53:52,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 230 transitions, 2643 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:52,775 INFO L231 Difference]: Finished difference. Result has 164 places, 198 transitions, 2103 flow [2024-06-04 14:53:52,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2103, PETRI_PLACES=164, PETRI_TRANSITIONS=198} [2024-06-04 14:53:52,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-04 14:53:52,776 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 198 transitions, 2103 flow [2024-06-04 14:53:52,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:52,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:52,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:52,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:53:52,776 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:52,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:52,777 INFO L85 PathProgramCache]: Analyzing trace with hash -548081565, now seen corresponding path program 1 times [2024-06-04 14:53:52,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:52,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227245164] [2024-06-04 14:53:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:53,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227245164] [2024-06-04 14:53:53,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227245164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:53,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:53,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:53,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926585719] [2024-06-04 14:53:53,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:53,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:53,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:53,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:53,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:53,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 198 transitions, 2103 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:53,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:53,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:53,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:54,304 INFO L124 PetriNetUnfolderBase]: 2659/4001 cut-off events. [2024-06-04 14:53:54,305 INFO L125 PetriNetUnfolderBase]: For 203578/203580 co-relation queries the response was YES. [2024-06-04 14:53:54,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29097 conditions, 4001 events. 2659/4001 cut-off events. For 203578/203580 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19757 event pairs, 749 based on Foata normal form. 8/4009 useless extension candidates. Maximal degree in co-relation 29019. Up to 3651 conditions per place. [2024-06-04 14:53:54,338 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 65 changer transitions 0/248 dead transitions. [2024-06-04 14:53:54,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 248 transitions, 3023 flow [2024-06-04 14:53:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 14:53:54,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:53:54,340 INFO L175 Difference]: Start difference. First operand has 164 places, 198 transitions, 2103 flow. Second operand 8 states and 152 transitions. [2024-06-04 14:53:54,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 248 transitions, 3023 flow [2024-06-04 14:53:54,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 248 transitions, 2892 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:54,497 INFO L231 Difference]: Finished difference. Result has 169 places, 217 transitions, 2384 flow [2024-06-04 14:53:54,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1972, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=169, PETRI_TRANSITIONS=217} [2024-06-04 14:53:54,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 14:53:54,498 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 217 transitions, 2384 flow [2024-06-04 14:53:54,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:54,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:54,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:54,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:53:54,503 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:54,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1807863792, now seen corresponding path program 1 times [2024-06-04 14:53:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:54,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945739991] [2024-06-04 14:53:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:54,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:55,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:55,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945739991] [2024-06-04 14:53:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945739991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:55,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:55,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:55,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466247734] [2024-06-04 14:53:55,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:55,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:55,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:55,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:55,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:55,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 217 transitions, 2384 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:55,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:55,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:55,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:56,064 INFO L124 PetriNetUnfolderBase]: 2685/4037 cut-off events. [2024-06-04 14:53:56,064 INFO L125 PetriNetUnfolderBase]: For 214699/214701 co-relation queries the response was YES. [2024-06-04 14:53:56,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30652 conditions, 4037 events. 2685/4037 cut-off events. For 214699/214701 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19932 event pairs, 758 based on Foata normal form. 4/4041 useless extension candidates. Maximal degree in co-relation 30570. Up to 3866 conditions per place. [2024-06-04 14:53:56,098 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 54 changer transitions 0/248 dead transitions. [2024-06-04 14:53:56,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 248 transitions, 3239 flow [2024-06-04 14:53:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 14:53:56,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-04 14:53:56,100 INFO L175 Difference]: Start difference. First operand has 169 places, 217 transitions, 2384 flow. Second operand 7 states and 127 transitions. [2024-06-04 14:53:56,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 248 transitions, 3239 flow [2024-06-04 14:53:56,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 248 transitions, 3166 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:56,288 INFO L231 Difference]: Finished difference. Result has 175 places, 227 transitions, 2602 flow [2024-06-04 14:53:56,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2602, PETRI_PLACES=175, PETRI_TRANSITIONS=227} [2024-06-04 14:53:56,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-04 14:53:56,289 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 227 transitions, 2602 flow [2024-06-04 14:53:56,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:56,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:56,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:56,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:53:56,290 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:56,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:56,290 INFO L85 PathProgramCache]: Analyzing trace with hash -538823508, now seen corresponding path program 2 times [2024-06-04 14:53:56,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:56,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908022457] [2024-06-04 14:53:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:56,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:56,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908022457] [2024-06-04 14:53:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908022457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:56,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300283284] [2024-06-04 14:53:56,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:56,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:56,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:56,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:56,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:56,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 227 transitions, 2602 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:56,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:56,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:56,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:57,542 INFO L124 PetriNetUnfolderBase]: 2679/4029 cut-off events. [2024-06-04 14:53:57,542 INFO L125 PetriNetUnfolderBase]: For 221919/221921 co-relation queries the response was YES. [2024-06-04 14:53:57,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30760 conditions, 4029 events. 2679/4029 cut-off events. For 221919/221921 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19930 event pairs, 754 based on Foata normal form. 4/4033 useless extension candidates. Maximal degree in co-relation 30674. Up to 3861 conditions per place. [2024-06-04 14:53:57,587 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 50 changer transitions 0/245 dead transitions. [2024-06-04 14:53:57,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 3294 flow [2024-06-04 14:53:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 14:53:57,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-04 14:53:57,589 INFO L175 Difference]: Start difference. First operand has 175 places, 227 transitions, 2602 flow. Second operand 7 states and 124 transitions. [2024-06-04 14:53:57,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 3294 flow [2024-06-04 14:53:57,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 245 transitions, 3216 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:57,802 INFO L231 Difference]: Finished difference. Result has 179 places, 227 transitions, 2633 flow [2024-06-04 14:53:57,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2633, PETRI_PLACES=179, PETRI_TRANSITIONS=227} [2024-06-04 14:53:57,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-04 14:53:57,803 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 227 transitions, 2633 flow [2024-06-04 14:53:57,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:57,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:57,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:57,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:53:57,804 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:57,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1881980317, now seen corresponding path program 1 times [2024-06-04 14:53:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:57,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95570491] [2024-06-04 14:53:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:57,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:58,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:58,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95570491] [2024-06-04 14:53:58,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95570491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:58,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:58,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:53:58,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426662883] [2024-06-04 14:53:58,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:58,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:53:58,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:58,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:53:58,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:53:59,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:59,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 227 transitions, 2633 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:59,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:59,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:59,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:59,874 INFO L124 PetriNetUnfolderBase]: 2648/4029 cut-off events. [2024-06-04 14:53:59,875 INFO L125 PetriNetUnfolderBase]: For 240748/240750 co-relation queries the response was YES. [2024-06-04 14:53:59,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31116 conditions, 4029 events. 2648/4029 cut-off events. For 240748/240750 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20381 event pairs, 688 based on Foata normal form. 12/4031 useless extension candidates. Maximal degree in co-relation 31029. Up to 3452 conditions per place. [2024-06-04 14:53:59,920 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 48 changer transitions 0/265 dead transitions. [2024-06-04 14:53:59,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 265 transitions, 3245 flow [2024-06-04 14:53:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:53:59,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-04 14:53:59,926 INFO L175 Difference]: Start difference. First operand has 179 places, 227 transitions, 2633 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:53:59,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 265 transitions, 3245 flow [2024-06-04 14:54:00,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 265 transitions, 3158 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:00,251 INFO L231 Difference]: Finished difference. Result has 184 places, 228 transitions, 2676 flow [2024-06-04 14:54:00,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2676, PETRI_PLACES=184, PETRI_TRANSITIONS=228} [2024-06-04 14:54:00,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 14:54:00,253 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 228 transitions, 2676 flow [2024-06-04 14:54:00,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:00,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:00,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:00,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:54:00,254 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:00,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash -538815975, now seen corresponding path program 2 times [2024-06-04 14:54:00,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:00,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656276686] [2024-06-04 14:54:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:00,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:00,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656276686] [2024-06-04 14:54:00,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656276686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:00,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:00,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:00,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030854748] [2024-06-04 14:54:00,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:00,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:00,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:00,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:00,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:01,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:01,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 228 transitions, 2676 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:01,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:01,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:01,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:01,744 INFO L124 PetriNetUnfolderBase]: 2852/4283 cut-off events. [2024-06-04 14:54:01,744 INFO L125 PetriNetUnfolderBase]: For 257315/257317 co-relation queries the response was YES. [2024-06-04 14:54:01,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33275 conditions, 4283 events. 2852/4283 cut-off events. For 257315/257317 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21465 event pairs, 795 based on Foata normal form. 8/4291 useless extension candidates. Maximal degree in co-relation 33187. Up to 3826 conditions per place. [2024-06-04 14:54:01,787 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 72 changer transitions 0/266 dead transitions. [2024-06-04 14:54:01,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 266 transitions, 3688 flow [2024-06-04 14:54:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 14:54:01,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 14:54:01,789 INFO L175 Difference]: Start difference. First operand has 184 places, 228 transitions, 2676 flow. Second operand 8 states and 147 transitions. [2024-06-04 14:54:01,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 266 transitions, 3688 flow [2024-06-04 14:54:02,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 266 transitions, 3597 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:02,077 INFO L231 Difference]: Finished difference. Result has 187 places, 239 transitions, 2893 flow [2024-06-04 14:54:02,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2893, PETRI_PLACES=187, PETRI_TRANSITIONS=239} [2024-06-04 14:54:02,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-04 14:54:02,078 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 239 transitions, 2893 flow [2024-06-04 14:54:02,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:02,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:02,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:02,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:54:02,079 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:02,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash -538827135, now seen corresponding path program 3 times [2024-06-04 14:54:02,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:02,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912552119] [2024-06-04 14:54:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:02,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:02,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:02,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912552119] [2024-06-04 14:54:02,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912552119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:02,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:02,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192654411] [2024-06-04 14:54:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:02,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:02,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:02,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:02,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 239 transitions, 2893 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:02,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:02,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:03,584 INFO L124 PetriNetUnfolderBase]: 2840/4268 cut-off events. [2024-06-04 14:54:03,585 INFO L125 PetriNetUnfolderBase]: For 263211/263213 co-relation queries the response was YES. [2024-06-04 14:54:03,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33354 conditions, 4268 events. 2840/4268 cut-off events. For 263211/263213 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21376 event pairs, 789 based on Foata normal form. 8/4276 useless extension candidates. Maximal degree in co-relation 33264. Up to 3822 conditions per place. [2024-06-04 14:54:03,629 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 73 changer transitions 0/267 dead transitions. [2024-06-04 14:54:03,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 267 transitions, 3700 flow [2024-06-04 14:54:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 14:54:03,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-04 14:54:03,630 INFO L175 Difference]: Start difference. First operand has 187 places, 239 transitions, 2893 flow. Second operand 8 states and 149 transitions. [2024-06-04 14:54:03,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 267 transitions, 3700 flow [2024-06-04 14:54:03,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 267 transitions, 3564 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:03,904 INFO L231 Difference]: Finished difference. Result has 191 places, 240 transitions, 2937 flow [2024-06-04 14:54:03,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2757, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2937, PETRI_PLACES=191, PETRI_TRANSITIONS=240} [2024-06-04 14:54:03,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-04 14:54:03,904 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 240 transitions, 2937 flow [2024-06-04 14:54:03,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:03,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:03,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:03,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:54:03,905 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:03,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:03,905 INFO L85 PathProgramCache]: Analyzing trace with hash 465985228, now seen corresponding path program 2 times [2024-06-04 14:54:03,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:03,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971466915] [2024-06-04 14:54:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:03,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:04,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:04,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971466915] [2024-06-04 14:54:04,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971466915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:04,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:04,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:04,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117111082] [2024-06-04 14:54:04,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:04,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:04,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:04,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:04,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:04,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 240 transitions, 2937 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:04,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:04,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:04,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:05,526 INFO L124 PetriNetUnfolderBase]: 2852/4285 cut-off events. [2024-06-04 14:54:05,527 INFO L125 PetriNetUnfolderBase]: For 270528/270530 co-relation queries the response was YES. [2024-06-04 14:54:05,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33572 conditions, 4285 events. 2852/4285 cut-off events. For 270528/270530 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21487 event pairs, 784 based on Foata normal form. 4/4289 useless extension candidates. Maximal degree in co-relation 33481. Up to 4110 conditions per place. [2024-06-04 14:54:05,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 205 selfloop transitions, 55 changer transitions 0/263 dead transitions. [2024-06-04 14:54:05,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 263 transitions, 3725 flow [2024-06-04 14:54:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 14:54:05,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-04 14:54:05,573 INFO L175 Difference]: Start difference. First operand has 191 places, 240 transitions, 2937 flow. Second operand 8 states and 137 transitions. [2024-06-04 14:54:05,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 263 transitions, 3725 flow [2024-06-04 14:54:06,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 263 transitions, 3581 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:06,017 INFO L231 Difference]: Finished difference. Result has 194 places, 244 transitions, 2960 flow [2024-06-04 14:54:06,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2960, PETRI_PLACES=194, PETRI_TRANSITIONS=244} [2024-06-04 14:54:06,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-04 14:54:06,018 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 244 transitions, 2960 flow [2024-06-04 14:54:06,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:06,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:06,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:06,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:54:06,019 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:06,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1224108658, now seen corresponding path program 3 times [2024-06-04 14:54:06,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:06,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132941287] [2024-06-04 14:54:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:06,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:06,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:06,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132941287] [2024-06-04 14:54:06,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132941287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:06,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:06,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:06,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008932420] [2024-06-04 14:54:06,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:06,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:06,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:06,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:06,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 244 transitions, 2960 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:06,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:06,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:06,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:07,672 INFO L124 PetriNetUnfolderBase]: 2839/4265 cut-off events. [2024-06-04 14:54:07,673 INFO L125 PetriNetUnfolderBase]: For 277880/277880 co-relation queries the response was YES. [2024-06-04 14:54:07,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33414 conditions, 4265 events. 2839/4265 cut-off events. For 277880/277880 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21365 event pairs, 782 based on Foata normal form. 1/4266 useless extension candidates. Maximal degree in co-relation 33322. Up to 4216 conditions per place. [2024-06-04 14:54:07,712 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 234 selfloop transitions, 24 changer transitions 0/261 dead transitions. [2024-06-04 14:54:07,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 261 transitions, 3610 flow [2024-06-04 14:54:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 14:54:07,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-04 14:54:07,714 INFO L175 Difference]: Start difference. First operand has 194 places, 244 transitions, 2960 flow. Second operand 7 states and 118 transitions. [2024-06-04 14:54:07,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 261 transitions, 3610 flow [2024-06-04 14:54:08,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 261 transitions, 3463 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:08,062 INFO L231 Difference]: Finished difference. Result has 195 places, 244 transitions, 2867 flow [2024-06-04 14:54:08,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2867, PETRI_PLACES=195, PETRI_TRANSITIONS=244} [2024-06-04 14:54:08,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-04 14:54:08,063 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 244 transitions, 2867 flow [2024-06-04 14:54:08,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:08,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:08,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:08,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:54:08,063 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:08,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:08,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1667812940, now seen corresponding path program 4 times [2024-06-04 14:54:08,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:08,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594687171] [2024-06-04 14:54:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:08,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:08,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594687171] [2024-06-04 14:54:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594687171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:08,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:08,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:08,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846352777] [2024-06-04 14:54:08,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:08,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:08,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 244 transitions, 2867 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:08,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:08,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:08,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:09,528 INFO L124 PetriNetUnfolderBase]: 2844/4272 cut-off events. [2024-06-04 14:54:09,528 INFO L125 PetriNetUnfolderBase]: For 288154/288154 co-relation queries the response was YES. [2024-06-04 14:54:09,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33516 conditions, 4272 events. 2844/4272 cut-off events. For 288154/288154 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21389 event pairs, 782 based on Foata normal form. 1/4273 useless extension candidates. Maximal degree in co-relation 33423. Up to 4238 conditions per place. [2024-06-04 14:54:09,570 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 238 selfloop transitions, 19 changer transitions 0/260 dead transitions. [2024-06-04 14:54:09,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 260 transitions, 3473 flow [2024-06-04 14:54:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 14:54:09,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-04 14:54:09,571 INFO L175 Difference]: Start difference. First operand has 195 places, 244 transitions, 2867 flow. Second operand 7 states and 113 transitions. [2024-06-04 14:54:09,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 260 transitions, 3473 flow [2024-06-04 14:54:09,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 260 transitions, 3281 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 14:54:09,937 INFO L231 Difference]: Finished difference. Result has 193 places, 247 transitions, 2785 flow [2024-06-04 14:54:09,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2785, PETRI_PLACES=193, PETRI_TRANSITIONS=247} [2024-06-04 14:54:09,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-04 14:54:09,938 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 247 transitions, 2785 flow [2024-06-04 14:54:09,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:09,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:09,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:09,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:54:09,939 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:09,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:09,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1362054103, now seen corresponding path program 2 times [2024-06-04 14:54:09,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:09,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944699485] [2024-06-04 14:54:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:09,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944699485] [2024-06-04 14:54:11,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944699485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:11,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:11,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:11,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544290444] [2024-06-04 14:54:11,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:11,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:11,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:11,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 247 transitions, 2785 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-04 14:54:11,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:11,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:11,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:12,018 INFO L124 PetriNetUnfolderBase]: 2790/4238 cut-off events. [2024-06-04 14:54:12,019 INFO L125 PetriNetUnfolderBase]: For 310861/310863 co-relation queries the response was YES. [2024-06-04 14:54:12,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33144 conditions, 4238 events. 2790/4238 cut-off events. For 310861/310863 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21694 event pairs, 658 based on Foata normal form. 24/4252 useless extension candidates. Maximal degree in co-relation 33051. Up to 3401 conditions per place. [2024-06-04 14:54:12,069 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 199 selfloop transitions, 57 changer transitions 0/280 dead transitions. [2024-06-04 14:54:12,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 280 transitions, 3409 flow [2024-06-04 14:54:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 14:54:12,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:54:12,071 INFO L175 Difference]: Start difference. First operand has 193 places, 247 transitions, 2785 flow. Second operand 8 states and 152 transitions. [2024-06-04 14:54:12,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 280 transitions, 3409 flow [2024-06-04 14:54:12,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 280 transitions, 3355 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:12,389 INFO L231 Difference]: Finished difference. Result has 196 places, 248 transitions, 2882 flow [2024-06-04 14:54:12,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2882, PETRI_PLACES=196, PETRI_TRANSITIONS=248} [2024-06-04 14:54:12,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-04 14:54:12,390 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 248 transitions, 2882 flow [2024-06-04 14:54:12,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-04 14:54:12,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:12,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:12,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:54:12,391 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:12,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash 301866963, now seen corresponding path program 3 times [2024-06-04 14:54:12,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:12,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940882261] [2024-06-04 14:54:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:12,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:13,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:13,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940882261] [2024-06-04 14:54:13,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940882261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:13,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:13,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:13,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160495237] [2024-06-04 14:54:13,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:13,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:13,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:13,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:13,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:13,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:13,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 248 transitions, 2882 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-04 14:54:13,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:13,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:13,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:14,562 INFO L124 PetriNetUnfolderBase]: 2866/4374 cut-off events. [2024-06-04 14:54:14,563 INFO L125 PetriNetUnfolderBase]: For 313333/313335 co-relation queries the response was YES. [2024-06-04 14:54:14,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34175 conditions, 4374 events. 2866/4374 cut-off events. For 313333/313335 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22762 event pairs, 724 based on Foata normal form. 12/4386 useless extension candidates. Maximal degree in co-relation 34081. Up to 3761 conditions per place. [2024-06-04 14:54:14,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 50 changer transitions 0/285 dead transitions. [2024-06-04 14:54:14,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 285 transitions, 3542 flow [2024-06-04 14:54:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 14:54:14,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-04 14:54:14,609 INFO L175 Difference]: Start difference. First operand has 196 places, 248 transitions, 2882 flow. Second operand 8 states and 157 transitions. [2024-06-04 14:54:14,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 285 transitions, 3542 flow [2024-06-04 14:54:14,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 285 transitions, 3395 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:14,928 INFO L231 Difference]: Finished difference. Result has 198 places, 250 transitions, 2889 flow [2024-06-04 14:54:14,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2889, PETRI_PLACES=198, PETRI_TRANSITIONS=250} [2024-06-04 14:54:14,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-04 14:54:14,929 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 250 transitions, 2889 flow [2024-06-04 14:54:14,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-04 14:54:14,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:14,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:14,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:54:14,930 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:14,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:14,930 INFO L85 PathProgramCache]: Analyzing trace with hash 301860453, now seen corresponding path program 4 times [2024-06-04 14:54:14,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:14,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630772016] [2024-06-04 14:54:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:14,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:16,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:16,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630772016] [2024-06-04 14:54:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630772016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:16,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:16,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:54:16,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235618366] [2024-06-04 14:54:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:16,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:54:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:54:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:54:16,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:16,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 250 transitions, 2889 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:16,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:16,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:16,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:17,106 INFO L124 PetriNetUnfolderBase]: 2899/4433 cut-off events. [2024-06-04 14:54:17,106 INFO L125 PetriNetUnfolderBase]: For 313230/313232 co-relation queries the response was YES. [2024-06-04 14:54:17,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34150 conditions, 4433 events. 2899/4433 cut-off events. For 313230/313232 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23173 event pairs, 646 based on Foata normal form. 16/4449 useless extension candidates. Maximal degree in co-relation 34055. Up to 3479 conditions per place. [2024-06-04 14:54:17,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 209 selfloop transitions, 60 changer transitions 0/293 dead transitions. [2024-06-04 14:54:17,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 293 transitions, 3600 flow [2024-06-04 14:54:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-04 14:54:17,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 14:54:17,156 INFO L175 Difference]: Start difference. First operand has 198 places, 250 transitions, 2889 flow. Second operand 8 states and 168 transitions. [2024-06-04 14:54:17,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 293 transitions, 3600 flow [2024-06-04 14:54:17,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 293 transitions, 3462 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:17,494 INFO L231 Difference]: Finished difference. Result has 200 places, 251 transitions, 2923 flow [2024-06-04 14:54:17,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2923, PETRI_PLACES=200, PETRI_TRANSITIONS=251} [2024-06-04 14:54:17,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-04 14:54:17,495 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 251 transitions, 2923 flow [2024-06-04 14:54:17,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:17,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:17,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:17,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:54:17,495 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)] === [2024-06-04 14:54:17,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash 587197473, now seen corresponding path program 5 times [2024-06-04 14:54:17,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:17,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368329952] [2024-06-04 14:54:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:17,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:18,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368329952] [2024-06-04 14:54:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368329952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:18,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:18,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:54:18,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469746348] [2024-06-04 14:54:18,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:54:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:54:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:54:18,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:54:18,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 251 transitions, 2923 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:18,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:18,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:54:18,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:19,615 INFO L124 PetriNetUnfolderBase]: 2879/4401 cut-off events. [2024-06-04 14:54:19,616 INFO L125 PetriNetUnfolderBase]: For 300715/300717 co-relation queries the response was YES. [2024-06-04 14:54:19,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33486 conditions, 4401 events. 2879/4401 cut-off events. For 300715/300717 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23005 event pairs, 749 based on Foata normal form. 12/4413 useless extension candidates. Maximal degree in co-relation 33390. Up to 4079 conditions per place. [2024-06-04 14:54:19,661 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 237 selfloop transitions, 18 changer transitions 0/279 dead transitions. [2024-06-04 14:54:19,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 279 transitions, 3463 flow [2024-06-04 14:54:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:54:19,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:54:19,663 INFO L175 Difference]: Start difference. First operand has 200 places, 251 transitions, 2923 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:54:19,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 279 transitions, 3463 flow [2024-06-04 14:54:19,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 279 transitions, 3341 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:19,995 INFO L231 Difference]: Finished difference. Result has 201 places, 250 transitions, 2795 flow [2024-06-04 14:54:19,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2795, PETRI_PLACES=201, PETRI_TRANSITIONS=250} [2024-06-04 14:54:19,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-04 14:54:19,997 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 250 transitions, 2795 flow [2024-06-04 14:54:19,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:19,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:19,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:19,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:54:19,997 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:19,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1811703470, now seen corresponding path program 5 times [2024-06-04 14:54:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:19,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132748015] [2024-06-04 14:54:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:20,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132748015] [2024-06-04 14:54:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132748015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:20,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:20,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:20,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674614808] [2024-06-04 14:54:20,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:20,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:20,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:20,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:20,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:20,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:20,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 250 transitions, 2795 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:20,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:20,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:20,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:21,433 INFO L124 PetriNetUnfolderBase]: 2957/4477 cut-off events. [2024-06-04 14:54:21,433 INFO L125 PetriNetUnfolderBase]: For 288184/288186 co-relation queries the response was YES. [2024-06-04 14:54:21,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33397 conditions, 4477 events. 2957/4477 cut-off events. For 288184/288186 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23058 event pairs, 816 based on Foata normal form. 3/4480 useless extension candidates. Maximal degree in co-relation 33300. Up to 4442 conditions per place. [2024-06-04 14:54:21,480 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 238 selfloop transitions, 19 changer transitions 0/260 dead transitions. [2024-06-04 14:54:21,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 260 transitions, 3333 flow [2024-06-04 14:54:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 14:54:21,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-04 14:54:21,481 INFO L175 Difference]: Start difference. First operand has 201 places, 250 transitions, 2795 flow. Second operand 7 states and 109 transitions. [2024-06-04 14:54:21,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 260 transitions, 3333 flow [2024-06-04 14:54:21,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 260 transitions, 3257 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:21,773 INFO L231 Difference]: Finished difference. Result has 202 places, 250 transitions, 2763 flow [2024-06-04 14:54:21,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2719, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2763, PETRI_PLACES=202, PETRI_TRANSITIONS=250} [2024-06-04 14:54:21,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-04 14:54:21,774 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 250 transitions, 2763 flow [2024-06-04 14:54:21,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:21,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:21,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:21,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:54:21,775 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:21,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1929166086, now seen corresponding path program 6 times [2024-06-04 14:54:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:21,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161407507] [2024-06-04 14:54:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:21,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:22,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:22,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161407507] [2024-06-04 14:54:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161407507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:22,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:22,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916254003] [2024-06-04 14:54:22,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:22,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:22,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:22,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 250 transitions, 2763 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:22,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:22,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:22,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:23,220 INFO L124 PetriNetUnfolderBase]: 2949/4466 cut-off events. [2024-06-04 14:54:23,221 INFO L125 PetriNetUnfolderBase]: For 297038/297040 co-relation queries the response was YES. [2024-06-04 14:54:23,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33245 conditions, 4466 events. 2949/4466 cut-off events. For 297038/297040 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23012 event pairs, 809 based on Foata normal form. 4/4470 useless extension candidates. Maximal degree in co-relation 33147. Up to 4409 conditions per place. [2024-06-04 14:54:23,266 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 228 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-06-04 14:54:23,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 260 transitions, 3301 flow [2024-06-04 14:54:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 14:54:23,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:54:23,268 INFO L175 Difference]: Start difference. First operand has 202 places, 250 transitions, 2763 flow. Second operand 7 states and 112 transitions. [2024-06-04 14:54:23,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 260 transitions, 3301 flow [2024-06-04 14:54:23,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 260 transitions, 3249 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:23,623 INFO L231 Difference]: Finished difference. Result has 204 places, 250 transitions, 2777 flow [2024-06-04 14:54:23,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2777, PETRI_PLACES=204, PETRI_TRANSITIONS=250} [2024-06-04 14:54:23,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-04 14:54:23,624 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 250 transitions, 2777 flow [2024-06-04 14:54:23,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:23,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:23,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:23,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:54:23,624 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:23,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1942060629, now seen corresponding path program 4 times [2024-06-04 14:54:23,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:23,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893938130] [2024-06-04 14:54:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:23,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:24,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893938130] [2024-06-04 14:54:24,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893938130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:24,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:24,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660956115] [2024-06-04 14:54:24,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:24,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:24,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:24,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:24,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:24,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 250 transitions, 2777 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:24,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:24,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:24,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:25,284 INFO L124 PetriNetUnfolderBase]: 3033/4583 cut-off events. [2024-06-04 14:54:25,284 INFO L125 PetriNetUnfolderBase]: For 322565/322567 co-relation queries the response was YES. [2024-06-04 14:54:25,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34507 conditions, 4583 events. 3033/4583 cut-off events. For 322565/322567 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23680 event pairs, 806 based on Foata normal form. 8/4591 useless extension candidates. Maximal degree in co-relation 34408. Up to 4457 conditions per place. [2024-06-04 14:54:25,332 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 34 changer transitions 0/274 dead transitions. [2024-06-04 14:54:25,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 274 transitions, 3582 flow [2024-06-04 14:54:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:54:25,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:54:25,348 INFO L175 Difference]: Start difference. First operand has 204 places, 250 transitions, 2777 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:54:25,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 274 transitions, 3582 flow [2024-06-04 14:54:25,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 274 transitions, 3514 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:25,669 INFO L231 Difference]: Finished difference. Result has 207 places, 258 transitions, 2929 flow [2024-06-04 14:54:25,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2929, PETRI_PLACES=207, PETRI_TRANSITIONS=258} [2024-06-04 14:54:25,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-04 14:54:25,670 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 258 transitions, 2929 flow [2024-06-04 14:54:25,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:25,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:25,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:25,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:54:25,670 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:25,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1929162459, now seen corresponding path program 5 times [2024-06-04 14:54:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:25,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398347725] [2024-06-04 14:54:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:26,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:26,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398347725] [2024-06-04 14:54:26,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398347725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:26,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589325991] [2024-06-04 14:54:26,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:26,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:26,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 258 transitions, 2929 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:26,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:26,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:27,429 INFO L124 PetriNetUnfolderBase]: 3063/4625 cut-off events. [2024-06-04 14:54:27,429 INFO L125 PetriNetUnfolderBase]: For 336244/336246 co-relation queries the response was YES. [2024-06-04 14:54:27,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35246 conditions, 4625 events. 3063/4625 cut-off events. For 336244/336246 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23897 event pairs, 804 based on Foata normal form. 8/4633 useless extension candidates. Maximal degree in co-relation 35145. Up to 4355 conditions per place. [2024-06-04 14:54:27,471 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 221 selfloop transitions, 57 changer transitions 0/281 dead transitions. [2024-06-04 14:54:27,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 281 transitions, 3811 flow [2024-06-04 14:54:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:54:27,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:54:27,472 INFO L175 Difference]: Start difference. First operand has 207 places, 258 transitions, 2929 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:54:27,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 281 transitions, 3811 flow [2024-06-04 14:54:27,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 281 transitions, 3698 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:27,824 INFO L231 Difference]: Finished difference. Result has 210 places, 262 transitions, 3001 flow [2024-06-04 14:54:27,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2816, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3001, PETRI_PLACES=210, PETRI_TRANSITIONS=262} [2024-06-04 14:54:27,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-04 14:54:27,825 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 262 transitions, 3001 flow [2024-06-04 14:54:27,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:27,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:27,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:27,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:54:27,825 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:27,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:27,826 INFO L85 PathProgramCache]: Analyzing trace with hash 781871632, now seen corresponding path program 1 times [2024-06-04 14:54:27,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:27,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62672093] [2024-06-04 14:54:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:27,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:28,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:28,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62672093] [2024-06-04 14:54:28,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62672093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:28,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:28,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:28,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847813450] [2024-06-04 14:54:28,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:28,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:28,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:28,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:28,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 262 transitions, 3001 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:28,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:28,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:28,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:29,739 INFO L124 PetriNetUnfolderBase]: 3057/4616 cut-off events. [2024-06-04 14:54:29,739 INFO L125 PetriNetUnfolderBase]: For 337549/337549 co-relation queries the response was YES. [2024-06-04 14:54:29,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35239 conditions, 4616 events. 3057/4616 cut-off events. For 337549/337549 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23752 event pairs, 819 based on Foata normal form. 2/4618 useless extension candidates. Maximal degree in co-relation 35138. Up to 4583 conditions per place. [2024-06-04 14:54:29,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 17 changer transitions 0/278 dead transitions. [2024-06-04 14:54:29,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 278 transitions, 3639 flow [2024-06-04 14:54:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 14:54:29,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-04 14:54:29,785 INFO L175 Difference]: Start difference. First operand has 210 places, 262 transitions, 3001 flow. Second operand 8 states and 121 transitions. [2024-06-04 14:54:29,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 278 transitions, 3639 flow [2024-06-04 14:54:30,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 278 transitions, 3416 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:30,168 INFO L231 Difference]: Finished difference. Result has 211 places, 265 transitions, 2882 flow [2024-06-04 14:54:30,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2882, PETRI_PLACES=211, PETRI_TRANSITIONS=265} [2024-06-04 14:54:30,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-04 14:54:30,168 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 265 transitions, 2882 flow [2024-06-04 14:54:30,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:30,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:30,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:30,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:54:30,169 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:30,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1436762420, now seen corresponding path program 3 times [2024-06-04 14:54:30,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:30,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436893882] [2024-06-04 14:54:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:30,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:31,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:31,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436893882] [2024-06-04 14:54:31,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436893882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:31,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:31,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:31,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375026955] [2024-06-04 14:54:31,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:31,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:31,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:31,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:31,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:31,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 265 transitions, 2882 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:31,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:31,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:31,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:31,922 INFO L124 PetriNetUnfolderBase]: 3051/4609 cut-off events. [2024-06-04 14:54:31,922 INFO L125 PetriNetUnfolderBase]: For 345051/345053 co-relation queries the response was YES. [2024-06-04 14:54:32,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34967 conditions, 4609 events. 3051/4609 cut-off events. For 345051/345053 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23813 event pairs, 828 based on Foata normal form. 4/4613 useless extension candidates. Maximal degree in co-relation 34866. Up to 4546 conditions per place. [2024-06-04 14:54:32,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 35 changer transitions 0/277 dead transitions. [2024-06-04 14:54:32,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 277 transitions, 3463 flow [2024-06-04 14:54:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 14:54:32,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 14:54:32,051 INFO L175 Difference]: Start difference. First operand has 211 places, 265 transitions, 2882 flow. Second operand 8 states and 125 transitions. [2024-06-04 14:54:32,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 277 transitions, 3463 flow [2024-06-04 14:54:32,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 277 transitions, 3357 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:32,363 INFO L231 Difference]: Finished difference. Result has 213 places, 266 transitions, 2862 flow [2024-06-04 14:54:32,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2862, PETRI_PLACES=213, PETRI_TRANSITIONS=266} [2024-06-04 14:54:32,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-04 14:54:32,364 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 266 transitions, 2862 flow [2024-06-04 14:54:32,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:32,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:32,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:32,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:54:32,365 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)] === [2024-06-04 14:54:32,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1436750919, now seen corresponding path program 6 times [2024-06-04 14:54:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:32,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267592908] [2024-06-04 14:54:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:33,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:33,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267592908] [2024-06-04 14:54:33,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267592908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:33,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:33,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:33,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200989644] [2024-06-04 14:54:33,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:33,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:33,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:33,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:33,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:33,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 266 transitions, 2862 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:33,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:33,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:33,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:33,871 INFO L124 PetriNetUnfolderBase]: 3039/4594 cut-off events. [2024-06-04 14:54:33,871 INFO L125 PetriNetUnfolderBase]: For 353250/353252 co-relation queries the response was YES. [2024-06-04 14:54:33,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34704 conditions, 4594 events. 3039/4594 cut-off events. For 353250/353252 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23743 event pairs, 813 based on Foata normal form. 8/4602 useless extension candidates. Maximal degree in co-relation 34602. Up to 4335 conditions per place. [2024-06-04 14:54:33,922 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 230 selfloop transitions, 52 changer transitions 0/285 dead transitions. [2024-06-04 14:54:33,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 285 transitions, 3700 flow [2024-06-04 14:54:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:54:33,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:54:33,924 INFO L175 Difference]: Start difference. First operand has 213 places, 266 transitions, 2862 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:54:33,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 285 transitions, 3700 flow [2024-06-04 14:54:34,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 285 transitions, 3593 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:34,347 INFO L231 Difference]: Finished difference. Result has 215 places, 266 transitions, 2873 flow [2024-06-04 14:54:34,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2873, PETRI_PLACES=215, PETRI_TRANSITIONS=266} [2024-06-04 14:54:34,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-04 14:54:34,347 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 266 transitions, 2873 flow [2024-06-04 14:54:34,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:34,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:34,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:34,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:54:34,348 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)] === [2024-06-04 14:54:34,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:34,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1858394229, now seen corresponding path program 1 times [2024-06-04 14:54:34,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:34,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530566731] [2024-06-04 14:54:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:34,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:35,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:35,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530566731] [2024-06-04 14:54:35,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530566731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:35,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:35,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62103464] [2024-06-04 14:54:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:35,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:35,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:35,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:35,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 266 transitions, 2873 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:35,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:35,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:35,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:36,276 INFO L124 PetriNetUnfolderBase]: 3069/4635 cut-off events. [2024-06-04 14:54:36,276 INFO L125 PetriNetUnfolderBase]: For 367554/367554 co-relation queries the response was YES. [2024-06-04 14:54:36,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35140 conditions, 4635 events. 3069/4635 cut-off events. For 367554/367554 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23904 event pairs, 820 based on Foata normal form. 6/4641 useless extension candidates. Maximal degree in co-relation 35037. Up to 4563 conditions per place. [2024-06-04 14:54:36,331 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 19 changer transitions 0/290 dead transitions. [2024-06-04 14:54:36,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 290 transitions, 3547 flow [2024-06-04 14:54:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-04 14:54:36,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-04 14:54:36,333 INFO L175 Difference]: Start difference. First operand has 215 places, 266 transitions, 2873 flow. Second operand 8 states and 130 transitions. [2024-06-04 14:54:36,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 290 transitions, 3547 flow [2024-06-04 14:54:36,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 290 transitions, 3397 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:36,871 INFO L231 Difference]: Finished difference. Result has 216 places, 269 transitions, 2817 flow [2024-06-04 14:54:36,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2817, PETRI_PLACES=216, PETRI_TRANSITIONS=269} [2024-06-04 14:54:36,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-04 14:54:36,872 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 269 transitions, 2817 flow [2024-06-04 14:54:36,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:36,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:36,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:36,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:54:36,872 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)] === [2024-06-04 14:54:36,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1667826611, now seen corresponding path program 2 times [2024-06-04 14:54:36,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605052372] [2024-06-04 14:54:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:36,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:37,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605052372] [2024-06-04 14:54:37,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605052372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:37,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:37,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:37,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300677424] [2024-06-04 14:54:37,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:37,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:37,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:37,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:37,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 269 transitions, 2817 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:37,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:37,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:37,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:38,801 INFO L124 PetriNetUnfolderBase]: 3147/4743 cut-off events. [2024-06-04 14:54:38,801 INFO L125 PetriNetUnfolderBase]: For 389885/389885 co-relation queries the response was YES. [2024-06-04 14:54:38,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36315 conditions, 4743 events. 3147/4743 cut-off events. For 389885/389885 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24475 event pairs, 823 based on Foata normal form. 6/4749 useless extension candidates. Maximal degree in co-relation 36212. Up to 4498 conditions per place. [2024-06-04 14:54:38,855 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 52 changer transitions 0/306 dead transitions. [2024-06-04 14:54:38,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 306 transitions, 3882 flow [2024-06-04 14:54:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:54:38,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:54:38,857 INFO L175 Difference]: Start difference. First operand has 216 places, 269 transitions, 2817 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:54:38,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 306 transitions, 3882 flow [2024-06-04 14:54:39,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 306 transitions, 3812 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:39,246 INFO L231 Difference]: Finished difference. Result has 218 places, 278 transitions, 3014 flow [2024-06-04 14:54:39,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3014, PETRI_PLACES=218, PETRI_TRANSITIONS=278} [2024-06-04 14:54:39,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 14:54:39,247 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 278 transitions, 3014 flow [2024-06-04 14:54:39,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:39,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:39,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:39,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:54:39,247 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:39,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:39,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1667821031, now seen corresponding path program 3 times [2024-06-04 14:54:39,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:39,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929867933] [2024-06-04 14:54:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:39,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:39,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929867933] [2024-06-04 14:54:39,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929867933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:39,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:39,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:39,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036540846] [2024-06-04 14:54:39,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:39,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:39,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:40,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:40,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 278 transitions, 3014 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:40,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:40,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:40,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:41,089 INFO L124 PetriNetUnfolderBase]: 3129/4719 cut-off events. [2024-06-04 14:54:41,089 INFO L125 PetriNetUnfolderBase]: For 394400/394400 co-relation queries the response was YES. [2024-06-04 14:54:41,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36353 conditions, 4719 events. 3129/4719 cut-off events. For 394400/394400 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24363 event pairs, 819 based on Foata normal form. 6/4725 useless extension candidates. Maximal degree in co-relation 36249. Up to 4487 conditions per place. [2024-06-04 14:54:41,225 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 51 changer transitions 0/307 dead transitions. [2024-06-04 14:54:41,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 307 transitions, 3823 flow [2024-06-04 14:54:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:54:41,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-04 14:54:41,227 INFO L175 Difference]: Start difference. First operand has 218 places, 278 transitions, 3014 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:54:41,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 307 transitions, 3823 flow [2024-06-04 14:54:41,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 307 transitions, 3726 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:41,677 INFO L231 Difference]: Finished difference. Result has 223 places, 278 transitions, 3025 flow [2024-06-04 14:54:41,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2917, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3025, PETRI_PLACES=223, PETRI_TRANSITIONS=278} [2024-06-04 14:54:41,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 14:54:41,678 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 278 transitions, 3025 flow [2024-06-04 14:54:41,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:41,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:41,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:41,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:54:41,678 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:41,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:41,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1932515093, now seen corresponding path program 4 times [2024-06-04 14:54:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:41,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024938777] [2024-06-04 14:54:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:41,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:42,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:42,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024938777] [2024-06-04 14:54:42,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024938777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:42,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:42,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678504863] [2024-06-04 14:54:42,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:42,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:42,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 278 transitions, 3025 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:42,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:42,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:42,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:43,628 INFO L124 PetriNetUnfolderBase]: 3207/4829 cut-off events. [2024-06-04 14:54:43,628 INFO L125 PetriNetUnfolderBase]: For 419050/419052 co-relation queries the response was YES. [2024-06-04 14:54:43,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37645 conditions, 4829 events. 3207/4829 cut-off events. For 419050/419052 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24981 event pairs, 837 based on Foata normal form. 6/4835 useless extension candidates. Maximal degree in co-relation 37539. Up to 4542 conditions per place. [2024-06-04 14:54:43,683 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 57 changer transitions 0/311 dead transitions. [2024-06-04 14:54:43,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 311 transitions, 4081 flow [2024-06-04 14:54:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:54:43,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 14:54:43,685 INFO L175 Difference]: Start difference. First operand has 223 places, 278 transitions, 3025 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:54:43,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 311 transitions, 4081 flow [2024-06-04 14:54:44,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 311 transitions, 3974 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:44,245 INFO L231 Difference]: Finished difference. Result has 225 places, 284 transitions, 3159 flow [2024-06-04 14:54:44,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3159, PETRI_PLACES=225, PETRI_TRANSITIONS=284} [2024-06-04 14:54:44,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-04 14:54:44,245 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 284 transitions, 3159 flow [2024-06-04 14:54:44,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:44,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:44,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:44,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:54:44,246 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:44,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1423679211, now seen corresponding path program 5 times [2024-06-04 14:54:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:44,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444610690] [2024-06-04 14:54:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444610690] [2024-06-04 14:54:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444610690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:44,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:44,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:44,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602274015] [2024-06-04 14:54:44,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:44,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:44,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:44,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:45,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:45,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 284 transitions, 3159 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:45,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:45,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:45,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:46,095 INFO L124 PetriNetUnfolderBase]: 3189/4805 cut-off events. [2024-06-04 14:54:46,095 INFO L125 PetriNetUnfolderBase]: For 421854/421856 co-relation queries the response was YES. [2024-06-04 14:54:46,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37326 conditions, 4805 events. 3189/4805 cut-off events. For 421854/421856 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24847 event pairs, 826 based on Foata normal form. 6/4811 useless extension candidates. Maximal degree in co-relation 37219. Up to 4531 conditions per place. [2024-06-04 14:54:46,152 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 60 changer transitions 0/305 dead transitions. [2024-06-04 14:54:46,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 305 transitions, 3944 flow [2024-06-04 14:54:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:54:46,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:54:46,154 INFO L175 Difference]: Start difference. First operand has 225 places, 284 transitions, 3159 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:54:46,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 305 transitions, 3944 flow [2024-06-04 14:54:46,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 305 transitions, 3723 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:46,661 INFO L231 Difference]: Finished difference. Result has 227 places, 284 transitions, 3065 flow [2024-06-04 14:54:46,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3065, PETRI_PLACES=227, PETRI_TRANSITIONS=284} [2024-06-04 14:54:46,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-04 14:54:46,662 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 284 transitions, 3065 flow [2024-06-04 14:54:46,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:46,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:46,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:46,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:54:46,663 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)] === [2024-06-04 14:54:46,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1934888097, now seen corresponding path program 6 times [2024-06-04 14:54:46,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:46,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726265697] [2024-06-04 14:54:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:46,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:47,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:47,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726265697] [2024-06-04 14:54:47,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726265697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:47,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:47,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:47,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609757638] [2024-06-04 14:54:47,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:47,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:47,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:47,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:47,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 284 transitions, 3065 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:47,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:47,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:47,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:48,341 INFO L124 PetriNetUnfolderBase]: 3171/4781 cut-off events. [2024-06-04 14:54:48,341 INFO L125 PetriNetUnfolderBase]: For 420392/420394 co-relation queries the response was YES. [2024-06-04 14:54:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36717 conditions, 4781 events. 3171/4781 cut-off events. For 420392/420394 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24704 event pairs, 828 based on Foata normal form. 6/4787 useless extension candidates. Maximal degree in co-relation 36609. Up to 4520 conditions per place. [2024-06-04 14:54:48,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 59 changer transitions 0/306 dead transitions. [2024-06-04 14:54:48,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 306 transitions, 3736 flow [2024-06-04 14:54:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 14:54:48,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-04 14:54:48,394 INFO L175 Difference]: Start difference. First operand has 227 places, 284 transitions, 3065 flow. Second operand 8 states and 138 transitions. [2024-06-04 14:54:48,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 306 transitions, 3736 flow [2024-06-04 14:54:48,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 306 transitions, 3571 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:48,878 INFO L231 Difference]: Finished difference. Result has 228 places, 284 transitions, 3024 flow [2024-06-04 14:54:48,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3024, PETRI_PLACES=228, PETRI_TRANSITIONS=284} [2024-06-04 14:54:48,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-04 14:54:48,879 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 284 transitions, 3024 flow [2024-06-04 14:54:48,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:48,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:48,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:48,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:54:48,879 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:48,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1942522374, now seen corresponding path program 1 times [2024-06-04 14:54:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:48,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344389337] [2024-06-04 14:54:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:48,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:50,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:50,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344389337] [2024-06-04 14:54:50,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344389337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:50,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:50,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:50,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989995142] [2024-06-04 14:54:50,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:50,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:50,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:50,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:50,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:50,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 284 transitions, 3024 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:50,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:50,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:50,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:51,143 INFO L124 PetriNetUnfolderBase]: 3166/4772 cut-off events. [2024-06-04 14:54:51,144 INFO L125 PetriNetUnfolderBase]: For 421291/421291 co-relation queries the response was YES. [2024-06-04 14:54:51,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36601 conditions, 4772 events. 3166/4772 cut-off events. For 421291/421291 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24565 event pairs, 831 based on Foata normal form. 2/4774 useless extension candidates. Maximal degree in co-relation 36492. Up to 4741 conditions per place. [2024-06-04 14:54:51,204 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 280 selfloop transitions, 16 changer transitions 0/299 dead transitions. [2024-06-04 14:54:51,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 299 transitions, 3698 flow [2024-06-04 14:54:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-04 14:54:51,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-04 14:54:51,212 INFO L175 Difference]: Start difference. First operand has 228 places, 284 transitions, 3024 flow. Second operand 8 states and 120 transitions. [2024-06-04 14:54:51,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 299 transitions, 3698 flow [2024-06-04 14:54:51,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 299 transitions, 3568 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:51,640 INFO L231 Difference]: Finished difference. Result has 229 places, 286 transitions, 2987 flow [2024-06-04 14:54:51,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2987, PETRI_PLACES=229, PETRI_TRANSITIONS=286} [2024-06-04 14:54:51,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-04 14:54:51,641 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 286 transitions, 2987 flow [2024-06-04 14:54:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:51,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:51,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:51,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:54:51,642 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:51,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:51,642 INFO L85 PathProgramCache]: Analyzing trace with hash 180760728, now seen corresponding path program 1 times [2024-06-04 14:54:51,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:51,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598316627] [2024-06-04 14:54:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:51,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:52,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:52,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598316627] [2024-06-04 14:54:52,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598316627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:52,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:52,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:52,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614794448] [2024-06-04 14:54:52,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:52,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:52,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:52,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:52,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:52,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 286 transitions, 2987 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:52,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:52,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:52,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:53,822 INFO L124 PetriNetUnfolderBase]: 3195/4816 cut-off events. [2024-06-04 14:54:53,822 INFO L125 PetriNetUnfolderBase]: For 443056/443058 co-relation queries the response was YES. [2024-06-04 14:54:53,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37138 conditions, 4816 events. 3195/4816 cut-off events. For 443056/443058 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24859 event pairs, 690 based on Foata normal form. 6/4822 useless extension candidates. Maximal degree in co-relation 37028. Up to 4516 conditions per place. [2024-06-04 14:54:53,866 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 244 selfloop transitions, 82 changer transitions 0/329 dead transitions. [2024-06-04 14:54:53,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 329 transitions, 3993 flow [2024-06-04 14:54:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 14:54:53,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 14:54:53,867 INFO L175 Difference]: Start difference. First operand has 229 places, 286 transitions, 2987 flow. Second operand 9 states and 165 transitions. [2024-06-04 14:54:53,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 329 transitions, 3993 flow [2024-06-04 14:54:54,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 329 transitions, 3916 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:54,396 INFO L231 Difference]: Finished difference. Result has 233 places, 293 transitions, 3235 flow [2024-06-04 14:54:54,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3235, PETRI_PLACES=233, PETRI_TRANSITIONS=293} [2024-06-04 14:54:54,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-04 14:54:54,397 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 293 transitions, 3235 flow [2024-06-04 14:54:54,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:54,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:54,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:54,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:54:54,398 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:54:54,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:54,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1265422490, now seen corresponding path program 2 times [2024-06-04 14:54:54,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:54,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192063177] [2024-06-04 14:54:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:54,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:55,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:55,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192063177] [2024-06-04 14:54:55,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192063177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:55,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:55,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:55,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888104212] [2024-06-04 14:54:55,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:55,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:55,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:55,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:55,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:55,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 293 transitions, 3235 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:55,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:55,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:55,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:56,414 INFO L124 PetriNetUnfolderBase]: 3221/4854 cut-off events. [2024-06-04 14:54:56,414 INFO L125 PetriNetUnfolderBase]: For 459057/459059 co-relation queries the response was YES. [2024-06-04 14:54:56,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38143 conditions, 4854 events. 3221/4854 cut-off events. For 459057/459059 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25187 event pairs, 849 based on Foata normal form. 6/4860 useless extension candidates. Maximal degree in co-relation 38031. Up to 4630 conditions per place. [2024-06-04 14:54:56,473 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 82 changer transitions 0/331 dead transitions. [2024-06-04 14:54:56,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 331 transitions, 4067 flow [2024-06-04 14:54:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 14:54:56,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 14:54:56,474 INFO L175 Difference]: Start difference. First operand has 233 places, 293 transitions, 3235 flow. Second operand 9 states and 160 transitions. [2024-06-04 14:54:56,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 331 transitions, 4067 flow [2024-06-04 14:54:57,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 331 transitions, 3836 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:57,005 INFO L231 Difference]: Finished difference. Result has 237 places, 300 transitions, 3278 flow [2024-06-04 14:54:57,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3278, PETRI_PLACES=237, PETRI_TRANSITIONS=300} [2024-06-04 14:54:57,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 14:54:57,005 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 300 transitions, 3278 flow [2024-06-04 14:54:57,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:57,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:57,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:57,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:54:57,006 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)] === [2024-06-04 14:54:57,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:57,013 INFO L85 PathProgramCache]: Analyzing trace with hash 181000048, now seen corresponding path program 1 times [2024-06-04 14:54:57,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:57,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458394458] [2024-06-04 14:54:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:57,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:57,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:57,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458394458] [2024-06-04 14:54:57,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458394458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:57,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:57,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:57,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454649151] [2024-06-04 14:54:57,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:57,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:57,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:58,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:58,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 300 transitions, 3278 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:58,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:58,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:59,141 INFO L124 PetriNetUnfolderBase]: 3336/5013 cut-off events. [2024-06-04 14:54:59,141 INFO L125 PetriNetUnfolderBase]: For 497303/497305 co-relation queries the response was YES. [2024-06-04 14:54:59,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39874 conditions, 5013 events. 3336/5013 cut-off events. For 497303/497305 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26074 event pairs, 800 based on Foata normal form. 8/5021 useless extension candidates. Maximal degree in co-relation 39760. Up to 4254 conditions per place. [2024-06-04 14:54:59,202 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 228 selfloop transitions, 142 changer transitions 0/373 dead transitions. [2024-06-04 14:54:59,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 373 transitions, 4891 flow [2024-06-04 14:54:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:54:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:54:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-04 14:54:59,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-04 14:54:59,204 INFO L175 Difference]: Start difference. First operand has 237 places, 300 transitions, 3278 flow. Second operand 11 states and 204 transitions. [2024-06-04 14:54:59,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 373 transitions, 4891 flow [2024-06-04 14:54:59,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 373 transitions, 4734 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:59,963 INFO L231 Difference]: Finished difference. Result has 246 places, 328 transitions, 3935 flow [2024-06-04 14:54:59,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3935, PETRI_PLACES=246, PETRI_TRANSITIONS=328} [2024-06-04 14:54:59,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-04 14:54:59,966 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 328 transitions, 3935 flow [2024-06-04 14:54:59,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:59,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:59,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:59,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:54:59,966 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)] === [2024-06-04 14:54:59,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash 189331608, now seen corresponding path program 3 times [2024-06-04 14:54:59,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:59,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023167543] [2024-06-04 14:54:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:59,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:00,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023167543] [2024-06-04 14:55:00,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023167543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:00,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:00,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759091294] [2024-06-04 14:55:00,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:00,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:00,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:00,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:00,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 328 transitions, 3935 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:00,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:00,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:00,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:02,032 INFO L124 PetriNetUnfolderBase]: 3352/5037 cut-off events. [2024-06-04 14:55:02,032 INFO L125 PetriNetUnfolderBase]: For 511285/511287 co-relation queries the response was YES. [2024-06-04 14:55:02,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42275 conditions, 5037 events. 3352/5037 cut-off events. For 511285/511287 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26172 event pairs, 854 based on Foata normal form. 6/5043 useless extension candidates. Maximal degree in co-relation 42157. Up to 4855 conditions per place. [2024-06-04 14:55:02,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 67 changer transitions 0/356 dead transitions. [2024-06-04 14:55:02,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 356 transitions, 4746 flow [2024-06-04 14:55:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 14:55:02,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:55:02,101 INFO L175 Difference]: Start difference. First operand has 246 places, 328 transitions, 3935 flow. Second operand 9 states and 153 transitions. [2024-06-04 14:55:02,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 356 transitions, 4746 flow [2024-06-04 14:55:02,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 356 transitions, 4596 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-04 14:55:02,830 INFO L231 Difference]: Finished difference. Result has 251 places, 331 transitions, 3974 flow [2024-06-04 14:55:02,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3785, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3974, PETRI_PLACES=251, PETRI_TRANSITIONS=331} [2024-06-04 14:55:02,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-04 14:55:02,831 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 331 transitions, 3974 flow [2024-06-04 14:55:02,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:02,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:02,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:02,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:55:02,831 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)] === [2024-06-04 14:55:02,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:02,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1383513332, now seen corresponding path program 1 times [2024-06-04 14:55:02,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:02,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767525838] [2024-06-04 14:55:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:02,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:03,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:03,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767525838] [2024-06-04 14:55:03,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767525838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:03,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:03,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496418400] [2024-06-04 14:55:03,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:03,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:03,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:03,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:03,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 331 transitions, 3974 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:03,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:03,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:03,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:04,607 INFO L124 PetriNetUnfolderBase]: 3372/5066 cut-off events. [2024-06-04 14:55:04,608 INFO L125 PetriNetUnfolderBase]: For 521837/521839 co-relation queries the response was YES. [2024-06-04 14:55:04,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42146 conditions, 5066 events. 3372/5066 cut-off events. For 521837/521839 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26404 event pairs, 808 based on Foata normal form. 6/5072 useless extension candidates. Maximal degree in co-relation 42025. Up to 4813 conditions per place. [2024-06-04 14:55:04,672 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 321 selfloop transitions, 37 changer transitions 0/361 dead transitions. [2024-06-04 14:55:04,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 361 transitions, 4830 flow [2024-06-04 14:55:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:55:04,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 14:55:04,673 INFO L175 Difference]: Start difference. First operand has 251 places, 331 transitions, 3974 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:55:04,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 361 transitions, 4830 flow [2024-06-04 14:55:05,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 361 transitions, 4647 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:05,474 INFO L231 Difference]: Finished difference. Result has 251 places, 335 transitions, 3950 flow [2024-06-04 14:55:05,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3950, PETRI_PLACES=251, PETRI_TRANSITIONS=335} [2024-06-04 14:55:05,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-04 14:55:05,475 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 335 transitions, 3950 flow [2024-06-04 14:55:05,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:05,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:05,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:55:05,476 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:05,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1383633302, now seen corresponding path program 2 times [2024-06-04 14:55:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:05,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658821644] [2024-06-04 14:55:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:05,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:06,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:06,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658821644] [2024-06-04 14:55:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658821644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:06,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:06,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135445881] [2024-06-04 14:55:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:06,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:06,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:06,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:06,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:06,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 335 transitions, 3950 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:06,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:06,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:06,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:07,309 INFO L124 PetriNetUnfolderBase]: 3440/5160 cut-off events. [2024-06-04 14:55:07,310 INFO L125 PetriNetUnfolderBase]: For 552450/552452 co-relation queries the response was YES. [2024-06-04 14:55:07,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43854 conditions, 5160 events. 3440/5160 cut-off events. For 552450/552452 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26869 event pairs, 817 based on Foata normal form. 6/5166 useless extension candidates. Maximal degree in co-relation 43732. Up to 4726 conditions per place. [2024-06-04 14:55:07,373 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 76 changer transitions 0/380 dead transitions. [2024-06-04 14:55:07,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 380 transitions, 5329 flow [2024-06-04 14:55:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 14:55:07,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 14:55:07,375 INFO L175 Difference]: Start difference. First operand has 251 places, 335 transitions, 3950 flow. Second operand 8 states and 147 transitions. [2024-06-04 14:55:07,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 380 transitions, 5329 flow [2024-06-04 14:55:08,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 380 transitions, 5177 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:08,162 INFO L231 Difference]: Finished difference. Result has 255 places, 353 transitions, 4280 flow [2024-06-04 14:55:08,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4280, PETRI_PLACES=255, PETRI_TRANSITIONS=353} [2024-06-04 14:55:08,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-04 14:55:08,163 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 353 transitions, 4280 flow [2024-06-04 14:55:08,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:08,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:08,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:08,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:55:08,164 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:08,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1383633488, now seen corresponding path program 1 times [2024-06-04 14:55:08,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:08,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494463588] [2024-06-04 14:55:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:08,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:08,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494463588] [2024-06-04 14:55:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494463588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:08,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386447572] [2024-06-04 14:55:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:08,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:08,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:08,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 353 transitions, 4280 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:08,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:08,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:08,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:10,149 INFO L124 PetriNetUnfolderBase]: 3542/5300 cut-off events. [2024-06-04 14:55:10,149 INFO L125 PetriNetUnfolderBase]: For 600800/600802 co-relation queries the response was YES. [2024-06-04 14:55:10,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46457 conditions, 5300 events. 3542/5300 cut-off events. For 600800/600802 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27619 event pairs, 819 based on Foata normal form. 8/5308 useless extension candidates. Maximal degree in co-relation 46332. Up to 4717 conditions per place. [2024-06-04 14:55:10,207 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 287 selfloop transitions, 104 changer transitions 0/394 dead transitions. [2024-06-04 14:55:10,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 394 transitions, 5628 flow [2024-06-04 14:55:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:10,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 14:55:10,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 14:55:10,208 INFO L175 Difference]: Start difference. First operand has 255 places, 353 transitions, 4280 flow. Second operand 8 states and 148 transitions. [2024-06-04 14:55:10,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 394 transitions, 5628 flow [2024-06-04 14:55:11,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 394 transitions, 5520 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-04 14:55:11,012 INFO L231 Difference]: Finished difference. Result has 262 places, 366 transitions, 4631 flow [2024-06-04 14:55:11,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4631, PETRI_PLACES=262, PETRI_TRANSITIONS=366} [2024-06-04 14:55:11,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-04 14:55:11,013 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 366 transitions, 4631 flow [2024-06-04 14:55:11,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:11,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:11,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:11,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:55:11,014 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)] === [2024-06-04 14:55:11,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:11,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1561002158, now seen corresponding path program 2 times [2024-06-04 14:55:11,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:11,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667512302] [2024-06-04 14:55:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:11,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:11,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:11,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667512302] [2024-06-04 14:55:11,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667512302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:11,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:11,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474074532] [2024-06-04 14:55:11,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:11,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:11,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:11,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 366 transitions, 4631 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:11,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:11,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:11,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:12,865 INFO L124 PetriNetUnfolderBase]: 3572/5342 cut-off events. [2024-06-04 14:55:12,865 INFO L125 PetriNetUnfolderBase]: For 617445/617447 co-relation queries the response was YES. [2024-06-04 14:55:12,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47424 conditions, 5342 events. 3572/5342 cut-off events. For 617445/617447 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27869 event pairs, 844 based on Foata normal form. 8/5350 useless extension candidates. Maximal degree in co-relation 47295. Up to 4739 conditions per place. [2024-06-04 14:55:12,936 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 96 changer transitions 0/395 dead transitions. [2024-06-04 14:55:12,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 395 transitions, 5848 flow [2024-06-04 14:55:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:55:12,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-04 14:55:12,937 INFO L175 Difference]: Start difference. First operand has 262 places, 366 transitions, 4631 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:55:12,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 395 transitions, 5848 flow [2024-06-04 14:55:13,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 395 transitions, 5676 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:13,941 INFO L231 Difference]: Finished difference. Result has 265 places, 370 transitions, 4734 flow [2024-06-04 14:55:13,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4734, PETRI_PLACES=265, PETRI_TRANSITIONS=370} [2024-06-04 14:55:13,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-04 14:55:13,942 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 370 transitions, 4734 flow [2024-06-04 14:55:13,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:13,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:13,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:55:13,943 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:13,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 476342256, now seen corresponding path program 3 times [2024-06-04 14:55:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757475475] [2024-06-04 14:55:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:14,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:14,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757475475] [2024-06-04 14:55:14,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757475475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:14,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:14,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:14,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681219269] [2024-06-04 14:55:14,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:14,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:14,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:14,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:14,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:14,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:14,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 370 transitions, 4734 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:14,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:14,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:14,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:15,656 INFO L124 PetriNetUnfolderBase]: 3554/5318 cut-off events. [2024-06-04 14:55:15,657 INFO L125 PetriNetUnfolderBase]: For 620004/620006 co-relation queries the response was YES. [2024-06-04 14:55:15,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46978 conditions, 5318 events. 3554/5318 cut-off events. For 620004/620006 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27713 event pairs, 837 based on Foata normal form. 8/5326 useless extension candidates. Maximal degree in co-relation 46849. Up to 4728 conditions per place. [2024-06-04 14:55:15,728 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 298 selfloop transitions, 96 changer transitions 0/397 dead transitions. [2024-06-04 14:55:15,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 397 transitions, 5900 flow [2024-06-04 14:55:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-04 14:55:15,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-04 14:55:15,730 INFO L175 Difference]: Start difference. First operand has 265 places, 370 transitions, 4734 flow. Second operand 8 states and 148 transitions. [2024-06-04 14:55:15,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 397 transitions, 5900 flow [2024-06-04 14:55:16,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 397 transitions, 5731 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:16,631 INFO L231 Difference]: Finished difference. Result has 268 places, 370 transitions, 4764 flow [2024-06-04 14:55:16,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4764, PETRI_PLACES=268, PETRI_TRANSITIONS=370} [2024-06-04 14:55:16,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-04 14:55:16,631 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 370 transitions, 4764 flow [2024-06-04 14:55:16,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:16,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:16,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:16,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:55:16,632 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:16,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash 476342070, now seen corresponding path program 3 times [2024-06-04 14:55:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:16,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323353340] [2024-06-04 14:55:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:16,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:17,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:17,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323353340] [2024-06-04 14:55:17,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323353340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:17,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:17,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:17,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224174883] [2024-06-04 14:55:17,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:17,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:17,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:17,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 370 transitions, 4764 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:17,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:17,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:17,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:18,503 INFO L124 PetriNetUnfolderBase]: 3606/5391 cut-off events. [2024-06-04 14:55:18,504 INFO L125 PetriNetUnfolderBase]: For 642805/642807 co-relation queries the response was YES. [2024-06-04 14:55:18,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48124 conditions, 5391 events. 3606/5391 cut-off events. For 642805/642807 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 28176 event pairs, 833 based on Foata normal form. 6/5397 useless extension candidates. Maximal degree in co-relation 47994. Up to 4925 conditions per place. [2024-06-04 14:55:18,574 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 319 selfloop transitions, 79 changer transitions 0/401 dead transitions. [2024-06-04 14:55:18,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 401 transitions, 6092 flow [2024-06-04 14:55:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:55:18,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 14:55:18,576 INFO L175 Difference]: Start difference. First operand has 268 places, 370 transitions, 4764 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:55:18,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 401 transitions, 6092 flow [2024-06-04 14:55:19,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 401 transitions, 5925 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:19,502 INFO L231 Difference]: Finished difference. Result has 271 places, 377 transitions, 4888 flow [2024-06-04 14:55:19,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4888, PETRI_PLACES=271, PETRI_TRANSITIONS=377} [2024-06-04 14:55:19,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-04 14:55:19,503 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 377 transitions, 4888 flow [2024-06-04 14:55:19,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:19,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:19,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:55:19,504 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:19,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash 476575438, now seen corresponding path program 2 times [2024-06-04 14:55:19,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:19,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691776026] [2024-06-04 14:55:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:19,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:20,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691776026] [2024-06-04 14:55:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691776026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:20,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403589202] [2024-06-04 14:55:20,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:20,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:20,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 377 transitions, 4888 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:20,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:20,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:20,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:21,616 INFO L124 PetriNetUnfolderBase]: 3618/5407 cut-off events. [2024-06-04 14:55:21,616 INFO L125 PetriNetUnfolderBase]: For 654546/654548 co-relation queries the response was YES. [2024-06-04 14:55:21,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48309 conditions, 5407 events. 3618/5407 cut-off events. For 654546/654548 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28327 event pairs, 816 based on Foata normal form. 4/5411 useless extension candidates. Maximal degree in co-relation 48178. Up to 5102 conditions per place. [2024-06-04 14:55:21,689 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 359 selfloop transitions, 87 changer transitions 0/449 dead transitions. [2024-06-04 14:55:21,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 449 transitions, 6822 flow [2024-06-04 14:55:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 14:55:21,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 14:55:21,691 INFO L175 Difference]: Start difference. First operand has 271 places, 377 transitions, 4888 flow. Second operand 9 states and 152 transitions. [2024-06-04 14:55:21,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 449 transitions, 6822 flow [2024-06-04 14:55:22,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 449 transitions, 6679 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 14:55:22,698 INFO L231 Difference]: Finished difference. Result has 279 places, 415 transitions, 5543 flow [2024-06-04 14:55:22,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5543, PETRI_PLACES=279, PETRI_TRANSITIONS=415} [2024-06-04 14:55:22,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-04 14:55:22,699 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 415 transitions, 5543 flow [2024-06-04 14:55:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:22,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:22,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:22,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:55:22,699 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:22,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash 476229478, now seen corresponding path program 3 times [2024-06-04 14:55:22,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:22,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762747711] [2024-06-04 14:55:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:22,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762747711] [2024-06-04 14:55:23,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762747711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:23,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:23,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:23,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199939686] [2024-06-04 14:55:23,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:23,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:23,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:23,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 415 transitions, 5543 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:23,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:23,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:23,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:25,130 INFO L124 PetriNetUnfolderBase]: 3648/5449 cut-off events. [2024-06-04 14:55:25,130 INFO L125 PetriNetUnfolderBase]: For 683556/683558 co-relation queries the response was YES. [2024-06-04 14:55:25,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49351 conditions, 5449 events. 3648/5449 cut-off events. For 683556/683558 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28509 event pairs, 852 based on Foata normal form. 8/5457 useless extension candidates. Maximal degree in co-relation 49216. Up to 4763 conditions per place. [2024-06-04 14:55:25,199 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 298 selfloop transitions, 147 changer transitions 0/448 dead transitions. [2024-06-04 14:55:25,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 448 transitions, 6889 flow [2024-06-04 14:55:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:55:25,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-04 14:55:25,201 INFO L175 Difference]: Start difference. First operand has 279 places, 415 transitions, 5543 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:55:25,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 448 transitions, 6889 flow [2024-06-04 14:55:26,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 448 transitions, 6800 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 14:55:26,282 INFO L231 Difference]: Finished difference. Result has 285 places, 420 transitions, 5842 flow [2024-06-04 14:55:26,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5458, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5842, PETRI_PLACES=285, PETRI_TRANSITIONS=420} [2024-06-04 14:55:26,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-04 14:55:26,292 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 420 transitions, 5842 flow [2024-06-04 14:55:26,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:26,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:26,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:26,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:55:26,293 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:26,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:26,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1560642000, now seen corresponding path program 4 times [2024-06-04 14:55:26,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:26,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771557660] [2024-06-04 14:55:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:26,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:27,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771557660] [2024-06-04 14:55:27,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771557660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:27,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:27,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:27,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112657003] [2024-06-04 14:55:27,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:27,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:27,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:27,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 420 transitions, 5842 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:27,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:27,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:27,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:28,359 INFO L124 PetriNetUnfolderBase]: 3658/5463 cut-off events. [2024-06-04 14:55:28,360 INFO L125 PetriNetUnfolderBase]: For 693702/693704 co-relation queries the response was YES. [2024-06-04 14:55:28,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50209 conditions, 5463 events. 3658/5463 cut-off events. For 693702/693704 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28601 event pairs, 815 based on Foata normal form. 4/5467 useless extension candidates. Maximal degree in co-relation 50072. Up to 5140 conditions per place. [2024-06-04 14:55:28,570 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 359 selfloop transitions, 100 changer transitions 0/462 dead transitions. [2024-06-04 14:55:28,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 462 transitions, 7474 flow [2024-06-04 14:55:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 14:55:28,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-04 14:55:28,572 INFO L175 Difference]: Start difference. First operand has 285 places, 420 transitions, 5842 flow. Second operand 9 states and 154 transitions. [2024-06-04 14:55:28,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 462 transitions, 7474 flow [2024-06-04 14:55:29,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 462 transitions, 7166 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:29,718 INFO L231 Difference]: Finished difference. Result has 290 places, 429 transitions, 5948 flow [2024-06-04 14:55:29,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5948, PETRI_PLACES=290, PETRI_TRANSITIONS=429} [2024-06-04 14:55:29,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-04 14:55:29,719 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 429 transitions, 5948 flow [2024-06-04 14:55:29,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:29,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:29,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:29,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:55:29,720 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:29,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash 476218938, now seen corresponding path program 4 times [2024-06-04 14:55:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:29,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900476809] [2024-06-04 14:55:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:29,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:30,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:30,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900476809] [2024-06-04 14:55:30,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900476809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:30,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:30,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042338777] [2024-06-04 14:55:30,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:30,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:30,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:30,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:30,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:30,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 429 transitions, 5948 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:30,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:30,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:30,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:31,995 INFO L124 PetriNetUnfolderBase]: 3674/5487 cut-off events. [2024-06-04 14:55:31,996 INFO L125 PetriNetUnfolderBase]: For 716031/716033 co-relation queries the response was YES. [2024-06-04 14:55:32,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50394 conditions, 5487 events. 3674/5487 cut-off events. For 716031/716033 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 28716 event pairs, 859 based on Foata normal form. 6/5493 useless extension candidates. Maximal degree in co-relation 50254. Up to 5305 conditions per place. [2024-06-04 14:55:32,073 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 60 changer transitions 0/451 dead transitions. [2024-06-04 14:55:32,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 451 transitions, 6939 flow [2024-06-04 14:55:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 14:55:32,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 14:55:32,074 INFO L175 Difference]: Start difference. First operand has 290 places, 429 transitions, 5948 flow. Second operand 9 states and 147 transitions. [2024-06-04 14:55:32,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 451 transitions, 6939 flow [2024-06-04 14:55:33,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 451 transitions, 6762 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 14:55:33,066 INFO L231 Difference]: Finished difference. Result has 295 places, 432 transitions, 5952 flow [2024-06-04 14:55:33,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5952, PETRI_PLACES=295, PETRI_TRANSITIONS=432} [2024-06-04 14:55:33,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-04 14:55:33,067 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 432 transitions, 5952 flow [2024-06-04 14:55:33,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:33,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:33,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:55:33,067 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)] === [2024-06-04 14:55:33,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1264556684, now seen corresponding path program 4 times [2024-06-04 14:55:33,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:33,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556138972] [2024-06-04 14:55:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:33,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:33,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:33,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556138972] [2024-06-04 14:55:33,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556138972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:33,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:33,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:33,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482522134] [2024-06-04 14:55:33,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:33,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:33,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:33,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:33,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:33,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 432 transitions, 5952 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:33,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:33,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:33,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:35,008 INFO L124 PetriNetUnfolderBase]: 3684/5500 cut-off events. [2024-06-04 14:55:35,008 INFO L125 PetriNetUnfolderBase]: For 728419/728419 co-relation queries the response was YES. [2024-06-04 14:55:35,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50615 conditions, 5500 events. 3684/5500 cut-off events. For 728419/728419 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28807 event pairs, 840 based on Foata normal form. 2/5502 useless extension candidates. Maximal degree in co-relation 50474. Up to 5416 conditions per place. [2024-06-04 14:55:35,085 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 433 selfloop transitions, 22 changer transitions 0/458 dead transitions. [2024-06-04 14:55:35,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 458 transitions, 6990 flow [2024-06-04 14:55:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:55:35,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-04 14:55:35,087 INFO L175 Difference]: Start difference. First operand has 295 places, 432 transitions, 5952 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:55:35,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 458 transitions, 6990 flow [2024-06-04 14:55:36,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 458 transitions, 6848 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:36,183 INFO L231 Difference]: Finished difference. Result has 297 places, 435 transitions, 5926 flow [2024-06-04 14:55:36,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5810, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5926, PETRI_PLACES=297, PETRI_TRANSITIONS=435} [2024-06-04 14:55:36,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-04 14:55:36,184 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 435 transitions, 5926 flow [2024-06-04 14:55:36,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:36,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:36,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:36,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:55:36,185 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)] === [2024-06-04 14:55:36,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash 485438942, now seen corresponding path program 5 times [2024-06-04 14:55:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:36,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214188937] [2024-06-04 14:55:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:36,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:36,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:36,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214188937] [2024-06-04 14:55:36,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214188937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:36,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:36,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443307887] [2024-06-04 14:55:36,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:36,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:36,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:36,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 435 transitions, 5926 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:36,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:36,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:37,996 INFO L124 PetriNetUnfolderBase]: 3694/5514 cut-off events. [2024-06-04 14:55:37,996 INFO L125 PetriNetUnfolderBase]: For 747080/747080 co-relation queries the response was YES. [2024-06-04 14:55:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50930 conditions, 5514 events. 3694/5514 cut-off events. For 747080/747080 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28897 event pairs, 840 based on Foata normal form. 2/5516 useless extension candidates. Maximal degree in co-relation 50788. Up to 5369 conditions per place. [2024-06-04 14:55:38,074 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 48 changer transitions 0/466 dead transitions. [2024-06-04 14:55:38,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 466 transitions, 7426 flow [2024-06-04 14:55:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:55:38,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:55:38,075 INFO L175 Difference]: Start difference. First operand has 297 places, 435 transitions, 5926 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:55:38,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 466 transitions, 7426 flow [2024-06-04 14:55:39,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 466 transitions, 7338 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:39,181 INFO L231 Difference]: Finished difference. Result has 300 places, 444 transitions, 6170 flow [2024-06-04 14:55:39,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5838, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6170, PETRI_PLACES=300, PETRI_TRANSITIONS=444} [2024-06-04 14:55:39,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-04 14:55:39,182 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 444 transitions, 6170 flow [2024-06-04 14:55:39,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:39,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:39,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:39,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:55:39,183 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)] === [2024-06-04 14:55:39,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:39,184 INFO L85 PathProgramCache]: Analyzing trace with hash 36113362, now seen corresponding path program 6 times [2024-06-04 14:55:39,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:39,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120998875] [2024-06-04 14:55:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:39,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:39,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:39,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120998875] [2024-06-04 14:55:39,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120998875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:39,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:39,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:39,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62665474] [2024-06-04 14:55:39,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:39,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:39,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:39,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:39,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:39,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:39,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 444 transitions, 6170 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:39,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:39,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:39,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:41,234 INFO L124 PetriNetUnfolderBase]: 3704/5528 cut-off events. [2024-06-04 14:55:41,234 INFO L125 PetriNetUnfolderBase]: For 766887/766887 co-relation queries the response was YES. [2024-06-04 14:55:41,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51491 conditions, 5528 events. 3704/5528 cut-off events. For 766887/766887 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28964 event pairs, 842 based on Foata normal form. 2/5530 useless extension candidates. Maximal degree in co-relation 51347. Up to 5459 conditions per place. [2024-06-04 14:55:41,311 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 23 changer transitions 0/472 dead transitions. [2024-06-04 14:55:41,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 472 transitions, 7416 flow [2024-06-04 14:55:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 14:55:41,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:55:41,312 INFO L175 Difference]: Start difference. First operand has 300 places, 444 transitions, 6170 flow. Second operand 9 states and 144 transitions. [2024-06-04 14:55:41,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 472 transitions, 7416 flow [2024-06-04 14:55:42,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 472 transitions, 7279 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-04 14:55:42,468 INFO L231 Difference]: Finished difference. Result has 308 places, 448 transitions, 6189 flow [2024-06-04 14:55:42,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6042, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6189, PETRI_PLACES=308, PETRI_TRANSITIONS=448} [2024-06-04 14:55:42,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-04 14:55:42,469 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 448 transitions, 6189 flow [2024-06-04 14:55:42,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:42,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:42,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:55:42,469 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)] === [2024-06-04 14:55:42,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2035880018, now seen corresponding path program 7 times [2024-06-04 14:55:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193266188] [2024-06-04 14:55:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:43,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193266188] [2024-06-04 14:55:43,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193266188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:43,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:43,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:43,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769498731] [2024-06-04 14:55:43,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:43,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:43,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:43,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:43,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 448 transitions, 6189 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:43,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:43,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:43,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:44,412 INFO L124 PetriNetUnfolderBase]: 3698/5520 cut-off events. [2024-06-04 14:55:44,412 INFO L125 PetriNetUnfolderBase]: For 777152/777152 co-relation queries the response was YES. [2024-06-04 14:55:44,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51423 conditions, 5520 events. 3698/5520 cut-off events. For 777152/777152 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28931 event pairs, 849 based on Foata normal form. 2/5522 useless extension candidates. Maximal degree in co-relation 51276. Up to 5480 conditions per place. [2024-06-04 14:55:44,488 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 17 changer transitions 0/466 dead transitions. [2024-06-04 14:55:44,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 466 transitions, 7163 flow [2024-06-04 14:55:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 14:55:44,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 14:55:44,491 INFO L175 Difference]: Start difference. First operand has 308 places, 448 transitions, 6189 flow. Second operand 8 states and 126 transitions. [2024-06-04 14:55:44,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 466 transitions, 7163 flow [2024-06-04 14:55:45,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 466 transitions, 7067 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:45,742 INFO L231 Difference]: Finished difference. Result has 311 places, 448 transitions, 6133 flow [2024-06-04 14:55:45,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6093, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6133, PETRI_PLACES=311, PETRI_TRANSITIONS=448} [2024-06-04 14:55:45,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-04 14:55:45,756 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 448 transitions, 6133 flow [2024-06-04 14:55:45,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:45,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:45,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:45,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:55:45,757 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:45,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash -191667632, now seen corresponding path program 4 times [2024-06-04 14:55:45,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:45,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419264964] [2024-06-04 14:55:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:45,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:46,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419264964] [2024-06-04 14:55:46,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419264964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:46,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803648773] [2024-06-04 14:55:46,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:46,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:46,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 448 transitions, 6133 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:46,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:46,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:46,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:47,715 INFO L124 PetriNetUnfolderBase]: 3681/5496 cut-off events. [2024-06-04 14:55:47,715 INFO L125 PetriNetUnfolderBase]: For 789040/789040 co-relation queries the response was YES. [2024-06-04 14:55:47,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51133 conditions, 5496 events. 3681/5496 cut-off events. For 789040/789040 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28798 event pairs, 837 based on Foata normal form. 3/5499 useless extension candidates. Maximal degree in co-relation 50985. Up to 5392 conditions per place. [2024-06-04 14:55:47,793 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 422 selfloop transitions, 45 changer transitions 0/470 dead transitions. [2024-06-04 14:55:47,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 470 transitions, 7296 flow [2024-06-04 14:55:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:55:47,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:55:47,794 INFO L175 Difference]: Start difference. First operand has 311 places, 448 transitions, 6133 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:55:47,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 470 transitions, 7296 flow [2024-06-04 14:55:48,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 470 transitions, 7224 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:48,935 INFO L231 Difference]: Finished difference. Result has 312 places, 448 transitions, 6161 flow [2024-06-04 14:55:48,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6063, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6161, PETRI_PLACES=312, PETRI_TRANSITIONS=448} [2024-06-04 14:55:48,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 14:55:48,936 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 448 transitions, 6161 flow [2024-06-04 14:55:48,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:48,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:48,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:48,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:55:48,936 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:55:48,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash -960022490, now seen corresponding path program 5 times [2024-06-04 14:55:48,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:48,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895300312] [2024-06-04 14:55:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:48,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:49,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:49,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895300312] [2024-06-04 14:55:49,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895300312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:49,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:49,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259689079] [2024-06-04 14:55:49,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:49,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:49,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:49,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 448 transitions, 6161 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:49,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:49,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:49,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:51,199 INFO L124 PetriNetUnfolderBase]: 3696/5517 cut-off events. [2024-06-04 14:55:51,199 INFO L125 PetriNetUnfolderBase]: For 807702/807702 co-relation queries the response was YES. [2024-06-04 14:55:51,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51566 conditions, 5517 events. 3696/5517 cut-off events. For 807702/807702 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28891 event pairs, 847 based on Foata normal form. 3/5520 useless extension candidates. Maximal degree in co-relation 51417. Up to 5465 conditions per place. [2024-06-04 14:55:51,297 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 29 changer transitions 0/469 dead transitions. [2024-06-04 14:55:51,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 469 transitions, 7226 flow [2024-06-04 14:55:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:55:51,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:55:51,298 INFO L175 Difference]: Start difference. First operand has 312 places, 448 transitions, 6161 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:55:51,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 469 transitions, 7226 flow [2024-06-04 14:55:52,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 469 transitions, 6690 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-04 14:55:52,498 INFO L231 Difference]: Finished difference. Result has 308 places, 453 transitions, 5786 flow [2024-06-04 14:55:52,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5786, PETRI_PLACES=308, PETRI_TRANSITIONS=453} [2024-06-04 14:55:52,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-04 14:55:52,499 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 453 transitions, 5786 flow [2024-06-04 14:55:52,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:52,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:52,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:52,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:55:52,499 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)] === [2024-06-04 14:55:52,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash 162832372, now seen corresponding path program 8 times [2024-06-04 14:55:52,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:52,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541363074] [2024-06-04 14:55:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:52,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:53,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:53,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541363074] [2024-06-04 14:55:53,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541363074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:53,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:53,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:53,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527195758] [2024-06-04 14:55:53,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:53,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:53,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 453 transitions, 5786 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:53,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:53,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:53,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:54,586 INFO L124 PetriNetUnfolderBase]: 3706/5531 cut-off events. [2024-06-04 14:55:54,586 INFO L125 PetriNetUnfolderBase]: For 817215/817215 co-relation queries the response was YES. [2024-06-04 14:55:54,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51390 conditions, 5531 events. 3706/5531 cut-off events. For 817215/817215 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28934 event pairs, 857 based on Foata normal form. 2/5533 useless extension candidates. Maximal degree in co-relation 51242. Up to 5476 conditions per place. [2024-06-04 14:55:54,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 29 changer transitions 0/472 dead transitions. [2024-06-04 14:55:54,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 472 transitions, 6847 flow [2024-06-04 14:55:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:55:54,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:55:54,657 INFO L175 Difference]: Start difference. First operand has 308 places, 453 transitions, 5786 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:55:54,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 472 transitions, 6847 flow [2024-06-04 14:55:55,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 472 transitions, 6782 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:55,976 INFO L231 Difference]: Finished difference. Result has 311 places, 457 transitions, 5874 flow [2024-06-04 14:55:55,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5874, PETRI_PLACES=311, PETRI_TRANSITIONS=457} [2024-06-04 14:55:55,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-04 14:55:55,977 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 457 transitions, 5874 flow [2024-06-04 14:55:55,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:55,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:55,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:55,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:55:55,982 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)] === [2024-06-04 14:55:55,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash -960438200, now seen corresponding path program 6 times [2024-06-04 14:55:55,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:55,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062440930] [2024-06-04 14:55:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:55,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:56,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:56,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062440930] [2024-06-04 14:55:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062440930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:56,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88850126] [2024-06-04 14:55:56,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:56,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:56,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 457 transitions, 5874 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:56,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:56,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:56,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:58,026 INFO L124 PetriNetUnfolderBase]: 3721/5552 cut-off events. [2024-06-04 14:55:58,027 INFO L125 PetriNetUnfolderBase]: For 840030/840030 co-relation queries the response was YES. [2024-06-04 14:55:58,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51758 conditions, 5552 events. 3721/5552 cut-off events. For 840030/840030 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29128 event pairs, 846 based on Foata normal form. 3/5555 useless extension candidates. Maximal degree in co-relation 51609. Up to 5488 conditions per place. [2024-06-04 14:55:58,114 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 441 selfloop transitions, 35 changer transitions 0/479 dead transitions. [2024-06-04 14:55:58,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 479 transitions, 6943 flow [2024-06-04 14:55:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 14:55:58,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:55:58,115 INFO L175 Difference]: Start difference. First operand has 311 places, 457 transitions, 5874 flow. Second operand 8 states and 132 transitions. [2024-06-04 14:55:58,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 479 transitions, 6943 flow [2024-06-04 14:55:59,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 479 transitions, 6823 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:59,647 INFO L231 Difference]: Finished difference. Result has 313 places, 461 transitions, 5900 flow [2024-06-04 14:55:59,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5754, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5900, PETRI_PLACES=313, PETRI_TRANSITIONS=461} [2024-06-04 14:55:59,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 14:55:59,648 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 461 transitions, 5900 flow [2024-06-04 14:55:59,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:59,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:59,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:59,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:55:59,648 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)] === [2024-06-04 14:55:59,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash -960438386, now seen corresponding path program 9 times [2024-06-04 14:55:59,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:59,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160153021] [2024-06-04 14:55:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:59,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:00,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:00,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160153021] [2024-06-04 14:56:00,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160153021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:00,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:00,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:00,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768168122] [2024-06-04 14:56:00,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:00,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:00,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:00,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:00,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 461 transitions, 5900 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:00,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:00,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:00,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:01,593 INFO L124 PetriNetUnfolderBase]: 3731/5566 cut-off events. [2024-06-04 14:56:01,593 INFO L125 PetriNetUnfolderBase]: For 855835/855835 co-relation queries the response was YES. [2024-06-04 14:56:01,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52095 conditions, 5566 events. 3731/5566 cut-off events. For 855835/855835 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29172 event pairs, 851 based on Foata normal form. 2/5568 useless extension candidates. Maximal degree in co-relation 51946. Up to 5496 conditions per place. [2024-06-04 14:56:01,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 37 changer transitions 0/480 dead transitions. [2024-06-04 14:56:01,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 480 transitions, 6979 flow [2024-06-04 14:56:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 14:56:01,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 14:56:01,691 INFO L175 Difference]: Start difference. First operand has 313 places, 461 transitions, 5900 flow. Second operand 8 states and 129 transitions. [2024-06-04 14:56:01,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 480 transitions, 6979 flow [2024-06-04 14:56:03,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 480 transitions, 6900 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:03,284 INFO L231 Difference]: Finished difference. Result has 315 places, 464 transitions, 5986 flow [2024-06-04 14:56:03,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5986, PETRI_PLACES=315, PETRI_TRANSITIONS=464} [2024-06-04 14:56:03,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-04 14:56:03,285 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 464 transitions, 5986 flow [2024-06-04 14:56:03,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:03,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:03,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:03,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:56:03,285 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)] === [2024-06-04 14:56:03,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1726208318, now seen corresponding path program 7 times [2024-06-04 14:56:03,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:03,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629427586] [2024-06-04 14:56:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:03,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629427586] [2024-06-04 14:56:03,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629427586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:03,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:03,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:03,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427757312] [2024-06-04 14:56:03,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:03,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:03,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:04,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:04,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 464 transitions, 5986 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:04,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:04,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:04,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:05,396 INFO L124 PetriNetUnfolderBase]: 3746/5588 cut-off events. [2024-06-04 14:56:05,396 INFO L125 PetriNetUnfolderBase]: For 879298/879300 co-relation queries the response was YES. [2024-06-04 14:56:05,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52480 conditions, 5588 events. 3746/5588 cut-off events. For 879298/879300 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29323 event pairs, 856 based on Foata normal form. 5/5593 useless extension candidates. Maximal degree in co-relation 52330. Up to 5535 conditions per place. [2024-06-04 14:56:05,463 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 30 changer transitions 0/482 dead transitions. [2024-06-04 14:56:05,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 482 transitions, 7057 flow [2024-06-04 14:56:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 14:56:05,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 14:56:05,464 INFO L175 Difference]: Start difference. First operand has 315 places, 464 transitions, 5986 flow. Second operand 8 states and 125 transitions. [2024-06-04 14:56:05,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 482 transitions, 7057 flow [2024-06-04 14:56:06,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 482 transitions, 6929 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:06,857 INFO L231 Difference]: Finished difference. Result has 317 places, 469 transitions, 6009 flow [2024-06-04 14:56:06,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6009, PETRI_PLACES=317, PETRI_TRANSITIONS=469} [2024-06-04 14:56:06,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-04 14:56:06,857 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 469 transitions, 6009 flow [2024-06-04 14:56:06,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:06,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:06,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:56:06,858 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)] === [2024-06-04 14:56:06,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash 742100250, now seen corresponding path program 10 times [2024-06-04 14:56:06,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:06,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721554742] [2024-06-04 14:56:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:06,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:07,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:07,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721554742] [2024-06-04 14:56:07,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721554742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:07,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494306358] [2024-06-04 14:56:07,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:07,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:07,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:07,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:07,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 469 transitions, 6009 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:07,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:07,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:07,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:08,873 INFO L124 PetriNetUnfolderBase]: 3756/5603 cut-off events. [2024-06-04 14:56:08,873 INFO L125 PetriNetUnfolderBase]: For 895339/895341 co-relation queries the response was YES. [2024-06-04 14:56:08,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52786 conditions, 5603 events. 3756/5603 cut-off events. For 895339/895341 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29367 event pairs, 860 based on Foata normal form. 4/5607 useless extension candidates. Maximal degree in co-relation 52635. Up to 5546 conditions per place. [2024-06-04 14:56:08,962 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 452 selfloop transitions, 29 changer transitions 0/484 dead transitions. [2024-06-04 14:56:08,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 484 transitions, 7088 flow [2024-06-04 14:56:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:56:08,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:56:08,963 INFO L175 Difference]: Start difference. First operand has 317 places, 469 transitions, 6009 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:56:08,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 484 transitions, 7088 flow [2024-06-04 14:56:10,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 484 transitions, 7011 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:10,293 INFO L231 Difference]: Finished difference. Result has 320 places, 472 transitions, 6087 flow [2024-06-04 14:56:10,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5932, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6087, PETRI_PLACES=320, PETRI_TRANSITIONS=472} [2024-06-04 14:56:10,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-04 14:56:10,294 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 472 transitions, 6087 flow [2024-06-04 14:56:10,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:10,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:10,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:10,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:56:10,295 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)] === [2024-06-04 14:56:10,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash -148260138, now seen corresponding path program 8 times [2024-06-04 14:56:10,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:10,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337242699] [2024-06-04 14:56:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:10,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:11,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:11,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337242699] [2024-06-04 14:56:11,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337242699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:11,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:11,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449061153] [2024-06-04 14:56:11,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:11,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:11,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:11,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:11,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 472 transitions, 6087 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:11,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:11,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:11,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:12,418 INFO L124 PetriNetUnfolderBase]: 3747/5590 cut-off events. [2024-06-04 14:56:12,418 INFO L125 PetriNetUnfolderBase]: For 907077/907079 co-relation queries the response was YES. [2024-06-04 14:56:12,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52641 conditions, 5590 events. 3747/5590 cut-off events. For 907077/907079 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29307 event pairs, 854 based on Foata normal form. 5/5595 useless extension candidates. Maximal degree in co-relation 52489. Up to 5511 conditions per place. [2024-06-04 14:56:12,499 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 445 selfloop transitions, 40 changer transitions 0/488 dead transitions. [2024-06-04 14:56:12,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 488 transitions, 7283 flow [2024-06-04 14:56:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 14:56:12,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 14:56:12,501 INFO L175 Difference]: Start difference. First operand has 320 places, 472 transitions, 6087 flow. Second operand 8 states and 129 transitions. [2024-06-04 14:56:12,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 488 transitions, 7283 flow [2024-06-04 14:56:14,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 488 transitions, 7153 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:14,063 INFO L231 Difference]: Finished difference. Result has 322 places, 472 transitions, 6044 flow [2024-06-04 14:56:14,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6044, PETRI_PLACES=322, PETRI_TRANSITIONS=472} [2024-06-04 14:56:14,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-04 14:56:14,064 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 472 transitions, 6044 flow [2024-06-04 14:56:14,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:14,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:14,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:14,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:56:14,066 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)] === [2024-06-04 14:56:14,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1184388852, now seen corresponding path program 9 times [2024-06-04 14:56:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:14,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708315272] [2024-06-04 14:56:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:14,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:14,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708315272] [2024-06-04 14:56:14,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708315272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:14,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:14,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:14,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55502548] [2024-06-04 14:56:14,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:14,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:14,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:14,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:14,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:14,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:14,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 472 transitions, 6044 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:14,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:14,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:14,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:15,989 INFO L124 PetriNetUnfolderBase]: 3738/5578 cut-off events. [2024-06-04 14:56:15,990 INFO L125 PetriNetUnfolderBase]: For 914032/914034 co-relation queries the response was YES. [2024-06-04 14:56:16,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52437 conditions, 5578 events. 3738/5578 cut-off events. For 914032/914034 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29239 event pairs, 854 based on Foata normal form. 5/5583 useless extension candidates. Maximal degree in co-relation 52284. Up to 5525 conditions per place. [2024-06-04 14:56:16,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 31 changer transitions 0/485 dead transitions. [2024-06-04 14:56:16,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 485 transitions, 7045 flow [2024-06-04 14:56:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:56:16,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:56:16,085 INFO L175 Difference]: Start difference. First operand has 322 places, 472 transitions, 6044 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:56:16,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 485 transitions, 7045 flow [2024-06-04 14:56:17,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 485 transitions, 6909 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:17,690 INFO L231 Difference]: Finished difference. Result has 324 places, 472 transitions, 5977 flow [2024-06-04 14:56:17,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5908, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5977, PETRI_PLACES=324, PETRI_TRANSITIONS=472} [2024-06-04 14:56:17,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-04 14:56:17,690 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 472 transitions, 5977 flow [2024-06-04 14:56:17,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:17,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:17,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:17,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:56:17,691 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)] === [2024-06-04 14:56:17,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash -148260324, now seen corresponding path program 11 times [2024-06-04 14:56:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839233139] [2024-06-04 14:56:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:17,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:18,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839233139] [2024-06-04 14:56:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839233139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:18,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:18,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837224052] [2024-06-04 14:56:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:18,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:18,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 472 transitions, 5977 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:18,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:18,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:18,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:19,667 INFO L124 PetriNetUnfolderBase]: 3732/5571 cut-off events. [2024-06-04 14:56:19,667 INFO L125 PetriNetUnfolderBase]: For 920489/920491 co-relation queries the response was YES. [2024-06-04 14:56:19,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52270 conditions, 5571 events. 3732/5571 cut-off events. For 920489/920491 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29250 event pairs, 857 based on Foata normal form. 4/5575 useless extension candidates. Maximal degree in co-relation 52116. Up to 5505 conditions per place. [2024-06-04 14:56:19,753 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 34 changer transitions 0/485 dead transitions. [2024-06-04 14:56:19,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 485 transitions, 6979 flow [2024-06-04 14:56:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:56:19,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:56:19,755 INFO L175 Difference]: Start difference. First operand has 324 places, 472 transitions, 5977 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:56:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 485 transitions, 6979 flow [2024-06-04 14:56:21,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 485 transitions, 6850 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:21,340 INFO L231 Difference]: Finished difference. Result has 324 places, 472 transitions, 5922 flow [2024-06-04 14:56:21,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5922, PETRI_PLACES=324, PETRI_TRANSITIONS=472} [2024-06-04 14:56:21,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-04 14:56:21,341 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 472 transitions, 5922 flow [2024-06-04 14:56:21,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:21,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:21,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:21,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:56:21,341 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)] === [2024-06-04 14:56:21,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:21,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1190102772, now seen corresponding path program 10 times [2024-06-04 14:56:21,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:21,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982407947] [2024-06-04 14:56:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:21,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:22,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:22,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982407947] [2024-06-04 14:56:22,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982407947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:22,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:22,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:22,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780217721] [2024-06-04 14:56:22,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:22,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:22,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:22,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:22,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:22,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:22,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 472 transitions, 5922 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:22,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:22,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:22,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:23,539 INFO L124 PetriNetUnfolderBase]: 3708/5537 cut-off events. [2024-06-04 14:56:23,540 INFO L125 PetriNetUnfolderBase]: For 930653/930655 co-relation queries the response was YES. [2024-06-04 14:56:23,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51685 conditions, 5537 events. 3708/5537 cut-off events. For 930653/930655 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29078 event pairs, 837 based on Foata normal form. 8/5545 useless extension candidates. Maximal degree in co-relation 51530. Up to 5387 conditions per place. [2024-06-04 14:56:23,627 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 49 changer transitions 0/487 dead transitions. [2024-06-04 14:56:23,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 487 transitions, 6938 flow [2024-06-04 14:56:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 14:56:23,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 14:56:23,629 INFO L175 Difference]: Start difference. First operand has 324 places, 472 transitions, 5922 flow. Second operand 8 states and 129 transitions. [2024-06-04 14:56:23,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 487 transitions, 6938 flow [2024-06-04 14:56:25,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 487 transitions, 6778 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:25,385 INFO L231 Difference]: Finished difference. Result has 324 places, 472 transitions, 5870 flow [2024-06-04 14:56:25,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5762, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5870, PETRI_PLACES=324, PETRI_TRANSITIONS=472} [2024-06-04 14:56:25,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-04 14:56:25,386 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 472 transitions, 5870 flow [2024-06-04 14:56:25,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:25,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:25,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:56:25,387 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)] === [2024-06-04 14:56:25,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1419134988, now seen corresponding path program 12 times [2024-06-04 14:56:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:25,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658135777] [2024-06-04 14:56:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:25,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:26,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:26,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658135777] [2024-06-04 14:56:26,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658135777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:26,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:26,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:26,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015618989] [2024-06-04 14:56:26,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:26,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:26,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:26,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:26,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 472 transitions, 5870 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:26,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:26,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:26,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:27,596 INFO L124 PetriNetUnfolderBase]: 3696/5522 cut-off events. [2024-06-04 14:56:27,597 INFO L125 PetriNetUnfolderBase]: For 924575/924577 co-relation queries the response was YES. [2024-06-04 14:56:27,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51343 conditions, 5522 events. 3696/5522 cut-off events. For 924575/924577 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29001 event pairs, 851 based on Foata normal form. 6/5528 useless extension candidates. Maximal degree in co-relation 51188. Up to 5371 conditions per place. [2024-06-04 14:56:27,665 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 431 selfloop transitions, 52 changer transitions 0/486 dead transitions. [2024-06-04 14:56:27,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 486 transitions, 7060 flow [2024-06-04 14:56:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:56:27,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-04 14:56:27,667 INFO L175 Difference]: Start difference. First operand has 324 places, 472 transitions, 5870 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:56:27,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 486 transitions, 7060 flow [2024-06-04 14:56:29,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 486 transitions, 6915 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:29,558 INFO L231 Difference]: Finished difference. Result has 325 places, 472 transitions, 5836 flow [2024-06-04 14:56:29,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5725, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5836, PETRI_PLACES=325, PETRI_TRANSITIONS=472} [2024-06-04 14:56:29,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-04 14:56:29,559 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 472 transitions, 5836 flow [2024-06-04 14:56:29,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:29,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:29,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:29,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:56:29,560 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)] === [2024-06-04 14:56:29,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1589837232, now seen corresponding path program 11 times [2024-06-04 14:56:29,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:29,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152310672] [2024-06-04 14:56:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:29,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:30,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:30,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152310672] [2024-06-04 14:56:30,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152310672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:30,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:30,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:30,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897691245] [2024-06-04 14:56:30,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:30,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:30,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:30,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:30,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 472 transitions, 5836 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:30,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:30,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:30,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:31,590 INFO L124 PetriNetUnfolderBase]: 3726/5563 cut-off events. [2024-06-04 14:56:31,590 INFO L125 PetriNetUnfolderBase]: For 952258/952260 co-relation queries the response was YES. [2024-06-04 14:56:31,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51778 conditions, 5563 events. 3726/5563 cut-off events. For 952258/952260 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29196 event pairs, 827 based on Foata normal form. 8/5571 useless extension candidates. Maximal degree in co-relation 51622. Up to 5234 conditions per place. [2024-06-04 14:56:31,683 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 88 changer transitions 0/495 dead transitions. [2024-06-04 14:56:31,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 495 transitions, 7152 flow [2024-06-04 14:56:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:56:31,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 14:56:31,684 INFO L175 Difference]: Start difference. First operand has 325 places, 472 transitions, 5836 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:56:31,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 495 transitions, 7152 flow [2024-06-04 14:56:33,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 495 transitions, 6968 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:33,719 INFO L231 Difference]: Finished difference. Result has 326 places, 478 transitions, 5929 flow [2024-06-04 14:56:33,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5652, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5929, PETRI_PLACES=326, PETRI_TRANSITIONS=478} [2024-06-04 14:56:33,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-04 14:56:33,720 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 478 transitions, 5929 flow [2024-06-04 14:56:33,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:33,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:33,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:33,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:56:33,720 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)] === [2024-06-04 14:56:33,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash -325154508, now seen corresponding path program 12 times [2024-06-04 14:56:33,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:33,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778577002] [2024-06-04 14:56:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:33,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:34,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:34,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778577002] [2024-06-04 14:56:34,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778577002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:34,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:34,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117200665] [2024-06-04 14:56:34,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:34,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:34,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:34,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:34,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:34,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:34,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 478 transitions, 5929 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:34,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:34,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:34,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:35,801 INFO L124 PetriNetUnfolderBase]: 3702/5530 cut-off events. [2024-06-04 14:56:35,801 INFO L125 PetriNetUnfolderBase]: For 945028/945030 co-relation queries the response was YES. [2024-06-04 14:56:35,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51295 conditions, 5530 events. 3702/5530 cut-off events. For 945028/945030 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29064 event pairs, 833 based on Foata normal form. 8/5538 useless extension candidates. Maximal degree in co-relation 51138. Up to 5216 conditions per place. [2024-06-04 14:56:35,884 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 406 selfloop transitions, 85 changer transitions 0/494 dead transitions. [2024-06-04 14:56:35,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 494 transitions, 6963 flow [2024-06-04 14:56:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:56:35,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 14:56:35,886 INFO L175 Difference]: Start difference. First operand has 326 places, 478 transitions, 5929 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:56:35,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 494 transitions, 6963 flow [2024-06-04 14:56:38,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 494 transitions, 6658 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:38,524 INFO L231 Difference]: Finished difference. Result has 327 places, 478 transitions, 5809 flow [2024-06-04 14:56:38,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5628, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5809, PETRI_PLACES=327, PETRI_TRANSITIONS=478} [2024-06-04 14:56:38,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-04 14:56:38,528 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 478 transitions, 5809 flow [2024-06-04 14:56:38,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:38,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:38,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:38,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:56:38,528 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)] === [2024-06-04 14:56:38,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash 74338834, now seen corresponding path program 5 times [2024-06-04 14:56:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:38,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213016374] [2024-06-04 14:56:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:39,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:39,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213016374] [2024-06-04 14:56:39,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213016374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:39,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:39,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:39,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909148260] [2024-06-04 14:56:39,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:39,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:39,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:39,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:39,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:39,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:39,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 478 transitions, 5809 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:39,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:39,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:39,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:40,889 INFO L124 PetriNetUnfolderBase]: 3732/5572 cut-off events. [2024-06-04 14:56:40,889 INFO L125 PetriNetUnfolderBase]: For 964002/964004 co-relation queries the response was YES. [2024-06-04 14:56:40,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51683 conditions, 5572 events. 3732/5572 cut-off events. For 964002/964004 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29299 event pairs, 830 based on Foata normal form. 8/5580 useless extension candidates. Maximal degree in co-relation 51525. Up to 5400 conditions per place. [2024-06-04 14:56:40,981 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 440 selfloop transitions, 57 changer transitions 0/500 dead transitions. [2024-06-04 14:56:40,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 500 transitions, 6942 flow [2024-06-04 14:56:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 14:56:40,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:56:40,991 INFO L175 Difference]: Start difference. First operand has 327 places, 478 transitions, 5809 flow. Second operand 9 states and 144 transitions. [2024-06-04 14:56:40,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 500 transitions, 6942 flow [2024-06-04 14:56:43,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 500 transitions, 6725 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:43,811 INFO L231 Difference]: Finished difference. Result has 328 places, 483 transitions, 5814 flow [2024-06-04 14:56:43,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5814, PETRI_PLACES=328, PETRI_TRANSITIONS=483} [2024-06-04 14:56:43,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-04 14:56:43,812 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 483 transitions, 5814 flow [2024-06-04 14:56:43,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:43,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:43,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:43,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:56:43,813 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)] === [2024-06-04 14:56:43,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1176284708, now seen corresponding path program 1 times [2024-06-04 14:56:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:43,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258712300] [2024-06-04 14:56:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:43,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:44,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:44,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258712300] [2024-06-04 14:56:44,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258712300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:44,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:44,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:44,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897835847] [2024-06-04 14:56:44,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:44,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:44,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:44,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:44,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:44,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:44,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 483 transitions, 5814 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:44,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:44,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:44,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:46,146 INFO L124 PetriNetUnfolderBase]: 3728/5585 cut-off events. [2024-06-04 14:56:46,147 INFO L125 PetriNetUnfolderBase]: For 961726/961728 co-relation queries the response was YES. [2024-06-04 14:56:46,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51360 conditions, 5585 events. 3728/5585 cut-off events. For 961726/961728 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29550 event pairs, 1391 based on Foata normal form. 8/5593 useless extension candidates. Maximal degree in co-relation 51201. Up to 5419 conditions per place. [2024-06-04 14:56:46,228 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 438 selfloop transitions, 66 changer transitions 0/507 dead transitions. [2024-06-04 14:56:46,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 507 transitions, 7242 flow [2024-06-04 14:56:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:56:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:56:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-04 14:56:46,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-04 14:56:46,231 INFO L175 Difference]: Start difference. First operand has 328 places, 483 transitions, 5814 flow. Second operand 10 states and 151 transitions. [2024-06-04 14:56:46,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 507 transitions, 7242 flow [2024-06-04 14:56:48,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 507 transitions, 7045 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:48,156 INFO L231 Difference]: Finished difference. Result has 333 places, 493 transitions, 5992 flow [2024-06-04 14:56:48,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5992, PETRI_PLACES=333, PETRI_TRANSITIONS=493} [2024-06-04 14:56:48,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-04 14:56:48,157 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 493 transitions, 5992 flow [2024-06-04 14:56:48,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:48,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:48,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:48,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:56:48,158 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)] === [2024-06-04 14:56:48,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:48,158 INFO L85 PathProgramCache]: Analyzing trace with hash -325158476, now seen corresponding path program 6 times [2024-06-04 14:56:48,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:48,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967523126] [2024-06-04 14:56:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:48,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:48,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967523126] [2024-06-04 14:56:48,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967523126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:48,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:48,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:48,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377642961] [2024-06-04 14:56:48,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:48,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:48,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:48,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:49,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:49,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 493 transitions, 5992 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:49,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:49,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:49,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:50,301 INFO L124 PetriNetUnfolderBase]: 3738/5599 cut-off events. [2024-06-04 14:56:50,301 INFO L125 PetriNetUnfolderBase]: For 968123/968125 co-relation queries the response was YES. [2024-06-04 14:56:50,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51938 conditions, 5599 events. 3738/5599 cut-off events. For 968123/968125 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29668 event pairs, 1362 based on Foata normal form. 4/5603 useless extension candidates. Maximal degree in co-relation 51776. Up to 5436 conditions per place. [2024-06-04 14:56:50,391 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 457 selfloop transitions, 65 changer transitions 0/525 dead transitions. [2024-06-04 14:56:50,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 525 transitions, 7302 flow [2024-06-04 14:56:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-04 14:56:50,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-04 14:56:50,392 INFO L175 Difference]: Start difference. First operand has 333 places, 493 transitions, 5992 flow. Second operand 9 states and 141 transitions. [2024-06-04 14:56:50,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 525 transitions, 7302 flow [2024-06-04 14:56:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 525 transitions, 6853 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:52,212 INFO L231 Difference]: Finished difference. Result has 339 places, 505 transitions, 5891 flow [2024-06-04 14:56:52,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5891, PETRI_PLACES=339, PETRI_TRANSITIONS=505} [2024-06-04 14:56:52,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-04 14:56:52,213 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 505 transitions, 5891 flow [2024-06-04 14:56:52,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:52,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:52,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:52,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:56:52,214 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)] === [2024-06-04 14:56:52,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash 737339518, now seen corresponding path program 7 times [2024-06-04 14:56:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:52,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632095160] [2024-06-04 14:56:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:53,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:53,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632095160] [2024-06-04 14:56:53,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632095160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:53,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:53,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:53,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833494423] [2024-06-04 14:56:53,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:53,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:53,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:53,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:53,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 505 transitions, 5891 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:53,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:53,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:53,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:54,545 INFO L124 PetriNetUnfolderBase]: 3768/5641 cut-off events. [2024-06-04 14:56:54,545 INFO L125 PetriNetUnfolderBase]: For 1007181/1007183 co-relation queries the response was YES. [2024-06-04 14:56:54,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51690 conditions, 5641 events. 3768/5641 cut-off events. For 1007181/1007183 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 29908 event pairs, 1372 based on Foata normal form. 8/5649 useless extension candidates. Maximal degree in co-relation 51525. Up to 5288 conditions per place. [2024-06-04 14:56:54,629 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 417 selfloop transitions, 107 changer transitions 0/527 dead transitions. [2024-06-04 14:56:54,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 527 transitions, 7103 flow [2024-06-04 14:56:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 14:56:54,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-04 14:56:54,630 INFO L175 Difference]: Start difference. First operand has 339 places, 505 transitions, 5891 flow. Second operand 9 states and 149 transitions. [2024-06-04 14:56:54,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 527 transitions, 7103 flow [2024-06-04 14:56:56,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 527 transitions, 6897 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:56,639 INFO L231 Difference]: Finished difference. Result has 342 places, 510 transitions, 6029 flow [2024-06-04 14:56:56,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6029, PETRI_PLACES=342, PETRI_TRANSITIONS=510} [2024-06-04 14:56:56,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-04 14:56:56,640 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 510 transitions, 6029 flow [2024-06-04 14:56:56,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:56,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:56,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:56,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:56:56,641 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)] === [2024-06-04 14:56:56,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash -325514976, now seen corresponding path program 5 times [2024-06-04 14:56:56,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:56,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268434582] [2024-06-04 14:56:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:56,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:57,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:57,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268434582] [2024-06-04 14:56:57,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268434582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:57,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:57,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:57,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463734882] [2024-06-04 14:56:57,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:57,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:57,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:57,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:57,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:57,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:57,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 510 transitions, 6029 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:57,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:57,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:57,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:59,004 INFO L124 PetriNetUnfolderBase]: 3758/5627 cut-off events. [2024-06-04 14:56:59,004 INFO L125 PetriNetUnfolderBase]: For 997638/997640 co-relation queries the response was YES. [2024-06-04 14:56:59,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51430 conditions, 5627 events. 3758/5627 cut-off events. For 997638/997640 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 29778 event pairs, 1390 based on Foata normal form. 6/5633 useless extension candidates. Maximal degree in co-relation 51265. Up to 5535 conditions per place. [2024-06-04 14:56:59,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 39 changer transitions 0/523 dead transitions. [2024-06-04 14:56:59,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 523 transitions, 7108 flow [2024-06-04 14:56:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-04 14:56:59,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-04 14:56:59,085 INFO L175 Difference]: Start difference. First operand has 342 places, 510 transitions, 6029 flow. Second operand 9 states and 138 transitions. [2024-06-04 14:56:59,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 523 transitions, 7108 flow [2024-06-04 14:57:00,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 523 transitions, 6797 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:00,990 INFO L231 Difference]: Finished difference. Result has 344 places, 511 transitions, 5815 flow [2024-06-04 14:57:00,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5815, PETRI_PLACES=344, PETRI_TRANSITIONS=511} [2024-06-04 14:57:00,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-04 14:57:00,991 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 511 transitions, 5815 flow [2024-06-04 14:57:00,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:00,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:00,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:00,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:57:00,991 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)] === [2024-06-04 14:57:00,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash 737329288, now seen corresponding path program 8 times [2024-06-04 14:57:00,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:00,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343964505] [2024-06-04 14:57:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:00,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:01,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:01,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343964505] [2024-06-04 14:57:01,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343964505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:01,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:01,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129907560] [2024-06-04 14:57:01,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:02,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:02,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 511 transitions, 5815 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:02,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:02,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:02,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:03,266 INFO L124 PetriNetUnfolderBase]: 3752/5619 cut-off events. [2024-06-04 14:57:03,266 INFO L125 PetriNetUnfolderBase]: For 994603/994605 co-relation queries the response was YES. [2024-06-04 14:57:03,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50782 conditions, 5619 events. 3752/5619 cut-off events. For 994603/994605 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 29780 event pairs, 1368 based on Foata normal form. 4/5623 useless extension candidates. Maximal degree in co-relation 50616. Up to 5432 conditions per place. [2024-06-04 14:57:03,350 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 449 selfloop transitions, 90 changer transitions 0/542 dead transitions. [2024-06-04 14:57:03,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 542 transitions, 7133 flow [2024-06-04 14:57:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-04 14:57:03,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-04 14:57:03,351 INFO L175 Difference]: Start difference. First operand has 344 places, 511 transitions, 5815 flow. Second operand 9 states and 142 transitions. [2024-06-04 14:57:03,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 542 transitions, 7133 flow [2024-06-04 14:57:05,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 542 transitions, 7039 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:05,147 INFO L231 Difference]: Finished difference. Result has 349 places, 529 transitions, 6231 flow [2024-06-04 14:57:05,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6231, PETRI_PLACES=349, PETRI_TRANSITIONS=529} [2024-06-04 14:57:05,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-04 14:57:05,148 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 529 transitions, 6231 flow [2024-06-04 14:57:05,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:05,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:05,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:05,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:57:05,148 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)] === [2024-06-04 14:57:05,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1028075726, now seen corresponding path program 1 times [2024-06-04 14:57:05,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:05,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592143769] [2024-06-04 14:57:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:05,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:06,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592143769] [2024-06-04 14:57:06,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592143769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:06,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:06,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:06,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568258013] [2024-06-04 14:57:06,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:06,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:06,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:06,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:06,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 529 transitions, 6231 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:06,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:06,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:06,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:07,719 INFO L124 PetriNetUnfolderBase]: 3773/5649 cut-off events. [2024-06-04 14:57:07,719 INFO L125 PetriNetUnfolderBase]: For 1025385/1025385 co-relation queries the response was YES. [2024-06-04 14:57:07,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51835 conditions, 5649 events. 3773/5649 cut-off events. For 1025385/1025385 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29929 event pairs, 1329 based on Foata normal form. 2/5651 useless extension candidates. Maximal degree in co-relation 51665. Up to 5549 conditions per place. [2024-06-04 14:57:07,815 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 528 selfloop transitions, 25 changer transitions 0/556 dead transitions. [2024-06-04 14:57:07,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 556 transitions, 7691 flow [2024-06-04 14:57:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 14:57:07,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:57:07,817 INFO L175 Difference]: Start difference. First operand has 349 places, 529 transitions, 6231 flow. Second operand 9 states and 144 transitions. [2024-06-04 14:57:07,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 556 transitions, 7691 flow [2024-06-04 14:57:10,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 556 transitions, 7527 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-04 14:57:10,058 INFO L231 Difference]: Finished difference. Result has 354 places, 533 transitions, 6222 flow [2024-06-04 14:57:10,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6222, PETRI_PLACES=354, PETRI_TRANSITIONS=533} [2024-06-04 14:57:10,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-04 14:57:10,059 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 533 transitions, 6222 flow [2024-06-04 14:57:10,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:10,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:10,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:10,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:57:10,059 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)] === [2024-06-04 14:57:10,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 44753620, now seen corresponding path program 2 times [2024-06-04 14:57:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:10,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304956623] [2024-06-04 14:57:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:11,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:11,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304956623] [2024-06-04 14:57:11,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304956623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:11,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:11,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181982634] [2024-06-04 14:57:11,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:11,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:11,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 533 transitions, 6222 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:11,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:11,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:11,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:12,706 INFO L124 PetriNetUnfolderBase]: 3768/5642 cut-off events. [2024-06-04 14:57:12,706 INFO L125 PetriNetUnfolderBase]: For 1034870/1034870 co-relation queries the response was YES. [2024-06-04 14:57:12,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51693 conditions, 5642 events. 3768/5642 cut-off events. For 1034870/1034870 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29942 event pairs, 1372 based on Foata normal form. 2/5644 useless extension candidates. Maximal degree in co-relation 51522. Up to 5571 conditions per place. [2024-06-04 14:57:12,791 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 526 selfloop transitions, 21 changer transitions 0/550 dead transitions. [2024-06-04 14:57:12,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 550 transitions, 7358 flow [2024-06-04 14:57:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:57:12,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:57:12,793 INFO L175 Difference]: Start difference. First operand has 354 places, 533 transitions, 6222 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:57:12,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 550 transitions, 7358 flow [2024-06-04 14:57:14,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 550 transitions, 7248 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:14,907 INFO L231 Difference]: Finished difference. Result has 357 places, 533 transitions, 6159 flow [2024-06-04 14:57:14,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6159, PETRI_PLACES=357, PETRI_TRANSITIONS=533} [2024-06-04 14:57:14,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-04 14:57:14,907 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 533 transitions, 6159 flow [2024-06-04 14:57:14,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:14,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:14,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:14,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:57:14,908 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)] === [2024-06-04 14:57:14,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 162841300, now seen corresponding path program 3 times [2024-06-04 14:57:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:14,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622950459] [2024-06-04 14:57:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:14,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:15,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:15,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622950459] [2024-06-04 14:57:15,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622950459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:15,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:15,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:15,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982446585] [2024-06-04 14:57:15,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:15,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:15,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:15,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:15,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 533 transitions, 6159 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:15,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:15,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:15,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:17,369 INFO L124 PetriNetUnfolderBase]: 3776/5654 cut-off events. [2024-06-04 14:57:17,370 INFO L125 PetriNetUnfolderBase]: For 1054851/1054851 co-relation queries the response was YES. [2024-06-04 14:57:17,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51891 conditions, 5654 events. 3776/5654 cut-off events. For 1054851/1054851 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30031 event pairs, 1373 based on Foata normal form. 2/5656 useless extension candidates. Maximal degree in co-relation 51718. Up to 5562 conditions per place. [2024-06-04 14:57:17,455 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 509 selfloop transitions, 37 changer transitions 0/549 dead transitions. [2024-06-04 14:57:17,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 549 transitions, 7337 flow [2024-06-04 14:57:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 14:57:17,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 14:57:17,456 INFO L175 Difference]: Start difference. First operand has 357 places, 533 transitions, 6159 flow. Second operand 8 states and 129 transitions. [2024-06-04 14:57:17,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 549 transitions, 7337 flow [2024-06-04 14:57:19,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 549 transitions, 7290 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:19,556 INFO L231 Difference]: Finished difference. Result has 358 places, 535 transitions, 6247 flow [2024-06-04 14:57:19,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6247, PETRI_PLACES=358, PETRI_TRANSITIONS=535} [2024-06-04 14:57:19,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-04 14:57:19,556 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 535 transitions, 6247 flow [2024-06-04 14:57:19,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:19,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:19,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:19,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:57:19,557 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)] === [2024-06-04 14:57:19,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash -221750350, now seen corresponding path program 4 times [2024-06-04 14:57:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:19,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209469845] [2024-06-04 14:57:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:19,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:20,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209469845] [2024-06-04 14:57:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209469845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:20,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:20,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:20,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053879170] [2024-06-04 14:57:20,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:20,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:20,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:20,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:20,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 535 transitions, 6247 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:20,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:20,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:20,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:22,322 INFO L124 PetriNetUnfolderBase]: 3771/5649 cut-off events. [2024-06-04 14:57:22,322 INFO L125 PetriNetUnfolderBase]: For 1063099/1063101 co-relation queries the response was YES. [2024-06-04 14:57:22,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51961 conditions, 5649 events. 3771/5649 cut-off events. For 1063099/1063101 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29915 event pairs, 1383 based on Foata normal form. 2/5651 useless extension candidates. Maximal degree in co-relation 51787. Up to 5555 conditions per place. [2024-06-04 14:57:22,402 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 508 selfloop transitions, 37 changer transitions 0/548 dead transitions. [2024-06-04 14:57:22,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 548 transitions, 7419 flow [2024-06-04 14:57:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 14:57:22,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 14:57:22,404 INFO L175 Difference]: Start difference. First operand has 358 places, 535 transitions, 6247 flow. Second operand 8 states and 126 transitions. [2024-06-04 14:57:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 548 transitions, 7419 flow [2024-06-04 14:57:24,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 548 transitions, 7300 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:24,790 INFO L231 Difference]: Finished difference. Result has 360 places, 537 transitions, 6267 flow [2024-06-04 14:57:24,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6128, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6267, PETRI_PLACES=360, PETRI_TRANSITIONS=537} [2024-06-04 14:57:24,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-04 14:57:24,790 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 537 transitions, 6267 flow [2024-06-04 14:57:24,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:24,791 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] [2024-06-04 14:57:24,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:57:24,791 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)] === [2024-06-04 14:57:24,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1271226343, now seen corresponding path program 1 times [2024-06-04 14:57:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732577261] [2024-06-04 14:57:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:25,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:25,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732577261] [2024-06-04 14:57:25,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732577261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:25,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:25,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:25,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365843265] [2024-06-04 14:57:25,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:25,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:25,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:25,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:25,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:25,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 537 transitions, 6267 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:25,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:25,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:25,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:27,163 INFO L124 PetriNetUnfolderBase]: 4032/6019 cut-off events. [2024-06-04 14:57:27,164 INFO L125 PetriNetUnfolderBase]: For 1089965/1089983 co-relation queries the response was YES. [2024-06-04 14:57:27,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55647 conditions, 6019 events. 4032/6019 cut-off events. For 1089965/1089983 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31983 event pairs, 795 based on Foata normal form. 19/6038 useless extension candidates. Maximal degree in co-relation 55472. Up to 5559 conditions per place. [2024-06-04 14:57:27,264 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 533 selfloop transitions, 118 changer transitions 0/654 dead transitions. [2024-06-04 14:57:27,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 654 transitions, 9612 flow [2024-06-04 14:57:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 14:57:27,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 14:57:27,265 INFO L175 Difference]: Start difference. First operand has 360 places, 537 transitions, 6267 flow. Second operand 9 states and 165 transitions. [2024-06-04 14:57:27,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 654 transitions, 9612 flow [2024-06-04 14:57:29,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 654 transitions, 9489 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:29,730 INFO L231 Difference]: Finished difference. Result has 367 places, 604 transitions, 7473 flow [2024-06-04 14:57:29,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7473, PETRI_PLACES=367, PETRI_TRANSITIONS=604} [2024-06-04 14:57:29,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-04 14:57:29,731 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 604 transitions, 7473 flow [2024-06-04 14:57:29,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:29,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:29,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:29,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:57:29,732 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)] === [2024-06-04 14:57:29,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1447803443, now seen corresponding path program 2 times [2024-06-04 14:57:29,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:29,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552513940] [2024-06-04 14:57:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:30,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:30,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552513940] [2024-06-04 14:57:30,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552513940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:30,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:30,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:57:30,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317133050] [2024-06-04 14:57:30,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:30,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:57:30,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:57:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:57:30,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:30,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 604 transitions, 7473 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:30,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:30,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:30,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:31,866 INFO L124 PetriNetUnfolderBase]: 4037/6026 cut-off events. [2024-06-04 14:57:31,866 INFO L125 PetriNetUnfolderBase]: For 1113452/1113470 co-relation queries the response was YES. [2024-06-04 14:57:31,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57235 conditions, 6026 events. 4037/6026 cut-off events. For 1113452/1113470 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32059 event pairs, 812 based on Foata normal form. 19/6045 useless extension candidates. Maximal degree in co-relation 57055. Up to 5565 conditions per place. [2024-06-04 14:57:31,962 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 528 selfloop transitions, 122 changer transitions 0/653 dead transitions. [2024-06-04 14:57:31,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 653 transitions, 9953 flow [2024-06-04 14:57:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:57:31,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-04 14:57:31,964 INFO L175 Difference]: Start difference. First operand has 367 places, 604 transitions, 7473 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:57:31,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 653 transitions, 9953 flow [2024-06-04 14:57:34,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 653 transitions, 9842 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-04 14:57:34,843 INFO L231 Difference]: Finished difference. Result has 374 places, 609 transitions, 7749 flow [2024-06-04 14:57:34,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7378, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7749, PETRI_PLACES=374, PETRI_TRANSITIONS=609} [2024-06-04 14:57:34,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-04 14:57:34,843 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 609 transitions, 7749 flow [2024-06-04 14:57:34,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:34,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:34,844 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] [2024-06-04 14:57:34,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:57:34,844 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)] === [2024-06-04 14:57:34,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash -385723835, now seen corresponding path program 3 times [2024-06-04 14:57:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447732826] [2024-06-04 14:57:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:34,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:35,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:35,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447732826] [2024-06-04 14:57:35,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447732826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:35,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:35,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:57:35,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948827191] [2024-06-04 14:57:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:35,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:57:35,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:57:35,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:57:35,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:35,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 609 transitions, 7749 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:35,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:35,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:35,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:37,081 INFO L124 PetriNetUnfolderBase]: 4034/6024 cut-off events. [2024-06-04 14:57:37,081 INFO L125 PetriNetUnfolderBase]: For 1128375/1128393 co-relation queries the response was YES. [2024-06-04 14:57:37,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57672 conditions, 6024 events. 4034/6024 cut-off events. For 1128375/1128393 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32015 event pairs, 806 based on Foata normal form. 19/6043 useless extension candidates. Maximal degree in co-relation 57489. Up to 5562 conditions per place. [2024-06-04 14:57:37,177 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 524 selfloop transitions, 123 changer transitions 0/650 dead transitions. [2024-06-04 14:57:37,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 650 transitions, 9913 flow [2024-06-04 14:57:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:57:37,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-04 14:57:37,178 INFO L175 Difference]: Start difference. First operand has 374 places, 609 transitions, 7749 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:57:37,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 650 transitions, 9913 flow [2024-06-04 14:57:39,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 650 transitions, 9682 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:39,660 INFO L231 Difference]: Finished difference. Result has 378 places, 617 transitions, 7962 flow [2024-06-04 14:57:39,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7521, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7962, PETRI_PLACES=378, PETRI_TRANSITIONS=617} [2024-06-04 14:57:39,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 14:57:39,661 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 617 transitions, 7962 flow [2024-06-04 14:57:39,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:39,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:39,661 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] [2024-06-04 14:57:39,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:57:39,661 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)] === [2024-06-04 14:57:39,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -937416420, now seen corresponding path program 1 times [2024-06-04 14:57:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287085525] [2024-06-04 14:57:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287085525] [2024-06-04 14:57:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287085525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:40,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:40,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2566073] [2024-06-04 14:57:40,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:40,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:40,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 617 transitions, 7962 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:57:40,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:40,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:40,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:42,177 INFO L124 PetriNetUnfolderBase]: 4241/6332 cut-off events. [2024-06-04 14:57:42,177 INFO L125 PetriNetUnfolderBase]: For 1193838/1193866 co-relation queries the response was YES. [2024-06-04 14:57:42,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60502 conditions, 6332 events. 4241/6332 cut-off events. For 1193838/1193866 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34057 event pairs, 819 based on Foata normal form. 32/6364 useless extension candidates. Maximal degree in co-relation 60317. Up to 5393 conditions per place. [2024-06-04 14:57:42,274 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 474 selfloop transitions, 235 changer transitions 0/712 dead transitions. [2024-06-04 14:57:42,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 712 transitions, 10674 flow [2024-06-04 14:57:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 14:57:42,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-04 14:57:42,276 INFO L175 Difference]: Start difference. First operand has 378 places, 617 transitions, 7962 flow. Second operand 10 states and 186 transitions. [2024-06-04 14:57:42,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 712 transitions, 10674 flow [2024-06-04 14:57:46,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 712 transitions, 10539 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:57:46,049 INFO L231 Difference]: Finished difference. Result has 389 places, 664 transitions, 9194 flow [2024-06-04 14:57:46,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7842, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9194, PETRI_PLACES=389, PETRI_TRANSITIONS=664} [2024-06-04 14:57:46,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-04 14:57:46,050 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 664 transitions, 9194 flow [2024-06-04 14:57:46,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:57:46,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:46,050 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] [2024-06-04 14:57:46,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:57:46,051 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)] === [2024-06-04 14:57:46,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1486681764, now seen corresponding path program 2 times [2024-06-04 14:57:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:46,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332145109] [2024-06-04 14:57:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:46,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332145109] [2024-06-04 14:57:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332145109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:46,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:46,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:57:46,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001818001] [2024-06-04 14:57:46,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:46,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:57:46,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:57:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:57:47,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:47,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 664 transitions, 9194 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-04 14:57:47,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:47,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:47,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:48,975 INFO L124 PetriNetUnfolderBase]: 4682/6997 cut-off events. [2024-06-04 14:57:48,975 INFO L125 PetriNetUnfolderBase]: For 1277414/1277440 co-relation queries the response was YES. [2024-06-04 14:57:49,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67659 conditions, 6997 events. 4682/6997 cut-off events. For 1277414/1277440 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 38572 event pairs, 1079 based on Foata normal form. 30/7027 useless extension candidates. Maximal degree in co-relation 67469. Up to 6059 conditions per place. [2024-06-04 14:57:49,080 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 592 selfloop transitions, 231 changer transitions 0/826 dead transitions. [2024-06-04 14:57:49,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 826 transitions, 13007 flow [2024-06-04 14:57:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:57:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:57:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-04 14:57:49,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-04 14:57:49,082 INFO L175 Difference]: Start difference. First operand has 389 places, 664 transitions, 9194 flow. Second operand 11 states and 200 transitions. [2024-06-04 14:57:49,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 826 transitions, 13007 flow [2024-06-04 14:57:52,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 826 transitions, 12794 flow, removed 95 selfloop flow, removed 2 redundant places. [2024-06-04 14:57:52,620 INFO L231 Difference]: Finished difference. Result has 404 places, 777 transitions, 11565 flow [2024-06-04 14:57:52,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9073, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11565, PETRI_PLACES=404, PETRI_TRANSITIONS=777} [2024-06-04 14:57:52,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-04 14:57:52,621 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 777 transitions, 11565 flow [2024-06-04 14:57:52,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-04 14:57:52,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:52,622 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] [2024-06-04 14:57:52,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:57:52,622 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)] === [2024-06-04 14:57:52,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1435681642, now seen corresponding path program 3 times [2024-06-04 14:57:52,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:52,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829584834] [2024-06-04 14:57:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:52,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:53,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:53,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829584834] [2024-06-04 14:57:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829584834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:53,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:53,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:53,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842893805] [2024-06-04 14:57:53,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:53,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:53,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:53,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:53,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:57:53,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 777 transitions, 11565 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:57:53,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:53,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:57:53,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:55,481 INFO L124 PetriNetUnfolderBase]: 4837/7236 cut-off events. [2024-06-04 14:57:55,481 INFO L125 PetriNetUnfolderBase]: For 1320468/1320498 co-relation queries the response was YES. [2024-06-04 14:57:55,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71324 conditions, 7236 events. 4837/7236 cut-off events. For 1320468/1320498 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 40180 event pairs, 872 based on Foata normal form. 34/7270 useless extension candidates. Maximal degree in co-relation 71126. Up to 5549 conditions per place. [2024-06-04 14:57:55,592 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 478 selfloop transitions, 362 changer transitions 0/843 dead transitions. [2024-06-04 14:57:55,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 843 transitions, 14284 flow [2024-06-04 14:57:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-04 14:57:55,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-04 14:57:55,594 INFO L175 Difference]: Start difference. First operand has 404 places, 777 transitions, 11565 flow. Second operand 10 states and 182 transitions. [2024-06-04 14:57:55,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 843 transitions, 14284 flow [2024-06-04 14:57:59,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 843 transitions, 14125 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-04 14:57:59,503 INFO L231 Difference]: Finished difference. Result has 415 places, 805 transitions, 12731 flow [2024-06-04 14:57:59,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11460, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12731, PETRI_PLACES=415, PETRI_TRANSITIONS=805} [2024-06-04 14:57:59,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-04 14:57:59,504 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 805 transitions, 12731 flow [2024-06-04 14:57:59,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:57:59,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:59,504 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] [2024-06-04 14:57:59,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:57:59,504 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)] === [2024-06-04 14:57:59,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash -385725540, now seen corresponding path program 4 times [2024-06-04 14:57:59,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:59,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627776998] [2024-06-04 14:57:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:00,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:00,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627776998] [2024-06-04 14:58:00,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627776998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:00,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:00,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:00,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668830007] [2024-06-04 14:58:00,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:00,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:00,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:00,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:00,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:00,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:00,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 805 transitions, 12731 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:58:00,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:00,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:00,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:02,400 INFO L124 PetriNetUnfolderBase]: 4869/7284 cut-off events. [2024-06-04 14:58:02,400 INFO L125 PetriNetUnfolderBase]: For 1375143/1375173 co-relation queries the response was YES. [2024-06-04 14:58:02,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73844 conditions, 7284 events. 4869/7284 cut-off events. For 1375143/1375173 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 40543 event pairs, 1059 based on Foata normal form. 38/7322 useless extension candidates. Maximal degree in co-relation 73641. Up to 6181 conditions per place. [2024-06-04 14:58:02,516 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 545 selfloop transitions, 306 changer transitions 0/854 dead transitions. [2024-06-04 14:58:02,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 854 transitions, 15284 flow [2024-06-04 14:58:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-04 14:58:02,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-04 14:58:02,518 INFO L175 Difference]: Start difference. First operand has 415 places, 805 transitions, 12731 flow. Second operand 10 states and 181 transitions. [2024-06-04 14:58:02,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 854 transitions, 15284 flow [2024-06-04 14:58:05,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 854 transitions, 14786 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:05,917 INFO L231 Difference]: Finished difference. Result has 422 places, 815 transitions, 13074 flow [2024-06-04 14:58:05,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12233, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13074, PETRI_PLACES=422, PETRI_TRANSITIONS=815} [2024-06-04 14:58:05,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-04 14:58:05,918 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 815 transitions, 13074 flow [2024-06-04 14:58:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:58:05,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:05,918 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] [2024-06-04 14:58:05,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:58:05,919 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)] === [2024-06-04 14:58:05,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash -403590499, now seen corresponding path program 1 times [2024-06-04 14:58:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606736697] [2024-06-04 14:58:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:06,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:06,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606736697] [2024-06-04 14:58:06,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606736697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:06,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:06,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:06,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481341520] [2024-06-04 14:58:06,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:06,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:07,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:07,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 815 transitions, 13074 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:58:07,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:07,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:07,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:09,309 INFO L124 PetriNetUnfolderBase]: 4945/7390 cut-off events. [2024-06-04 14:58:09,310 INFO L125 PetriNetUnfolderBase]: For 1385729/1385763 co-relation queries the response was YES. [2024-06-04 14:58:09,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75460 conditions, 7390 events. 4945/7390 cut-off events. For 1385729/1385763 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 41157 event pairs, 1064 based on Foata normal form. 38/7428 useless extension candidates. Maximal degree in co-relation 75254. Up to 5690 conditions per place. [2024-06-04 14:58:09,432 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 479 selfloop transitions, 390 changer transitions 0/872 dead transitions. [2024-06-04 14:58:09,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 872 transitions, 15786 flow [2024-06-04 14:58:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 14:58:09,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:58:09,433 INFO L175 Difference]: Start difference. First operand has 422 places, 815 transitions, 13074 flow. Second operand 10 states and 190 transitions. [2024-06-04 14:58:09,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 872 transitions, 15786 flow [2024-06-04 14:58:12,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 872 transitions, 15479 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:12,848 INFO L231 Difference]: Finished difference. Result has 429 places, 837 transitions, 13940 flow [2024-06-04 14:58:12,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12767, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13940, PETRI_PLACES=429, PETRI_TRANSITIONS=837} [2024-06-04 14:58:12,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-04 14:58:12,849 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 837 transitions, 13940 flow [2024-06-04 14:58:12,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:58:12,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:12,850 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] [2024-06-04 14:58:12,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:58:12,850 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)] === [2024-06-04 14:58:12,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash -929997810, now seen corresponding path program 5 times [2024-06-04 14:58:12,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:12,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662063554] [2024-06-04 14:58:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:12,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:13,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:13,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662063554] [2024-06-04 14:58:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662063554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:13,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:13,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:13,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24088453] [2024-06-04 14:58:13,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:13,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:13,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:13,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:13,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:13,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 837 transitions, 13940 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:58:13,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:13,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:13,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:15,848 INFO L124 PetriNetUnfolderBase]: 4925/7362 cut-off events. [2024-06-04 14:58:15,848 INFO L125 PetriNetUnfolderBase]: For 1390818/1390852 co-relation queries the response was YES. [2024-06-04 14:58:15,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75558 conditions, 7362 events. 4925/7362 cut-off events. For 1390818/1390852 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 41030 event pairs, 1056 based on Foata normal form. 42/7404 useless extension candidates. Maximal degree in co-relation 75350. Up to 6367 conditions per place. [2024-06-04 14:58:15,987 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 575 selfloop transitions, 293 changer transitions 0/871 dead transitions. [2024-06-04 14:58:15,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 871 transitions, 16091 flow [2024-06-04 14:58:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-04 14:58:15,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-04 14:58:15,989 INFO L175 Difference]: Start difference. First operand has 429 places, 837 transitions, 13940 flow. Second operand 10 states and 179 transitions. [2024-06-04 14:58:15,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 871 transitions, 16091 flow [2024-06-04 14:58:19,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 871 transitions, 15890 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-04 14:58:19,705 INFO L231 Difference]: Finished difference. Result has 437 places, 837 transitions, 14335 flow [2024-06-04 14:58:19,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13739, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14335, PETRI_PLACES=437, PETRI_TRANSITIONS=837} [2024-06-04 14:58:19,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 14:58:19,706 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 837 transitions, 14335 flow [2024-06-04 14:58:19,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 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) [2024-06-04 14:58:19,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:19,706 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] [2024-06-04 14:58:19,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:58:19,706 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)] === [2024-06-04 14:58:19,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:19,707 INFO L85 PathProgramCache]: Analyzing trace with hash -515314102, now seen corresponding path program 1 times [2024-06-04 14:58:19,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:19,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410691915] [2024-06-04 14:58:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:19,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:20,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:20,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410691915] [2024-06-04 14:58:20,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410691915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:20,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:20,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915156977] [2024-06-04 14:58:20,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:20,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:20,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:20,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 837 transitions, 14335 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:20,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:20,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:20,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:22,703 INFO L124 PetriNetUnfolderBase]: 5183/7744 cut-off events. [2024-06-04 14:58:22,703 INFO L125 PetriNetUnfolderBase]: For 1405092/1405134 co-relation queries the response was YES. [2024-06-04 14:58:22,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79477 conditions, 7744 events. 5183/7744 cut-off events. For 1405092/1405134 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 43419 event pairs, 1111 based on Foata normal form. 44/7788 useless extension candidates. Maximal degree in co-relation 79267. Up to 7215 conditions per place. [2024-06-04 14:58:22,839 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 840 selfloop transitions, 89 changer transitions 0/932 dead transitions. [2024-06-04 14:58:22,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 932 transitions, 17677 flow [2024-06-04 14:58:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:58:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:58:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-04 14:58:22,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:58:22,841 INFO L175 Difference]: Start difference. First operand has 437 places, 837 transitions, 14335 flow. Second operand 11 states and 189 transitions. [2024-06-04 14:58:22,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 932 transitions, 17677 flow [2024-06-04 14:58:26,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 932 transitions, 17095 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:26,765 INFO L231 Difference]: Finished difference. Result has 445 places, 889 transitions, 14869 flow [2024-06-04 14:58:26,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13755, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14869, PETRI_PLACES=445, PETRI_TRANSITIONS=889} [2024-06-04 14:58:26,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-04 14:58:26,766 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 889 transitions, 14869 flow [2024-06-04 14:58:26,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:26,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:26,766 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] [2024-06-04 14:58:26,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:58:26,767 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)] === [2024-06-04 14:58:26,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:26,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1526553022, now seen corresponding path program 1 times [2024-06-04 14:58:26,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:26,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41205768] [2024-06-04 14:58:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:26,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:27,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:27,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41205768] [2024-06-04 14:58:27,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41205768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:27,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:27,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:27,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2618868] [2024-06-04 14:58:27,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:27,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:27,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:27,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:27,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 889 transitions, 14869 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:27,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:27,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:27,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:29,771 INFO L124 PetriNetUnfolderBase]: 5291/7898 cut-off events. [2024-06-04 14:58:29,772 INFO L125 PetriNetUnfolderBase]: For 1496797/1496847 co-relation queries the response was YES. [2024-06-04 14:58:29,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81361 conditions, 7898 events. 5291/7898 cut-off events. For 1496797/1496847 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 44432 event pairs, 1131 based on Foata normal form. 62/7960 useless extension candidates. Maximal degree in co-relation 81146. Up to 7341 conditions per place. [2024-06-04 14:58:29,916 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 853 selfloop transitions, 85 changer transitions 0/941 dead transitions. [2024-06-04 14:58:29,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 941 transitions, 17220 flow [2024-06-04 14:58:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-04 14:58:29,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-04 14:58:29,917 INFO L175 Difference]: Start difference. First operand has 445 places, 889 transitions, 14869 flow. Second operand 10 states and 177 transitions. [2024-06-04 14:58:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 941 transitions, 17220 flow [2024-06-04 14:58:34,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 941 transitions, 17127 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 14:58:34,565 INFO L231 Difference]: Finished difference. Result has 455 places, 902 transitions, 15210 flow [2024-06-04 14:58:34,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14776, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15210, PETRI_PLACES=455, PETRI_TRANSITIONS=902} [2024-06-04 14:58:34,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-04 14:58:34,566 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 902 transitions, 15210 flow [2024-06-04 14:58:34,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:34,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:34,566 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] [2024-06-04 14:58:34,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:58:34,566 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)] === [2024-06-04 14:58:34,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:34,567 INFO L85 PathProgramCache]: Analyzing trace with hash 621295732, now seen corresponding path program 2 times [2024-06-04 14:58:34,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:34,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853680742] [2024-06-04 14:58:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:35,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853680742] [2024-06-04 14:58:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853680742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:35,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:35,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433035661] [2024-06-04 14:58:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:35,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:35,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:35,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 902 transitions, 15210 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:35,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:35,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:35,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:37,483 INFO L124 PetriNetUnfolderBase]: 5285/7889 cut-off events. [2024-06-04 14:58:37,483 INFO L125 PetriNetUnfolderBase]: For 1442219/1442269 co-relation queries the response was YES. [2024-06-04 14:58:37,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82028 conditions, 7889 events. 5285/7889 cut-off events. For 1442219/1442269 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 44343 event pairs, 1114 based on Foata normal form. 52/7941 useless extension candidates. Maximal degree in co-relation 81809. Up to 7322 conditions per place. [2024-06-04 14:58:37,634 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 839 selfloop transitions, 95 changer transitions 0/937 dead transitions. [2024-06-04 14:58:37,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 937 transitions, 17537 flow [2024-06-04 14:58:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:58:37,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 14:58:37,636 INFO L175 Difference]: Start difference. First operand has 455 places, 902 transitions, 15210 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:58:37,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 937 transitions, 17537 flow [2024-06-04 14:58:41,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 937 transitions, 17330 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:41,992 INFO L231 Difference]: Finished difference. Result has 460 places, 902 transitions, 15201 flow [2024-06-04 14:58:41,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15003, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15201, PETRI_PLACES=460, PETRI_TRANSITIONS=902} [2024-06-04 14:58:41,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-04 14:58:41,993 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 902 transitions, 15201 flow [2024-06-04 14:58:41,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:41,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:41,994 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] [2024-06-04 14:58:41,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:58:41,994 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)] === [2024-06-04 14:58:41,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1448801832, now seen corresponding path program 3 times [2024-06-04 14:58:41,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:41,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204863595] [2024-06-04 14:58:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:41,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:42,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:42,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204863595] [2024-06-04 14:58:42,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204863595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:42,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:42,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:42,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842735383] [2024-06-04 14:58:42,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:42,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:42,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:42,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:42,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 902 transitions, 15201 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:42,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:42,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:42,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:45,180 INFO L124 PetriNetUnfolderBase]: 5337/7962 cut-off events. [2024-06-04 14:58:45,180 INFO L125 PetriNetUnfolderBase]: For 1466415/1466445 co-relation queries the response was YES. [2024-06-04 14:58:45,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82548 conditions, 7962 events. 5337/7962 cut-off events. For 1466415/1466445 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 44767 event pairs, 1176 based on Foata normal form. 32/7994 useless extension candidates. Maximal degree in co-relation 82328. Up to 7442 conditions per place. [2024-06-04 14:58:45,348 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 854 selfloop transitions, 96 changer transitions 0/953 dead transitions. [2024-06-04 14:58:45,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 953 transitions, 17653 flow [2024-06-04 14:58:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 14:58:45,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:58:45,350 INFO L175 Difference]: Start difference. First operand has 460 places, 902 transitions, 15201 flow. Second operand 9 states and 162 transitions. [2024-06-04 14:58:45,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 953 transitions, 17653 flow [2024-06-04 14:58:49,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 953 transitions, 17437 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:58:49,882 INFO L231 Difference]: Finished difference. Result has 462 places, 918 transitions, 15595 flow [2024-06-04 14:58:49,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15011, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15595, PETRI_PLACES=462, PETRI_TRANSITIONS=918} [2024-06-04 14:58:49,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-04 14:58:49,883 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 918 transitions, 15595 flow [2024-06-04 14:58:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:49,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:49,884 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] [2024-06-04 14:58:49,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:58:49,884 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)] === [2024-06-04 14:58:49,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash -520556512, now seen corresponding path program 4 times [2024-06-04 14:58:49,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:49,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423364711] [2024-06-04 14:58:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:49,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:50,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423364711] [2024-06-04 14:58:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423364711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:50,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:50,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:50,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282821847] [2024-06-04 14:58:50,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:50,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:50,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 918 transitions, 15595 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:50,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:50,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:50,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:52,959 INFO L124 PetriNetUnfolderBase]: 5485/8168 cut-off events. [2024-06-04 14:58:52,959 INFO L125 PetriNetUnfolderBase]: For 1533558/1533590 co-relation queries the response was YES. [2024-06-04 14:58:53,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84908 conditions, 8168 events. 5485/8168 cut-off events. For 1533558/1533590 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 46122 event pairs, 1194 based on Foata normal form. 34/8202 useless extension candidates. Maximal degree in co-relation 84686. Up to 7197 conditions per place. [2024-06-04 14:58:53,140 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 819 selfloop transitions, 199 changer transitions 0/1021 dead transitions. [2024-06-04 14:58:53,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1021 transitions, 19459 flow [2024-06-04 14:58:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 14:58:53,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-04 14:58:53,141 INFO L175 Difference]: Start difference. First operand has 462 places, 918 transitions, 15595 flow. Second operand 9 states and 169 transitions. [2024-06-04 14:58:53,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1021 transitions, 19459 flow [2024-06-04 14:58:58,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1021 transitions, 19328 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:58,056 INFO L231 Difference]: Finished difference. Result has 469 places, 973 transitions, 16701 flow [2024-06-04 14:58:58,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15464, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16701, PETRI_PLACES=469, PETRI_TRANSITIONS=973} [2024-06-04 14:58:58,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-04 14:58:58,057 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 973 transitions, 16701 flow [2024-06-04 14:58:58,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:58,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:58,058 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] [2024-06-04 14:58:58,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:58:58,058 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)] === [2024-06-04 14:58:58,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:58,059 INFO L85 PathProgramCache]: Analyzing trace with hash -484599628, now seen corresponding path program 2 times [2024-06-04 14:58:58,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:58,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602595406] [2024-06-04 14:58:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:58,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:58,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:58,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602595406] [2024-06-04 14:58:58,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602595406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:58,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:58,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:58,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322814301] [2024-06-04 14:58:58,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:58,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:58,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:58,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:58,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:58,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:58:58,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 973 transitions, 16701 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:58,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:58,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:58:58,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:02,134 INFO L124 PetriNetUnfolderBase]: 6023/8916 cut-off events. [2024-06-04 14:59:02,134 INFO L125 PetriNetUnfolderBase]: For 1907573/1907623 co-relation queries the response was YES. [2024-06-04 14:59:02,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96570 conditions, 8916 events. 6023/8916 cut-off events. For 1907573/1907623 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 50375 event pairs, 1285 based on Foata normal form. 62/8978 useless extension candidates. Maximal degree in co-relation 96345. Up to 6897 conditions per place. [2024-06-04 14:59:02,305 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 869 selfloop transitions, 233 changer transitions 0/1105 dead transitions. [2024-06-04 14:59:02,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1105 transitions, 21270 flow [2024-06-04 14:59:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-04 14:59:02,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-04 14:59:02,306 INFO L175 Difference]: Start difference. First operand has 469 places, 973 transitions, 16701 flow. Second operand 10 states and 196 transitions. [2024-06-04 14:59:02,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1105 transitions, 21270 flow [2024-06-04 14:59:08,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1105 transitions, 21187 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-04 14:59:08,864 INFO L231 Difference]: Finished difference. Result has 483 places, 1031 transitions, 18297 flow [2024-06-04 14:59:08,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16618, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18297, PETRI_PLACES=483, PETRI_TRANSITIONS=1031} [2024-06-04 14:59:08,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-04 14:59:08,865 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 1031 transitions, 18297 flow [2024-06-04 14:59:08,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:08,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:08,865 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] [2024-06-04 14:59:08,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:59:08,865 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)] === [2024-06-04 14:59:08,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:08,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2109704578, now seen corresponding path program 3 times [2024-06-04 14:59:08,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:08,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14571018] [2024-06-04 14:59:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:08,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:09,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:09,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14571018] [2024-06-04 14:59:09,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14571018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:09,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:09,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:09,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458829532] [2024-06-04 14:59:09,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:09,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:09,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:09,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:09,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:09,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 1031 transitions, 18297 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:09,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:09,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:09,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:13,218 INFO L124 PetriNetUnfolderBase]: 5987/8868 cut-off events. [2024-06-04 14:59:13,218 INFO L125 PetriNetUnfolderBase]: For 1870348/1870398 co-relation queries the response was YES. [2024-06-04 14:59:13,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98864 conditions, 8868 events. 5987/8868 cut-off events. For 1870348/1870398 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 50153 event pairs, 1272 based on Foata normal form. 62/8930 useless extension candidates. Maximal degree in co-relation 98631. Up to 6881 conditions per place. [2024-06-04 14:59:13,383 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 871 selfloop transitions, 232 changer transitions 0/1106 dead transitions. [2024-06-04 14:59:13,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1106 transitions, 21883 flow [2024-06-04 14:59:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-04 14:59:13,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-04 14:59:13,385 INFO L175 Difference]: Start difference. First operand has 483 places, 1031 transitions, 18297 flow. Second operand 10 states and 198 transitions. [2024-06-04 14:59:13,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1106 transitions, 21883 flow [2024-06-04 14:59:20,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1106 transitions, 21665 flow, removed 108 selfloop flow, removed 1 redundant places. [2024-06-04 14:59:20,510 INFO L231 Difference]: Finished difference. Result has 492 places, 1031 transitions, 18550 flow [2024-06-04 14:59:20,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18079, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18550, PETRI_PLACES=492, PETRI_TRANSITIONS=1031} [2024-06-04 14:59:20,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-04 14:59:20,511 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1031 transitions, 18550 flow [2024-06-04 14:59:20,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:20,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:20,519 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] [2024-06-04 14:59:20,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:59:20,519 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)] === [2024-06-04 14:59:20,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:20,519 INFO L85 PathProgramCache]: Analyzing trace with hash 309078724, now seen corresponding path program 5 times [2024-06-04 14:59:20,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:20,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801640075] [2024-06-04 14:59:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:21,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:21,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801640075] [2024-06-04 14:59:21,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801640075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:21,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:21,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:21,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645428047] [2024-06-04 14:59:21,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:21,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:21,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:21,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:21,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1031 transitions, 18550 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:21,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:21,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:21,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:24,798 INFO L124 PetriNetUnfolderBase]: 6029/8928 cut-off events. [2024-06-04 14:59:24,799 INFO L125 PetriNetUnfolderBase]: For 1853282/1853332 co-relation queries the response was YES. [2024-06-04 14:59:24,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100145 conditions, 8928 events. 6029/8928 cut-off events. For 1853282/1853332 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 50439 event pairs, 1214 based on Foata normal form. 52/8980 useless extension candidates. Maximal degree in co-relation 99909. Up to 7923 conditions per place. [2024-06-04 14:59:24,982 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 873 selfloop transitions, 207 changer transitions 0/1083 dead transitions. [2024-06-04 14:59:24,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 1083 transitions, 21936 flow [2024-06-04 14:59:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 14:59:24,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:59:24,984 INFO L175 Difference]: Start difference. First operand has 492 places, 1031 transitions, 18550 flow. Second operand 9 states and 162 transitions. [2024-06-04 14:59:24,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 1083 transitions, 21936 flow [2024-06-04 14:59:31,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1083 transitions, 21483 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:59:31,581 INFO L231 Difference]: Finished difference. Result has 495 places, 1040 transitions, 18736 flow [2024-06-04 14:59:31,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18109, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=833, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18736, PETRI_PLACES=495, PETRI_TRANSITIONS=1040} [2024-06-04 14:59:31,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-04 14:59:31,582 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 1040 transitions, 18736 flow [2024-06-04 14:59:31,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:31,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:31,583 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] [2024-06-04 14:59:31,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:59:31,585 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)] === [2024-06-04 14:59:31,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:31,585 INFO L85 PathProgramCache]: Analyzing trace with hash 15104888, now seen corresponding path program 6 times [2024-06-04 14:59:31,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:31,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756175824] [2024-06-04 14:59:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:31,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:32,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:32,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756175824] [2024-06-04 14:59:32,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756175824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:32,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:32,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:32,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316986314] [2024-06-04 14:59:32,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:32,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:32,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:32,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:32,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:32,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 1040 transitions, 18736 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:32,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:32,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:32,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:35,775 INFO L124 PetriNetUnfolderBase]: 6023/8920 cut-off events. [2024-06-04 14:59:35,775 INFO L125 PetriNetUnfolderBase]: For 1864949/1864999 co-relation queries the response was YES. [2024-06-04 14:59:35,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99719 conditions, 8920 events. 6023/8920 cut-off events. For 1864949/1864999 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 50422 event pairs, 1217 based on Foata normal form. 52/8972 useless extension candidates. Maximal degree in co-relation 99482. Up to 7918 conditions per place. [2024-06-04 14:59:35,946 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 868 selfloop transitions, 212 changer transitions 0/1083 dead transitions. [2024-06-04 14:59:35,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1083 transitions, 21912 flow [2024-06-04 14:59:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:59:35,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:59:35,949 INFO L175 Difference]: Start difference. First operand has 495 places, 1040 transitions, 18736 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:59:35,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1083 transitions, 21912 flow [2024-06-04 14:59:43,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1083 transitions, 21607 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:43,177 INFO L231 Difference]: Finished difference. Result has 500 places, 1040 transitions, 18861 flow [2024-06-04 14:59:43,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18431, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18861, PETRI_PLACES=500, PETRI_TRANSITIONS=1040} [2024-06-04 14:59:43,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-04 14:59:43,178 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 1040 transitions, 18861 flow [2024-06-04 14:59:43,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:43,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:43,178 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] [2024-06-04 14:59:43,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:59:43,179 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)] === [2024-06-04 14:59:43,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:43,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1842631932, now seen corresponding path program 4 times [2024-06-04 14:59:43,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:43,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826156089] [2024-06-04 14:59:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:43,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:43,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:43,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826156089] [2024-06-04 14:59:43,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826156089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:43,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:43,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:43,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797185894] [2024-06-04 14:59:43,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:43,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:43,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:44,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:44,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 1040 transitions, 18861 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:44,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:44,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:44,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:47,659 INFO L124 PetriNetUnfolderBase]: 6179/9136 cut-off events. [2024-06-04 14:59:47,660 INFO L125 PetriNetUnfolderBase]: For 2066754/2066804 co-relation queries the response was YES. [2024-06-04 14:59:47,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103432 conditions, 9136 events. 6179/9136 cut-off events. For 2066754/2066804 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 51651 event pairs, 1201 based on Foata normal form. 62/9198 useless extension candidates. Maximal degree in co-relation 103194. Up to 6982 conditions per place. [2024-06-04 14:59:47,836 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 869 selfloop transitions, 247 changer transitions 0/1119 dead transitions. [2024-06-04 14:59:47,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1119 transitions, 22885 flow [2024-06-04 14:59:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 14:59:47,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-04 14:59:47,838 INFO L175 Difference]: Start difference. First operand has 500 places, 1040 transitions, 18861 flow. Second operand 10 states and 192 transitions. [2024-06-04 14:59:47,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1119 transitions, 22885 flow [2024-06-04 14:59:54,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1119 transitions, 22494 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:54,889 INFO L231 Difference]: Finished difference. Result has 504 places, 1049 transitions, 19180 flow [2024-06-04 14:59:54,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18470, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19180, PETRI_PLACES=504, PETRI_TRANSITIONS=1049} [2024-06-04 14:59:54,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-04 14:59:54,890 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 1049 transitions, 19180 flow [2024-06-04 14:59:54,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:54,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:54,890 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] [2024-06-04 14:59:54,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:59:54,891 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)] === [2024-06-04 14:59:54,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1835280282, now seen corresponding path program 5 times [2024-06-04 14:59:54,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:54,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681215107] [2024-06-04 14:59:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:54,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:55,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:55,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681215107] [2024-06-04 14:59:55,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681215107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:55,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:55,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:55,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292454074] [2024-06-04 14:59:55,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:55,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:55,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:55,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:59:55,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1049 transitions, 19180 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:55,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:55,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:59:55,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:59,403 INFO L124 PetriNetUnfolderBase]: 6143/9088 cut-off events. [2024-06-04 14:59:59,403 INFO L125 PetriNetUnfolderBase]: For 2007360/2007410 co-relation queries the response was YES. [2024-06-04 14:59:59,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102284 conditions, 9088 events. 6143/9088 cut-off events. For 2007360/2007410 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 51391 event pairs, 1185 based on Foata normal form. 62/9150 useless extension candidates. Maximal degree in co-relation 102044. Up to 6966 conditions per place. [2024-06-04 14:59:59,569 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 845 selfloop transitions, 265 changer transitions 0/1113 dead transitions. [2024-06-04 14:59:59,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 1113 transitions, 22697 flow [2024-06-04 14:59:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 14:59:59,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-04 14:59:59,571 INFO L175 Difference]: Start difference. First operand has 504 places, 1049 transitions, 19180 flow. Second operand 10 states and 186 transitions. [2024-06-04 14:59:59,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 1113 transitions, 22697 flow [2024-06-04 15:00:06,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 1113 transitions, 22166 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-04 15:00:06,726 INFO L231 Difference]: Finished difference. Result has 509 places, 1050 transitions, 19217 flow [2024-06-04 15:00:06,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18649, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1049, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19217, PETRI_PLACES=509, PETRI_TRANSITIONS=1050} [2024-06-04 15:00:06,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-04 15:00:06,732 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1050 transitions, 19217 flow [2024-06-04 15:00:06,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:06,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:06,733 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] [2024-06-04 15:00:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 15:00:06,733 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)] === [2024-06-04 15:00:06,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1842637512, now seen corresponding path program 6 times [2024-06-04 15:00:06,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:06,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710388141] [2024-06-04 15:00:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:06,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:07,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:07,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710388141] [2024-06-04 15:00:07,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710388141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:07,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:07,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:07,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114743010] [2024-06-04 15:00:07,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:07,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:07,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:07,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:07,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:07,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1050 transitions, 19217 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:07,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:07,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:07,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:11,280 INFO L124 PetriNetUnfolderBase]: 6107/9040 cut-off events. [2024-06-04 15:00:11,281 INFO L125 PetriNetUnfolderBase]: For 1937965/1938015 co-relation queries the response was YES. [2024-06-04 15:00:11,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100015 conditions, 9040 events. 6107/9040 cut-off events. For 1937965/1938015 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 51129 event pairs, 1185 based on Foata normal form. 62/9102 useless extension candidates. Maximal degree in co-relation 99773. Up to 6950 conditions per place. [2024-06-04 15:00:11,476 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 862 selfloop transitions, 249 changer transitions 0/1114 dead transitions. [2024-06-04 15:00:11,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1114 transitions, 22497 flow [2024-06-04 15:00:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:00:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:00:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 15:00:11,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-04 15:00:11,478 INFO L175 Difference]: Start difference. First operand has 509 places, 1050 transitions, 19217 flow. Second operand 10 states and 188 transitions. [2024-06-04 15:00:11,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1114 transitions, 22497 flow [2024-06-04 15:00:18,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1114 transitions, 22009 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:00:18,707 INFO L231 Difference]: Finished difference. Result has 513 places, 1050 transitions, 19234 flow [2024-06-04 15:00:18,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18729, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19234, PETRI_PLACES=513, PETRI_TRANSITIONS=1050} [2024-06-04 15:00:18,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-04 15:00:18,708 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1050 transitions, 19234 flow [2024-06-04 15:00:18,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:18,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:18,708 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] [2024-06-04 15:00:18,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 15:00:18,708 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)] === [2024-06-04 15:00:18,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:18,709 INFO L85 PathProgramCache]: Analyzing trace with hash 791884257, now seen corresponding path program 2 times [2024-06-04 15:00:18,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:18,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386074887] [2024-06-04 15:00:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:18,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:19,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:19,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386074887] [2024-06-04 15:00:19,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386074887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:19,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:19,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:00:19,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537687549] [2024-06-04 15:00:19,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:19,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:00:19,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:00:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:00:20,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:20,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1050 transitions, 19234 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-04 15:00:20,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:20,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:20,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:23,526 INFO L124 PetriNetUnfolderBase]: 6331/9352 cut-off events. [2024-06-04 15:00:23,526 INFO L125 PetriNetUnfolderBase]: For 1971846/1971878 co-relation queries the response was YES. [2024-06-04 15:00:23,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103229 conditions, 9352 events. 6331/9352 cut-off events. For 1971846/1971878 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 53205 event pairs, 1291 based on Foata normal form. 36/9388 useless extension candidates. Maximal degree in co-relation 102986. Up to 7955 conditions per place. [2024-06-04 15:00:23,893 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 793 selfloop transitions, 345 changer transitions 0/1141 dead transitions. [2024-06-04 15:00:23,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 1141 transitions, 22931 flow [2024-06-04 15:00:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:00:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:00:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-04 15:00:23,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-04 15:00:23,895 INFO L175 Difference]: Start difference. First operand has 513 places, 1050 transitions, 19234 flow. Second operand 11 states and 206 transitions. [2024-06-04 15:00:23,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 1141 transitions, 22931 flow [2024-06-04 15:00:31,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1141 transitions, 22474 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:00:31,735 INFO L231 Difference]: Finished difference. Result has 523 places, 1104 transitions, 20544 flow [2024-06-04 15:00:31,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18782, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20544, PETRI_PLACES=523, PETRI_TRANSITIONS=1104} [2024-06-04 15:00:31,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 480 predicate places. [2024-06-04 15:00:31,736 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1104 transitions, 20544 flow [2024-06-04 15:00:31,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-04 15:00:31,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:31,736 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] [2024-06-04 15:00:31,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 15:00:31,736 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)] === [2024-06-04 15:00:31,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1479263154, now seen corresponding path program 6 times [2024-06-04 15:00:31,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:31,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176076886] [2024-06-04 15:00:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:31,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:32,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:32,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176076886] [2024-06-04 15:00:32,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176076886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:32,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:32,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:00:32,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277117809] [2024-06-04 15:00:32,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:32,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:00:32,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:00:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:00:32,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:32,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1104 transitions, 20544 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-04 15:00:32,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:32,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:32,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:36,597 INFO L124 PetriNetUnfolderBase]: 6435/9512 cut-off events. [2024-06-04 15:00:36,598 INFO L125 PetriNetUnfolderBase]: For 2201511/2201547 co-relation queries the response was YES. [2024-06-04 15:00:36,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105926 conditions, 9512 events. 6435/9512 cut-off events. For 2201511/2201547 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 54279 event pairs, 1299 based on Foata normal form. 64/9576 useless extension candidates. Maximal degree in co-relation 105677. Up to 8428 conditions per place. [2024-06-04 15:00:37,035 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 875 selfloop transitions, 278 changer transitions 0/1156 dead transitions. [2024-06-04 15:00:37,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 1156 transitions, 23471 flow [2024-06-04 15:00:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:00:37,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:00:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 235 transitions. [2024-06-04 15:00:37,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43040293040293043 [2024-06-04 15:00:37,037 INFO L175 Difference]: Start difference. First operand has 523 places, 1104 transitions, 20544 flow. Second operand 13 states and 235 transitions. [2024-06-04 15:00:37,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 1156 transitions, 23471 flow [2024-06-04 15:00:44,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1156 transitions, 23315 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:44,385 INFO L231 Difference]: Finished difference. Result has 533 places, 1110 transitions, 21134 flow [2024-06-04 15:00:44,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20388, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=21134, PETRI_PLACES=533, PETRI_TRANSITIONS=1110} [2024-06-04 15:00:44,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 490 predicate places. [2024-06-04 15:00:44,386 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1110 transitions, 21134 flow [2024-06-04 15:00:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-04 15:00:44,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:44,386 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] [2024-06-04 15:00:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 15:00:44,387 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)] === [2024-06-04 15:00:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1479272454, now seen corresponding path program 7 times [2024-06-04 15:00:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:44,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159786293] [2024-06-04 15:00:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:44,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:45,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:45,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159786293] [2024-06-04 15:00:45,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159786293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:45,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:45,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:00:45,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598952736] [2024-06-04 15:00:45,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:45,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:00:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:00:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:00:45,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:45,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1110 transitions, 21134 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-04 15:00:45,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:45,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:45,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand