./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix016_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix016_power.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix016_power.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:57:41,715 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:57:41,785 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:57:41,789 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:57:41,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:57:41,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:57:41,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:57:41,815 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:57:41,815 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:57:41,819 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:57:41,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:57:41,820 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:57:41,820 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:57:41,821 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:57:41,822 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:57:41,822 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:57:41,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:57:41,822 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:57:41,823 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:57:41,823 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:57:41,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:57:41,824 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:57:41,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:57:41,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:57:41,825 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:57:41,825 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:57:41,825 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:57:41,825 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:57:41,826 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:57:41,826 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:57:41,827 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:57:41,827 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:57:41,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:57:41,828 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:57:41,828 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:57:41,828 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:57:41,828 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:57:41,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:57:41,829 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:57:41,829 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:57:41,829 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:57:41,830 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:57:41,830 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:57:41,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:57:42,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:57:42,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:57:42,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:57:42,085 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:57:42,086 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:57:42,087 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-06-20 15:57:43,148 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:57:43,364 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:57:43,364 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-06-20 15:57:43,379 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f1f0f70/160e371edd474b34a28ffa41c2a4ff4e/FLAGa40f04a2e [2024-06-20 15:57:43,394 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f1f0f70/160e371edd474b34a28ffa41c2a4ff4e [2024-06-20 15:57:43,397 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:57:43,397 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:57:43,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix016_power.opt_rmo.opt.yml/witness.yml [2024-06-20 15:57:43,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:57:43,568 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:57:43,569 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:57:43,569 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:57:43,573 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:57:43,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:57:43" (1/2) ... [2024-06-20 15:57:43,575 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e18bfd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:57:43, skipping insertion in model container [2024-06-20 15:57:43,575 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:57:43" (1/2) ... [2024-06-20 15:57:43,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@626626c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:57:43, skipping insertion in model container [2024-06-20 15:57:43,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:57:43" (2/2) ... [2024-06-20 15:57:43,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e18bfd1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:43, skipping insertion in model container [2024-06-20 15:57:43,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:57:43" (2/2) ... [2024-06-20 15:57:43,577 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:57:43,717 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:57:43,718 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-20 15:57:43,719 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-20 15:57:43,719 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-20 15:57:43,719 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:57:43,719 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-20 15:57:43,764 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:57:44,082 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:57:44,095 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:57:44,251 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:57:44,297 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:57:44,297 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44 WrapperNode [2024-06-20 15:57:44,298 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:57:44,299 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:57:44,299 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:57:44,299 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:57:44,306 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 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,342 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 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,371 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-20 15:57:44,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:57:44,372 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:57:44,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:57:44,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:57:44,383 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,386 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,401 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]. [2024-06-20 15:57:44,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,402 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,436 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:57:44,440 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:57:44,440 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:57:44,441 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:57:44,441 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (1/1) ... [2024-06-20 15:57:44,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:57:44,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:57:44,489 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) [2024-06-20 15:57:44,511 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 [2024-06-20 15:57:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:57:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:57:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:57:44,529 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:57:44,530 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:57:44,530 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:57:44,530 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:57:44,530 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:57:44,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:57:44,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:57:44,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:57:44,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:57:44,532 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:57:44,641 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:57:44,642 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:57:45,004 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:57:45,006 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:57:45,170 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:57:45,170 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:57:45,171 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:57:45 BoogieIcfgContainer [2024-06-20 15:57:45,171 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:57:45,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:57:45,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:57:45,177 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:57:45,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:57:43" (1/4) ... [2024-06-20 15:57:45,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccfa6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:57:45, skipping insertion in model container [2024-06-20 15:57:45,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:57:43" (2/4) ... [2024-06-20 15:57:45,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccfa6b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:57:45, skipping insertion in model container [2024-06-20 15:57:45,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:57:44" (3/4) ... [2024-06-20 15:57:45,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccfa6b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:57:45, skipping insertion in model container [2024-06-20 15:57:45,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:57:45" (4/4) ... [2024-06-20 15:57:45,181 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016_power.opt_rmo.opt.i [2024-06-20 15:57:45,197 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:57:45,197 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:57:45,198 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:57:45,246 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:57:45,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:57:45,311 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 15:57:45,312 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:57:45,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:57:45,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:57:45,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 15:57:45,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:57:45,336 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;@54dbc282, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:57:45,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:57:45,339 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:57:45,339 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:57:45,339 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:57:45,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:45,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:57:45,340 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)] === [2024-06-20 15:57:45,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash 365436942, now seen corresponding path program 1 times [2024-06-20 15:57:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:45,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342414322] [2024-06-20 15:57:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:46,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:46,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342414322] [2024-06-20 15:57:46,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342414322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:46,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:46,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:57:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002783474] [2024-06-20 15:57:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:46,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:57:46,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:57:46,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:57:46,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-20 15:57:46,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:46,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:46,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-20 15:57:46,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:46,910 INFO L124 PetriNetUnfolderBase]: 946/1551 cut-off events. [2024-06-20 15:57:46,911 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 15:57:46,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3057 conditions, 1551 events. 946/1551 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7745 event pairs, 638 based on Foata normal form. 1/1490 useless extension candidates. Maximal degree in co-relation 3045. Up to 1431 conditions per place. [2024-06-20 15:57:46,925 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 15:57:46,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-20 15:57:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:57:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:57:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-20 15:57:46,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-20 15:57:46,937 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 79 transitions. [2024-06-20 15:57:46,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-20 15:57:46,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:57:46,942 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 15:57:46,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 15:57:46,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 15:57:46,946 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 15:57:46,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:46,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:46,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:46,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:57:46,947 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)] === [2024-06-20 15:57:46,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1002400659, now seen corresponding path program 1 times [2024-06-20 15:57:46,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:46,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198740426] [2024-06-20 15:57:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:47,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198740426] [2024-06-20 15:57:47,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198740426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:47,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:47,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:57:47,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941059155] [2024-06-20 15:57:47,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:47,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:57:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:57:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:57:47,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 15:57:47,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:47,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:47,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 15:57:47,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:47,993 INFO L124 PetriNetUnfolderBase]: 1104/1745 cut-off events. [2024-06-20 15:57:47,993 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2024-06-20 15:57:47,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 1745 events. 1104/1745 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8495 event pairs, 517 based on Foata normal form. 6/1748 useless extension candidates. Maximal degree in co-relation 3939. Up to 1628 conditions per place. [2024-06-20 15:57:48,005 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 15:57:48,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 240 flow [2024-06-20 15:57:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:57:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:57:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-20 15:57:48,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:57:48,008 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-20 15:57:48,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 240 flow [2024-06-20 15:57:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:57:48,010 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-20 15:57:48,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 15:57:48,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-20 15:57:48,011 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-20 15:57:48,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:48,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:48,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:48,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:57:48,012 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)] === [2024-06-20 15:57:48,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash 390145838, now seen corresponding path program 1 times [2024-06-20 15:57:48,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:48,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208545812] [2024-06-20 15:57:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:48,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:49,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:49,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208545812] [2024-06-20 15:57:49,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208545812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:49,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:49,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:57:49,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49782963] [2024-06-20 15:57:49,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:49,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:57:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:57:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:57:49,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 15:57:49,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:49,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:49,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 15:57:49,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:49,849 INFO L124 PetriNetUnfolderBase]: 1095/1728 cut-off events. [2024-06-20 15:57:49,849 INFO L125 PetriNetUnfolderBase]: For 953/953 co-relation queries the response was YES. [2024-06-20 15:57:49,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4370 conditions, 1728 events. 1095/1728 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8356 event pairs, 375 based on Foata normal form. 6/1731 useless extension candidates. Maximal degree in co-relation 4356. Up to 1583 conditions per place. [2024-06-20 15:57:49,860 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 49 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-20 15:57:49,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 346 flow [2024-06-20 15:57:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:57:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:57:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 15:57:49,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-20 15:57:49,863 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 142 transitions. [2024-06-20 15:57:49,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 346 flow [2024-06-20 15:57:49,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 326 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:57:49,866 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-20 15:57:49,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-20 15:57:49,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-20 15:57:49,867 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-20 15:57:49,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:49,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:49,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:49,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:57:49,868 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:49,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 292940758, now seen corresponding path program 1 times [2024-06-20 15:57:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:49,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461132080] [2024-06-20 15:57:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:49,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:50,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461132080] [2024-06-20 15:57:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461132080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:57:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792307618] [2024-06-20 15:57:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:57:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:57:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:57:50,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 15:57:50,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-20 15:57:50,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:50,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 15:57:50,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:51,139 INFO L124 PetriNetUnfolderBase]: 920/1574 cut-off events. [2024-06-20 15:57:51,139 INFO L125 PetriNetUnfolderBase]: For 1518/1518 co-relation queries the response was YES. [2024-06-20 15:57:51,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4239 conditions, 1574 events. 920/1574 cut-off events. For 1518/1518 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8095 event pairs, 378 based on Foata normal form. 2/1567 useless extension candidates. Maximal degree in co-relation 4222. Up to 1382 conditions per place. [2024-06-20 15:57:51,171 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-20 15:57:51,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 319 flow [2024-06-20 15:57:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:57:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:57:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-20 15:57:51,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-20 15:57:51,173 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 103 transitions. [2024-06-20 15:57:51,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 319 flow [2024-06-20 15:57:51,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 292 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:57:51,177 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-20 15:57:51,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-20 15:57:51,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-20 15:57:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-20 15:57:51,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-20 15:57:51,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:51,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:51,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:57:51,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:57:51,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1957448587, now seen corresponding path program 1 times [2024-06-20 15:57:51,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:51,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130189182] [2024-06-20 15:57:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:51,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:52,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130189182] [2024-06-20 15:57:52,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130189182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:52,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:52,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:57:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774280751] [2024-06-20 15:57:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:52,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:57:52,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:57:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:57:52,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:57:52,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 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) [2024-06-20 15:57:52,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:52,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:57:52,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:52,648 INFO L124 PetriNetUnfolderBase]: 1112/1777 cut-off events. [2024-06-20 15:57:52,648 INFO L125 PetriNetUnfolderBase]: For 2711/2711 co-relation queries the response was YES. [2024-06-20 15:57:52,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5313 conditions, 1777 events. 1112/1777 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8692 event pairs, 448 based on Foata normal form. 4/1778 useless extension candidates. Maximal degree in co-relation 5294. Up to 1635 conditions per place. [2024-06-20 15:57:52,662 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 50 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-20 15:57:52,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 386 flow [2024-06-20 15:57:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:57:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:57:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 15:57:52,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-20 15:57:52,665 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 6 states and 121 transitions. [2024-06-20 15:57:52,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 386 flow [2024-06-20 15:57:52,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 366 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:57:52,669 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 230 flow [2024-06-20 15:57:52,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-20 15:57:52,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-20 15:57:52,670 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 230 flow [2024-06-20 15:57:52,670 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) [2024-06-20 15:57:52,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:52,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:52,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:57:52,671 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)] === [2024-06-20 15:57:52,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1951734667, now seen corresponding path program 2 times [2024-06-20 15:57:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:52,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815864013] [2024-06-20 15:57:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:52,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:53,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:53,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815864013] [2024-06-20 15:57:53,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815864013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:53,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:53,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:57:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341211739] [2024-06-20 15:57:53,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:53,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:57:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:57:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:57:53,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:57:53,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 230 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) [2024-06-20 15:57:53,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:53,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:57:53,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:54,058 INFO L124 PetriNetUnfolderBase]: 1118/1802 cut-off events. [2024-06-20 15:57:54,059 INFO L125 PetriNetUnfolderBase]: For 3962/3968 co-relation queries the response was YES. [2024-06-20 15:57:54,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5820 conditions, 1802 events. 1118/1802 cut-off events. For 3962/3968 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8972 event pairs, 449 based on Foata normal form. 8/1805 useless extension candidates. Maximal degree in co-relation 5800. Up to 1617 conditions per place. [2024-06-20 15:57:54,072 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 46 selfloop transitions, 16 changer transitions 0/68 dead transitions. [2024-06-20 15:57:54,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 424 flow [2024-06-20 15:57:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:57:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:57:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 15:57:54,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-20 15:57:54,075 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 230 flow. Second operand 6 states and 121 transitions. [2024-06-20 15:57:54,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 424 flow [2024-06-20 15:57:54,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 394 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:57:54,082 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 270 flow [2024-06-20 15:57:54,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-20 15:57:54,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-20 15:57:54,085 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 270 flow [2024-06-20 15:57:54,086 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) [2024-06-20 15:57:54,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:54,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:54,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:57:54,087 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)] === [2024-06-20 15:57:54,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:54,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1951726731, now seen corresponding path program 1 times [2024-06-20 15:57:54,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:54,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683214507] [2024-06-20 15:57:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:55,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683214507] [2024-06-20 15:57:55,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683214507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:55,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:55,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:57:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978950714] [2024-06-20 15:57:55,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:55,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:57:55,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:57:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:57:55,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:57:55,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:55,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:55,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:57:55,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:55,812 INFO L124 PetriNetUnfolderBase]: 1172/1960 cut-off events. [2024-06-20 15:57:55,812 INFO L125 PetriNetUnfolderBase]: For 5273/5273 co-relation queries the response was YES. [2024-06-20 15:57:55,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6549 conditions, 1960 events. 1172/1960 cut-off events. For 5273/5273 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10141 event pairs, 444 based on Foata normal form. 2/1949 useless extension candidates. Maximal degree in co-relation 6528. Up to 1733 conditions per place. [2024-06-20 15:57:55,828 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 14 changer transitions 0/76 dead transitions. [2024-06-20 15:57:55,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 495 flow [2024-06-20 15:57:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:57:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:57:55,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 15:57:55,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 15:57:55,830 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 270 flow. Second operand 7 states and 135 transitions. [2024-06-20 15:57:55,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 495 flow [2024-06-20 15:57:55,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 446 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:57:55,838 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 306 flow [2024-06-20 15:57:55,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-20 15:57:55,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-20 15:57:55,840 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 306 flow [2024-06-20 15:57:55,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:55,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:55,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:55,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:57:55,841 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)] === [2024-06-20 15:57:55,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:55,841 INFO L85 PathProgramCache]: Analyzing trace with hash -392516947, now seen corresponding path program 1 times [2024-06-20 15:57:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:55,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454925140] [2024-06-20 15:57:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:55,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:57,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:57,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454925140] [2024-06-20 15:57:57,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454925140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:57,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:57,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:57:57,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601244227] [2024-06-20 15:57:57,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:57,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:57:57,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:57:57,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:57:57,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:57:57,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:57,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:57,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:57:57,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:57,854 INFO L124 PetriNetUnfolderBase]: 1272/2034 cut-off events. [2024-06-20 15:57:57,854 INFO L125 PetriNetUnfolderBase]: For 7532/7532 co-relation queries the response was YES. [2024-06-20 15:57:57,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 2034 events. 1272/2034 cut-off events. For 7532/7532 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10256 event pairs, 478 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 7489. Up to 1861 conditions per place. [2024-06-20 15:57:57,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 64 selfloop transitions, 14 changer transitions 0/85 dead transitions. [2024-06-20 15:57:57,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 558 flow [2024-06-20 15:57:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:57:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:57:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-20 15:57:57,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-20 15:57:57,883 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 306 flow. Second operand 7 states and 141 transitions. [2024-06-20 15:57:57,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 558 flow [2024-06-20 15:57:57,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 520 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:57:57,893 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 342 flow [2024-06-20 15:57:57,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-20 15:57:57,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-20 15:57:57,896 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 342 flow [2024-06-20 15:57:57,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:57,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:57,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:57,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:57:57,897 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)] === [2024-06-20 15:57:57,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash -373985007, now seen corresponding path program 1 times [2024-06-20 15:57:57,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:57,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607477060] [2024-06-20 15:57:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:57,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:57:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:57:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:57:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607477060] [2024-06-20 15:57:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607477060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:57:59,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:57:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:57:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296562526] [2024-06-20 15:57:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:57:59,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:57:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:57:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:57:59,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:57:59,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:57:59,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 342 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:59,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:57:59,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:57:59,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:57:59,928 INFO L124 PetriNetUnfolderBase]: 1154/1926 cut-off events. [2024-06-20 15:57:59,928 INFO L125 PetriNetUnfolderBase]: For 8221/8221 co-relation queries the response was YES. [2024-06-20 15:57:59,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7170 conditions, 1926 events. 1154/1926 cut-off events. For 8221/8221 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9876 event pairs, 415 based on Foata normal form. 4/1913 useless extension candidates. Maximal degree in co-relation 7146. Up to 1689 conditions per place. [2024-06-20 15:57:59,942 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 64 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-20 15:57:59,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 588 flow [2024-06-20 15:57:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:57:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:57:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 15:57:59,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 15:57:59,944 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 342 flow. Second operand 8 states and 153 transitions. [2024-06-20 15:57:59,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 588 flow [2024-06-20 15:57:59,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 538 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:57:59,952 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 361 flow [2024-06-20 15:57:59,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-20 15:57:59,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-20 15:57:59,954 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 361 flow [2024-06-20 15:57:59,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:57:59,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:57:59,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:57:59,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:57:59,954 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)] === [2024-06-20 15:57:59,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:57:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1304265577, now seen corresponding path program 1 times [2024-06-20 15:57:59,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:57:59,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208965179] [2024-06-20 15:57:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:57:59,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:57:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:00,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208965179] [2024-06-20 15:58:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208965179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:00,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:00,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597700557] [2024-06-20 15:58:00,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:00,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:00,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:00,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:00,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:00,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:00,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:01,469 INFO L124 PetriNetUnfolderBase]: 1358/2143 cut-off events. [2024-06-20 15:58:01,469 INFO L125 PetriNetUnfolderBase]: For 11520/11520 co-relation queries the response was YES. [2024-06-20 15:58:01,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8451 conditions, 2143 events. 1358/2143 cut-off events. For 11520/11520 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10501 event pairs, 514 based on Foata normal form. 1/2141 useless extension candidates. Maximal degree in co-relation 8426. Up to 2024 conditions per place. [2024-06-20 15:58:01,484 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 59 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-20 15:58:01,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 74 transitions, 548 flow [2024-06-20 15:58:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 15:58:01,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 15:58:01,486 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 361 flow. Second operand 6 states and 102 transitions. [2024-06-20 15:58:01,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 74 transitions, 548 flow [2024-06-20 15:58:01,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 495 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:01,502 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 376 flow [2024-06-20 15:58:01,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-20 15:58:01,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-20 15:58:01,503 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 376 flow [2024-06-20 15:58:01,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:01,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:01,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:01,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:58:01,504 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)] === [2024-06-20 15:58:01,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash 720602846, now seen corresponding path program 1 times [2024-06-20 15:58:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:01,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640342972] [2024-06-20 15:58:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:01,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:02,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:02,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640342972] [2024-06-20 15:58:02,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640342972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:02,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:02,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:02,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439116645] [2024-06-20 15:58:02,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:02,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:02,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:02,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:02,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 376 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:02,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:02,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:02,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:03,402 INFO L124 PetriNetUnfolderBase]: 1449/2253 cut-off events. [2024-06-20 15:58:03,403 INFO L125 PetriNetUnfolderBase]: For 15724/15724 co-relation queries the response was YES. [2024-06-20 15:58:03,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9497 conditions, 2253 events. 1449/2253 cut-off events. For 15724/15724 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11043 event pairs, 514 based on Foata normal form. 2/2252 useless extension candidates. Maximal degree in co-relation 9470. Up to 2082 conditions per place. [2024-06-20 15:58:03,422 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 77 selfloop transitions, 18 changer transitions 0/101 dead transitions. [2024-06-20 15:58:03,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 684 flow [2024-06-20 15:58:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:58:03,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 15:58:03,425 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 376 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:58:03,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 684 flow [2024-06-20 15:58:03,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 656 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:03,437 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 464 flow [2024-06-20 15:58:03,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=464, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-20 15:58:03,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-20 15:58:03,438 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 464 flow [2024-06-20 15:58:03,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:03,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:03,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:03,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:58:03,439 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)] === [2024-06-20 15:58:03,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1283739732, now seen corresponding path program 2 times [2024-06-20 15:58:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:03,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944568309] [2024-06-20 15:58:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:03,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:04,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:04,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944568309] [2024-06-20 15:58:04,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944568309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:04,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:04,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:04,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899198385] [2024-06-20 15:58:04,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:04,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:04,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:04,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:04,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 464 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:04,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:04,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:04,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:05,307 INFO L124 PetriNetUnfolderBase]: 1471/2277 cut-off events. [2024-06-20 15:58:05,308 INFO L125 PetriNetUnfolderBase]: For 18716/18722 co-relation queries the response was YES. [2024-06-20 15:58:05,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10296 conditions, 2277 events. 1471/2277 cut-off events. For 18716/18722 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11003 event pairs, 515 based on Foata normal form. 6/2278 useless extension candidates. Maximal degree in co-relation 10266. Up to 2069 conditions per place. [2024-06-20 15:58:05,326 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 76 selfloop transitions, 27 changer transitions 0/109 dead transitions. [2024-06-20 15:58:05,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 798 flow [2024-06-20 15:58:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:58:05,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 15:58:05,329 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 464 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:58:05,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 798 flow [2024-06-20 15:58:05,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 109 transitions, 745 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:05,347 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 559 flow [2024-06-20 15:58:05,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=559, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2024-06-20 15:58:05,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-20 15:58:05,348 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 559 flow [2024-06-20 15:58:05,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:05,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:05,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:05,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:58:05,349 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:05,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:05,350 INFO L85 PathProgramCache]: Analyzing trace with hash 864702626, now seen corresponding path program 3 times [2024-06-20 15:58:05,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:05,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603261276] [2024-06-20 15:58:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:05,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603261276] [2024-06-20 15:58:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603261276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:06,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380886860] [2024-06-20 15:58:06,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:06,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:06,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:06,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:06,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 559 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:06,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:06,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:06,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:07,327 INFO L124 PetriNetUnfolderBase]: 1504/2334 cut-off events. [2024-06-20 15:58:07,327 INFO L125 PetriNetUnfolderBase]: For 22189/22192 co-relation queries the response was YES. [2024-06-20 15:58:07,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11084 conditions, 2334 events. 1504/2334 cut-off events. For 22189/22192 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11417 event pairs, 515 based on Foata normal form. 6/2336 useless extension candidates. Maximal degree in co-relation 11052. Up to 2005 conditions per place. [2024-06-20 15:58:07,345 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 74 selfloop transitions, 52 changer transitions 0/132 dead transitions. [2024-06-20 15:58:07,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 132 transitions, 1079 flow [2024-06-20 15:58:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 15:58:07,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 15:58:07,347 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 559 flow. Second operand 9 states and 174 transitions. [2024-06-20 15:58:07,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 132 transitions, 1079 flow [2024-06-20 15:58:07,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 132 transitions, 1023 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:58:07,362 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 784 flow [2024-06-20 15:58:07,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=784, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-06-20 15:58:07,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-20 15:58:07,363 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 784 flow [2024-06-20 15:58:07,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:07,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:07,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:07,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:58:07,364 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:07,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525919, now seen corresponding path program 1 times [2024-06-20 15:58:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:07,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106203587] [2024-06-20 15:58:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:07,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:08,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106203587] [2024-06-20 15:58:08,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106203587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:08,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:08,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:58:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195611464] [2024-06-20 15:58:08,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:08,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:58:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:58:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:58:08,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:08,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 784 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) [2024-06-20 15:58:08,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:08,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:08,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:08,826 INFO L124 PetriNetUnfolderBase]: 1418/2230 cut-off events. [2024-06-20 15:58:08,826 INFO L125 PetriNetUnfolderBase]: For 21965/21965 co-relation queries the response was YES. [2024-06-20 15:58:08,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11136 conditions, 2230 events. 1418/2230 cut-off events. For 21965/21965 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10883 event pairs, 474 based on Foata normal form. 2/2229 useless extension candidates. Maximal degree in co-relation 11101. Up to 2106 conditions per place. [2024-06-20 15:58:08,843 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2024-06-20 15:58:08,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1048 flow [2024-06-20 15:58:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:58:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:58:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 15:58:08,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-20 15:58:08,845 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 784 flow. Second operand 7 states and 117 transitions. [2024-06-20 15:58:08,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1048 flow [2024-06-20 15:58:08,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 114 transitions, 996 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-20 15:58:08,866 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 794 flow [2024-06-20 15:58:08,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=794, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-20 15:58:08,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 15:58:08,867 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 794 flow [2024-06-20 15:58:08,868 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) [2024-06-20 15:58:08,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:08,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:08,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:58:08,868 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)] === [2024-06-20 15:58:08,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:08,869 INFO L85 PathProgramCache]: Analyzing trace with hash 745520428, now seen corresponding path program 1 times [2024-06-20 15:58:08,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:08,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639619155] [2024-06-20 15:58:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:08,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:10,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639619155] [2024-06-20 15:58:10,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639619155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:10,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513673823] [2024-06-20 15:58:10,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:10,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:10,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 794 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:10,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:10,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:10,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:10,887 INFO L124 PetriNetUnfolderBase]: 1460/2290 cut-off events. [2024-06-20 15:58:10,887 INFO L125 PetriNetUnfolderBase]: For 28018/28018 co-relation queries the response was YES. [2024-06-20 15:58:10,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12149 conditions, 2290 events. 1460/2290 cut-off events. For 28018/28018 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11557 event pairs, 337 based on Foata normal form. 4/2283 useless extension candidates. Maximal degree in co-relation 12112. Up to 2050 conditions per place. [2024-06-20 15:58:10,907 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2024-06-20 15:58:10,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 137 transitions, 1162 flow [2024-06-20 15:58:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 15:58:10,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-20 15:58:10,910 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 794 flow. Second operand 8 states and 159 transitions. [2024-06-20 15:58:10,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 137 transitions, 1162 flow [2024-06-20 15:58:10,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 137 transitions, 1122 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:10,933 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 833 flow [2024-06-20 15:58:10,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=833, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2024-06-20 15:58:10,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-20 15:58:10,934 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 833 flow [2024-06-20 15:58:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:10,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:10,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:58:10,935 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:10,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -400318620, now seen corresponding path program 2 times [2024-06-20 15:58:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744292379] [2024-06-20 15:58:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:10,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:12,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744292379] [2024-06-20 15:58:12,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744292379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:12,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:12,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:12,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99092699] [2024-06-20 15:58:12,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:12,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:12,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:12,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:12,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:12,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:12,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 833 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:12,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:12,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:12,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:12,915 INFO L124 PetriNetUnfolderBase]: 1468/2320 cut-off events. [2024-06-20 15:58:12,915 INFO L125 PetriNetUnfolderBase]: For 31883/31883 co-relation queries the response was YES. [2024-06-20 15:58:12,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12657 conditions, 2320 events. 1468/2320 cut-off events. For 31883/31883 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11824 event pairs, 426 based on Foata normal form. 4/2319 useless extension candidates. Maximal degree in co-relation 12619. Up to 2089 conditions per place. [2024-06-20 15:58:12,932 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-06-20 15:58:12,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1205 flow [2024-06-20 15:58:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 15:58:12,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-20 15:58:12,934 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 833 flow. Second operand 8 states and 159 transitions. [2024-06-20 15:58:12,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1205 flow [2024-06-20 15:58:12,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1144 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:12,961 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 857 flow [2024-06-20 15:58:12,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=857, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2024-06-20 15:58:12,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-20 15:58:12,962 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 857 flow [2024-06-20 15:58:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:12,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:12,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:58:12,963 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)] === [2024-06-20 15:58:12,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1583087026, now seen corresponding path program 1 times [2024-06-20 15:58:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:12,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435104091] [2024-06-20 15:58:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:14,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:14,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435104091] [2024-06-20 15:58:14,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435104091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:14,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:14,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922811323] [2024-06-20 15:58:14,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:14,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:14,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 857 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:14,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:14,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:14,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:15,171 INFO L124 PetriNetUnfolderBase]: 1582/2458 cut-off events. [2024-06-20 15:58:15,171 INFO L125 PetriNetUnfolderBase]: For 36200/36200 co-relation queries the response was YES. [2024-06-20 15:58:15,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13399 conditions, 2458 events. 1582/2458 cut-off events. For 36200/36200 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12064 event pairs, 439 based on Foata normal form. 2/2457 useless extension candidates. Maximal degree in co-relation 13360. Up to 2267 conditions per place. [2024-06-20 15:58:15,186 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 120 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2024-06-20 15:58:15,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 147 transitions, 1296 flow [2024-06-20 15:58:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:58:15,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 15:58:15,188 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 857 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:58:15,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 147 transitions, 1296 flow [2024-06-20 15:58:15,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 1226 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:15,218 INFO L231 Difference]: Finished difference. Result has 100 places, 115 transitions, 920 flow [2024-06-20 15:58:15,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=920, PETRI_PLACES=100, PETRI_TRANSITIONS=115} [2024-06-20 15:58:15,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 15:58:15,219 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 115 transitions, 920 flow [2024-06-20 15:58:15,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:15,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:15,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:15,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:58:15,220 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)] === [2024-06-20 15:58:15,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1578623336, now seen corresponding path program 3 times [2024-06-20 15:58:15,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:15,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987766972] [2024-06-20 15:58:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:15,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:16,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:16,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987766972] [2024-06-20 15:58:16,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987766972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:16,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:16,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:16,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854832825] [2024-06-20 15:58:16,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:16,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:16,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:16,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:16,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 115 transitions, 920 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:16,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:16,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:16,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:17,100 INFO L124 PetriNetUnfolderBase]: 1518/2414 cut-off events. [2024-06-20 15:58:17,100 INFO L125 PetriNetUnfolderBase]: For 41805/41805 co-relation queries the response was YES. [2024-06-20 15:58:17,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13825 conditions, 2414 events. 1518/2414 cut-off events. For 41805/41805 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12325 event pairs, 397 based on Foata normal form. 8/2419 useless extension candidates. Maximal degree in co-relation 13784. Up to 2141 conditions per place. [2024-06-20 15:58:17,115 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 21 changer transitions 0/143 dead transitions. [2024-06-20 15:58:17,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 143 transitions, 1296 flow [2024-06-20 15:58:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:58:17,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 15:58:17,117 INFO L175 Difference]: Start difference. First operand has 100 places, 115 transitions, 920 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:58:17,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 143 transitions, 1296 flow [2024-06-20 15:58:17,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 1210 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:17,149 INFO L231 Difference]: Finished difference. Result has 102 places, 117 transitions, 934 flow [2024-06-20 15:58:17,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=102, PETRI_TRANSITIONS=117} [2024-06-20 15:58:17,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-20 15:58:17,150 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 117 transitions, 934 flow [2024-06-20 15:58:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:17,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:17,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:58:17,151 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)] === [2024-06-20 15:58:17,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1578445396, now seen corresponding path program 2 times [2024-06-20 15:58:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:17,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449433942] [2024-06-20 15:58:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:17,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:18,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:18,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449433942] [2024-06-20 15:58:18,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449433942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:18,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:18,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:18,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601712803] [2024-06-20 15:58:18,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:18,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:18,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:18,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:18,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 117 transitions, 934 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:18,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:18,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:18,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:19,332 INFO L124 PetriNetUnfolderBase]: 1638/2544 cut-off events. [2024-06-20 15:58:19,332 INFO L125 PetriNetUnfolderBase]: For 45849/45849 co-relation queries the response was YES. [2024-06-20 15:58:19,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14665 conditions, 2544 events. 1638/2544 cut-off events. For 45849/45849 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12585 event pairs, 439 based on Foata normal form. 2/2543 useless extension candidates. Maximal degree in co-relation 14623. Up to 2341 conditions per place. [2024-06-20 15:58:19,344 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 121 selfloop transitions, 26 changer transitions 0/153 dead transitions. [2024-06-20 15:58:19,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 153 transitions, 1392 flow [2024-06-20 15:58:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 15:58:19,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 15:58:19,346 INFO L175 Difference]: Start difference. First operand has 102 places, 117 transitions, 934 flow. Second operand 9 states and 168 transitions. [2024-06-20 15:58:19,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 153 transitions, 1392 flow [2024-06-20 15:58:19,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1291 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:19,383 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 995 flow [2024-06-20 15:58:19,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=995, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-20 15:58:19,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-20 15:58:19,384 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 995 flow [2024-06-20 15:58:19,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:19,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:19,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:19,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:58:19,385 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)] === [2024-06-20 15:58:19,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash -395665272, now seen corresponding path program 1 times [2024-06-20 15:58:19,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:19,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085521592] [2024-06-20 15:58:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:19,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:20,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:20,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085521592] [2024-06-20 15:58:20,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085521592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:20,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:20,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039781155] [2024-06-20 15:58:20,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:20,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:20,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:20,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:20,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:20,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 995 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:20,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:20,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:20,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:21,227 INFO L124 PetriNetUnfolderBase]: 1661/2577 cut-off events. [2024-06-20 15:58:21,227 INFO L125 PetriNetUnfolderBase]: For 49590/49590 co-relation queries the response was YES. [2024-06-20 15:58:21,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14930 conditions, 2577 events. 1661/2577 cut-off events. For 49590/49590 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12759 event pairs, 441 based on Foata normal form. 4/2575 useless extension candidates. Maximal degree in co-relation 14887. Up to 2385 conditions per place. [2024-06-20 15:58:21,243 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 130 selfloop transitions, 20 changer transitions 0/156 dead transitions. [2024-06-20 15:58:21,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 156 transitions, 1415 flow [2024-06-20 15:58:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 15:58:21,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 15:58:21,245 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 995 flow. Second operand 9 states and 166 transitions. [2024-06-20 15:58:21,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 156 transitions, 1415 flow [2024-06-20 15:58:21,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 156 transitions, 1343 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:21,276 INFO L231 Difference]: Finished difference. Result has 110 places, 126 transitions, 1016 flow [2024-06-20 15:58:21,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=110, PETRI_TRANSITIONS=126} [2024-06-20 15:58:21,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-20 15:58:21,277 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 126 transitions, 1016 flow [2024-06-20 15:58:21,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:21,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:21,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:21,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:58:21,278 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)] === [2024-06-20 15:58:21,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:21,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1578438886, now seen corresponding path program 3 times [2024-06-20 15:58:21,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:21,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732052655] [2024-06-20 15:58:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:21,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:22,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:22,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732052655] [2024-06-20 15:58:22,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732052655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:22,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:22,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:22,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281406953] [2024-06-20 15:58:22,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:22,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:22,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:22,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:22,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:22,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 126 transitions, 1016 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:22,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:22,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:22,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:23,521 INFO L124 PetriNetUnfolderBase]: 1685/2618 cut-off events. [2024-06-20 15:58:23,521 INFO L125 PetriNetUnfolderBase]: For 54435/54435 co-relation queries the response was YES. [2024-06-20 15:58:23,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15546 conditions, 2618 events. 1685/2618 cut-off events. For 54435/54435 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12983 event pairs, 443 based on Foata normal form. 2/2617 useless extension candidates. Maximal degree in co-relation 15502. Up to 2381 conditions per place. [2024-06-20 15:58:23,537 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 34 changer transitions 0/163 dead transitions. [2024-06-20 15:58:23,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 163 transitions, 1602 flow [2024-06-20 15:58:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 15:58:23,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 15:58:23,539 INFO L175 Difference]: Start difference. First operand has 110 places, 126 transitions, 1016 flow. Second operand 9 states and 171 transitions. [2024-06-20 15:58:23,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 163 transitions, 1602 flow [2024-06-20 15:58:23,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 163 transitions, 1527 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:23,565 INFO L231 Difference]: Finished difference. Result has 113 places, 132 transitions, 1157 flow [2024-06-20 15:58:23,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1157, PETRI_PLACES=113, PETRI_TRANSITIONS=132} [2024-06-20 15:58:23,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-20 15:58:23,566 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 132 transitions, 1157 flow [2024-06-20 15:58:23,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:23,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:23,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:23,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:58:23,567 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:23,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash -395845010, now seen corresponding path program 4 times [2024-06-20 15:58:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:23,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102966596] [2024-06-20 15:58:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:23,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:24,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:24,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102966596] [2024-06-20 15:58:24,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102966596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:24,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149510657] [2024-06-20 15:58:24,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:24,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:25,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:25,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 132 transitions, 1157 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:25,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:25,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:25,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:25,755 INFO L124 PetriNetUnfolderBase]: 1680/2611 cut-off events. [2024-06-20 15:58:25,756 INFO L125 PetriNetUnfolderBase]: For 59638/59638 co-relation queries the response was YES. [2024-06-20 15:58:25,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15952 conditions, 2611 events. 1680/2611 cut-off events. For 59638/59638 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12971 event pairs, 443 based on Foata normal form. 2/2610 useless extension candidates. Maximal degree in co-relation 15906. Up to 2403 conditions per place. [2024-06-20 15:58:25,773 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 26 changer transitions 0/161 dead transitions. [2024-06-20 15:58:25,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 161 transitions, 1543 flow [2024-06-20 15:58:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 15:58:25,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 15:58:25,774 INFO L175 Difference]: Start difference. First operand has 113 places, 132 transitions, 1157 flow. Second operand 9 states and 168 transitions. [2024-06-20 15:58:25,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 161 transitions, 1543 flow [2024-06-20 15:58:25,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1403 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:25,831 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 1077 flow [2024-06-20 15:58:25,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1077, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2024-06-20 15:58:25,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-20 15:58:25,832 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 1077 flow [2024-06-20 15:58:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:25,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:25,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:25,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:58:25,833 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)] === [2024-06-20 15:58:25,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2033235004, now seen corresponding path program 1 times [2024-06-20 15:58:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144044050] [2024-06-20 15:58:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:25,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:26,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:26,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144044050] [2024-06-20 15:58:26,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144044050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:26,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:26,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:26,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051521066] [2024-06-20 15:58:26,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:26,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:26,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:26,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:26,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 15:58:26,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 1077 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:26,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:26,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 15:58:26,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:27,126 INFO L124 PetriNetUnfolderBase]: 1806/2743 cut-off events. [2024-06-20 15:58:27,126 INFO L125 PetriNetUnfolderBase]: For 63885/63885 co-relation queries the response was YES. [2024-06-20 15:58:27,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16738 conditions, 2743 events. 1806/2743 cut-off events. For 63885/63885 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13245 event pairs, 481 based on Foata normal form. 2/2742 useless extension candidates. Maximal degree in co-relation 16691. Up to 2641 conditions per place. [2024-06-20 15:58:27,142 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 132 selfloop transitions, 19 changer transitions 0/155 dead transitions. [2024-06-20 15:58:27,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 155 transitions, 1547 flow [2024-06-20 15:58:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 15:58:27,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 15:58:27,145 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 1077 flow. Second operand 6 states and 111 transitions. [2024-06-20 15:58:27,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 155 transitions, 1547 flow [2024-06-20 15:58:27,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 155 transitions, 1465 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 15:58:27,188 INFO L231 Difference]: Finished difference. Result has 113 places, 138 transitions, 1110 flow [2024-06-20 15:58:27,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1110, PETRI_PLACES=113, PETRI_TRANSITIONS=138} [2024-06-20 15:58:27,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-20 15:58:27,189 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 138 transitions, 1110 flow [2024-06-20 15:58:27,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:27,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:27,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:27,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:58:27,190 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:27,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:27,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1487538224, now seen corresponding path program 4 times [2024-06-20 15:58:27,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:27,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832974068] [2024-06-20 15:58:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:27,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832974068] [2024-06-20 15:58:28,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832974068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:28,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:28,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:58:28,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503391446] [2024-06-20 15:58:28,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:28,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:58:28,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:58:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:58:28,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 15:58:28,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 138 transitions, 1110 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:28,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:28,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 15:58:28,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:28,993 INFO L124 PetriNetUnfolderBase]: 1582/2507 cut-off events. [2024-06-20 15:58:28,993 INFO L125 PetriNetUnfolderBase]: For 68591/68594 co-relation queries the response was YES. [2024-06-20 15:58:29,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15959 conditions, 2507 events. 1582/2507 cut-off events. For 68591/68594 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12910 event pairs, 416 based on Foata normal form. 10/2508 useless extension candidates. Maximal degree in co-relation 15912. Up to 2171 conditions per place. [2024-06-20 15:58:29,009 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 40 changer transitions 0/164 dead transitions. [2024-06-20 15:58:29,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 164 transitions, 1524 flow [2024-06-20 15:58:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:58:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:58:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:58:29,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 15:58:29,010 INFO L175 Difference]: Start difference. First operand has 113 places, 138 transitions, 1110 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:58:29,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 164 transitions, 1524 flow [2024-06-20 15:58:29,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 1489 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 15:58:29,058 INFO L231 Difference]: Finished difference. Result has 119 places, 140 transitions, 1222 flow [2024-06-20 15:58:29,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1222, PETRI_PLACES=119, PETRI_TRANSITIONS=140} [2024-06-20 15:58:29,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-20 15:58:29,059 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 140 transitions, 1222 flow [2024-06-20 15:58:29,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:29,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:29,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:29,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:58:29,060 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:29,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1377411268, now seen corresponding path program 2 times [2024-06-20 15:58:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:29,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000563273] [2024-06-20 15:58:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:29,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:30,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:30,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000563273] [2024-06-20 15:58:30,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000563273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:30,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:30,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645878241] [2024-06-20 15:58:30,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:30,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:30,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:30,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 140 transitions, 1222 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:30,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:30,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:30,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:30,785 INFO L124 PetriNetUnfolderBase]: 1823/2845 cut-off events. [2024-06-20 15:58:30,785 INFO L125 PetriNetUnfolderBase]: For 82192/82198 co-relation queries the response was YES. [2024-06-20 15:58:30,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18531 conditions, 2845 events. 1823/2845 cut-off events. For 82192/82198 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14554 event pairs, 448 based on Foata normal form. 8/2848 useless extension candidates. Maximal degree in co-relation 18482. Up to 2163 conditions per place. [2024-06-20 15:58:30,803 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 70 changer transitions 0/185 dead transitions. [2024-06-20 15:58:30,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 185 transitions, 2047 flow [2024-06-20 15:58:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 15:58:30,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-20 15:58:30,805 INFO L175 Difference]: Start difference. First operand has 119 places, 140 transitions, 1222 flow. Second operand 9 states and 179 transitions. [2024-06-20 15:58:30,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 185 transitions, 2047 flow [2024-06-20 15:58:30,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 185 transitions, 1854 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:30,869 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1368 flow [2024-06-20 15:58:30,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1368, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-06-20 15:58:30,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-20 15:58:30,870 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1368 flow [2024-06-20 15:58:30,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:30,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:30,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:30,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:58:30,871 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)] === [2024-06-20 15:58:30,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1141227538, now seen corresponding path program 3 times [2024-06-20 15:58:30,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:30,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078122226] [2024-06-20 15:58:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:30,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:31,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:31,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078122226] [2024-06-20 15:58:31,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078122226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:31,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:31,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:31,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382277314] [2024-06-20 15:58:31,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:31,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:31,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:31,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:31,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:32,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:32,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1368 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:32,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:32,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:32,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:32,593 INFO L124 PetriNetUnfolderBase]: 1840/2867 cut-off events. [2024-06-20 15:58:32,594 INFO L125 PetriNetUnfolderBase]: For 86930/86936 co-relation queries the response was YES. [2024-06-20 15:58:32,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18987 conditions, 2867 events. 1840/2867 cut-off events. For 86930/86936 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14601 event pairs, 480 based on Foata normal form. 8/2870 useless extension candidates. Maximal degree in co-relation 18936. Up to 2617 conditions per place. [2024-06-20 15:58:32,612 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 138 selfloop transitions, 30 changer transitions 0/176 dead transitions. [2024-06-20 15:58:32,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 176 transitions, 1832 flow [2024-06-20 15:58:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 15:58:32,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 15:58:32,614 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1368 flow. Second operand 9 states and 167 transitions. [2024-06-20 15:58:32,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 176 transitions, 1832 flow [2024-06-20 15:58:32,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 176 transitions, 1665 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:32,704 INFO L231 Difference]: Finished difference. Result has 125 places, 148 transitions, 1328 flow [2024-06-20 15:58:32,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1328, PETRI_PLACES=125, PETRI_TRANSITIONS=148} [2024-06-20 15:58:32,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-20 15:58:32,705 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 148 transitions, 1328 flow [2024-06-20 15:58:32,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:32,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:32,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:32,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:58:32,705 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:32,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:32,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1377402650, now seen corresponding path program 5 times [2024-06-20 15:58:32,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:32,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767810155] [2024-06-20 15:58:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:32,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:33,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767810155] [2024-06-20 15:58:33,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767810155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:33,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:33,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:33,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145879220] [2024-06-20 15:58:33,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:33,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:33,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:33,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:33,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 148 transitions, 1328 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:33,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:33,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:33,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:34,467 INFO L124 PetriNetUnfolderBase]: 1862/2906 cut-off events. [2024-06-20 15:58:34,467 INFO L125 PetriNetUnfolderBase]: For 92400/92403 co-relation queries the response was YES. [2024-06-20 15:58:34,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19048 conditions, 2906 events. 1862/2906 cut-off events. For 92400/92403 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14872 event pairs, 486 based on Foata normal form. 2/2901 useless extension candidates. Maximal degree in co-relation 18997. Up to 2458 conditions per place. [2024-06-20 15:58:34,487 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 98 selfloop transitions, 81 changer transitions 0/187 dead transitions. [2024-06-20 15:58:34,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 187 transitions, 2032 flow [2024-06-20 15:58:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 15:58:34,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 15:58:34,489 INFO L175 Difference]: Start difference. First operand has 125 places, 148 transitions, 1328 flow. Second operand 9 states and 173 transitions. [2024-06-20 15:58:34,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 187 transitions, 2032 flow [2024-06-20 15:58:34,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 187 transitions, 1931 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:34,561 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 1578 flow [2024-06-20 15:58:34,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1578, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-06-20 15:58:34,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-20 15:58:34,562 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 1578 flow [2024-06-20 15:58:34,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:34,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:34,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:34,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:58:34,563 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:34,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1141220780, now seen corresponding path program 6 times [2024-06-20 15:58:34,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:34,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121051564] [2024-06-20 15:58:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:34,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:35,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:35,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121051564] [2024-06-20 15:58:35,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121051564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:35,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:35,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:35,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768594329] [2024-06-20 15:58:35,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:35,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:35,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:36,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 1578 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:36,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:36,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:36,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:36,567 INFO L124 PetriNetUnfolderBase]: 1884/2941 cut-off events. [2024-06-20 15:58:36,568 INFO L125 PetriNetUnfolderBase]: For 99690/99696 co-relation queries the response was YES. [2024-06-20 15:58:36,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19906 conditions, 2941 events. 1884/2941 cut-off events. For 99690/99696 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15131 event pairs, 475 based on Foata normal form. 6/2942 useless extension candidates. Maximal degree in co-relation 19853. Up to 2636 conditions per place. [2024-06-20 15:58:36,586 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 137 selfloop transitions, 45 changer transitions 0/190 dead transitions. [2024-06-20 15:58:36,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 190 transitions, 2112 flow [2024-06-20 15:58:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 15:58:36,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 15:58:36,588 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 1578 flow. Second operand 9 states and 170 transitions. [2024-06-20 15:58:36,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 190 transitions, 2112 flow [2024-06-20 15:58:36,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 190 transitions, 1982 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 15:58:36,664 INFO L231 Difference]: Finished difference. Result has 133 places, 163 transitions, 1652 flow [2024-06-20 15:58:36,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1652, PETRI_PLACES=133, PETRI_TRANSITIONS=163} [2024-06-20 15:58:36,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-20 15:58:36,664 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 163 transitions, 1652 flow [2024-06-20 15:58:36,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:36,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:36,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:36,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:58:36,665 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)] === [2024-06-20 15:58:36,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1377402898, now seen corresponding path program 4 times [2024-06-20 15:58:36,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:36,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292172303] [2024-06-20 15:58:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:36,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:37,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:37,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292172303] [2024-06-20 15:58:37,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292172303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:37,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:37,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:37,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8631811] [2024-06-20 15:58:37,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:37,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:37,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:37,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:37,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:38,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:38,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 163 transitions, 1652 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:38,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:38,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:38,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:38,706 INFO L124 PetriNetUnfolderBase]: 1951/3054 cut-off events. [2024-06-20 15:58:38,706 INFO L125 PetriNetUnfolderBase]: For 112874/112880 co-relation queries the response was YES. [2024-06-20 15:58:38,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20768 conditions, 3054 events. 1951/3054 cut-off events. For 112874/112880 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15871 event pairs, 488 based on Foata normal form. 24/3073 useless extension candidates. Maximal degree in co-relation 20713. Up to 2523 conditions per place. [2024-06-20 15:58:38,725 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 74 changer transitions 0/204 dead transitions. [2024-06-20 15:58:38,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 204 transitions, 2335 flow [2024-06-20 15:58:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:58:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:58:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 15:58:38,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 15:58:38,727 INFO L175 Difference]: Start difference. First operand has 133 places, 163 transitions, 1652 flow. Second operand 10 states and 195 transitions. [2024-06-20 15:58:38,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 204 transitions, 2335 flow [2024-06-20 15:58:38,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 204 transitions, 2187 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:38,835 INFO L231 Difference]: Finished difference. Result has 136 places, 165 transitions, 1719 flow [2024-06-20 15:58:38,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1719, PETRI_PLACES=136, PETRI_TRANSITIONS=165} [2024-06-20 15:58:38,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 15:58:38,837 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 165 transitions, 1719 flow [2024-06-20 15:58:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:38,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:38,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:38,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:58:38,837 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)] === [2024-06-20 15:58:38,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:38,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1141047800, now seen corresponding path program 7 times [2024-06-20 15:58:38,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:38,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488467985] [2024-06-20 15:58:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:38,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:40,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:40,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488467985] [2024-06-20 15:58:40,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488467985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:40,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:40,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:40,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153403856] [2024-06-20 15:58:40,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:40,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:40,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:40,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 165 transitions, 1719 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:40,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:40,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:40,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:41,306 INFO L124 PetriNetUnfolderBase]: 1946/3047 cut-off events. [2024-06-20 15:58:41,306 INFO L125 PetriNetUnfolderBase]: For 111620/111626 co-relation queries the response was YES. [2024-06-20 15:58:41,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 3047 events. 1946/3047 cut-off events. For 111620/111626 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15880 event pairs, 488 based on Foata normal form. 6/3048 useless extension candidates. Maximal degree in co-relation 20893. Up to 2742 conditions per place. [2024-06-20 15:58:41,324 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 139 selfloop transitions, 45 changer transitions 0/192 dead transitions. [2024-06-20 15:58:41,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 192 transitions, 2157 flow [2024-06-20 15:58:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:58:41,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 15:58:41,326 INFO L175 Difference]: Start difference. First operand has 136 places, 165 transitions, 1719 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:58:41,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 192 transitions, 2157 flow [2024-06-20 15:58:41,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 192 transitions, 1996 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 15:58:41,470 INFO L231 Difference]: Finished difference. Result has 138 places, 165 transitions, 1656 flow [2024-06-20 15:58:41,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1656, PETRI_PLACES=138, PETRI_TRANSITIONS=165} [2024-06-20 15:58:41,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 15:58:41,471 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 165 transitions, 1656 flow [2024-06-20 15:58:41,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:41,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:41,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:41,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:58:41,471 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)] === [2024-06-20 15:58:41,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:41,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1369128440, now seen corresponding path program 8 times [2024-06-20 15:58:41,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:41,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868070596] [2024-06-20 15:58:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:42,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868070596] [2024-06-20 15:58:42,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868070596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:42,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:42,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:42,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910556046] [2024-06-20 15:58:42,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:42,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:42,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:42,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:42,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:42,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 165 transitions, 1656 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:42,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:42,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:42,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:43,245 INFO L124 PetriNetUnfolderBase]: 1957/3065 cut-off events. [2024-06-20 15:58:43,245 INFO L125 PetriNetUnfolderBase]: For 115145/115148 co-relation queries the response was YES. [2024-06-20 15:58:43,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20995 conditions, 3065 events. 1957/3065 cut-off events. For 115145/115148 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15980 event pairs, 494 based on Foata normal form. 2/3060 useless extension candidates. Maximal degree in co-relation 20940. Up to 2707 conditions per place. [2024-06-20 15:58:43,266 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 130 selfloop transitions, 58 changer transitions 0/196 dead transitions. [2024-06-20 15:58:43,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 196 transitions, 2187 flow [2024-06-20 15:58:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 15:58:43,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 15:58:43,268 INFO L175 Difference]: Start difference. First operand has 138 places, 165 transitions, 1656 flow. Second operand 9 states and 171 transitions. [2024-06-20 15:58:43,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 196 transitions, 2187 flow [2024-06-20 15:58:43,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 196 transitions, 1993 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-20 15:58:43,389 INFO L231 Difference]: Finished difference. Result has 137 places, 168 transitions, 1672 flow [2024-06-20 15:58:43,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1672, PETRI_PLACES=137, PETRI_TRANSITIONS=168} [2024-06-20 15:58:43,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-20 15:58:43,390 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 168 transitions, 1672 flow [2024-06-20 15:58:43,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:43,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:43,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:43,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:58:43,391 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:43,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1141227290, now seen corresponding path program 9 times [2024-06-20 15:58:43,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:43,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404233803] [2024-06-20 15:58:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:43,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:44,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:44,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404233803] [2024-06-20 15:58:44,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404233803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:44,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:44,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:58:44,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228065953] [2024-06-20 15:58:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:44,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:58:44,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:44,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:58:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:58:44,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:44,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 168 transitions, 1672 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:44,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:44,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:44,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:45,278 INFO L124 PetriNetUnfolderBase]: 1952/3058 cut-off events. [2024-06-20 15:58:45,278 INFO L125 PetriNetUnfolderBase]: For 121473/121476 co-relation queries the response was YES. [2024-06-20 15:58:45,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20992 conditions, 3058 events. 1952/3058 cut-off events. For 121473/121476 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15952 event pairs, 494 based on Foata normal form. 2/3053 useless extension candidates. Maximal degree in co-relation 20937. Up to 2691 conditions per place. [2024-06-20 15:58:45,298 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 127 selfloop transitions, 60 changer transitions 0/195 dead transitions. [2024-06-20 15:58:45,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 195 transitions, 2116 flow [2024-06-20 15:58:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:58:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:58:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 15:58:45,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 15:58:45,300 INFO L175 Difference]: Start difference. First operand has 137 places, 168 transitions, 1672 flow. Second operand 9 states and 172 transitions. [2024-06-20 15:58:45,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 195 transitions, 2116 flow [2024-06-20 15:58:45,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 195 transitions, 1894 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-20 15:58:45,410 INFO L231 Difference]: Finished difference. Result has 138 places, 168 transitions, 1578 flow [2024-06-20 15:58:45,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1578, PETRI_PLACES=138, PETRI_TRANSITIONS=168} [2024-06-20 15:58:45,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 15:58:45,411 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 168 transitions, 1578 flow [2024-06-20 15:58:45,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:45,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:45,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:45,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:58:45,411 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)] === [2024-06-20 15:58:45,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:45,412 INFO L85 PathProgramCache]: Analyzing trace with hash 731258806, now seen corresponding path program 2 times [2024-06-20 15:58:45,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:45,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620036073] [2024-06-20 15:58:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:45,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:46,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:46,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620036073] [2024-06-20 15:58:46,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620036073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:46,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:46,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:46,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800019203] [2024-06-20 15:58:46,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:46,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:46,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:46,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:46,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 15:58:46,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 168 transitions, 1578 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:46,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:46,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 15:58:46,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:46,642 INFO L124 PetriNetUnfolderBase]: 2050/3154 cut-off events. [2024-06-20 15:58:46,642 INFO L125 PetriNetUnfolderBase]: For 125534/125537 co-relation queries the response was YES. [2024-06-20 15:58:46,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 3154 events. 2050/3154 cut-off events. For 125534/125537 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16057 event pairs, 531 based on Foata normal form. 2/3149 useless extension candidates. Maximal degree in co-relation 21412. Up to 3041 conditions per place. [2024-06-20 15:58:46,663 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 157 selfloop transitions, 18 changer transitions 0/179 dead transitions. [2024-06-20 15:58:46,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 179 transitions, 1968 flow [2024-06-20 15:58:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 15:58:46,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 15:58:46,664 INFO L175 Difference]: Start difference. First operand has 138 places, 168 transitions, 1578 flow. Second operand 6 states and 105 transitions. [2024-06-20 15:58:46,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 179 transitions, 1968 flow [2024-06-20 15:58:46,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 1750 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 15:58:46,759 INFO L231 Difference]: Finished difference. Result has 136 places, 168 transitions, 1402 flow [2024-06-20 15:58:46,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1402, PETRI_PLACES=136, PETRI_TRANSITIONS=168} [2024-06-20 15:58:46,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 15:58:46,760 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 168 transitions, 1402 flow [2024-06-20 15:58:46,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:46,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:46,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:46,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:58:46,760 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)] === [2024-06-20 15:58:46,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:46,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2033041946, now seen corresponding path program 1 times [2024-06-20 15:58:46,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:46,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645125545] [2024-06-20 15:58:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:46,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:47,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:47,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645125545] [2024-06-20 15:58:47,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645125545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:47,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:47,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705772838] [2024-06-20 15:58:47,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:47,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:47,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:47,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:47,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 168 transitions, 1402 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:47,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:47,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:47,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:47,905 INFO L124 PetriNetUnfolderBase]: 1851/2937 cut-off events. [2024-06-20 15:58:47,906 INFO L125 PetriNetUnfolderBase]: For 110653/110653 co-relation queries the response was YES. [2024-06-20 15:58:47,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19263 conditions, 2937 events. 1851/2937 cut-off events. For 110653/110653 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15359 event pairs, 445 based on Foata normal form. 1/2935 useless extension candidates. Maximal degree in co-relation 19207. Up to 2783 conditions per place. [2024-06-20 15:58:47,926 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 164 selfloop transitions, 17 changer transitions 0/186 dead transitions. [2024-06-20 15:58:47,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 186 transitions, 1916 flow [2024-06-20 15:58:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 15:58:47,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 15:58:47,927 INFO L175 Difference]: Start difference. First operand has 136 places, 168 transitions, 1402 flow. Second operand 6 states and 111 transitions. [2024-06-20 15:58:47,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 186 transitions, 1916 flow [2024-06-20 15:58:47,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 1867 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:47,998 INFO L231 Difference]: Finished difference. Result has 137 places, 174 transitions, 1455 flow [2024-06-20 15:58:47,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1455, PETRI_PLACES=137, PETRI_TRANSITIONS=174} [2024-06-20 15:58:47,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-20 15:58:47,999 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 174 transitions, 1455 flow [2024-06-20 15:58:47,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:47,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:47,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:47,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:58:47,999 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)] === [2024-06-20 15:58:47,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2019129688, now seen corresponding path program 2 times [2024-06-20 15:58:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:48,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900267963] [2024-06-20 15:58:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:48,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:48,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900267963] [2024-06-20 15:58:48,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900267963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:48,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:48,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:58:48,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591956938] [2024-06-20 15:58:48,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:48,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:58:48,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:48,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:58:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:58:48,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:48,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 174 transitions, 1455 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:48,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:48,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:48,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:49,123 INFO L124 PetriNetUnfolderBase]: 1848/2933 cut-off events. [2024-06-20 15:58:49,124 INFO L125 PetriNetUnfolderBase]: For 116065/116065 co-relation queries the response was YES. [2024-06-20 15:58:49,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19618 conditions, 2933 events. 1848/2933 cut-off events. For 116065/116065 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15321 event pairs, 444 based on Foata normal form. 1/2931 useless extension candidates. Maximal degree in co-relation 19561. Up to 2792 conditions per place. [2024-06-20 15:58:49,144 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 165 selfloop transitions, 12 changer transitions 0/182 dead transitions. [2024-06-20 15:58:49,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 182 transitions, 1829 flow [2024-06-20 15:58:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:58:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:58:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 15:58:49,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 15:58:49,145 INFO L175 Difference]: Start difference. First operand has 137 places, 174 transitions, 1455 flow. Second operand 6 states and 105 transitions. [2024-06-20 15:58:49,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 182 transitions, 1829 flow [2024-06-20 15:58:49,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 182 transitions, 1780 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-20 15:58:49,249 INFO L231 Difference]: Finished difference. Result has 141 places, 174 transitions, 1436 flow [2024-06-20 15:58:49,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1436, PETRI_PLACES=141, PETRI_TRANSITIONS=174} [2024-06-20 15:58:49,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-20 15:58:49,250 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 174 transitions, 1436 flow [2024-06-20 15:58:49,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:49,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:49,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:49,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:58:49,250 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:49,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -971586864, now seen corresponding path program 1 times [2024-06-20 15:58:49,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:49,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423774092] [2024-06-20 15:58:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:49,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:50,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423774092] [2024-06-20 15:58:50,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423774092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:50,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:50,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:58:50,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678874546] [2024-06-20 15:58:50,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:50,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:58:50,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:58:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:58:50,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:50,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 174 transitions, 1436 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:50,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:50,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:50,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:51,434 INFO L124 PetriNetUnfolderBase]: 2017/3171 cut-off events. [2024-06-20 15:58:51,435 INFO L125 PetriNetUnfolderBase]: For 153295/153295 co-relation queries the response was YES. [2024-06-20 15:58:51,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22218 conditions, 3171 events. 2017/3171 cut-off events. For 153295/153295 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16676 event pairs, 496 based on Foata normal form. 16/3179 useless extension candidates. Maximal degree in co-relation 22159. Up to 2857 conditions per place. [2024-06-20 15:58:51,469 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 183 selfloop transitions, 22 changer transitions 0/215 dead transitions. [2024-06-20 15:58:51,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 215 transitions, 2026 flow [2024-06-20 15:58:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:58:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:58:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 15:58:51,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 15:58:51,473 INFO L175 Difference]: Start difference. First operand has 141 places, 174 transitions, 1436 flow. Second operand 10 states and 188 transitions. [2024-06-20 15:58:51,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 215 transitions, 2026 flow [2024-06-20 15:58:51,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 215 transitions, 1994 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:58:51,592 INFO L231 Difference]: Finished difference. Result has 146 places, 175 transitions, 1501 flow [2024-06-20 15:58:51,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1501, PETRI_PLACES=146, PETRI_TRANSITIONS=175} [2024-06-20 15:58:51,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-20 15:58:51,593 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 175 transitions, 1501 flow [2024-06-20 15:58:51,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:51,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:51,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:51,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:58:51,594 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:51,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:51,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1687165510, now seen corresponding path program 2 times [2024-06-20 15:58:51,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:51,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933638157] [2024-06-20 15:58:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:51,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:52,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:52,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933638157] [2024-06-20 15:58:52,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933638157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:52,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:52,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:58:52,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666731426] [2024-06-20 15:58:52,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:52,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:58:52,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:52,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:58:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:58:53,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:53,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 175 transitions, 1501 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:53,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:53,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:53,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:53,908 INFO L124 PetriNetUnfolderBase]: 2075/3271 cut-off events. [2024-06-20 15:58:53,908 INFO L125 PetriNetUnfolderBase]: For 164609/164609 co-relation queries the response was YES. [2024-06-20 15:58:53,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23273 conditions, 3271 events. 2075/3271 cut-off events. For 164609/164609 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17434 event pairs, 513 based on Foata normal form. 16/3284 useless extension candidates. Maximal degree in co-relation 23213. Up to 2943 conditions per place. [2024-06-20 15:58:53,930 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 176 selfloop transitions, 27 changer transitions 0/213 dead transitions. [2024-06-20 15:58:53,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 213 transitions, 2080 flow [2024-06-20 15:58:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:58:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:58:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 15:58:53,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 15:58:53,931 INFO L175 Difference]: Start difference. First operand has 146 places, 175 transitions, 1501 flow. Second operand 10 states and 187 transitions. [2024-06-20 15:58:53,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 213 transitions, 2080 flow [2024-06-20 15:58:54,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 213 transitions, 2019 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:58:54,051 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1550 flow [2024-06-20 15:58:54,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1550, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-20 15:58:54,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-20 15:58:54,052 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1550 flow [2024-06-20 15:58:54,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:54,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:54,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:54,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:58:54,053 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:54,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:54,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1686956260, now seen corresponding path program 3 times [2024-06-20 15:58:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:54,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384747983] [2024-06-20 15:58:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:54,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:55,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:55,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384747983] [2024-06-20 15:58:55,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384747983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:55,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:55,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:58:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931283462] [2024-06-20 15:58:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:58:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:58:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:58:55,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:55,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1550 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:55,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:55,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:55,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:56,380 INFO L124 PetriNetUnfolderBase]: 2291/3639 cut-off events. [2024-06-20 15:58:56,380 INFO L125 PetriNetUnfolderBase]: For 197796/197796 co-relation queries the response was YES. [2024-06-20 15:58:56,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27185 conditions, 3639 events. 2291/3639 cut-off events. For 197796/197796 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20266 event pairs, 563 based on Foata normal form. 12/3645 useless extension candidates. Maximal degree in co-relation 27124. Up to 2900 conditions per place. [2024-06-20 15:58:56,406 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 172 selfloop transitions, 40 changer transitions 0/222 dead transitions. [2024-06-20 15:58:56,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 222 transitions, 2409 flow [2024-06-20 15:58:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:58:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:58:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 15:58:56,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-20 15:58:56,407 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1550 flow. Second operand 10 states and 193 transitions. [2024-06-20 15:58:56,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 222 transitions, 2409 flow [2024-06-20 15:58:56,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 222 transitions, 2336 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:58:56,566 INFO L231 Difference]: Finished difference. Result has 151 places, 179 transitions, 1723 flow [2024-06-20 15:58:56,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1723, PETRI_PLACES=151, PETRI_TRANSITIONS=179} [2024-06-20 15:58:56,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 15:58:56,566 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 179 transitions, 1723 flow [2024-06-20 15:58:56,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:56,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:56,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:56,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:58:56,567 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:56,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1686963700, now seen corresponding path program 4 times [2024-06-20 15:58:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873818012] [2024-06-20 15:58:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:58:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:58:57,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:58:57,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873818012] [2024-06-20 15:58:57,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873818012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:58:57,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:58:57,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:58:57,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481496168] [2024-06-20 15:58:57,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:58:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:58:57,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:58:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:58:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:58:58,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:58:58,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 179 transitions, 1723 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:58,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:58:58,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:58:58,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:58:58,807 INFO L124 PetriNetUnfolderBase]: 2260/3592 cut-off events. [2024-06-20 15:58:58,807 INFO L125 PetriNetUnfolderBase]: For 198451/198451 co-relation queries the response was YES. [2024-06-20 15:58:58,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26558 conditions, 3592 events. 2260/3592 cut-off events. For 198451/198451 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19968 event pairs, 564 based on Foata normal form. 16/3605 useless extension candidates. Maximal degree in co-relation 26495. Up to 3185 conditions per place. [2024-06-20 15:58:58,833 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 160 selfloop transitions, 46 changer transitions 0/216 dead transitions. [2024-06-20 15:58:58,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 216 transitions, 2261 flow [2024-06-20 15:58:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:58:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:58:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 15:58:58,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 15:58:58,835 INFO L175 Difference]: Start difference. First operand has 151 places, 179 transitions, 1723 flow. Second operand 10 states and 189 transitions. [2024-06-20 15:58:58,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 216 transitions, 2261 flow [2024-06-20 15:58:59,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2191 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:58:59,005 INFO L231 Difference]: Finished difference. Result has 155 places, 179 transitions, 1752 flow [2024-06-20 15:58:59,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1752, PETRI_PLACES=155, PETRI_TRANSITIONS=179} [2024-06-20 15:58:59,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-20 15:58:59,006 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 179 transitions, 1752 flow [2024-06-20 15:58:59,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:58:59,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:58:59,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:58:59,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:58:59,007 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:58:59,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:58:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1692527890, now seen corresponding path program 5 times [2024-06-20 15:58:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:58:59,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526988199] [2024-06-20 15:58:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:58:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:58:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:00,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:00,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526988199] [2024-06-20 15:59:00,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526988199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:00,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:00,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:00,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744256215] [2024-06-20 15:59:00,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:00,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:00,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:00,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:00,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:00,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:00,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 179 transitions, 1752 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:00,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:00,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:00,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:01,339 INFO L124 PetriNetUnfolderBase]: 2293/3651 cut-off events. [2024-06-20 15:59:01,340 INFO L125 PetriNetUnfolderBase]: For 205921/205921 co-relation queries the response was YES. [2024-06-20 15:59:01,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27058 conditions, 3651 events. 2293/3651 cut-off events. For 205921/205921 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20368 event pairs, 577 based on Foata normal form. 16/3664 useless extension candidates. Maximal degree in co-relation 26993. Up to 3313 conditions per place. [2024-06-20 15:59:01,379 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 180 selfloop transitions, 27 changer transitions 0/217 dead transitions. [2024-06-20 15:59:01,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 217 transitions, 2344 flow [2024-06-20 15:59:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 15:59:01,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 15:59:01,381 INFO L175 Difference]: Start difference. First operand has 155 places, 179 transitions, 1752 flow. Second operand 10 states and 187 transitions. [2024-06-20 15:59:01,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 217 transitions, 2344 flow [2024-06-20 15:59:01,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 217 transitions, 2233 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:01,592 INFO L231 Difference]: Finished difference. Result has 157 places, 180 transitions, 1756 flow [2024-06-20 15:59:01,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1756, PETRI_PLACES=157, PETRI_TRANSITIONS=180} [2024-06-20 15:59:01,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-20 15:59:01,593 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 180 transitions, 1756 flow [2024-06-20 15:59:01,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:01,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:01,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:59:01,594 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)] === [2024-06-20 15:59:01,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1394225620, now seen corresponding path program 1 times [2024-06-20 15:59:01,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:01,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638717467] [2024-06-20 15:59:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:01,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638717467] [2024-06-20 15:59:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638717467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:02,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:02,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:02,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630067136] [2024-06-20 15:59:02,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:02,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:02,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:02,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:02,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:02,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 15:59:02,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 180 transitions, 1756 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:02,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:02,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 15:59:02,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:03,107 INFO L124 PetriNetUnfolderBase]: 2396/3758 cut-off events. [2024-06-20 15:59:03,107 INFO L125 PetriNetUnfolderBase]: For 203220/203220 co-relation queries the response was YES. [2024-06-20 15:59:03,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27626 conditions, 3758 events. 2396/3758 cut-off events. For 203220/203220 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20548 event pairs, 608 based on Foata normal form. 2/3757 useless extension candidates. Maximal degree in co-relation 27560. Up to 3600 conditions per place. [2024-06-20 15:59:03,135 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 26 changer transitions 0/208 dead transitions. [2024-06-20 15:59:03,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 208 transitions, 2392 flow [2024-06-20 15:59:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 15:59:03,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-20 15:59:03,137 INFO L175 Difference]: Start difference. First operand has 157 places, 180 transitions, 1756 flow. Second operand 7 states and 127 transitions. [2024-06-20 15:59:03,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 208 transitions, 2392 flow [2024-06-20 15:59:03,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 208 transitions, 2317 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:03,361 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 1840 flow [2024-06-20 15:59:03,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1840, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-20 15:59:03,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-20 15:59:03,361 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 1840 flow [2024-06-20 15:59:03,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:03,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:03,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:03,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:59:03,362 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:03,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:03,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1012744942, now seen corresponding path program 6 times [2024-06-20 15:59:03,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:03,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648687691] [2024-06-20 15:59:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:03,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:04,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:04,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648687691] [2024-06-20 15:59:04,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648687691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:04,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:04,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:04,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019940333] [2024-06-20 15:59:04,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:04,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:04,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:04,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:04,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:04,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:04,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 1840 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:04,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:04,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:04,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:05,834 INFO L124 PetriNetUnfolderBase]: 2359/3762 cut-off events. [2024-06-20 15:59:05,834 INFO L125 PetriNetUnfolderBase]: For 224378/224388 co-relation queries the response was YES. [2024-06-20 15:59:05,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28283 conditions, 3762 events. 2359/3762 cut-off events. For 224378/224388 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21219 event pairs, 587 based on Foata normal form. 20/3772 useless extension candidates. Maximal degree in co-relation 28215. Up to 3340 conditions per place. [2024-06-20 15:59:05,865 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 169 selfloop transitions, 46 changer transitions 0/225 dead transitions. [2024-06-20 15:59:05,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 225 transitions, 2443 flow [2024-06-20 15:59:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 15:59:05,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 15:59:05,867 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 1840 flow. Second operand 10 states and 188 transitions. [2024-06-20 15:59:05,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 225 transitions, 2443 flow [2024-06-20 15:59:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 225 transitions, 2406 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-20 15:59:06,119 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 1955 flow [2024-06-20 15:59:06,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1955, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2024-06-20 15:59:06,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-20 15:59:06,120 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 1955 flow [2024-06-20 15:59:06,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:06,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:06,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:06,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:59:06,125 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:06,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2098977632, now seen corresponding path program 7 times [2024-06-20 15:59:06,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:06,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153670137] [2024-06-20 15:59:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:06,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:07,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:07,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153670137] [2024-06-20 15:59:07,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153670137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:07,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:07,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:07,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864894029] [2024-06-20 15:59:07,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:07,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:07,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:07,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:07,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:07,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:07,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 190 transitions, 1955 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:07,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:07,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:07,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:08,447 INFO L124 PetriNetUnfolderBase]: 2547/4078 cut-off events. [2024-06-20 15:59:08,447 INFO L125 PetriNetUnfolderBase]: For 262059/262069 co-relation queries the response was YES. [2024-06-20 15:59:08,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32167 conditions, 4078 events. 2547/4078 cut-off events. For 262059/262069 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 23554 event pairs, 632 based on Foata normal form. 16/4084 useless extension candidates. Maximal degree in co-relation 32096. Up to 3286 conditions per place. [2024-06-20 15:59:08,480 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 165 selfloop transitions, 58 changer transitions 0/233 dead transitions. [2024-06-20 15:59:08,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 233 transitions, 2856 flow [2024-06-20 15:59:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 15:59:08,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-20 15:59:08,482 INFO L175 Difference]: Start difference. First operand has 165 places, 190 transitions, 1955 flow. Second operand 10 states and 194 transitions. [2024-06-20 15:59:08,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 233 transitions, 2856 flow [2024-06-20 15:59:08,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 233 transitions, 2741 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:08,746 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 2127 flow [2024-06-20 15:59:08,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1840, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2127, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2024-06-20 15:59:08,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-20 15:59:08,747 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 2127 flow [2024-06-20 15:59:08,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:08,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:08,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:08,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:59:08,747 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:08,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1125235852, now seen corresponding path program 8 times [2024-06-20 15:59:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:08,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599468841] [2024-06-20 15:59:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:09,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599468841] [2024-06-20 15:59:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599468841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:09,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:09,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:09,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701235578] [2024-06-20 15:59:09,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:09,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:09,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:09,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:10,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:10,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 2127 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:10,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:10,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:10,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:10,981 INFO L124 PetriNetUnfolderBase]: 2519/4031 cut-off events. [2024-06-20 15:59:10,981 INFO L125 PetriNetUnfolderBase]: For 261946/261953 co-relation queries the response was YES. [2024-06-20 15:59:10,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31452 conditions, 4031 events. 2519/4031 cut-off events. For 261946/261953 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23187 event pairs, 637 based on Foata normal form. 16/4035 useless extension candidates. Maximal degree in co-relation 31379. Up to 3552 conditions per place. [2024-06-20 15:59:11,013 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 61 changer transitions 0/228 dead transitions. [2024-06-20 15:59:11,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 228 transitions, 2685 flow [2024-06-20 15:59:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 15:59:11,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-20 15:59:11,014 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 2127 flow. Second operand 10 states and 191 transitions. [2024-06-20 15:59:11,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 228 transitions, 2685 flow [2024-06-20 15:59:11,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 228 transitions, 2589 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:11,259 INFO L231 Difference]: Finished difference. Result has 172 places, 193 transitions, 2160 flow [2024-06-20 15:59:11,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2160, PETRI_PLACES=172, PETRI_TRANSITIONS=193} [2024-06-20 15:59:11,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-20 15:59:11,259 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 193 transitions, 2160 flow [2024-06-20 15:59:11,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:11,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:11,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:59:11,260 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)] === [2024-06-20 15:59:11,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1125437662, now seen corresponding path program 9 times [2024-06-20 15:59:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:11,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627576536] [2024-06-20 15:59:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:12,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:12,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627576536] [2024-06-20 15:59:12,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627576536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:12,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:12,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:12,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489849146] [2024-06-20 15:59:12,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:12,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:12,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:12,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:12,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:12,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:12,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 193 transitions, 2160 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:12,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:12,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:12,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:13,688 INFO L124 PetriNetUnfolderBase]: 2491/3990 cut-off events. [2024-06-20 15:59:13,688 INFO L125 PetriNetUnfolderBase]: For 256922/256932 co-relation queries the response was YES. [2024-06-20 15:59:13,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30657 conditions, 3990 events. 2491/3990 cut-off events. For 256922/256932 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22953 event pairs, 615 based on Foata normal form. 20/4000 useless extension candidates. Maximal degree in co-relation 30582. Up to 3568 conditions per place. [2024-06-20 15:59:13,720 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 172 selfloop transitions, 46 changer transitions 0/228 dead transitions. [2024-06-20 15:59:13,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 228 transitions, 2718 flow [2024-06-20 15:59:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 15:59:13,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 15:59:13,721 INFO L175 Difference]: Start difference. First operand has 172 places, 193 transitions, 2160 flow. Second operand 10 states and 189 transitions. [2024-06-20 15:59:13,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 228 transitions, 2718 flow [2024-06-20 15:59:14,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 228 transitions, 2555 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:14,011 INFO L231 Difference]: Finished difference. Result has 174 places, 193 transitions, 2096 flow [2024-06-20 15:59:14,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2096, PETRI_PLACES=174, PETRI_TRANSITIONS=193} [2024-06-20 15:59:14,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-20 15:59:14,011 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 193 transitions, 2096 flow [2024-06-20 15:59:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:14,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:14,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:14,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:59:14,012 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:14,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash -506689810, now seen corresponding path program 10 times [2024-06-20 15:59:14,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:14,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778155141] [2024-06-20 15:59:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:14,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:15,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:15,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778155141] [2024-06-20 15:59:15,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778155141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:15,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:15,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:15,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547240721] [2024-06-20 15:59:15,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:15,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:15,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:15,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:15,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 193 transitions, 2096 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:15,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:15,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:15,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:16,108 INFO L124 PetriNetUnfolderBase]: 2549/4095 cut-off events. [2024-06-20 15:59:16,108 INFO L125 PetriNetUnfolderBase]: For 265424/265431 co-relation queries the response was YES. [2024-06-20 15:59:16,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31261 conditions, 4095 events. 2549/4095 cut-off events. For 265424/265431 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23777 event pairs, 636 based on Foata normal form. 16/4099 useless extension candidates. Maximal degree in co-relation 31185. Up to 3615 conditions per place. [2024-06-20 15:59:16,142 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 161 selfloop transitions, 59 changer transitions 0/230 dead transitions. [2024-06-20 15:59:16,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 230 transitions, 2713 flow [2024-06-20 15:59:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 15:59:16,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 15:59:16,144 INFO L175 Difference]: Start difference. First operand has 174 places, 193 transitions, 2096 flow. Second operand 10 states and 190 transitions. [2024-06-20 15:59:16,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 230 transitions, 2713 flow [2024-06-20 15:59:16,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 230 transitions, 2608 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:59:16,458 INFO L231 Difference]: Finished difference. Result has 175 places, 194 transitions, 2168 flow [2024-06-20 15:59:16,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2168, PETRI_PLACES=175, PETRI_TRANSITIONS=194} [2024-06-20 15:59:16,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-20 15:59:16,459 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 194 transitions, 2168 flow [2024-06-20 15:59:16,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:16,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:16,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:16,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:59:16,459 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:16,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash -506682370, now seen corresponding path program 11 times [2024-06-20 15:59:16,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:16,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276693463] [2024-06-20 15:59:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:16,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:17,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276693463] [2024-06-20 15:59:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276693463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:17,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:17,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251858684] [2024-06-20 15:59:17,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:17,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:17,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:17,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:17,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 194 transitions, 2168 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:17,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:17,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:17,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:18,767 INFO L124 PetriNetUnfolderBase]: 2607/4196 cut-off events. [2024-06-20 15:59:18,767 INFO L125 PetriNetUnfolderBase]: For 275566/275576 co-relation queries the response was YES. [2024-06-20 15:59:18,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32219 conditions, 4196 events. 2607/4196 cut-off events. For 275566/275576 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24566 event pairs, 625 based on Foata normal form. 16/4202 useless extension candidates. Maximal degree in co-relation 32142. Up to 3539 conditions per place. [2024-06-20 15:59:18,806 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 173 selfloop transitions, 54 changer transitions 0/237 dead transitions. [2024-06-20 15:59:18,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 237 transitions, 2867 flow [2024-06-20 15:59:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 15:59:18,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-20 15:59:18,807 INFO L175 Difference]: Start difference. First operand has 175 places, 194 transitions, 2168 flow. Second operand 10 states and 192 transitions. [2024-06-20 15:59:18,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 237 transitions, 2867 flow [2024-06-20 15:59:19,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 237 transitions, 2726 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:19,191 INFO L231 Difference]: Finished difference. Result has 178 places, 197 transitions, 2244 flow [2024-06-20 15:59:19,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2244, PETRI_PLACES=178, PETRI_TRANSITIONS=197} [2024-06-20 15:59:19,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-20 15:59:19,192 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 197 transitions, 2244 flow [2024-06-20 15:59:19,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:19,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:19,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:19,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:59:19,192 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:19,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash -250189300, now seen corresponding path program 12 times [2024-06-20 15:59:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:19,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253703557] [2024-06-20 15:59:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:20,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:20,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253703557] [2024-06-20 15:59:20,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253703557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:20,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:20,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:20,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392849898] [2024-06-20 15:59:20,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:20,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:20,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:20,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:20,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 197 transitions, 2244 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:20,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:20,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:20,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:21,363 INFO L124 PetriNetUnfolderBase]: 2665/4301 cut-off events. [2024-06-20 15:59:21,363 INFO L125 PetriNetUnfolderBase]: For 292470/292477 co-relation queries the response was YES. [2024-06-20 15:59:21,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33151 conditions, 4301 events. 2665/4301 cut-off events. For 292470/292477 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25383 event pairs, 661 based on Foata normal form. 16/4305 useless extension candidates. Maximal degree in co-relation 33072. Up to 3703 conditions per place. [2024-06-20 15:59:21,402 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 133 selfloop transitions, 91 changer transitions 0/234 dead transitions. [2024-06-20 15:59:21,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 234 transitions, 2873 flow [2024-06-20 15:59:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 15:59:21,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 15:59:21,404 INFO L175 Difference]: Start difference. First operand has 178 places, 197 transitions, 2244 flow. Second operand 10 states and 190 transitions. [2024-06-20 15:59:21,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 234 transitions, 2873 flow [2024-06-20 15:59:21,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 234 transitions, 2742 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:21,862 INFO L231 Difference]: Finished difference. Result has 181 places, 198 transitions, 2358 flow [2024-06-20 15:59:21,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2358, PETRI_PLACES=181, PETRI_TRANSITIONS=198} [2024-06-20 15:59:21,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-20 15:59:21,863 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 198 transitions, 2358 flow [2024-06-20 15:59:21,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:21,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:21,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:21,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:59:21,864 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:21,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash -250181860, now seen corresponding path program 13 times [2024-06-20 15:59:21,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:21,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273045575] [2024-06-20 15:59:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:21,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:23,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:23,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273045575] [2024-06-20 15:59:23,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273045575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:23,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:23,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847153811] [2024-06-20 15:59:23,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:23,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:23,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:23,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:23,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 198 transitions, 2358 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:23,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:23,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:23,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:24,127 INFO L124 PetriNetUnfolderBase]: 2706/4385 cut-off events. [2024-06-20 15:59:24,127 INFO L125 PetriNetUnfolderBase]: For 300827/300837 co-relation queries the response was YES. [2024-06-20 15:59:24,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33946 conditions, 4385 events. 2706/4385 cut-off events. For 300827/300837 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26105 event pairs, 655 based on Foata normal form. 16/4391 useless extension candidates. Maximal degree in co-relation 33866. Up to 3729 conditions per place. [2024-06-20 15:59:24,164 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 82 changer transitions 0/238 dead transitions. [2024-06-20 15:59:24,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 238 transitions, 3023 flow [2024-06-20 15:59:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 15:59:24,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-20 15:59:24,166 INFO L175 Difference]: Start difference. First operand has 181 places, 198 transitions, 2358 flow. Second operand 10 states and 192 transitions. [2024-06-20 15:59:24,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 238 transitions, 3023 flow [2024-06-20 15:59:24,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 238 transitions, 2814 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:24,581 INFO L231 Difference]: Finished difference. Result has 183 places, 199 transitions, 2377 flow [2024-06-20 15:59:24,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2377, PETRI_PLACES=183, PETRI_TRANSITIONS=199} [2024-06-20 15:59:24,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-20 15:59:24,581 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 199 transitions, 2377 flow [2024-06-20 15:59:24,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:24,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:24,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:24,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:59:24,582 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:24,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash -240985090, now seen corresponding path program 14 times [2024-06-20 15:59:24,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:24,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358075221] [2024-06-20 15:59:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:24,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:25,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:25,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358075221] [2024-06-20 15:59:25,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358075221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:25,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:25,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137742744] [2024-06-20 15:59:25,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:25,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:25,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 199 transitions, 2377 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:25,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:25,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:25,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:26,859 INFO L124 PetriNetUnfolderBase]: 2763/4488 cut-off events. [2024-06-20 15:59:26,859 INFO L125 PetriNetUnfolderBase]: For 307193/307203 co-relation queries the response was YES. [2024-06-20 15:59:26,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34366 conditions, 4488 events. 2763/4488 cut-off events. For 307193/307203 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26779 event pairs, 641 based on Foata normal form. 16/4494 useless extension candidates. Maximal degree in co-relation 34285. Up to 2725 conditions per place. [2024-06-20 15:59:26,893 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 133 selfloop transitions, 98 changer transitions 0/241 dead transitions. [2024-06-20 15:59:26,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 241 transitions, 3083 flow [2024-06-20 15:59:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 15:59:26,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-20 15:59:26,895 INFO L175 Difference]: Start difference. First operand has 183 places, 199 transitions, 2377 flow. Second operand 10 states and 192 transitions. [2024-06-20 15:59:26,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 241 transitions, 3083 flow [2024-06-20 15:59:27,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 241 transitions, 2873 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 15:59:27,405 INFO L231 Difference]: Finished difference. Result has 186 places, 201 transitions, 2502 flow [2024-06-20 15:59:27,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2502, PETRI_PLACES=186, PETRI_TRANSITIONS=201} [2024-06-20 15:59:27,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-20 15:59:27,406 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 201 transitions, 2502 flow [2024-06-20 15:59:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:27,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:27,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:27,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:59:27,407 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:27,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1194187810, now seen corresponding path program 2 times [2024-06-20 15:59:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:27,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621417923] [2024-06-20 15:59:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:28,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:28,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621417923] [2024-06-20 15:59:28,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621417923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:28,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:28,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:28,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64129371] [2024-06-20 15:59:28,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:28,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:28,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:28,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:28,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 15:59:28,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 201 transitions, 2502 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:28,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:28,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 15:59:28,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:29,290 INFO L124 PetriNetUnfolderBase]: 2868/4598 cut-off events. [2024-06-20 15:59:29,290 INFO L125 PetriNetUnfolderBase]: For 306052/306052 co-relation queries the response was YES. [2024-06-20 15:59:29,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35337 conditions, 4598 events. 2868/4598 cut-off events. For 306052/306052 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27097 event pairs, 696 based on Foata normal form. 2/4594 useless extension candidates. Maximal degree in co-relation 35255. Up to 4404 conditions per place. [2024-06-20 15:59:29,330 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 31 changer transitions 0/220 dead transitions. [2024-06-20 15:59:29,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 220 transitions, 3148 flow [2024-06-20 15:59:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 15:59:29,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 15:59:29,332 INFO L175 Difference]: Start difference. First operand has 186 places, 201 transitions, 2502 flow. Second operand 8 states and 134 transitions. [2024-06-20 15:59:29,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 220 transitions, 3148 flow [2024-06-20 15:59:29,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 220 transitions, 2950 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:29,858 INFO L231 Difference]: Finished difference. Result has 188 places, 206 transitions, 2436 flow [2024-06-20 15:59:29,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2436, PETRI_PLACES=188, PETRI_TRANSITIONS=206} [2024-06-20 15:59:29,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-20 15:59:29,859 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 206 transitions, 2436 flow [2024-06-20 15:59:29,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:29,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:29,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:29,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:59:29,860 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:29,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:29,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1194603520, now seen corresponding path program 3 times [2024-06-20 15:59:29,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:29,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657476667] [2024-06-20 15:59:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:29,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:30,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:30,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657476667] [2024-06-20 15:59:30,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657476667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:30,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:30,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602325665] [2024-06-20 15:59:30,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:30,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:30,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:30,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 15:59:30,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 206 transitions, 2436 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:30,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:30,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 15:59:30,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:31,547 INFO L124 PetriNetUnfolderBase]: 2862/4590 cut-off events. [2024-06-20 15:59:31,547 INFO L125 PetriNetUnfolderBase]: For 308591/308591 co-relation queries the response was YES. [2024-06-20 15:59:31,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34807 conditions, 4590 events. 2862/4590 cut-off events. For 308591/308591 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27031 event pairs, 695 based on Foata normal form. 2/4586 useless extension candidates. Maximal degree in co-relation 34723. Up to 4399 conditions per place. [2024-06-20 15:59:31,588 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 32 changer transitions 0/219 dead transitions. [2024-06-20 15:59:31,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 219 transitions, 2920 flow [2024-06-20 15:59:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:59:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:59:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 15:59:31,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 15:59:31,590 INFO L175 Difference]: Start difference. First operand has 188 places, 206 transitions, 2436 flow. Second operand 8 states and 132 transitions. [2024-06-20 15:59:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 219 transitions, 2920 flow [2024-06-20 15:59:32,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 219 transitions, 2820 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 15:59:32,167 INFO L231 Difference]: Finished difference. Result has 193 places, 206 transitions, 2406 flow [2024-06-20 15:59:32,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2406, PETRI_PLACES=193, PETRI_TRANSITIONS=206} [2024-06-20 15:59:32,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-20 15:59:32,168 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 206 transitions, 2406 flow [2024-06-20 15:59:32,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:32,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:32,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:32,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:59:32,168 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:32,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1017235966, now seen corresponding path program 1 times [2024-06-20 15:59:32,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:32,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048240324] [2024-06-20 15:59:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:32,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:32,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:32,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048240324] [2024-06-20 15:59:32,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048240324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:32,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:32,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:32,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182573533] [2024-06-20 15:59:32,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:32,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:33,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:33,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 206 transitions, 2406 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:33,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:33,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:33,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:33,725 INFO L124 PetriNetUnfolderBase]: 2725/4450 cut-off events. [2024-06-20 15:59:33,725 INFO L125 PetriNetUnfolderBase]: For 278962/278962 co-relation queries the response was YES. [2024-06-20 15:59:33,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32890 conditions, 4450 events. 2725/4450 cut-off events. For 278962/278962 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26942 event pairs, 618 based on Foata normal form. 1/4441 useless extension candidates. Maximal degree in co-relation 32804. Up to 4238 conditions per place. [2024-06-20 15:59:33,764 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 200 selfloop transitions, 15 changer transitions 0/224 dead transitions. [2024-06-20 15:59:33,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 224 transitions, 2916 flow [2024-06-20 15:59:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 15:59:33,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-20 15:59:33,766 INFO L175 Difference]: Start difference. First operand has 193 places, 206 transitions, 2406 flow. Second operand 7 states and 125 transitions. [2024-06-20 15:59:33,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 224 transitions, 2916 flow [2024-06-20 15:59:34,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 224 transitions, 2856 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:34,296 INFO L231 Difference]: Finished difference. Result has 194 places, 209 transitions, 2430 flow [2024-06-20 15:59:34,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2430, PETRI_PLACES=194, PETRI_TRANSITIONS=209} [2024-06-20 15:59:34,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 15:59:34,297 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 209 transitions, 2430 flow [2024-06-20 15:59:34,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:34,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:34,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:34,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:59:34,298 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:34,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1182591232, now seen corresponding path program 2 times [2024-06-20 15:59:34,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:34,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767816399] [2024-06-20 15:59:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:34,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:35,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:35,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767816399] [2024-06-20 15:59:35,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767816399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:35,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:35,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460361074] [2024-06-20 15:59:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:35,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:35,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:35,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:35,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:35,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:35,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 209 transitions, 2430 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:35,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:35,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:35,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:35,843 INFO L124 PetriNetUnfolderBase]: 2730/4457 cut-off events. [2024-06-20 15:59:35,843 INFO L125 PetriNetUnfolderBase]: For 287068/287068 co-relation queries the response was YES. [2024-06-20 15:59:35,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33307 conditions, 4457 events. 2730/4457 cut-off events. For 287068/287068 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27021 event pairs, 619 based on Foata normal form. 1/4448 useless extension candidates. Maximal degree in co-relation 33220. Up to 4229 conditions per place. [2024-06-20 15:59:35,887 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 27 changer transitions 0/228 dead transitions. [2024-06-20 15:59:35,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 228 transitions, 3102 flow [2024-06-20 15:59:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 15:59:35,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-20 15:59:35,888 INFO L175 Difference]: Start difference. First operand has 194 places, 209 transitions, 2430 flow. Second operand 7 states and 127 transitions. [2024-06-20 15:59:35,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 228 transitions, 3102 flow [2024-06-20 15:59:36,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 228 transitions, 3040 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:59:36,408 INFO L231 Difference]: Finished difference. Result has 196 places, 215 transitions, 2530 flow [2024-06-20 15:59:36,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2530, PETRI_PLACES=196, PETRI_TRANSITIONS=215} [2024-06-20 15:59:36,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-20 15:59:36,409 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 215 transitions, 2530 flow [2024-06-20 15:59:36,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:36,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:36,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:36,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:59:36,410 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)] === [2024-06-20 15:59:36,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1400207810, now seen corresponding path program 1 times [2024-06-20 15:59:36,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:36,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040947155] [2024-06-20 15:59:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:36,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:37,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:37,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040947155] [2024-06-20 15:59:37,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040947155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:37,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:37,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:37,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088183650] [2024-06-20 15:59:37,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:37,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:37,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:37,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 215 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:37,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:37,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:37,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:37,902 INFO L124 PetriNetUnfolderBase]: 2748/4484 cut-off events. [2024-06-20 15:59:37,902 INFO L125 PetriNetUnfolderBase]: For 300053/300053 co-relation queries the response was YES. [2024-06-20 15:59:37,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33896 conditions, 4484 events. 2748/4484 cut-off events. For 300053/300053 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27148 event pairs, 619 based on Foata normal form. 2/4476 useless extension candidates. Maximal degree in co-relation 33808. Up to 4251 conditions per place. [2024-06-20 15:59:37,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 26 changer transitions 0/239 dead transitions. [2024-06-20 15:59:37,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 239 transitions, 3216 flow [2024-06-20 15:59:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 15:59:37,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-20 15:59:37,947 INFO L175 Difference]: Start difference. First operand has 196 places, 215 transitions, 2530 flow. Second operand 7 states and 129 transitions. [2024-06-20 15:59:37,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 239 transitions, 3216 flow [2024-06-20 15:59:38,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 239 transitions, 3155 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:59:38,519 INFO L231 Difference]: Finished difference. Result has 201 places, 224 transitions, 2632 flow [2024-06-20 15:59:38,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2632, PETRI_PLACES=201, PETRI_TRANSITIONS=224} [2024-06-20 15:59:38,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-20 15:59:38,519 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 224 transitions, 2632 flow [2024-06-20 15:59:38,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:38,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:38,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:38,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:59:38,520 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)] === [2024-06-20 15:59:38,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1831487994, now seen corresponding path program 3 times [2024-06-20 15:59:38,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:38,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217020946] [2024-06-20 15:59:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:38,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:39,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:39,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217020946] [2024-06-20 15:59:39,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217020946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:39,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:39,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:39,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824545978] [2024-06-20 15:59:39,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:39,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:39,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 224 transitions, 2632 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:39,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:39,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:39,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:40,008 INFO L124 PetriNetUnfolderBase]: 2745/4480 cut-off events. [2024-06-20 15:59:40,008 INFO L125 PetriNetUnfolderBase]: For 306782/306782 co-relation queries the response was YES. [2024-06-20 15:59:40,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34419 conditions, 4480 events. 2745/4480 cut-off events. For 306782/306782 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27100 event pairs, 617 based on Foata normal form. 1/4471 useless extension candidates. Maximal degree in co-relation 34328. Up to 4278 conditions per place. [2024-06-20 15:59:40,055 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 209 selfloop transitions, 15 changer transitions 0/233 dead transitions. [2024-06-20 15:59:40,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 233 transitions, 3102 flow [2024-06-20 15:59:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 15:59:40,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 15:59:40,056 INFO L175 Difference]: Start difference. First operand has 201 places, 224 transitions, 2632 flow. Second operand 7 states and 119 transitions. [2024-06-20 15:59:40,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 233 transitions, 3102 flow [2024-06-20 15:59:40,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 233 transitions, 3028 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-20 15:59:40,705 INFO L231 Difference]: Finished difference. Result has 206 places, 224 transitions, 2594 flow [2024-06-20 15:59:40,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2594, PETRI_PLACES=206, PETRI_TRANSITIONS=224} [2024-06-20 15:59:40,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 15:59:40,706 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 224 transitions, 2594 flow [2024-06-20 15:59:40,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:40,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:40,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:40,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:59:40,707 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)] === [2024-06-20 15:59:40,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1189257658, now seen corresponding path program 2 times [2024-06-20 15:59:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:40,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736639916] [2024-06-20 15:59:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:40,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:41,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:41,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736639916] [2024-06-20 15:59:41,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736639916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:41,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:41,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:41,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500251267] [2024-06-20 15:59:41,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:41,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:41,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:41,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:41,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 224 transitions, 2594 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:41,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:41,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:41,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:42,322 INFO L124 PetriNetUnfolderBase]: 2755/4496 cut-off events. [2024-06-20 15:59:42,323 INFO L125 PetriNetUnfolderBase]: For 317139/317139 co-relation queries the response was YES. [2024-06-20 15:59:42,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34609 conditions, 4496 events. 2755/4496 cut-off events. For 317139/317139 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27178 event pairs, 617 based on Foata normal form. 2/4488 useless extension candidates. Maximal degree in co-relation 34515. Up to 4287 conditions per place. [2024-06-20 15:59:42,363 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 17 changer transitions 0/237 dead transitions. [2024-06-20 15:59:42,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 237 transitions, 3112 flow [2024-06-20 15:59:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 15:59:42,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 15:59:42,365 INFO L175 Difference]: Start difference. First operand has 206 places, 224 transitions, 2594 flow. Second operand 7 states and 120 transitions. [2024-06-20 15:59:42,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 237 transitions, 3112 flow [2024-06-20 15:59:42,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 237 transitions, 3066 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:42,791 INFO L231 Difference]: Finished difference. Result has 207 places, 227 transitions, 2631 flow [2024-06-20 15:59:42,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2631, PETRI_PLACES=207, PETRI_TRANSITIONS=227} [2024-06-20 15:59:42,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 15:59:42,792 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 227 transitions, 2631 flow [2024-06-20 15:59:42,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:42,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:42,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:42,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:59:42,793 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)] === [2024-06-20 15:59:42,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1194372322, now seen corresponding path program 3 times [2024-06-20 15:59:42,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:42,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103027876] [2024-06-20 15:59:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:43,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:43,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103027876] [2024-06-20 15:59:43,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103027876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:43,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:43,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:59:43,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094188209] [2024-06-20 15:59:43,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:43,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:59:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:59:43,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:59:43,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:43,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 227 transitions, 2631 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:43,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:43,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:43,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:44,363 INFO L124 PetriNetUnfolderBase]: 2749/4488 cut-off events. [2024-06-20 15:59:44,363 INFO L125 PetriNetUnfolderBase]: For 322884/322884 co-relation queries the response was YES. [2024-06-20 15:59:44,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34628 conditions, 4488 events. 2749/4488 cut-off events. For 322884/322884 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27210 event pairs, 616 based on Foata normal form. 2/4480 useless extension candidates. Maximal degree in co-relation 34533. Up to 4270 conditions per place. [2024-06-20 15:59:44,407 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 22 changer transitions 0/238 dead transitions. [2024-06-20 15:59:44,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 238 transitions, 3119 flow [2024-06-20 15:59:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:59:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:59:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 15:59:44,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 15:59:44,409 INFO L175 Difference]: Start difference. First operand has 207 places, 227 transitions, 2631 flow. Second operand 7 states and 123 transitions. [2024-06-20 15:59:44,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 238 transitions, 3119 flow [2024-06-20 15:59:44,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 238 transitions, 3047 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:59:44,843 INFO L231 Difference]: Finished difference. Result has 209 places, 227 transitions, 2609 flow [2024-06-20 15:59:44,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2609, PETRI_PLACES=209, PETRI_TRANSITIONS=227} [2024-06-20 15:59:44,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-20 15:59:44,843 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 227 transitions, 2609 flow [2024-06-20 15:59:44,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-20 15:59:44,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:44,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:44,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:59:44,844 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:44,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -933273173, now seen corresponding path program 1 times [2024-06-20 15:59:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:44,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896300466] [2024-06-20 15:59:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:44,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:46,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:46,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896300466] [2024-06-20 15:59:46,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896300466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:46,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:46,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:46,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089235690] [2024-06-20 15:59:46,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:46,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:46,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:46,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:46,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:46,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 227 transitions, 2609 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:46,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:46,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:46,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:47,328 INFO L124 PetriNetUnfolderBase]: 2892/4673 cut-off events. [2024-06-20 15:59:47,328 INFO L125 PetriNetUnfolderBase]: For 406391/406393 co-relation queries the response was YES. [2024-06-20 15:59:47,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37609 conditions, 4673 events. 2892/4673 cut-off events. For 406391/406393 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28133 event pairs, 612 based on Foata normal form. 12/4663 useless extension candidates. Maximal degree in co-relation 37514. Up to 4336 conditions per place. [2024-06-20 15:59:47,375 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 22 changer transitions 0/269 dead transitions. [2024-06-20 15:59:47,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 269 transitions, 3306 flow [2024-06-20 15:59:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 15:59:47,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 15:59:47,377 INFO L175 Difference]: Start difference. First operand has 209 places, 227 transitions, 2609 flow. Second operand 10 states and 187 transitions. [2024-06-20 15:59:47,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 269 transitions, 3306 flow [2024-06-20 15:59:47,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 269 transitions, 3235 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:59:48,025 INFO L231 Difference]: Finished difference. Result has 214 places, 230 transitions, 2665 flow [2024-06-20 15:59:48,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2665, PETRI_PLACES=214, PETRI_TRANSITIONS=230} [2024-06-20 15:59:48,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-20 15:59:48,025 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 230 transitions, 2665 flow [2024-06-20 15:59:48,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:48,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:48,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:48,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:59:48,026 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:48,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1057437123, now seen corresponding path program 2 times [2024-06-20 15:59:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:48,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357124291] [2024-06-20 15:59:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:48,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:49,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:49,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357124291] [2024-06-20 15:59:49,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357124291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:49,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:49,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:49,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307147998] [2024-06-20 15:59:49,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:49,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:49,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:49,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:49,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:49,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:49,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 230 transitions, 2665 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:49,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:49,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:49,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:50,551 INFO L124 PetriNetUnfolderBase]: 2926/4737 cut-off events. [2024-06-20 15:59:50,552 INFO L125 PetriNetUnfolderBase]: For 415147/415147 co-relation queries the response was YES. [2024-06-20 15:59:50,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38275 conditions, 4737 events. 2926/4737 cut-off events. For 415147/415147 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 28678 event pairs, 653 based on Foata normal form. 12/4732 useless extension candidates. Maximal degree in co-relation 38178. Up to 4353 conditions per place. [2024-06-20 15:59:50,603 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 25 changer transitions 0/273 dead transitions. [2024-06-20 15:59:50,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 273 transitions, 3384 flow [2024-06-20 15:59:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 15:59:50,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 15:59:50,605 INFO L175 Difference]: Start difference. First operand has 214 places, 230 transitions, 2665 flow. Second operand 10 states and 189 transitions. [2024-06-20 15:59:50,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 273 transitions, 3384 flow [2024-06-20 15:59:51,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 273 transitions, 3301 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:51,185 INFO L231 Difference]: Finished difference. Result has 218 places, 233 transitions, 2728 flow [2024-06-20 15:59:51,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2728, PETRI_PLACES=218, PETRI_TRANSITIONS=233} [2024-06-20 15:59:51,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-20 15:59:51,186 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 233 transitions, 2728 flow [2024-06-20 15:59:51,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:51,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:51,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:51,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:59:51,187 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:51,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:51,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1490240021, now seen corresponding path program 3 times [2024-06-20 15:59:51,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:51,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876423164] [2024-06-20 15:59:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:51,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:52,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:52,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876423164] [2024-06-20 15:59:52,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876423164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:52,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:52,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:52,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65271409] [2024-06-20 15:59:52,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:52,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:52,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:52,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:52,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 233 transitions, 2728 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:52,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:52,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:52,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:53,618 INFO L124 PetriNetUnfolderBase]: 2958/4795 cut-off events. [2024-06-20 15:59:53,618 INFO L125 PetriNetUnfolderBase]: For 429403/429415 co-relation queries the response was YES. [2024-06-20 15:59:53,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38842 conditions, 4795 events. 2958/4795 cut-off events. For 429403/429415 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28943 event pairs, 591 based on Foata normal form. 12/4796 useless extension candidates. Maximal degree in co-relation 38743. Up to 4412 conditions per place. [2024-06-20 15:59:53,669 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-20 15:59:53,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 277 transitions, 3459 flow [2024-06-20 15:59:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 15:59:53,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 15:59:53,670 INFO L175 Difference]: Start difference. First operand has 218 places, 233 transitions, 2728 flow. Second operand 10 states and 187 transitions. [2024-06-20 15:59:53,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 277 transitions, 3459 flow [2024-06-20 15:59:54,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 277 transitions, 3353 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:54,253 INFO L231 Difference]: Finished difference. Result has 222 places, 236 transitions, 2757 flow [2024-06-20 15:59:54,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2757, PETRI_PLACES=222, PETRI_TRANSITIONS=236} [2024-06-20 15:59:54,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-20 15:59:54,254 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 236 transitions, 2757 flow [2024-06-20 15:59:54,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:54,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:54,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:54,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:59:54,255 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:54,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1227660227, now seen corresponding path program 4 times [2024-06-20 15:59:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:54,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773259913] [2024-06-20 15:59:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:54,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:55,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:55,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773259913] [2024-06-20 15:59:55,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773259913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:55,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:55,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:55,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60071583] [2024-06-20 15:59:55,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:55,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:55,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:55,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:55,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:55,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 236 transitions, 2757 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:55,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:55,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:55,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:56,719 INFO L124 PetriNetUnfolderBase]: 3017/4898 cut-off events. [2024-06-20 15:59:56,719 INFO L125 PetriNetUnfolderBase]: For 442175/442175 co-relation queries the response was YES. [2024-06-20 15:59:56,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39516 conditions, 4898 events. 3017/4898 cut-off events. For 442175/442175 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29862 event pairs, 701 based on Foata normal form. 12/4903 useless extension candidates. Maximal degree in co-relation 39415. Up to 4539 conditions per place. [2024-06-20 15:59:56,776 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 26 changer transitions 0/276 dead transitions. [2024-06-20 15:59:56,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 276 transitions, 3462 flow [2024-06-20 15:59:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:59:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:59:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 15:59:56,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-20 15:59:56,777 INFO L175 Difference]: Start difference. First operand has 222 places, 236 transitions, 2757 flow. Second operand 10 states and 186 transitions. [2024-06-20 15:59:56,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 276 transitions, 3462 flow [2024-06-20 15:59:57,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 276 transitions, 3366 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:59:57,335 INFO L231 Difference]: Finished difference. Result has 226 places, 239 transitions, 2796 flow [2024-06-20 15:59:57,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2796, PETRI_PLACES=226, PETRI_TRANSITIONS=239} [2024-06-20 15:59:57,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-20 15:59:57,336 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 239 transitions, 2796 flow [2024-06-20 15:59:57,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:57,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:59:57,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:59:57,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:59:57,337 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:59:57,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:59:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1061426447, now seen corresponding path program 5 times [2024-06-20 15:59:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:59:57,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490963109] [2024-06-20 15:59:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:59:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:59:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:59:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:59:58,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:59:58,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490963109] [2024-06-20 15:59:58,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490963109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:59:58,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:59:58,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:59:58,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533496757] [2024-06-20 15:59:58,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:59:58,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:59:58,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:59:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:59:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:59:58,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 15:59:58,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 239 transitions, 2796 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:59:58,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:59:58,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 15:59:58,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:59:59,942 INFO L124 PetriNetUnfolderBase]: 2997/4866 cut-off events. [2024-06-20 15:59:59,943 INFO L125 PetriNetUnfolderBase]: For 433110/433110 co-relation queries the response was YES. [2024-06-20 15:59:59,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38560 conditions, 4866 events. 2997/4866 cut-off events. For 433110/433110 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29664 event pairs, 687 based on Foata normal form. 12/4871 useless extension candidates. Maximal degree in co-relation 38457. Up to 4507 conditions per place. [2024-06-20 15:59:59,999 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 26 changer transitions 0/277 dead transitions. [2024-06-20 15:59:59,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 277 transitions, 3441 flow [2024-06-20 16:00:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:00:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:00:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 16:00:00,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-20 16:00:00,000 INFO L175 Difference]: Start difference. First operand has 226 places, 239 transitions, 2796 flow. Second operand 10 states and 186 transitions. [2024-06-20 16:00:00,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 277 transitions, 3441 flow [2024-06-20 16:00:00,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 277 transitions, 3342 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 16:00:00,654 INFO L231 Difference]: Finished difference. Result has 230 places, 240 transitions, 2766 flow [2024-06-20 16:00:00,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2766, PETRI_PLACES=230, PETRI_TRANSITIONS=240} [2024-06-20 16:00:00,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-20 16:00:00,655 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 240 transitions, 2766 flow [2024-06-20 16:00:00,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:00,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:00,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:00,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:00:00,655 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:00,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash -933524041, now seen corresponding path program 6 times [2024-06-20 16:00:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:00,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134213045] [2024-06-20 16:00:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:00,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:01,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:01,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134213045] [2024-06-20 16:00:01,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134213045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:01,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:01,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:00:01,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770460001] [2024-06-20 16:00:01,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:01,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:00:01,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:00:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:00:02,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:02,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 240 transitions, 2766 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:02,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:02,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:02,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:03,151 INFO L124 PetriNetUnfolderBase]: 3038/4937 cut-off events. [2024-06-20 16:00:03,151 INFO L125 PetriNetUnfolderBase]: For 446215/446215 co-relation queries the response was YES. [2024-06-20 16:00:03,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39101 conditions, 4937 events. 3038/4937 cut-off events. For 446215/446215 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30234 event pairs, 687 based on Foata normal form. 12/4942 useless extension candidates. Maximal degree in co-relation 38996. Up to 4519 conditions per place. [2024-06-20 16:00:03,204 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 31 changer transitions 0/281 dead transitions. [2024-06-20 16:00:03,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 281 transitions, 3503 flow [2024-06-20 16:00:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:00:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:00:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 16:00:03,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 16:00:03,206 INFO L175 Difference]: Start difference. First operand has 230 places, 240 transitions, 2766 flow. Second operand 10 states and 187 transitions. [2024-06-20 16:00:03,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 281 transitions, 3503 flow [2024-06-20 16:00:03,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 281 transitions, 3416 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:00:03,831 INFO L231 Difference]: Finished difference. Result has 233 places, 243 transitions, 2848 flow [2024-06-20 16:00:03,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2848, PETRI_PLACES=233, PETRI_TRANSITIONS=243} [2024-06-20 16:00:03,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-20 16:00:03,832 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 243 transitions, 2848 flow [2024-06-20 16:00:03,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:03,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:03,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:03,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:00:03,833 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)] === [2024-06-20 16:00:03,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1691533089, now seen corresponding path program 1 times [2024-06-20 16:00:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:03,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667943708] [2024-06-20 16:00:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:04,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:04,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667943708] [2024-06-20 16:00:04,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667943708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:04,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:04,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:04,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399794755] [2024-06-20 16:00:04,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:04,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:04,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:04,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:04,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:04,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 243 transitions, 2848 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:04,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:04,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:04,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:05,521 INFO L124 PetriNetUnfolderBase]: 3143/5056 cut-off events. [2024-06-20 16:00:05,521 INFO L125 PetriNetUnfolderBase]: For 446703/446703 co-relation queries the response was YES. [2024-06-20 16:00:05,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40115 conditions, 5056 events. 3143/5056 cut-off events. For 446703/446703 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30562 event pairs, 740 based on Foata normal form. 2/5055 useless extension candidates. Maximal degree in co-relation 40008. Up to 4874 conditions per place. [2024-06-20 16:00:05,575 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 26 changer transitions 0/275 dead transitions. [2024-06-20 16:00:05,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 275 transitions, 3728 flow [2024-06-20 16:00:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:00:05,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-20 16:00:05,577 INFO L175 Difference]: Start difference. First operand has 233 places, 243 transitions, 2848 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:00:05,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 275 transitions, 3728 flow [2024-06-20 16:00:06,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 275 transitions, 3594 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-20 16:00:06,195 INFO L231 Difference]: Finished difference. Result has 232 places, 254 transitions, 2940 flow [2024-06-20 16:00:06,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2940, PETRI_PLACES=232, PETRI_TRANSITIONS=254} [2024-06-20 16:00:06,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-20 16:00:06,196 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 254 transitions, 2940 flow [2024-06-20 16:00:06,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:06,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:06,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:00:06,197 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)] === [2024-06-20 16:00:06,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash 267857493, now seen corresponding path program 2 times [2024-06-20 16:00:06,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:06,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928995168] [2024-06-20 16:00:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:06,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:06,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:06,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928995168] [2024-06-20 16:00:06,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928995168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:06,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:06,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402317431] [2024-06-20 16:00:06,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:06,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:06,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:06,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 254 transitions, 2940 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:06,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:06,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:06,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:07,826 INFO L124 PetriNetUnfolderBase]: 3153/5072 cut-off events. [2024-06-20 16:00:07,826 INFO L125 PetriNetUnfolderBase]: For 456751/456751 co-relation queries the response was YES. [2024-06-20 16:00:07,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40529 conditions, 5072 events. 3153/5072 cut-off events. For 456751/456751 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30677 event pairs, 740 based on Foata normal form. 2/5071 useless extension candidates. Maximal degree in co-relation 40422. Up to 4919 conditions per place. [2024-06-20 16:00:07,878 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 250 selfloop transitions, 20 changer transitions 0/274 dead transitions. [2024-06-20 16:00:07,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 274 transitions, 3602 flow [2024-06-20 16:00:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:00:07,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 16:00:07,879 INFO L175 Difference]: Start difference. First operand has 232 places, 254 transitions, 2940 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:00:07,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 274 transitions, 3602 flow [2024-06-20 16:00:08,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 274 transitions, 3491 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-20 16:00:08,396 INFO L231 Difference]: Finished difference. Result has 237 places, 258 transitions, 2950 flow [2024-06-20 16:00:08,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2950, PETRI_PLACES=237, PETRI_TRANSITIONS=258} [2024-06-20 16:00:08,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-20 16:00:08,396 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 258 transitions, 2950 flow [2024-06-20 16:00:08,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:08,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:08,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:08,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:00:08,397 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)] === [2024-06-20 16:00:08,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash 267865429, now seen corresponding path program 1 times [2024-06-20 16:00:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051030905] [2024-06-20 16:00:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:09,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:09,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051030905] [2024-06-20 16:00:09,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051030905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:09,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:09,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:09,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892375530] [2024-06-20 16:00:09,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:09,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:09,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:09,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:09,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 258 transitions, 2950 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:09,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:09,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:09,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:10,536 INFO L124 PetriNetUnfolderBase]: 3173/5102 cut-off events. [2024-06-20 16:00:10,537 INFO L125 PetriNetUnfolderBase]: For 472906/472906 co-relation queries the response was YES. [2024-06-20 16:00:10,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40790 conditions, 5102 events. 3173/5102 cut-off events. For 472906/472906 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30831 event pairs, 747 based on Foata normal form. 4/5103 useless extension candidates. Maximal degree in co-relation 40681. Up to 4851 conditions per place. [2024-06-20 16:00:10,592 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 41 changer transitions 0/285 dead transitions. [2024-06-20 16:00:10,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 285 transitions, 3814 flow [2024-06-20 16:00:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:00:10,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:00:10,594 INFO L175 Difference]: Start difference. First operand has 237 places, 258 transitions, 2950 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:00:10,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 285 transitions, 3814 flow [2024-06-20 16:00:11,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 285 transitions, 3756 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:11,417 INFO L231 Difference]: Finished difference. Result has 241 places, 264 transitions, 3078 flow [2024-06-20 16:00:11,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3078, PETRI_PLACES=241, PETRI_TRANSITIONS=264} [2024-06-20 16:00:11,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-20 16:00:11,418 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 264 transitions, 3078 flow [2024-06-20 16:00:11,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:11,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:11,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:11,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:00:11,418 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:11,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:11,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1330139097, now seen corresponding path program 7 times [2024-06-20 16:00:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:11,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425990405] [2024-06-20 16:00:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:11,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:12,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:12,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425990405] [2024-06-20 16:00:12,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425990405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:12,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:12,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:00:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119234438] [2024-06-20 16:00:12,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:12,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:00:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:12,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:00:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:00:12,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:12,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 264 transitions, 3078 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:12,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:12,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:12,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:14,223 INFO L124 PetriNetUnfolderBase]: 3153/5124 cut-off events. [2024-06-20 16:00:14,223 INFO L125 PetriNetUnfolderBase]: For 504448/504454 co-relation queries the response was YES. [2024-06-20 16:00:14,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41670 conditions, 5124 events. 3153/5124 cut-off events. For 504448/504454 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31564 event pairs, 727 based on Foata normal form. 16/5135 useless extension candidates. Maximal degree in co-relation 41560. Up to 4664 conditions per place. [2024-06-20 16:00:14,274 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 45 changer transitions 0/302 dead transitions. [2024-06-20 16:00:14,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 302 transitions, 3819 flow [2024-06-20 16:00:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:00:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:00:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 16:00:14,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 16:00:14,276 INFO L175 Difference]: Start difference. First operand has 241 places, 264 transitions, 3078 flow. Second operand 10 states and 187 transitions. [2024-06-20 16:00:14,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 302 transitions, 3819 flow [2024-06-20 16:00:14,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 302 transitions, 3750 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:14,985 INFO L231 Difference]: Finished difference. Result has 248 places, 267 transitions, 3182 flow [2024-06-20 16:00:14,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3182, PETRI_PLACES=248, PETRI_TRANSITIONS=267} [2024-06-20 16:00:14,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-20 16:00:14,986 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 267 transitions, 3182 flow [2024-06-20 16:00:14,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:14,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:14,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:14,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:00:14,986 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:14,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:14,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1322260299, now seen corresponding path program 8 times [2024-06-20 16:00:14,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:14,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981231259] [2024-06-20 16:00:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:14,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:16,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981231259] [2024-06-20 16:00:16,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981231259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:16,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:16,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:00:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859997052] [2024-06-20 16:00:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:00:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:00:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:00:16,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:16,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 267 transitions, 3182 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:16,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:16,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:16,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:17,651 INFO L124 PetriNetUnfolderBase]: 3133/5091 cut-off events. [2024-06-20 16:00:17,651 INFO L125 PetriNetUnfolderBase]: For 498304/498307 co-relation queries the response was YES. [2024-06-20 16:00:17,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41010 conditions, 5091 events. 3133/5091 cut-off events. For 498304/498307 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31354 event pairs, 693 based on Foata normal form. 14/5101 useless extension candidates. Maximal degree in co-relation 40897. Up to 4555 conditions per place. [2024-06-20 16:00:17,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 51 changer transitions 0/306 dead transitions. [2024-06-20 16:00:17,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 306 transitions, 3897 flow [2024-06-20 16:00:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:00:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:00:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 16:00:17,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 16:00:17,709 INFO L175 Difference]: Start difference. First operand has 248 places, 267 transitions, 3182 flow. Second operand 10 states and 188 transitions. [2024-06-20 16:00:17,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 306 transitions, 3897 flow [2024-06-20 16:00:18,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 306 transitions, 3772 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 16:00:18,716 INFO L231 Difference]: Finished difference. Result has 252 places, 270 transitions, 3210 flow [2024-06-20 16:00:18,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3057, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3210, PETRI_PLACES=252, PETRI_TRANSITIONS=270} [2024-06-20 16:00:18,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-20 16:00:18,717 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 270 transitions, 3210 flow [2024-06-20 16:00:18,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:18,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:18,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:18,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:00:18,717 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:18,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:18,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1496372877, now seen corresponding path program 9 times [2024-06-20 16:00:18,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:18,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727875454] [2024-06-20 16:00:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:18,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:20,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:20,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727875454] [2024-06-20 16:00:20,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727875454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:20,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:20,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:00:20,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370964186] [2024-06-20 16:00:20,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:20,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:00:20,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:00:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:00:20,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:20,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 270 transitions, 3210 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:20,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:20,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:20,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:21,245 INFO L124 PetriNetUnfolderBase]: 3113/5059 cut-off events. [2024-06-20 16:00:21,245 INFO L125 PetriNetUnfolderBase]: For 487588/487591 co-relation queries the response was YES. [2024-06-20 16:00:21,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40197 conditions, 5059 events. 3113/5059 cut-off events. For 487588/487591 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31129 event pairs, 699 based on Foata normal form. 14/5069 useless extension candidates. Maximal degree in co-relation 40082. Up to 4600 conditions per place. [2024-06-20 16:00:21,302 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 242 selfloop transitions, 45 changer transitions 0/305 dead transitions. [2024-06-20 16:00:21,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 305 transitions, 3794 flow [2024-06-20 16:00:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:00:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:00:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 16:00:21,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 16:00:21,303 INFO L175 Difference]: Start difference. First operand has 252 places, 270 transitions, 3210 flow. Second operand 10 states and 187 transitions. [2024-06-20 16:00:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 305 transitions, 3794 flow [2024-06-20 16:00:22,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 305 transitions, 3546 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-20 16:00:22,462 INFO L231 Difference]: Finished difference. Result has 253 places, 270 transitions, 2966 flow [2024-06-20 16:00:22,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2860, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2966, PETRI_PLACES=253, PETRI_TRANSITIONS=270} [2024-06-20 16:00:22,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-20 16:00:22,463 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 270 transitions, 2966 flow [2024-06-20 16:00:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:22,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:22,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:00:22,463 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)] === [2024-06-20 16:00:22,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2007957343, now seen corresponding path program 3 times [2024-06-20 16:00:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083904427] [2024-06-20 16:00:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:23,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:23,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083904427] [2024-06-20 16:00:23,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083904427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:23,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:23,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:23,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28905983] [2024-06-20 16:00:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:23,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:23,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:23,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:23,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:23,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:23,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 270 transitions, 2966 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:23,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:23,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:23,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:24,085 INFO L124 PetriNetUnfolderBase]: 3209/5164 cut-off events. [2024-06-20 16:00:24,085 INFO L125 PetriNetUnfolderBase]: For 476926/476929 co-relation queries the response was YES. [2024-06-20 16:00:24,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40263 conditions, 5164 events. 3209/5164 cut-off events. For 476926/476929 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31381 event pairs, 740 based on Foata normal form. 4/5164 useless extension candidates. Maximal degree in co-relation 40148. Up to 4919 conditions per place. [2024-06-20 16:00:24,142 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 250 selfloop transitions, 44 changer transitions 0/298 dead transitions. [2024-06-20 16:00:24,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 298 transitions, 4042 flow [2024-06-20 16:00:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:00:24,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-20 16:00:24,144 INFO L175 Difference]: Start difference. First operand has 253 places, 270 transitions, 2966 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:00:24,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 298 transitions, 4042 flow [2024-06-20 16:00:25,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 298 transitions, 3848 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-20 16:00:25,048 INFO L231 Difference]: Finished difference. Result has 250 places, 276 transitions, 2997 flow [2024-06-20 16:00:25,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2997, PETRI_PLACES=250, PETRI_TRANSITIONS=276} [2024-06-20 16:00:25,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-20 16:00:25,049 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 276 transitions, 2997 flow [2024-06-20 16:00:25,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:25,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:25,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:25,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:00:25,050 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)] === [2024-06-20 16:00:25,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:25,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1469681237, now seen corresponding path program 4 times [2024-06-20 16:00:25,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:25,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864129854] [2024-06-20 16:00:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:25,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:25,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:25,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864129854] [2024-06-20 16:00:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864129854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:25,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:25,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521047438] [2024-06-20 16:00:25,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:25,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:25,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:25,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:25,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 276 transitions, 2997 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:25,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:25,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:25,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:26,713 INFO L124 PetriNetUnfolderBase]: 3219/5180 cut-off events. [2024-06-20 16:00:26,713 INFO L125 PetriNetUnfolderBase]: For 489407/489410 co-relation queries the response was YES. [2024-06-20 16:00:26,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40505 conditions, 5180 events. 3219/5180 cut-off events. For 489407/489410 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31485 event pairs, 740 based on Foata normal form. 4/5180 useless extension candidates. Maximal degree in co-relation 40391. Up to 4929 conditions per place. [2024-06-20 16:00:26,770 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 48 changer transitions 0/297 dead transitions. [2024-06-20 16:00:26,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 297 transitions, 3867 flow [2024-06-20 16:00:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:00:26,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-20 16:00:26,771 INFO L175 Difference]: Start difference. First operand has 250 places, 276 transitions, 2997 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:00:26,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 297 transitions, 3867 flow [2024-06-20 16:00:27,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 297 transitions, 3706 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:27,892 INFO L231 Difference]: Finished difference. Result has 254 places, 279 transitions, 3006 flow [2024-06-20 16:00:27,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3006, PETRI_PLACES=254, PETRI_TRANSITIONS=279} [2024-06-20 16:00:27,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-20 16:00:27,892 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 279 transitions, 3006 flow [2024-06-20 16:00:27,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:27,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:27,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:27,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:00:27,893 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)] === [2024-06-20 16:00:27,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -947273673, now seen corresponding path program 5 times [2024-06-20 16:00:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379072224] [2024-06-20 16:00:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:28,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:28,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379072224] [2024-06-20 16:00:28,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379072224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:28,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:28,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672636640] [2024-06-20 16:00:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:28,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:28,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:28,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:28,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 279 transitions, 3006 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:28,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:28,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:28,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:29,584 INFO L124 PetriNetUnfolderBase]: 3213/5170 cut-off events. [2024-06-20 16:00:29,584 INFO L125 PetriNetUnfolderBase]: For 494742/494745 co-relation queries the response was YES. [2024-06-20 16:00:29,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40325 conditions, 5170 events. 3213/5170 cut-off events. For 494742/494745 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31420 event pairs, 736 based on Foata normal form. 4/5170 useless extension candidates. Maximal degree in co-relation 40209. Up to 5012 conditions per place. [2024-06-20 16:00:29,640 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 267 selfloop transitions, 19 changer transitions 0/290 dead transitions. [2024-06-20 16:00:29,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 290 transitions, 3617 flow [2024-06-20 16:00:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:00:29,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-20 16:00:29,641 INFO L175 Difference]: Start difference. First operand has 254 places, 279 transitions, 3006 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:00:29,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 290 transitions, 3617 flow [2024-06-20 16:00:30,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 290 transitions, 3515 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:30,637 INFO L231 Difference]: Finished difference. Result has 257 places, 279 transitions, 2948 flow [2024-06-20 16:00:30,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2948, PETRI_PLACES=257, PETRI_TRANSITIONS=279} [2024-06-20 16:00:30,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-20 16:00:30,638 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 279 transitions, 2948 flow [2024-06-20 16:00:30,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:30,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:30,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:30,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:00:30,638 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)] === [2024-06-20 16:00:30,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1795082469, now seen corresponding path program 6 times [2024-06-20 16:00:30,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:30,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632542681] [2024-06-20 16:00:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:30,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:31,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632542681] [2024-06-20 16:00:31,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632542681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:31,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:31,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:31,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775734131] [2024-06-20 16:00:31,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:31,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:31,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:31,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:31,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 279 transitions, 2948 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:31,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:31,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:31,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:32,347 INFO L124 PetriNetUnfolderBase]: 3207/5164 cut-off events. [2024-06-20 16:00:32,347 INFO L125 PetriNetUnfolderBase]: For 501611/501614 co-relation queries the response was YES. [2024-06-20 16:00:32,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40184 conditions, 5164 events. 3207/5164 cut-off events. For 501611/501614 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31373 event pairs, 735 based on Foata normal form. 4/5164 useless extension candidates. Maximal degree in co-relation 40067. Up to 4989 conditions per place. [2024-06-20 16:00:32,402 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 260 selfloop transitions, 27 changer transitions 0/291 dead transitions. [2024-06-20 16:00:32,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 291 transitions, 3571 flow [2024-06-20 16:00:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:00:32,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-20 16:00:32,403 INFO L175 Difference]: Start difference. First operand has 257 places, 279 transitions, 2948 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:00:32,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 291 transitions, 3571 flow [2024-06-20 16:00:33,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 291 transitions, 3488 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:33,396 INFO L231 Difference]: Finished difference. Result has 258 places, 279 transitions, 2925 flow [2024-06-20 16:00:33,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2925, PETRI_PLACES=258, PETRI_TRANSITIONS=279} [2024-06-20 16:00:33,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-20 16:00:33,397 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 279 transitions, 2925 flow [2024-06-20 16:00:33,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:33,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:33,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:00:33,397 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)] === [2024-06-20 16:00:33,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash 586809285, now seen corresponding path program 2 times [2024-06-20 16:00:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881817600] [2024-06-20 16:00:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:34,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:34,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881817600] [2024-06-20 16:00:34,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881817600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:34,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:34,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:34,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092834265] [2024-06-20 16:00:34,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:34,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:34,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:34,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:34,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 279 transitions, 2925 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:34,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:34,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:34,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:35,497 INFO L124 PetriNetUnfolderBase]: 3227/5187 cut-off events. [2024-06-20 16:00:35,498 INFO L125 PetriNetUnfolderBase]: For 519882/519882 co-relation queries the response was YES. [2024-06-20 16:00:35,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40522 conditions, 5187 events. 3227/5187 cut-off events. For 519882/519882 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31480 event pairs, 741 based on Foata normal form. 4/5185 useless extension candidates. Maximal degree in co-relation 40404. Up to 4924 conditions per place. [2024-06-20 16:00:35,553 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 43 changer transitions 0/300 dead transitions. [2024-06-20 16:00:35,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 300 transitions, 3793 flow [2024-06-20 16:00:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:00:35,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:00:35,554 INFO L175 Difference]: Start difference. First operand has 258 places, 279 transitions, 2925 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:00:35,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 300 transitions, 3793 flow [2024-06-20 16:00:36,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 300 transitions, 3691 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:00:36,679 INFO L231 Difference]: Finished difference. Result has 259 places, 282 transitions, 2965 flow [2024-06-20 16:00:36,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2965, PETRI_PLACES=259, PETRI_TRANSITIONS=282} [2024-06-20 16:00:36,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-20 16:00:36,679 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 282 transitions, 2965 flow [2024-06-20 16:00:36,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:36,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:36,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:36,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:00:36,680 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)] === [2024-06-20 16:00:36,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:36,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1621995209, now seen corresponding path program 3 times [2024-06-20 16:00:36,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:36,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817802287] [2024-06-20 16:00:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:37,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:37,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817802287] [2024-06-20 16:00:37,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817802287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:37,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:37,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:37,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023629110] [2024-06-20 16:00:37,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:37,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:37,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:37,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:37,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 282 transitions, 2965 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:37,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:37,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:37,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:38,749 INFO L124 PetriNetUnfolderBase]: 3247/5217 cut-off events. [2024-06-20 16:00:38,749 INFO L125 PetriNetUnfolderBase]: For 533237/533237 co-relation queries the response was YES. [2024-06-20 16:00:38,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40913 conditions, 5217 events. 3247/5217 cut-off events. For 533237/533237 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31693 event pairs, 739 based on Foata normal form. 4/5215 useless extension candidates. Maximal degree in co-relation 40795. Up to 4940 conditions per place. [2024-06-20 16:00:38,811 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 250 selfloop transitions, 48 changer transitions 0/302 dead transitions. [2024-06-20 16:00:38,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 302 transitions, 3835 flow [2024-06-20 16:00:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:00:38,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:00:38,813 INFO L175 Difference]: Start difference. First operand has 259 places, 282 transitions, 2965 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:00:38,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 302 transitions, 3835 flow [2024-06-20 16:00:39,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 302 transitions, 3690 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:39,960 INFO L231 Difference]: Finished difference. Result has 261 places, 285 transitions, 2978 flow [2024-06-20 16:00:39,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=261, PETRI_TRANSITIONS=285} [2024-06-20 16:00:39,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-20 16:00:39,960 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 285 transitions, 2978 flow [2024-06-20 16:00:39,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:39,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:39,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:39,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:00:39,961 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)] === [2024-06-20 16:00:39,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:39,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1621549739, now seen corresponding path program 4 times [2024-06-20 16:00:39,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:39,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100955303] [2024-06-20 16:00:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:39,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:40,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:40,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100955303] [2024-06-20 16:00:40,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100955303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:40,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:40,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:40,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807746284] [2024-06-20 16:00:40,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:40,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:40,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:40,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:40,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:40,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:00:40,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 285 transitions, 2978 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:40,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:40,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:00:40,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:41,951 INFO L124 PetriNetUnfolderBase]: 3235/5205 cut-off events. [2024-06-20 16:00:41,951 INFO L125 PetriNetUnfolderBase]: For 533234/533234 co-relation queries the response was YES. [2024-06-20 16:00:41,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40567 conditions, 5205 events. 3235/5205 cut-off events. For 533234/533234 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31646 event pairs, 727 based on Foata normal form. 4/5206 useless extension candidates. Maximal degree in co-relation 40448. Up to 5046 conditions per place. [2024-06-20 16:00:42,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 20 changer transitions 0/297 dead transitions. [2024-06-20 16:00:42,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 297 transitions, 3602 flow [2024-06-20 16:00:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:00:42,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:00:42,008 INFO L175 Difference]: Start difference. First operand has 261 places, 285 transitions, 2978 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:00:42,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 297 transitions, 3602 flow [2024-06-20 16:00:42,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 297 transitions, 3438 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:42,957 INFO L231 Difference]: Finished difference. Result has 263 places, 285 transitions, 2861 flow [2024-06-20 16:00:42,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2814, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2861, PETRI_PLACES=263, PETRI_TRANSITIONS=285} [2024-06-20 16:00:42,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-20 16:00:42,958 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 285 transitions, 2861 flow [2024-06-20 16:00:42,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:42,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:42,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:42,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:00:42,958 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)] === [2024-06-20 16:00:42,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:42,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1465879893, now seen corresponding path program 1 times [2024-06-20 16:00:42,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:42,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497319318] [2024-06-20 16:00:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:42,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:44,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497319318] [2024-06-20 16:00:44,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497319318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:44,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:44,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:44,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570452293] [2024-06-20 16:00:44,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:44,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:44,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:44,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:44,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 285 transitions, 2861 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:44,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:44,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:44,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:45,183 INFO L124 PetriNetUnfolderBase]: 3076/5030 cut-off events. [2024-06-20 16:00:45,184 INFO L125 PetriNetUnfolderBase]: For 456371/456371 co-relation queries the response was YES. [2024-06-20 16:00:45,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37532 conditions, 5030 events. 3076/5030 cut-off events. For 456371/456371 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31264 event pairs, 669 based on Foata normal form. 1/5017 useless extension candidates. Maximal degree in co-relation 37412. Up to 4794 conditions per place. [2024-06-20 16:00:45,238 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 278 selfloop transitions, 21 changer transitions 0/308 dead transitions. [2024-06-20 16:00:45,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 308 transitions, 3563 flow [2024-06-20 16:00:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:00:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:00:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:00:45,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:00:45,239 INFO L175 Difference]: Start difference. First operand has 263 places, 285 transitions, 2861 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:00:45,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 308 transitions, 3563 flow [2024-06-20 16:00:46,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 308 transitions, 3438 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-20 16:00:46,182 INFO L231 Difference]: Finished difference. Result has 261 places, 288 transitions, 2845 flow [2024-06-20 16:00:46,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2845, PETRI_PLACES=261, PETRI_TRANSITIONS=288} [2024-06-20 16:00:46,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-20 16:00:46,182 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 288 transitions, 2845 flow [2024-06-20 16:00:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:46,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:46,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:00:46,183 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)] === [2024-06-20 16:00:46,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1465970258, now seen corresponding path program 1 times [2024-06-20 16:00:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:46,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290660568] [2024-06-20 16:00:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:47,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290660568] [2024-06-20 16:00:47,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290660568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:47,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:47,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:47,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755570414] [2024-06-20 16:00:47,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:47,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:47,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:47,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:47,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 288 transitions, 2845 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:47,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:47,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:47,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:48,063 INFO L124 PetriNetUnfolderBase]: 3113/5089 cut-off events. [2024-06-20 16:00:48,063 INFO L125 PetriNetUnfolderBase]: For 470837/470837 co-relation queries the response was YES. [2024-06-20 16:00:48,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38093 conditions, 5089 events. 3113/5089 cut-off events. For 470837/470837 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 31665 event pairs, 676 based on Foata normal form. 2/5075 useless extension candidates. Maximal degree in co-relation 37975. Up to 4857 conditions per place. [2024-06-20 16:00:48,121 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 18 changer transitions 0/308 dead transitions. [2024-06-20 16:00:48,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 308 transitions, 3541 flow [2024-06-20 16:00:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:00:48,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:00:48,122 INFO L175 Difference]: Start difference. First operand has 261 places, 288 transitions, 2845 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:00:48,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 308 transitions, 3541 flow [2024-06-20 16:00:48,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 308 transitions, 3458 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 16:00:48,818 INFO L231 Difference]: Finished difference. Result has 262 places, 291 transitions, 2864 flow [2024-06-20 16:00:48,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2864, PETRI_PLACES=262, PETRI_TRANSITIONS=291} [2024-06-20 16:00:48,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-20 16:00:48,819 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 291 transitions, 2864 flow [2024-06-20 16:00:48,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:48,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:48,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:48,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:00:48,819 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)] === [2024-06-20 16:00:48,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:48,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1469694908, now seen corresponding path program 2 times [2024-06-20 16:00:48,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:48,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286824083] [2024-06-20 16:00:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:48,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:49,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:49,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286824083] [2024-06-20 16:00:49,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286824083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:49,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:49,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:49,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160426798] [2024-06-20 16:00:49,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:49,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:49,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:49,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 291 transitions, 2864 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:49,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:49,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:49,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:50,597 INFO L124 PetriNetUnfolderBase]: 3147/5138 cut-off events. [2024-06-20 16:00:50,597 INFO L125 PetriNetUnfolderBase]: For 491598/491598 co-relation queries the response was YES. [2024-06-20 16:00:50,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39101 conditions, 5138 events. 3147/5138 cut-off events. For 491598/491598 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31999 event pairs, 678 based on Foata normal form. 2/5126 useless extension candidates. Maximal degree in co-relation 38982. Up to 4824 conditions per place. [2024-06-20 16:00:50,656 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 262 selfloop transitions, 47 changer transitions 0/318 dead transitions. [2024-06-20 16:00:50,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 318 transitions, 4026 flow [2024-06-20 16:00:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:00:50,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:00:50,657 INFO L175 Difference]: Start difference. First operand has 262 places, 291 transitions, 2864 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:00:50,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 318 transitions, 4026 flow [2024-06-20 16:00:51,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 318 transitions, 3946 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:51,521 INFO L231 Difference]: Finished difference. Result has 264 places, 300 transitions, 3070 flow [2024-06-20 16:00:51,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3070, PETRI_PLACES=264, PETRI_TRANSITIONS=300} [2024-06-20 16:00:51,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-20 16:00:51,522 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 300 transitions, 3070 flow [2024-06-20 16:00:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:51,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:51,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:51,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:00:51,522 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)] === [2024-06-20 16:00:51,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1469689173, now seen corresponding path program 2 times [2024-06-20 16:00:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491610170] [2024-06-20 16:00:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:52,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491610170] [2024-06-20 16:00:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491610170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:52,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:52,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:52,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742623953] [2024-06-20 16:00:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:52,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:52,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:52,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 300 transitions, 3070 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:52,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:52,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:52,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:53,597 INFO L124 PetriNetUnfolderBase]: 3149/5141 cut-off events. [2024-06-20 16:00:53,597 INFO L125 PetriNetUnfolderBase]: For 501291/501291 co-relation queries the response was YES. [2024-06-20 16:00:53,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39544 conditions, 5141 events. 3149/5141 cut-off events. For 501291/501291 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32013 event pairs, 676 based on Foata normal form. 1/5128 useless extension candidates. Maximal degree in co-relation 39424. Up to 4896 conditions per place. [2024-06-20 16:00:53,656 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 30 changer transitions 0/316 dead transitions. [2024-06-20 16:00:53,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 316 transitions, 3778 flow [2024-06-20 16:00:53,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:00:53,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:00:53,657 INFO L175 Difference]: Start difference. First operand has 264 places, 300 transitions, 3070 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:00:53,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 316 transitions, 3778 flow [2024-06-20 16:00:54,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 316 transitions, 3691 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:54,437 INFO L231 Difference]: Finished difference. Result has 269 places, 303 transitions, 3117 flow [2024-06-20 16:00:54,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3117, PETRI_PLACES=269, PETRI_TRANSITIONS=303} [2024-06-20 16:00:54,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-20 16:00:54,438 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 303 transitions, 3117 flow [2024-06-20 16:00:54,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:54,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:54,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:54,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:00:54,438 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)] === [2024-06-20 16:00:54,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:54,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1469689328, now seen corresponding path program 3 times [2024-06-20 16:00:54,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:54,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515667617] [2024-06-20 16:00:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:54,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:55,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:55,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515667617] [2024-06-20 16:00:55,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515667617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:55,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:55,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:55,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231637898] [2024-06-20 16:00:55,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:55,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:55,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:55,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:55,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:55,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:55,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 303 transitions, 3117 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:55,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:55,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:55,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:56,283 INFO L124 PetriNetUnfolderBase]: 3146/5134 cut-off events. [2024-06-20 16:00:56,283 INFO L125 PetriNetUnfolderBase]: For 509832/509832 co-relation queries the response was YES. [2024-06-20 16:00:56,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39841 conditions, 5134 events. 3146/5134 cut-off events. For 509832/509832 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31998 event pairs, 676 based on Foata normal form. 2/5122 useless extension candidates. Maximal degree in co-relation 39719. Up to 4826 conditions per place. [2024-06-20 16:00:56,340 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 46 changer transitions 0/321 dead transitions. [2024-06-20 16:00:56,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 321 transitions, 3953 flow [2024-06-20 16:00:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:00:56,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:00:56,341 INFO L175 Difference]: Start difference. First operand has 269 places, 303 transitions, 3117 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:00:56,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 321 transitions, 3953 flow [2024-06-20 16:00:57,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 321 transitions, 3805 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:57,359 INFO L231 Difference]: Finished difference. Result has 271 places, 303 transitions, 3067 flow [2024-06-20 16:00:57,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3067, PETRI_PLACES=271, PETRI_TRANSITIONS=303} [2024-06-20 16:00:57,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 16:00:57,359 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 303 transitions, 3067 flow [2024-06-20 16:00:57,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:57,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:57,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:57,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:00:57,360 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)] === [2024-06-20 16:00:57,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash -941546082, now seen corresponding path program 4 times [2024-06-20 16:00:57,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:57,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462548279] [2024-06-20 16:00:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:57,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:58,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:58,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462548279] [2024-06-20 16:00:58,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462548279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:58,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:58,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:58,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724752253] [2024-06-20 16:00:58,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:58,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:58,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:58,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:58,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 303 transitions, 3067 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:00:58,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:58,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:58,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:59,215 INFO L124 PetriNetUnfolderBase]: 3169/5172 cut-off events. [2024-06-20 16:00:59,215 INFO L125 PetriNetUnfolderBase]: For 529068/529068 co-relation queries the response was YES. [2024-06-20 16:00:59,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40470 conditions, 5172 events. 3169/5172 cut-off events. For 529068/529068 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 32261 event pairs, 678 based on Foata normal form. 2/5158 useless extension candidates. Maximal degree in co-relation 40347. Up to 4904 conditions per place. [2024-06-20 16:00:59,278 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 283 selfloop transitions, 32 changer transitions 0/324 dead transitions. [2024-06-20 16:00:59,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 324 transitions, 4205 flow [2024-06-20 16:00:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:00:59,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:00:59,279 INFO L175 Difference]: Start difference. First operand has 271 places, 303 transitions, 3067 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:00:59,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 324 transitions, 4205 flow [2024-06-20 16:01:00,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 324 transitions, 4108 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:00,285 INFO L231 Difference]: Finished difference. Result has 273 places, 309 transitions, 3180 flow [2024-06-20 16:01:00,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3180, PETRI_PLACES=273, PETRI_TRANSITIONS=309} [2024-06-20 16:01:00,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-20 16:01:00,285 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 309 transitions, 3180 flow [2024-06-20 16:01:00,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:01:00,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:00,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:00,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:01:00,286 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)] === [2024-06-20 16:01:00,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1629168144, now seen corresponding path program 5 times [2024-06-20 16:01:00,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:00,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635625278] [2024-06-20 16:01:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:00,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:01,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:01,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635625278] [2024-06-20 16:01:01,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635625278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:01,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:01,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:01,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346599930] [2024-06-20 16:01:01,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:01,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:01,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:01,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:01,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:01,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:01,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 309 transitions, 3180 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:01:01,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:01,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:01,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:02,118 INFO L124 PetriNetUnfolderBase]: 3163/5166 cut-off events. [2024-06-20 16:01:02,118 INFO L125 PetriNetUnfolderBase]: For 533896/533896 co-relation queries the response was YES. [2024-06-20 16:01:02,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40310 conditions, 5166 events. 3163/5166 cut-off events. For 533896/533896 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32216 event pairs, 672 based on Foata normal form. 2/5154 useless extension candidates. Maximal degree in co-relation 40186. Up to 4899 conditions per place. [2024-06-20 16:01:02,176 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 33 changer transitions 0/323 dead transitions. [2024-06-20 16:01:02,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 323 transitions, 4012 flow [2024-06-20 16:01:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:01:02,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:01:02,177 INFO L175 Difference]: Start difference. First operand has 273 places, 309 transitions, 3180 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:01:02,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 323 transitions, 4012 flow [2024-06-20 16:01:03,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 323 transitions, 3823 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:03,284 INFO L231 Difference]: Finished difference. Result has 275 places, 309 transitions, 3063 flow [2024-06-20 16:01:03,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3063, PETRI_PLACES=275, PETRI_TRANSITIONS=309} [2024-06-20 16:01:03,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-20 16:01:03,285 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 309 transitions, 3063 flow [2024-06-20 16:01:03,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:01:03,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:03,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:03,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:01:03,285 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)] === [2024-06-20 16:01:03,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1613579703, now seen corresponding path program 3 times [2024-06-20 16:01:03,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:03,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064756671] [2024-06-20 16:01:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:04,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:04,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064756671] [2024-06-20 16:01:04,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064756671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:04,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:04,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:04,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318732274] [2024-06-20 16:01:04,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:04,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:04,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:04,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:04,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 309 transitions, 3063 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:01:04,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:04,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:04,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:05,303 INFO L124 PetriNetUnfolderBase]: 3160/5157 cut-off events. [2024-06-20 16:01:05,304 INFO L125 PetriNetUnfolderBase]: For 536618/536618 co-relation queries the response was YES. [2024-06-20 16:01:05,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40140 conditions, 5157 events. 3160/5157 cut-off events. For 536618/536618 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 32166 event pairs, 678 based on Foata normal form. 1/5144 useless extension candidates. Maximal degree in co-relation 40015. Up to 4939 conditions per place. [2024-06-20 16:01:05,362 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 295 selfloop transitions, 18 changer transitions 0/322 dead transitions. [2024-06-20 16:01:05,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 322 transitions, 3781 flow [2024-06-20 16:01:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:01:05,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:01:05,363 INFO L175 Difference]: Start difference. First operand has 275 places, 309 transitions, 3063 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:01:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 322 transitions, 3781 flow [2024-06-20 16:01:06,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 322 transitions, 3713 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:06,316 INFO L231 Difference]: Finished difference. Result has 277 places, 312 transitions, 3111 flow [2024-06-20 16:01:06,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3111, PETRI_PLACES=277, PETRI_TRANSITIONS=312} [2024-06-20 16:01:06,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 16:01:06,317 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 312 transitions, 3111 flow [2024-06-20 16:01:06,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:01:06,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:06,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:06,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:01:06,318 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)] === [2024-06-20 16:01:06,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1621810914, now seen corresponding path program 6 times [2024-06-20 16:01:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:06,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332435838] [2024-06-20 16:01:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:07,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:07,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332435838] [2024-06-20 16:01:07,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332435838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:07,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:07,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:07,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575939967] [2024-06-20 16:01:07,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:07,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:07,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:07,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:07,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 312 transitions, 3111 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:01:07,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:07,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:07,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:08,141 INFO L124 PetriNetUnfolderBase]: 3133/5115 cut-off events. [2024-06-20 16:01:08,141 INFO L125 PetriNetUnfolderBase]: For 542732/542732 co-relation queries the response was YES. [2024-06-20 16:01:08,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40033 conditions, 5115 events. 3133/5115 cut-off events. For 542732/542732 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31831 event pairs, 672 based on Foata normal form. 3/5104 useless extension candidates. Maximal degree in co-relation 39907. Up to 4884 conditions per place. [2024-06-20 16:01:08,201 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 20 changer transitions 0/324 dead transitions. [2024-06-20 16:01:08,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 324 transitions, 3773 flow [2024-06-20 16:01:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:01:08,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 16:01:08,203 INFO L175 Difference]: Start difference. First operand has 277 places, 312 transitions, 3111 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:01:08,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 324 transitions, 3773 flow [2024-06-20 16:01:09,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 324 transitions, 3637 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:09,365 INFO L231 Difference]: Finished difference. Result has 279 places, 312 transitions, 3021 flow [2024-06-20 16:01:09,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3021, PETRI_PLACES=279, PETRI_TRANSITIONS=312} [2024-06-20 16:01:09,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-20 16:01:09,365 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 312 transitions, 3021 flow [2024-06-20 16:01:09,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-20 16:01:09,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:09,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:09,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:01:09,366 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)] === [2024-06-20 16:01:09,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1621533867, now seen corresponding path program 1 times [2024-06-20 16:01:09,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:09,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465493745] [2024-06-20 16:01:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:09,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:10,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:10,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465493745] [2024-06-20 16:01:10,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465493745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:10,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:10,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:10,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239483690] [2024-06-20 16:01:10,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:10,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:10,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:10,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:10,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 312 transitions, 3021 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:10,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:10,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:10,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:11,517 INFO L124 PetriNetUnfolderBase]: 3311/5310 cut-off events. [2024-06-20 16:01:11,517 INFO L125 PetriNetUnfolderBase]: For 639772/639772 co-relation queries the response was YES. [2024-06-20 16:01:11,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43075 conditions, 5310 events. 3311/5310 cut-off events. For 639772/639772 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32139 event pairs, 733 based on Foata normal form. 2/5309 useless extension candidates. Maximal degree in co-relation 42948. Up to 5163 conditions per place. [2024-06-20 16:01:11,582 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 302 selfloop transitions, 19 changer transitions 0/325 dead transitions. [2024-06-20 16:01:11,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 325 transitions, 3739 flow [2024-06-20 16:01:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:01:11,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-20 16:01:11,583 INFO L175 Difference]: Start difference. First operand has 279 places, 312 transitions, 3021 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:01:11,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 325 transitions, 3739 flow [2024-06-20 16:01:12,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 325 transitions, 3674 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:01:12,859 INFO L231 Difference]: Finished difference. Result has 279 places, 314 transitions, 3053 flow [2024-06-20 16:01:12,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3053, PETRI_PLACES=279, PETRI_TRANSITIONS=314} [2024-06-20 16:01:12,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-20 16:01:12,859 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 314 transitions, 3053 flow [2024-06-20 16:01:12,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:12,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:12,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:12,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:01:12,860 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)] === [2024-06-20 16:01:12,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:12,860 INFO L85 PathProgramCache]: Analyzing trace with hash -579072597, now seen corresponding path program 1 times [2024-06-20 16:01:12,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:12,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060885477] [2024-06-20 16:01:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:12,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:13,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060885477] [2024-06-20 16:01:13,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060885477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:13,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:13,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:13,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863002082] [2024-06-20 16:01:13,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:13,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:13,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:14,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:14,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 314 transitions, 3053 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:14,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:14,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:14,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:15,131 INFO L124 PetriNetUnfolderBase]: 3369/5398 cut-off events. [2024-06-20 16:01:15,131 INFO L125 PetriNetUnfolderBase]: For 653305/653307 co-relation queries the response was YES. [2024-06-20 16:01:15,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43975 conditions, 5398 events. 3369/5398 cut-off events. For 653305/653307 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32616 event pairs, 739 based on Foata normal form. 3/5394 useless extension candidates. Maximal degree in co-relation 43847. Up to 5176 conditions per place. [2024-06-20 16:01:15,196 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 43 changer transitions 0/358 dead transitions. [2024-06-20 16:01:15,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 358 transitions, 4266 flow [2024-06-20 16:01:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:01:15,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:01:15,197 INFO L175 Difference]: Start difference. First operand has 279 places, 314 transitions, 3053 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:01:15,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 358 transitions, 4266 flow [2024-06-20 16:01:16,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 358 transitions, 4185 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:16,851 INFO L231 Difference]: Finished difference. Result has 284 places, 333 transitions, 3345 flow [2024-06-20 16:01:16,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3345, PETRI_PLACES=284, PETRI_TRANSITIONS=333} [2024-06-20 16:01:16,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-20 16:01:16,852 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 333 transitions, 3345 flow [2024-06-20 16:01:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:16,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:16,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:16,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:01:16,852 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)] === [2024-06-20 16:01:16,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash -296302377, now seen corresponding path program 2 times [2024-06-20 16:01:16,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:16,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673821652] [2024-06-20 16:01:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:16,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:17,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:17,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673821652] [2024-06-20 16:01:17,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673821652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:17,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:17,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:17,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698006852] [2024-06-20 16:01:17,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:17,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:17,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:17,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:17,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:17,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 333 transitions, 3345 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:17,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:17,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:17,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:19,011 INFO L124 PetriNetUnfolderBase]: 3389/5434 cut-off events. [2024-06-20 16:01:19,011 INFO L125 PetriNetUnfolderBase]: For 674930/674934 co-relation queries the response was YES. [2024-06-20 16:01:19,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44854 conditions, 5434 events. 3389/5434 cut-off events. For 674930/674934 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 32881 event pairs, 736 based on Foata normal form. 6/5437 useless extension candidates. Maximal degree in co-relation 44723. Up to 5214 conditions per place. [2024-06-20 16:01:19,223 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 314 selfloop transitions, 48 changer transitions 0/366 dead transitions. [2024-06-20 16:01:19,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 366 transitions, 4340 flow [2024-06-20 16:01:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:01:19,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:01:19,224 INFO L175 Difference]: Start difference. First operand has 284 places, 333 transitions, 3345 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:01:19,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 366 transitions, 4340 flow [2024-06-20 16:01:20,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 366 transitions, 4193 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-06-20 16:01:20,743 INFO L231 Difference]: Finished difference. Result has 290 places, 345 transitions, 3527 flow [2024-06-20 16:01:20,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3527, PETRI_PLACES=290, PETRI_TRANSITIONS=345} [2024-06-20 16:01:20,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-20 16:01:20,744 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 345 transitions, 3527 flow [2024-06-20 16:01:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:20,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:20,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:20,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:01:20,744 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)] === [2024-06-20 16:01:20,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -356430535, now seen corresponding path program 1 times [2024-06-20 16:01:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:20,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565883734] [2024-06-20 16:01:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:21,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:21,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565883734] [2024-06-20 16:01:21,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565883734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:21,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:21,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:21,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275800976] [2024-06-20 16:01:21,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:21,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:21,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:21,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:21,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:21,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 345 transitions, 3527 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:21,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:21,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:21,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:22,841 INFO L124 PetriNetUnfolderBase]: 3399/5450 cut-off events. [2024-06-20 16:01:22,841 INFO L125 PetriNetUnfolderBase]: For 691503/691507 co-relation queries the response was YES. [2024-06-20 16:01:22,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45561 conditions, 5450 events. 3399/5450 cut-off events. For 691503/691507 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33023 event pairs, 737 based on Foata normal form. 6/5453 useless extension candidates. Maximal degree in co-relation 45428. Up to 5227 conditions per place. [2024-06-20 16:01:22,904 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 27 changer transitions 0/371 dead transitions. [2024-06-20 16:01:22,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 371 transitions, 4413 flow [2024-06-20 16:01:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:01:22,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:01:22,906 INFO L175 Difference]: Start difference. First operand has 290 places, 345 transitions, 3527 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:01:22,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 371 transitions, 4413 flow [2024-06-20 16:01:24,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 371 transitions, 4258 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:24,441 INFO L231 Difference]: Finished difference. Result has 294 places, 348 transitions, 3520 flow [2024-06-20 16:01:24,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3520, PETRI_PLACES=294, PETRI_TRANSITIONS=348} [2024-06-20 16:01:24,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-20 16:01:24,441 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 348 transitions, 3520 flow [2024-06-20 16:01:24,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:24,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:24,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:24,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:01:24,442 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)] === [2024-06-20 16:01:24,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2077351687, now seen corresponding path program 2 times [2024-06-20 16:01:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:24,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762643901] [2024-06-20 16:01:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:24,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:25,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:25,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762643901] [2024-06-20 16:01:25,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762643901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:25,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:25,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980130379] [2024-06-20 16:01:25,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:25,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:25,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:25,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:25,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:25,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:25,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 348 transitions, 3520 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:25,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:25,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:25,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:26,541 INFO L124 PetriNetUnfolderBase]: 3510/5619 cut-off events. [2024-06-20 16:01:26,541 INFO L125 PetriNetUnfolderBase]: For 718263/718266 co-relation queries the response was YES. [2024-06-20 16:01:26,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47338 conditions, 5619 events. 3510/5619 cut-off events. For 718263/718266 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34126 event pairs, 739 based on Foata normal form. 4/5618 useless extension candidates. Maximal degree in co-relation 47204. Up to 5335 conditions per place. [2024-06-20 16:01:26,609 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 348 selfloop transitions, 50 changer transitions 0/402 dead transitions. [2024-06-20 16:01:26,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 402 transitions, 5048 flow [2024-06-20 16:01:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:01:26,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:01:26,610 INFO L175 Difference]: Start difference. First operand has 294 places, 348 transitions, 3520 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:01:26,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 402 transitions, 5048 flow [2024-06-20 16:01:28,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 402 transitions, 4822 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:28,108 INFO L231 Difference]: Finished difference. Result has 300 places, 375 transitions, 3919 flow [2024-06-20 16:01:28,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3919, PETRI_PLACES=300, PETRI_TRANSITIONS=375} [2024-06-20 16:01:28,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-20 16:01:28,108 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 375 transitions, 3919 flow [2024-06-20 16:01:28,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:28,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:28,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:28,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:01:28,109 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)] === [2024-06-20 16:01:28,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:28,109 INFO L85 PathProgramCache]: Analyzing trace with hash -356310379, now seen corresponding path program 1 times [2024-06-20 16:01:28,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:28,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026636228] [2024-06-20 16:01:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:28,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:28,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:28,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026636228] [2024-06-20 16:01:28,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026636228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:28,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:28,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:28,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296820425] [2024-06-20 16:01:28,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:28,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:28,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:28,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:28,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:28,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:28,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 375 transitions, 3919 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:28,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:28,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:28,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:30,123 INFO L124 PetriNetUnfolderBase]: 3536/5657 cut-off events. [2024-06-20 16:01:30,123 INFO L125 PetriNetUnfolderBase]: For 746669/746669 co-relation queries the response was YES. [2024-06-20 16:01:30,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48310 conditions, 5657 events. 3536/5657 cut-off events. For 746669/746669 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34392 event pairs, 739 based on Foata normal form. 2/5656 useless extension candidates. Maximal degree in co-relation 48172. Up to 5348 conditions per place. [2024-06-20 16:01:30,206 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 53 changer transitions 0/410 dead transitions. [2024-06-20 16:01:30,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 410 transitions, 5164 flow [2024-06-20 16:01:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:01:30,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:01:30,207 INFO L175 Difference]: Start difference. First operand has 300 places, 375 transitions, 3919 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:01:30,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 410 transitions, 5164 flow [2024-06-20 16:01:31,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 410 transitions, 5034 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-20 16:01:31,825 INFO L231 Difference]: Finished difference. Result has 306 places, 388 transitions, 4117 flow [2024-06-20 16:01:31,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4117, PETRI_PLACES=306, PETRI_TRANSITIONS=388} [2024-06-20 16:01:31,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-20 16:01:31,826 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 388 transitions, 4117 flow [2024-06-20 16:01:31,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:31,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:31,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:31,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:01:31,826 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)] === [2024-06-20 16:01:31,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:31,826 INFO L85 PathProgramCache]: Analyzing trace with hash -286113855, now seen corresponding path program 2 times [2024-06-20 16:01:31,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:31,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308910156] [2024-06-20 16:01:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:31,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:32,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:32,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308910156] [2024-06-20 16:01:32,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308910156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:32,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:32,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:32,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145604266] [2024-06-20 16:01:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:32,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:32,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:32,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:32,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:32,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:32,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 388 transitions, 4117 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:32,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:32,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:32,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:33,810 INFO L124 PetriNetUnfolderBase]: 3546/5669 cut-off events. [2024-06-20 16:01:33,810 INFO L125 PetriNetUnfolderBase]: For 766148/766148 co-relation queries the response was YES. [2024-06-20 16:01:33,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49192 conditions, 5669 events. 3546/5669 cut-off events. For 766148/766148 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 34455 event pairs, 741 based on Foata normal form. 2/5668 useless extension candidates. Maximal degree in co-relation 49051. Up to 5463 conditions per place. [2024-06-20 16:01:33,884 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 369 selfloop transitions, 35 changer transitions 0/408 dead transitions. [2024-06-20 16:01:33,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 408 transitions, 5056 flow [2024-06-20 16:01:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:01:33,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:01:33,885 INFO L175 Difference]: Start difference. First operand has 306 places, 388 transitions, 4117 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:01:33,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 408 transitions, 5056 flow [2024-06-20 16:01:35,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 408 transitions, 4911 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-20 16:01:35,820 INFO L231 Difference]: Finished difference. Result has 311 places, 392 transitions, 4137 flow [2024-06-20 16:01:35,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4137, PETRI_PLACES=311, PETRI_TRANSITIONS=392} [2024-06-20 16:01:35,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-20 16:01:35,821 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 392 transitions, 4137 flow [2024-06-20 16:01:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:35,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:35,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:01:35,821 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)] === [2024-06-20 16:01:35,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash -286356027, now seen corresponding path program 3 times [2024-06-20 16:01:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748708802] [2024-06-20 16:01:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:36,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:36,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748708802] [2024-06-20 16:01:36,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748708802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:36,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:36,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:36,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61855112] [2024-06-20 16:01:36,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:36,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:37,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:37,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 392 transitions, 4137 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:37,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:37,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:37,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:38,409 INFO L124 PetriNetUnfolderBase]: 3556/5684 cut-off events. [2024-06-20 16:01:38,409 INFO L125 PetriNetUnfolderBase]: For 779928/779928 co-relation queries the response was YES. [2024-06-20 16:01:38,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49273 conditions, 5684 events. 3556/5684 cut-off events. For 779928/779928 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34562 event pairs, 735 based on Foata normal form. 2/5683 useless extension candidates. Maximal degree in co-relation 49130. Up to 5450 conditions per place. [2024-06-20 16:01:38,475 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 363 selfloop transitions, 46 changer transitions 0/413 dead transitions. [2024-06-20 16:01:38,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 413 transitions, 5130 flow [2024-06-20 16:01:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:01:38,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 16:01:38,476 INFO L175 Difference]: Start difference. First operand has 311 places, 392 transitions, 4137 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:01:38,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 413 transitions, 5130 flow [2024-06-20 16:01:40,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 413 transitions, 5031 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:40,639 INFO L231 Difference]: Finished difference. Result has 314 places, 398 transitions, 4289 flow [2024-06-20 16:01:40,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4289, PETRI_PLACES=314, PETRI_TRANSITIONS=398} [2024-06-20 16:01:40,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 16:01:40,640 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 398 transitions, 4289 flow [2024-06-20 16:01:40,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:40,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:40,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:40,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:01:40,640 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)] === [2024-06-20 16:01:40,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash -286351191, now seen corresponding path program 3 times [2024-06-20 16:01:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178937053] [2024-06-20 16:01:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:40,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:41,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:41,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178937053] [2024-06-20 16:01:41,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178937053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:41,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:41,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276940808] [2024-06-20 16:01:41,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:41,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:41,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:41,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 398 transitions, 4289 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:41,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:41,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:41,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:42,765 INFO L124 PetriNetUnfolderBase]: 3576/5713 cut-off events. [2024-06-20 16:01:42,765 INFO L125 PetriNetUnfolderBase]: For 808326/808326 co-relation queries the response was YES. [2024-06-20 16:01:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50184 conditions, 5713 events. 3576/5713 cut-off events. For 808326/808326 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34761 event pairs, 740 based on Foata normal form. 4/5714 useless extension candidates. Maximal degree in co-relation 50040. Up to 5497 conditions per place. [2024-06-20 16:01:42,836 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 34 changer transitions 0/421 dead transitions. [2024-06-20 16:01:42,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 421 transitions, 5354 flow [2024-06-20 16:01:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:01:42,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 16:01:42,837 INFO L175 Difference]: Start difference. First operand has 314 places, 398 transitions, 4289 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:01:42,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 421 transitions, 5354 flow [2024-06-20 16:01:45,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 421 transitions, 5150 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:45,721 INFO L231 Difference]: Finished difference. Result has 316 places, 404 transitions, 4347 flow [2024-06-20 16:01:45,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4347, PETRI_PLACES=316, PETRI_TRANSITIONS=404} [2024-06-20 16:01:45,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-20 16:01:45,722 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 404 transitions, 4347 flow [2024-06-20 16:01:45,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:45,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:45,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:45,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:01:45,723 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)] === [2024-06-20 16:01:45,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash -286351005, now seen corresponding path program 3 times [2024-06-20 16:01:45,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:45,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082851220] [2024-06-20 16:01:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:45,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082851220] [2024-06-20 16:01:46,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082851220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:46,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:46,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:46,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001690647] [2024-06-20 16:01:46,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:46,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:46,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:46,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:46,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 404 transitions, 4347 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:46,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:46,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:46,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:48,021 INFO L124 PetriNetUnfolderBase]: 3586/5727 cut-off events. [2024-06-20 16:01:48,021 INFO L125 PetriNetUnfolderBase]: For 818179/818179 co-relation queries the response was YES. [2024-06-20 16:01:48,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50743 conditions, 5727 events. 3586/5727 cut-off events. For 818179/818179 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34827 event pairs, 743 based on Foata normal form. 2/5726 useless extension candidates. Maximal degree in co-relation 50598. Up to 5495 conditions per place. [2024-06-20 16:01:48,102 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 41 changer transitions 0/424 dead transitions. [2024-06-20 16:01:48,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 424 transitions, 5291 flow [2024-06-20 16:01:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:01:48,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:01:48,103 INFO L175 Difference]: Start difference. First operand has 316 places, 404 transitions, 4347 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:01:48,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 424 transitions, 5291 flow [2024-06-20 16:01:50,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 424 transitions, 5084 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:50,991 INFO L231 Difference]: Finished difference. Result has 318 places, 407 transitions, 4281 flow [2024-06-20 16:01:50,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4140, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4281, PETRI_PLACES=318, PETRI_TRANSITIONS=407} [2024-06-20 16:01:50,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-20 16:01:50,992 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 407 transitions, 4281 flow [2024-06-20 16:01:50,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:50,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:50,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:50,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:01:50,992 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)] === [2024-06-20 16:01:50,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash -581932533, now seen corresponding path program 1 times [2024-06-20 16:01:50,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:50,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696474595] [2024-06-20 16:01:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:52,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:52,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696474595] [2024-06-20 16:01:52,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696474595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:52,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:52,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:52,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598677327] [2024-06-20 16:01:52,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:52,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:52,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:52,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:52,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 407 transitions, 4281 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:52,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:52,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:52,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:53,488 INFO L124 PetriNetUnfolderBase]: 3594/5735 cut-off events. [2024-06-20 16:01:53,488 INFO L125 PetriNetUnfolderBase]: For 833632/833632 co-relation queries the response was YES. [2024-06-20 16:01:53,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50836 conditions, 5735 events. 3594/5735 cut-off events. For 833632/833632 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34733 event pairs, 628 based on Foata normal form. 2/5734 useless extension candidates. Maximal degree in co-relation 50690. Up to 5449 conditions per place. [2024-06-20 16:01:53,565 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 385 selfloop transitions, 48 changer transitions 0/437 dead transitions. [2024-06-20 16:01:53,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 437 transitions, 5509 flow [2024-06-20 16:01:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:01:53,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:01:53,566 INFO L175 Difference]: Start difference. First operand has 318 places, 407 transitions, 4281 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:01:53,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 437 transitions, 5509 flow [2024-06-20 16:01:56,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 437 transitions, 5398 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:56,653 INFO L231 Difference]: Finished difference. Result has 320 places, 411 transitions, 4379 flow [2024-06-20 16:01:56,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4379, PETRI_PLACES=320, PETRI_TRANSITIONS=411} [2024-06-20 16:01:56,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 16:01:56,653 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 411 transitions, 4379 flow [2024-06-20 16:01:56,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:56,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:56,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:56,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:01:56,654 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)] === [2024-06-20 16:01:56,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash -581693523, now seen corresponding path program 2 times [2024-06-20 16:01:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:56,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761408027] [2024-06-20 16:01:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:57,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:57,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761408027] [2024-06-20 16:01:57,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761408027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:57,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:57,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:57,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842744810] [2024-06-20 16:01:57,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:57,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:57,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:57,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:57,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:01:57,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 411 transitions, 4379 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:57,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:57,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:01:57,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:59,144 INFO L124 PetriNetUnfolderBase]: 3602/5747 cut-off events. [2024-06-20 16:01:59,144 INFO L125 PetriNetUnfolderBase]: For 849825/849825 co-relation queries the response was YES. [2024-06-20 16:01:59,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51235 conditions, 5747 events. 3602/5747 cut-off events. For 849825/849825 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 34933 event pairs, 741 based on Foata normal form. 2/5746 useless extension candidates. Maximal degree in co-relation 51088. Up to 5514 conditions per place. [2024-06-20 16:01:59,225 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 385 selfloop transitions, 45 changer transitions 0/434 dead transitions. [2024-06-20 16:01:59,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 434 transitions, 5349 flow [2024-06-20 16:01:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:01:59,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:01:59,226 INFO L175 Difference]: Start difference. First operand has 320 places, 411 transitions, 4379 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:01:59,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 434 transitions, 5349 flow [2024-06-20 16:02:02,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 434 transitions, 5213 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:02,492 INFO L231 Difference]: Finished difference. Result has 324 places, 413 transitions, 4399 flow [2024-06-20 16:02:02,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4261, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4399, PETRI_PLACES=324, PETRI_TRANSITIONS=413} [2024-06-20 16:02:02,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-20 16:02:02,493 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 413 transitions, 4399 flow [2024-06-20 16:02:02,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:02,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:02,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:02,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:02:02,493 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)] === [2024-06-20 16:02:02,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash -442821277, now seen corresponding path program 3 times [2024-06-20 16:02:02,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:02,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941687287] [2024-06-20 16:02:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:02,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:03,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941687287] [2024-06-20 16:02:03,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941687287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:03,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:03,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588859172] [2024-06-20 16:02:03,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:03,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:03,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:03,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:03,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 413 transitions, 4399 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:03,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:03,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:03,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:04,957 INFO L124 PetriNetUnfolderBase]: 3610/5760 cut-off events. [2024-06-20 16:02:04,957 INFO L125 PetriNetUnfolderBase]: For 866437/866437 co-relation queries the response was YES. [2024-06-20 16:02:05,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51432 conditions, 5760 events. 3610/5760 cut-off events. For 866437/866437 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34996 event pairs, 737 based on Foata normal form. 2/5759 useless extension candidates. Maximal degree in co-relation 51283. Up to 5526 conditions per place. [2024-06-20 16:02:05,036 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 385 selfloop transitions, 42 changer transitions 0/431 dead transitions. [2024-06-20 16:02:05,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 431 transitions, 5335 flow [2024-06-20 16:02:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:02:05,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 16:02:05,037 INFO L175 Difference]: Start difference. First operand has 324 places, 413 transitions, 4399 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:02:05,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 431 transitions, 5335 flow [2024-06-20 16:02:08,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 431 transitions, 5219 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:08,220 INFO L231 Difference]: Finished difference. Result has 326 places, 415 transitions, 4419 flow [2024-06-20 16:02:08,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4283, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4419, PETRI_PLACES=326, PETRI_TRANSITIONS=415} [2024-06-20 16:02:08,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-20 16:02:08,221 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 415 transitions, 4419 flow [2024-06-20 16:02:08,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:08,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:08,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:08,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:02:08,221 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)] === [2024-06-20 16:02:08,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:08,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2038903801, now seen corresponding path program 4 times [2024-06-20 16:02:08,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:08,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11835010] [2024-06-20 16:02:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:08,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:09,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:09,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11835010] [2024-06-20 16:02:09,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11835010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:09,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:09,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:09,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316580612] [2024-06-20 16:02:09,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:09,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:09,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:09,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:09,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:09,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:09,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 415 transitions, 4419 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:09,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:09,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:09,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:10,395 INFO L124 PetriNetUnfolderBase]: 3620/5781 cut-off events. [2024-06-20 16:02:10,395 INFO L125 PetriNetUnfolderBase]: For 883445/883451 co-relation queries the response was YES. [2024-06-20 16:02:10,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51753 conditions, 5781 events. 3620/5781 cut-off events. For 883445/883451 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 35210 event pairs, 742 based on Foata normal form. 6/5780 useless extension candidates. Maximal degree in co-relation 51603. Up to 5420 conditions per place. [2024-06-20 16:02:10,471 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 58 changer transitions 0/438 dead transitions. [2024-06-20 16:02:10,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 438 transitions, 5451 flow [2024-06-20 16:02:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:02:10,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:02:10,472 INFO L175 Difference]: Start difference. First operand has 326 places, 415 transitions, 4419 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:02:10,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 438 transitions, 5451 flow [2024-06-20 16:02:13,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 438 transitions, 5337 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:13,894 INFO L231 Difference]: Finished difference. Result has 328 places, 418 transitions, 4541 flow [2024-06-20 16:02:13,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4541, PETRI_PLACES=328, PETRI_TRANSITIONS=418} [2024-06-20 16:02:13,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-20 16:02:13,895 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 418 transitions, 4541 flow [2024-06-20 16:02:13,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:13,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:13,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:13,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:02:13,896 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)] === [2024-06-20 16:02:13,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1696485241, now seen corresponding path program 5 times [2024-06-20 16:02:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:13,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075291728] [2024-06-20 16:02:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:13,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:14,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:14,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075291728] [2024-06-20 16:02:14,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075291728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:14,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:14,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832696412] [2024-06-20 16:02:14,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:14,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:14,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:14,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 418 transitions, 4541 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:14,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:14,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:14,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:16,154 INFO L124 PetriNetUnfolderBase]: 3670/5852 cut-off events. [2024-06-20 16:02:16,154 INFO L125 PetriNetUnfolderBase]: For 933232/933238 co-relation queries the response was YES. [2024-06-20 16:02:16,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53870 conditions, 5852 events. 3670/5852 cut-off events. For 933232/933238 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35661 event pairs, 745 based on Foata normal form. 6/5851 useless extension candidates. Maximal degree in co-relation 53719. Up to 5302 conditions per place. [2024-06-20 16:02:16,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 113 changer transitions 0/453 dead transitions. [2024-06-20 16:02:16,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 453 transitions, 6573 flow [2024-06-20 16:02:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:02:16,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:02:16,411 INFO L175 Difference]: Start difference. First operand has 328 places, 418 transitions, 4541 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:02:16,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 453 transitions, 6573 flow [2024-06-20 16:02:19,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 453 transitions, 6363 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:19,640 INFO L231 Difference]: Finished difference. Result has 330 places, 430 transitions, 5017 flow [2024-06-20 16:02:19,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5017, PETRI_PLACES=330, PETRI_TRANSITIONS=430} [2024-06-20 16:02:19,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-20 16:02:19,641 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 430 transitions, 5017 flow [2024-06-20 16:02:19,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:19,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:19,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:19,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:02:19,642 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)] === [2024-06-20 16:02:19,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2032647691, now seen corresponding path program 6 times [2024-06-20 16:02:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:19,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734066321] [2024-06-20 16:02:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:20,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:20,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734066321] [2024-06-20 16:02:20,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734066321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:20,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:20,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:20,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290341115] [2024-06-20 16:02:20,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:20,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:20,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:20,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:20,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:20,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 430 transitions, 5017 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:20,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:20,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:22,026 INFO L124 PetriNetUnfolderBase]: 3680/5866 cut-off events. [2024-06-20 16:02:22,026 INFO L125 PetriNetUnfolderBase]: For 957250/957256 co-relation queries the response was YES. [2024-06-20 16:02:22,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54675 conditions, 5866 events. 3680/5866 cut-off events. For 957250/957256 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35720 event pairs, 746 based on Foata normal form. 6/5865 useless extension candidates. Maximal degree in co-relation 54523. Up to 5463 conditions per place. [2024-06-20 16:02:22,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 75 changer transitions 0/459 dead transitions. [2024-06-20 16:02:22,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 459 transitions, 6336 flow [2024-06-20 16:02:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:02:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:02:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 16:02:22,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-20 16:02:22,100 INFO L175 Difference]: Start difference. First operand has 330 places, 430 transitions, 5017 flow. Second operand 10 states and 171 transitions. [2024-06-20 16:02:22,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 459 transitions, 6336 flow [2024-06-20 16:02:25,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 459 transitions, 6040 flow, removed 138 selfloop flow, removed 2 redundant places. [2024-06-20 16:02:25,906 INFO L231 Difference]: Finished difference. Result has 339 places, 433 transitions, 5006 flow [2024-06-20 16:02:25,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4751, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5006, PETRI_PLACES=339, PETRI_TRANSITIONS=433} [2024-06-20 16:02:25,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-20 16:02:25,907 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 433 transitions, 5006 flow [2024-06-20 16:02:25,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:25,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:25,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:25,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:02:25,908 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)] === [2024-06-20 16:02:25,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2038783645, now seen corresponding path program 4 times [2024-06-20 16:02:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:25,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166461979] [2024-06-20 16:02:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:25,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:26,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:26,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166461979] [2024-06-20 16:02:26,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166461979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:26,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:26,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:26,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644442181] [2024-06-20 16:02:26,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:26,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:26,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:26,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:26,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 433 transitions, 5006 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:26,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:26,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:26,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:28,158 INFO L124 PetriNetUnfolderBase]: 3698/5895 cut-off events. [2024-06-20 16:02:28,159 INFO L125 PetriNetUnfolderBase]: For 976755/976761 co-relation queries the response was YES. [2024-06-20 16:02:28,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55042 conditions, 5895 events. 3698/5895 cut-off events. For 976755/976761 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35969 event pairs, 742 based on Foata normal form. 6/5894 useless extension candidates. Maximal degree in co-relation 54887. Up to 5477 conditions per place. [2024-06-20 16:02:28,242 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 384 selfloop transitions, 81 changer transitions 0/469 dead transitions. [2024-06-20 16:02:28,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 469 transitions, 6634 flow [2024-06-20 16:02:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:02:28,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:02:28,244 INFO L175 Difference]: Start difference. First operand has 339 places, 433 transitions, 5006 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:02:28,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 469 transitions, 6634 flow [2024-06-20 16:02:31,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 469 transitions, 6459 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 16:02:31,865 INFO L231 Difference]: Finished difference. Result has 340 places, 446 transitions, 5267 flow [2024-06-20 16:02:31,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5267, PETRI_PLACES=340, PETRI_TRANSITIONS=446} [2024-06-20 16:02:31,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-20 16:02:31,866 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 446 transitions, 5267 flow [2024-06-20 16:02:31,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:31,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:31,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:31,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:02:31,866 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)] === [2024-06-20 16:02:31,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1390383807, now seen corresponding path program 7 times [2024-06-20 16:02:31,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:31,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652132756] [2024-06-20 16:02:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:32,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:32,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652132756] [2024-06-20 16:02:32,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652132756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:32,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:32,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:32,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213693951] [2024-06-20 16:02:32,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:32,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:32,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:32,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:32,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 446 transitions, 5267 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:32,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:32,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:32,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:34,233 INFO L124 PetriNetUnfolderBase]: 3692/5883 cut-off events. [2024-06-20 16:02:34,233 INFO L125 PetriNetUnfolderBase]: For 989248/989254 co-relation queries the response was YES. [2024-06-20 16:02:34,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55445 conditions, 5883 events. 3692/5883 cut-off events. For 989248/989254 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35849 event pairs, 738 based on Foata normal form. 6/5882 useless extension candidates. Maximal degree in co-relation 55288. Up to 5483 conditions per place. [2024-06-20 16:02:34,306 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 74 changer transitions 0/465 dead transitions. [2024-06-20 16:02:34,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 465 transitions, 6254 flow [2024-06-20 16:02:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:02:34,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:02:34,307 INFO L175 Difference]: Start difference. First operand has 340 places, 446 transitions, 5267 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:02:34,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 465 transitions, 6254 flow [2024-06-20 16:02:38,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 465 transitions, 6047 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:38,603 INFO L231 Difference]: Finished difference. Result has 345 places, 446 transitions, 5214 flow [2024-06-20 16:02:38,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5214, PETRI_PLACES=345, PETRI_TRANSITIONS=446} [2024-06-20 16:02:38,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-20 16:02:38,603 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 446 transitions, 5214 flow [2024-06-20 16:02:38,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:38,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:38,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:38,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:02:38,603 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)] === [2024-06-20 16:02:38,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1275092637, now seen corresponding path program 8 times [2024-06-20 16:02:38,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:38,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750711528] [2024-06-20 16:02:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:38,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:39,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:39,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750711528] [2024-06-20 16:02:39,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750711528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:39,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:39,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:39,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241694587] [2024-06-20 16:02:39,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:39,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:39,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:39,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:39,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:39,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 446 transitions, 5214 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:39,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:39,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:39,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:40,860 INFO L124 PetriNetUnfolderBase]: 3718/5925 cut-off events. [2024-06-20 16:02:40,860 INFO L125 PetriNetUnfolderBase]: For 1017582/1017588 co-relation queries the response was YES. [2024-06-20 16:02:40,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56254 conditions, 5925 events. 3718/5925 cut-off events. For 1017582/1017588 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 36190 event pairs, 740 based on Foata normal form. 6/5924 useless extension candidates. Maximal degree in co-relation 56095. Up to 5357 conditions per place. [2024-06-20 16:02:40,937 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 132 changer transitions 0/471 dead transitions. [2024-06-20 16:02:40,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 471 transitions, 6828 flow [2024-06-20 16:02:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:02:40,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:02:40,939 INFO L175 Difference]: Start difference. First operand has 345 places, 446 transitions, 5214 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:02:40,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 471 transitions, 6828 flow [2024-06-20 16:02:45,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 471 transitions, 6680 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:45,313 INFO L231 Difference]: Finished difference. Result has 346 places, 452 transitions, 5524 flow [2024-06-20 16:02:45,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5524, PETRI_PLACES=346, PETRI_TRANSITIONS=452} [2024-06-20 16:02:45,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-20 16:02:45,313 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 452 transitions, 5524 flow [2024-06-20 16:02:45,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:45,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:45,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:45,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:02:45,314 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)] === [2024-06-20 16:02:45,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1684104895, now seen corresponding path program 5 times [2024-06-20 16:02:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:45,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261619131] [2024-06-20 16:02:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:45,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261619131] [2024-06-20 16:02:46,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261619131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:46,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:46,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:46,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410389263] [2024-06-20 16:02:46,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:46,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:46,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:46,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:46,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 452 transitions, 5524 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:46,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:46,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:46,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:47,661 INFO L124 PetriNetUnfolderBase]: 3744/5961 cut-off events. [2024-06-20 16:02:47,661 INFO L125 PetriNetUnfolderBase]: For 1047586/1047592 co-relation queries the response was YES. [2024-06-20 16:02:47,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57045 conditions, 5961 events. 3744/5961 cut-off events. For 1047586/1047592 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 36404 event pairs, 736 based on Foata normal form. 6/5960 useless extension candidates. Maximal degree in co-relation 56885. Up to 5530 conditions per place. [2024-06-20 16:02:47,736 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 92 changer transitions 0/479 dead transitions. [2024-06-20 16:02:47,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 479 transitions, 7082 flow [2024-06-20 16:02:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:02:47,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:02:47,737 INFO L175 Difference]: Start difference. First operand has 346 places, 452 transitions, 5524 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:02:47,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 479 transitions, 7082 flow [2024-06-20 16:02:51,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 479 transitions, 6795 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:51,910 INFO L231 Difference]: Finished difference. Result has 349 places, 459 transitions, 5534 flow [2024-06-20 16:02:51,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5237, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5534, PETRI_PLACES=349, PETRI_TRANSITIONS=459} [2024-06-20 16:02:51,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-20 16:02:51,910 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 459 transitions, 5534 flow [2024-06-20 16:02:51,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:51,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:51,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:51,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:02:51,911 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)] === [2024-06-20 16:02:51,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:51,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1684520791, now seen corresponding path program 9 times [2024-06-20 16:02:51,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:51,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551434611] [2024-06-20 16:02:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:52,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:52,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551434611] [2024-06-20 16:02:52,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551434611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:52,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:52,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:52,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737121451] [2024-06-20 16:02:52,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:52,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:52,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:52,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:52,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:52,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:52,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 459 transitions, 5534 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:52,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:52,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:52,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:54,169 INFO L124 PetriNetUnfolderBase]: 3738/5957 cut-off events. [2024-06-20 16:02:54,169 INFO L125 PetriNetUnfolderBase]: For 1053589/1053595 co-relation queries the response was YES. [2024-06-20 16:02:54,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56631 conditions, 5957 events. 3738/5957 cut-off events. For 1053589/1053595 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 36424 event pairs, 737 based on Foata normal form. 6/5956 useless extension candidates. Maximal degree in co-relation 56471. Up to 5388 conditions per place. [2024-06-20 16:02:54,446 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 344 selfloop transitions, 130 changer transitions 0/478 dead transitions. [2024-06-20 16:02:54,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 478 transitions, 6982 flow [2024-06-20 16:02:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:02:54,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:02:54,447 INFO L175 Difference]: Start difference. First operand has 349 places, 459 transitions, 5534 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:02:54,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 478 transitions, 6982 flow [2024-06-20 16:02:57,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 478 transitions, 6812 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:57,712 INFO L231 Difference]: Finished difference. Result has 353 places, 459 transitions, 5630 flow [2024-06-20 16:02:57,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5364, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5630, PETRI_PLACES=353, PETRI_TRANSITIONS=459} [2024-06-20 16:02:57,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-20 16:02:57,713 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 459 transitions, 5630 flow [2024-06-20 16:02:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:57,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:57,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:02:57,714 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)] === [2024-06-20 16:02:57,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1684520605, now seen corresponding path program 6 times [2024-06-20 16:02:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:57,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413180312] [2024-06-20 16:02:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:57,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413180312] [2024-06-20 16:02:58,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413180312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:58,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:58,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337953380] [2024-06-20 16:02:58,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:58,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:58,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:02:58,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 459 transitions, 5630 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:58,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:58,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:02:58,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:59,878 INFO L124 PetriNetUnfolderBase]: 3732/5945 cut-off events. [2024-06-20 16:02:59,878 INFO L125 PetriNetUnfolderBase]: For 1055730/1055736 co-relation queries the response was YES. [2024-06-20 16:02:59,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56249 conditions, 5945 events. 3732/5945 cut-off events. For 1055730/1055736 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36349 event pairs, 739 based on Foata normal form. 6/5944 useless extension candidates. Maximal degree in co-relation 56088. Up to 5517 conditions per place. [2024-06-20 16:02:59,964 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 385 selfloop transitions, 89 changer transitions 0/478 dead transitions. [2024-06-20 16:02:59,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 478 transitions, 6871 flow [2024-06-20 16:02:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:02:59,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:02:59,965 INFO L175 Difference]: Start difference. First operand has 353 places, 459 transitions, 5630 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:02:59,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 478 transitions, 6871 flow [2024-06-20 16:03:03,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 478 transitions, 6575 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 16:03:03,093 INFO L231 Difference]: Finished difference. Result has 356 places, 459 transitions, 5518 flow [2024-06-20 16:03:03,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5518, PETRI_PLACES=356, PETRI_TRANSITIONS=459} [2024-06-20 16:03:03,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-20 16:03:03,094 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 459 transitions, 5518 flow [2024-06-20 16:03:03,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:03,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:03,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:03,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:03:03,094 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)] === [2024-06-20 16:03:03,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:03,095 INFO L85 PathProgramCache]: Analyzing trace with hash 876656997, now seen corresponding path program 10 times [2024-06-20 16:03:03,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:03,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558477673] [2024-06-20 16:03:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:03,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:03,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558477673] [2024-06-20 16:03:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558477673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:03,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:03,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:03,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366385825] [2024-06-20 16:03:03,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:03,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:03,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:03,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:04,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:03:04,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 459 transitions, 5518 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:04,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:04,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:03:04,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:05,512 INFO L124 PetriNetUnfolderBase]: 3742/5961 cut-off events. [2024-06-20 16:03:05,512 INFO L125 PetriNetUnfolderBase]: For 1072866/1072872 co-relation queries the response was YES. [2024-06-20 16:03:05,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56360 conditions, 5961 events. 3742/5961 cut-off events. For 1072866/1072872 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 36413 event pairs, 732 based on Foata normal form. 6/5960 useless extension candidates. Maximal degree in co-relation 56198. Up to 5685 conditions per place. [2024-06-20 16:03:05,597 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 420 selfloop transitions, 52 changer transitions 0/476 dead transitions. [2024-06-20 16:03:05,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 476 transitions, 6825 flow [2024-06-20 16:03:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:03:05,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:03:05,598 INFO L175 Difference]: Start difference. First operand has 356 places, 459 transitions, 5518 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:03:05,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 476 transitions, 6825 flow [2024-06-20 16:03:08,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 476 transitions, 6675 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 16:03:08,949 INFO L231 Difference]: Finished difference. Result has 359 places, 462 transitions, 5569 flow [2024-06-20 16:03:08,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5569, PETRI_PLACES=359, PETRI_TRANSITIONS=462} [2024-06-20 16:03:08,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-20 16:03:08,950 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 462 transitions, 5569 flow [2024-06-20 16:03:08,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:08,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:08,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:03:08,950 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)] === [2024-06-20 16:03:08,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:08,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1010853597, now seen corresponding path program 4 times [2024-06-20 16:03:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:08,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211764789] [2024-06-20 16:03:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:09,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211764789] [2024-06-20 16:03:09,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211764789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:09,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:09,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:10,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265962603] [2024-06-20 16:03:10,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:10,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:10,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:10,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:03:10,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 462 transitions, 5569 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:10,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:10,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:03:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:11,586 INFO L124 PetriNetUnfolderBase]: 3739/5946 cut-off events. [2024-06-20 16:03:11,586 INFO L125 PetriNetUnfolderBase]: For 1078845/1078845 co-relation queries the response was YES. [2024-06-20 16:03:11,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56279 conditions, 5946 events. 3739/5946 cut-off events. For 1078845/1078845 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 36170 event pairs, 754 based on Foata normal form. 1/5937 useless extension candidates. Maximal degree in co-relation 56116. Up to 5711 conditions per place. [2024-06-20 16:03:11,666 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 427 selfloop transitions, 41 changer transitions 0/472 dead transitions. [2024-06-20 16:03:11,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 472 transitions, 6529 flow [2024-06-20 16:03:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:03:11,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:03:11,667 INFO L175 Difference]: Start difference. First operand has 359 places, 462 transitions, 5569 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:03:11,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 472 transitions, 6529 flow [2024-06-20 16:03:17,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 472 transitions, 6262 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:17,053 INFO L231 Difference]: Finished difference. Result has 361 places, 462 transitions, 5390 flow [2024-06-20 16:03:17,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5302, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5390, PETRI_PLACES=361, PETRI_TRANSITIONS=462} [2024-06-20 16:03:17,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 16:03:17,053 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 462 transitions, 5390 flow [2024-06-20 16:03:17,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:17,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:17,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:17,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:03:17,054 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)] === [2024-06-20 16:03:17,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash 858013865, now seen corresponding path program 11 times [2024-06-20 16:03:17,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:17,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96522125] [2024-06-20 16:03:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:17,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:17,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:17,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96522125] [2024-06-20 16:03:17,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96522125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:17,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:17,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:17,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982488743] [2024-06-20 16:03:17,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:17,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:17,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:17,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:03:17,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 462 transitions, 5390 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:17,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:17,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:03:17,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:19,505 INFO L124 PetriNetUnfolderBase]: 3733/5947 cut-off events. [2024-06-20 16:03:19,505 INFO L125 PetriNetUnfolderBase]: For 1088052/1088058 co-relation queries the response was YES. [2024-06-20 16:03:19,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55918 conditions, 5947 events. 3733/5947 cut-off events. For 1088052/1088058 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 36323 event pairs, 741 based on Foata normal form. 6/5946 useless extension candidates. Maximal degree in co-relation 55754. Up to 5733 conditions per place. [2024-06-20 16:03:19,586 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 442 selfloop transitions, 28 changer transitions 0/474 dead transitions. [2024-06-20 16:03:19,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 474 transitions, 6374 flow [2024-06-20 16:03:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:03:19,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:03:19,587 INFO L175 Difference]: Start difference. First operand has 361 places, 462 transitions, 5390 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:03:19,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 474 transitions, 6374 flow [2024-06-20 16:03:24,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 474 transitions, 6207 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:24,699 INFO L231 Difference]: Finished difference. Result has 362 places, 462 transitions, 5285 flow [2024-06-20 16:03:24,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5223, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5285, PETRI_PLACES=362, PETRI_TRANSITIONS=462} [2024-06-20 16:03:24,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 16:03:24,699 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 462 transitions, 5285 flow [2024-06-20 16:03:24,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:24,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:24,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:03:24,700 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)] === [2024-06-20 16:03:24,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 858014051, now seen corresponding path program 7 times [2024-06-20 16:03:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:24,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901828435] [2024-06-20 16:03:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:25,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:25,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901828435] [2024-06-20 16:03:25,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901828435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:25,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:25,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565791029] [2024-06-20 16:03:25,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:25,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:25,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:25,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:03:25,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 462 transitions, 5285 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:25,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:25,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:03:25,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:26,935 INFO L124 PetriNetUnfolderBase]: 3743/5963 cut-off events. [2024-06-20 16:03:26,935 INFO L125 PetriNetUnfolderBase]: For 1105632/1105638 co-relation queries the response was YES. [2024-06-20 16:03:26,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56069 conditions, 5963 events. 3743/5963 cut-off events. For 1105632/1105638 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36451 event pairs, 741 based on Foata normal form. 6/5962 useless extension candidates. Maximal degree in co-relation 55904. Up to 5722 conditions per place. [2024-06-20 16:03:27,022 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 436 selfloop transitions, 38 changer transitions 0/478 dead transitions. [2024-06-20 16:03:27,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 478 transitions, 6565 flow [2024-06-20 16:03:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:03:27,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:03:27,023 INFO L175 Difference]: Start difference. First operand has 362 places, 462 transitions, 5285 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:03:27,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 478 transitions, 6565 flow [2024-06-20 16:03:32,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 478 transitions, 6503 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:32,783 INFO L231 Difference]: Finished difference. Result has 364 places, 465 transitions, 5369 flow [2024-06-20 16:03:32,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5223, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5369, PETRI_PLACES=364, PETRI_TRANSITIONS=465} [2024-06-20 16:03:32,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 16:03:32,783 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 465 transitions, 5369 flow [2024-06-20 16:03:32,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:32,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:32,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:32,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:03:32,784 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)] === [2024-06-20 16:03:32,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1263462431, now seen corresponding path program 8 times [2024-06-20 16:03:32,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:32,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811504146] [2024-06-20 16:03:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:33,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:33,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811504146] [2024-06-20 16:03:33,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811504146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:33,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:33,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:33,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336993535] [2024-06-20 16:03:33,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:33,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:33,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:33,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:03:33,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 465 transitions, 5369 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:33,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:33,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:03:33,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:35,097 INFO L124 PetriNetUnfolderBase]: 3753/5977 cut-off events. [2024-06-20 16:03:35,098 INFO L125 PetriNetUnfolderBase]: For 1124216/1124222 co-relation queries the response was YES. [2024-06-20 16:03:35,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56355 conditions, 5977 events. 3753/5977 cut-off events. For 1124216/1124222 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36496 event pairs, 747 based on Foata normal form. 6/5976 useless extension candidates. Maximal degree in co-relation 56189. Up to 5735 conditions per place. [2024-06-20 16:03:35,184 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 433 selfloop transitions, 45 changer transitions 0/482 dead transitions. [2024-06-20 16:03:35,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 482 transitions, 6656 flow [2024-06-20 16:03:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-20 16:03:35,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-20 16:03:35,185 INFO L175 Difference]: Start difference. First operand has 364 places, 465 transitions, 5369 flow. Second operand 9 states and 143 transitions. [2024-06-20 16:03:35,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 482 transitions, 6656 flow [2024-06-20 16:03:40,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 482 transitions, 6506 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:40,260 INFO L231 Difference]: Finished difference. Result has 368 places, 469 transitions, 5397 flow [2024-06-20 16:03:40,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5219, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5397, PETRI_PLACES=368, PETRI_TRANSITIONS=469} [2024-06-20 16:03:40,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-20 16:03:40,260 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 469 transitions, 5397 flow [2024-06-20 16:03:40,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:40,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:40,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:40,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:03:40,261 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)] === [2024-06-20 16:03:40,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:40,262 INFO L85 PathProgramCache]: Analyzing trace with hash 858251201, now seen corresponding path program 9 times [2024-06-20 16:03:40,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:40,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162473513] [2024-06-20 16:03:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:40,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:40,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:40,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162473513] [2024-06-20 16:03:40,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162473513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:40,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:40,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:40,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989016532] [2024-06-20 16:03:40,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:40,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:40,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:40,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:40,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:41,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:03:41,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 469 transitions, 5397 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:41,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:41,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:03:41,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:42,684 INFO L124 PetriNetUnfolderBase]: 3763/5993 cut-off events. [2024-06-20 16:03:42,684 INFO L125 PetriNetUnfolderBase]: For 1142320/1142326 co-relation queries the response was YES. [2024-06-20 16:03:42,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56645 conditions, 5993 events. 3763/5993 cut-off events. For 1142320/1142326 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36642 event pairs, 747 based on Foata normal form. 6/5992 useless extension candidates. Maximal degree in co-relation 56477. Up to 5769 conditions per place. [2024-06-20 16:03:42,763 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 446 selfloop transitions, 34 changer transitions 0/484 dead transitions. [2024-06-20 16:03:42,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 484 transitions, 6470 flow [2024-06-20 16:03:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:03:42,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-20 16:03:42,765 INFO L175 Difference]: Start difference. First operand has 368 places, 469 transitions, 5397 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:03:42,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 484 transitions, 6470 flow [2024-06-20 16:03:47,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 484 transitions, 6345 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 16:03:47,419 INFO L231 Difference]: Finished difference. Result has 371 places, 473 transitions, 5431 flow [2024-06-20 16:03:47,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5284, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5431, PETRI_PLACES=371, PETRI_TRANSITIONS=473} [2024-06-20 16:03:47,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-20 16:03:47,419 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 473 transitions, 5431 flow [2024-06-20 16:03:47,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:47,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:47,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:47,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:03:47,420 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)] === [2024-06-20 16:03:47,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1109690653, now seen corresponding path program 12 times [2024-06-20 16:03:47,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:47,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478377056] [2024-06-20 16:03:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:47,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:48,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:48,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478377056] [2024-06-20 16:03:48,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478377056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:48,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:48,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:48,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227345869] [2024-06-20 16:03:48,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:48,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:48,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:48,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:48,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:03:48,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 473 transitions, 5431 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:48,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:48,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:03:48,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:49,652 INFO L124 PetriNetUnfolderBase]: 3757/5994 cut-off events. [2024-06-20 16:03:49,652 INFO L125 PetriNetUnfolderBase]: For 1147885/1147891 co-relation queries the response was YES. [2024-06-20 16:03:49,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56396 conditions, 5994 events. 3757/5994 cut-off events. For 1147885/1147891 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36741 event pairs, 740 based on Foata normal form. 6/5994 useless extension candidates. Maximal degree in co-relation 56228. Up to 5713 conditions per place. [2024-06-20 16:03:49,742 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 50 changer transitions 0/486 dead transitions. [2024-06-20 16:03:49,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 486 transitions, 6449 flow [2024-06-20 16:03:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:03:49,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:03:49,743 INFO L175 Difference]: Start difference. First operand has 371 places, 473 transitions, 5431 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:03:49,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 486 transitions, 6449 flow [2024-06-20 16:03:53,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 486 transitions, 6283 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-20 16:03:53,970 INFO L231 Difference]: Finished difference. Result has 374 places, 473 transitions, 5371 flow [2024-06-20 16:03:53,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5371, PETRI_PLACES=374, PETRI_TRANSITIONS=473} [2024-06-20 16:03:53,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 16:03:53,971 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 473 transitions, 5371 flow [2024-06-20 16:03:53,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:53,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:53,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:53,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:03:53,972 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)] === [2024-06-20 16:03:53,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1035145571, now seen corresponding path program 10 times [2024-06-20 16:03:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:53,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741463190] [2024-06-20 16:03:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:53,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:54,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741463190] [2024-06-20 16:03:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741463190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:54,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:54,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:54,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853349206] [2024-06-20 16:03:54,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:54,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:54,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:54,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:03:54,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 473 transitions, 5371 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:54,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:54,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:03:54,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:56,322 INFO L124 PetriNetUnfolderBase]: 3767/6012 cut-off events. [2024-06-20 16:03:56,322 INFO L125 PetriNetUnfolderBase]: For 1159860/1159866 co-relation queries the response was YES. [2024-06-20 16:03:56,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56199 conditions, 6012 events. 3767/6012 cut-off events. For 1159860/1159866 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36944 event pairs, 738 based on Foata normal form. 6/6012 useless extension candidates. Maximal degree in co-relation 56030. Up to 5684 conditions per place. [2024-06-20 16:03:56,411 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 419 selfloop transitions, 68 changer transitions 0/491 dead transitions. [2024-06-20 16:03:56,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 491 transitions, 6922 flow [2024-06-20 16:03:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:03:56,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:03:56,412 INFO L175 Difference]: Start difference. First operand has 374 places, 473 transitions, 5371 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:03:56,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 491 transitions, 6922 flow [2024-06-20 16:04:00,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 491 transitions, 6765 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:04:00,745 INFO L231 Difference]: Finished difference. Result has 374 places, 476 transitions, 5415 flow [2024-06-20 16:04:00,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5214, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5415, PETRI_PLACES=374, PETRI_TRANSITIONS=476} [2024-06-20 16:04:00,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 16:04:00,746 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 476 transitions, 5415 flow [2024-06-20 16:04:00,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:00,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:00,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:00,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:04:00,746 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)] === [2024-06-20 16:04:00,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1257748511, now seen corresponding path program 11 times [2024-06-20 16:04:00,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:00,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682151960] [2024-06-20 16:04:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:00,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:01,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682151960] [2024-06-20 16:04:01,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682151960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:01,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:01,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734293072] [2024-06-20 16:04:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:01,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:01,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:01,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:01,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:01,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 476 transitions, 5415 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:01,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:01,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:01,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:03,107 INFO L124 PetriNetUnfolderBase]: 3761/5990 cut-off events. [2024-06-20 16:04:03,107 INFO L125 PetriNetUnfolderBase]: For 1164847/1164853 co-relation queries the response was YES. [2024-06-20 16:04:03,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56082 conditions, 5990 events. 3761/5990 cut-off events. For 1164847/1164853 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 36591 event pairs, 743 based on Foata normal form. 6/5990 useless extension candidates. Maximal degree in co-relation 55912. Up to 5767 conditions per place. [2024-06-20 16:04:03,185 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 445 selfloop transitions, 38 changer transitions 0/487 dead transitions. [2024-06-20 16:04:03,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 487 transitions, 6415 flow [2024-06-20 16:04:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:04:03,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-20 16:04:03,186 INFO L175 Difference]: Start difference. First operand has 374 places, 476 transitions, 5415 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:04:03,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 487 transitions, 6415 flow [2024-06-20 16:04:07,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 487 transitions, 6159 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:07,273 INFO L231 Difference]: Finished difference. Result has 377 places, 476 transitions, 5241 flow [2024-06-20 16:04:07,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5241, PETRI_PLACES=377, PETRI_TRANSITIONS=476} [2024-06-20 16:04:07,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 16:04:07,274 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 476 transitions, 5241 flow [2024-06-20 16:04:07,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:07,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:07,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:07,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:04:07,274 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)] === [2024-06-20 16:04:07,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1109274757, now seen corresponding path program 12 times [2024-06-20 16:04:07,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:07,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673150563] [2024-06-20 16:04:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:07,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:08,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673150563] [2024-06-20 16:04:08,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673150563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:08,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:08,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:08,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367264232] [2024-06-20 16:04:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:08,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:08,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:08,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:08,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 476 transitions, 5241 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:08,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:08,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:08,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:09,437 INFO L124 PetriNetUnfolderBase]: 3755/5992 cut-off events. [2024-06-20 16:04:09,437 INFO L125 PetriNetUnfolderBase]: For 1168412/1168418 co-relation queries the response was YES. [2024-06-20 16:04:09,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55745 conditions, 5992 events. 3755/5992 cut-off events. For 1168412/1168418 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 36793 event pairs, 730 based on Foata normal form. 6/5992 useless extension candidates. Maximal degree in co-relation 55574. Up to 5674 conditions per place. [2024-06-20 16:04:09,524 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 415 selfloop transitions, 70 changer transitions 0/489 dead transitions. [2024-06-20 16:04:09,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 489 transitions, 6265 flow [2024-06-20 16:04:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:04:09,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 16:04:09,525 INFO L175 Difference]: Start difference. First operand has 377 places, 476 transitions, 5241 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:04:09,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 489 transitions, 6265 flow [2024-06-20 16:04:14,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 489 transitions, 6130 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 16:04:14,025 INFO L231 Difference]: Finished difference. Result has 376 places, 476 transitions, 5252 flow [2024-06-20 16:04:14,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5252, PETRI_PLACES=376, PETRI_TRANSITIONS=476} [2024-06-20 16:04:14,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-20 16:04:14,026 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 476 transitions, 5252 flow [2024-06-20 16:04:14,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:14,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:14,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:14,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:04:14,027 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)] === [2024-06-20 16:04:14,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2029886785, now seen corresponding path program 4 times [2024-06-20 16:04:14,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:14,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373231187] [2024-06-20 16:04:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:14,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373231187] [2024-06-20 16:04:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373231187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:14,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744116430] [2024-06-20 16:04:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:14,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:15,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:15,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 476 transitions, 5252 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:15,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:15,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:15,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:16,541 INFO L124 PetriNetUnfolderBase]: 3750/5976 cut-off events. [2024-06-20 16:04:16,541 INFO L125 PetriNetUnfolderBase]: For 1173154/1173154 co-relation queries the response was YES. [2024-06-20 16:04:16,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55671 conditions, 5976 events. 3750/5976 cut-off events. For 1173154/1173154 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36577 event pairs, 753 based on Foata normal form. 2/5969 useless extension candidates. Maximal degree in co-relation 55499. Up to 5725 conditions per place. [2024-06-20 16:04:16,630 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 443 selfloop transitions, 40 changer transitions 0/487 dead transitions. [2024-06-20 16:04:16,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 487 transitions, 6244 flow [2024-06-20 16:04:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:04:16,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:04:16,631 INFO L175 Difference]: Start difference. First operand has 376 places, 476 transitions, 5252 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:04:16,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 487 transitions, 6244 flow [2024-06-20 16:04:21,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 487 transitions, 6055 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:21,385 INFO L231 Difference]: Finished difference. Result has 377 places, 476 transitions, 5148 flow [2024-06-20 16:04:21,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5148, PETRI_PLACES=377, PETRI_TRANSITIONS=476} [2024-06-20 16:04:21,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 16:04:21,386 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 476 transitions, 5148 flow [2024-06-20 16:04:21,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:21,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:21,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:21,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:04:21,386 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)] === [2024-06-20 16:04:21,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1669003403, now seen corresponding path program 5 times [2024-06-20 16:04:21,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:21,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071362660] [2024-06-20 16:04:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:21,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:22,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:22,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071362660] [2024-06-20 16:04:22,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071362660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:22,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:22,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:22,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726723161] [2024-06-20 16:04:22,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:22,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:22,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:22,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:22,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:22,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:22,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 476 transitions, 5148 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:22,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:22,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:22,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:23,973 INFO L124 PetriNetUnfolderBase]: 3817/6076 cut-off events. [2024-06-20 16:04:23,973 INFO L125 PetriNetUnfolderBase]: For 1184958/1184960 co-relation queries the response was YES. [2024-06-20 16:04:24,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56324 conditions, 6076 events. 3817/6076 cut-off events. For 1184958/1184960 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37167 event pairs, 739 based on Foata normal form. 3/6076 useless extension candidates. Maximal degree in co-relation 56152. Up to 5788 conditions per place. [2024-06-20 16:04:24,061 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 457 selfloop transitions, 72 changer transitions 0/533 dead transitions. [2024-06-20 16:04:24,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 533 transitions, 6652 flow [2024-06-20 16:04:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:04:24,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:04:24,062 INFO L175 Difference]: Start difference. First operand has 377 places, 476 transitions, 5148 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:04:24,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 533 transitions, 6652 flow [2024-06-20 16:04:29,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 533 transitions, 6523 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:29,622 INFO L231 Difference]: Finished difference. Result has 381 places, 505 transitions, 5621 flow [2024-06-20 16:04:29,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5621, PETRI_PLACES=381, PETRI_TRANSITIONS=505} [2024-06-20 16:04:29,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-20 16:04:29,623 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 505 transitions, 5621 flow [2024-06-20 16:04:29,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:29,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:29,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:29,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:04:29,623 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)] === [2024-06-20 16:04:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1225190279, now seen corresponding path program 6 times [2024-06-20 16:04:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211521309] [2024-06-20 16:04:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:30,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211521309] [2024-06-20 16:04:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211521309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:30,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:30,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978522646] [2024-06-20 16:04:30,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:30,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:30,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:30,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:30,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 505 transitions, 5621 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:30,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:30,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:30,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:32,204 INFO L124 PetriNetUnfolderBase]: 3894/6193 cut-off events. [2024-06-20 16:04:32,204 INFO L125 PetriNetUnfolderBase]: For 1201167/1201169 co-relation queries the response was YES. [2024-06-20 16:04:32,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58013 conditions, 6193 events. 3894/6193 cut-off events. For 1201167/1201169 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37910 event pairs, 751 based on Foata normal form. 3/6193 useless extension candidates. Maximal degree in co-relation 57838. Up to 5896 conditions per place. [2024-06-20 16:04:32,293 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 489 selfloop transitions, 83 changer transitions 0/576 dead transitions. [2024-06-20 16:04:32,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 576 transitions, 7548 flow [2024-06-20 16:04:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:04:32,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:04:32,294 INFO L175 Difference]: Start difference. First operand has 381 places, 505 transitions, 5621 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:04:32,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 576 transitions, 7548 flow [2024-06-20 16:04:39,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 576 transitions, 7247 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:39,475 INFO L231 Difference]: Finished difference. Result has 388 places, 548 transitions, 6332 flow [2024-06-20 16:04:39,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5441, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6332, PETRI_PLACES=388, PETRI_TRANSITIONS=548} [2024-06-20 16:04:39,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-20 16:04:39,476 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 548 transitions, 6332 flow [2024-06-20 16:04:39,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:39,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:39,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:39,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:04:39,476 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)] === [2024-06-20 16:04:39,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash 485355461, now seen corresponding path program 13 times [2024-06-20 16:04:39,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:39,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701911627] [2024-06-20 16:04:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:39,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:40,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:40,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701911627] [2024-06-20 16:04:40,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701911627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:40,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:40,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:40,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284750062] [2024-06-20 16:04:40,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:40,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:40,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:40,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:40,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:40,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:40,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 548 transitions, 6332 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:40,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:40,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:40,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:41,964 INFO L124 PetriNetUnfolderBase]: 3973/6321 cut-off events. [2024-06-20 16:04:41,964 INFO L125 PetriNetUnfolderBase]: For 1215865/1215867 co-relation queries the response was YES. [2024-06-20 16:04:42,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59332 conditions, 6321 events. 3973/6321 cut-off events. For 1215865/1215867 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38871 event pairs, 759 based on Foata normal form. 4/6322 useless extension candidates. Maximal degree in co-relation 59154. Up to 5934 conditions per place. [2024-06-20 16:04:42,054 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 521 selfloop transitions, 79 changer transitions 0/604 dead transitions. [2024-06-20 16:04:42,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 604 transitions, 8009 flow [2024-06-20 16:04:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:04:42,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:04:42,056 INFO L175 Difference]: Start difference. First operand has 388 places, 548 transitions, 6332 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:04:42,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 604 transitions, 8009 flow [2024-06-20 16:04:46,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 604 transitions, 7769 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-20 16:04:46,721 INFO L231 Difference]: Finished difference. Result has 395 places, 573 transitions, 6691 flow [2024-06-20 16:04:46,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6691, PETRI_PLACES=395, PETRI_TRANSITIONS=573} [2024-06-20 16:04:46,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 16:04:46,722 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 573 transitions, 6691 flow [2024-06-20 16:04:46,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:46,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:46,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:46,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:04:46,722 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)] === [2024-06-20 16:04:46,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1802422843, now seen corresponding path program 1 times [2024-06-20 16:04:46,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:46,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413795801] [2024-06-20 16:04:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:46,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:47,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:47,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413795801] [2024-06-20 16:04:47,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413795801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:47,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:47,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110249888] [2024-06-20 16:04:47,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:47,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:47,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:47,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 573 transitions, 6691 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:47,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:47,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:47,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:49,592 INFO L124 PetriNetUnfolderBase]: 3846/6193 cut-off events. [2024-06-20 16:04:49,592 INFO L125 PetriNetUnfolderBase]: For 1071054/1071064 co-relation queries the response was YES. [2024-06-20 16:04:49,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56531 conditions, 6193 events. 3846/6193 cut-off events. For 1071054/1071064 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 38840 event pairs, 742 based on Foata normal form. 2/6182 useless extension candidates. Maximal degree in co-relation 56351. Up to 5813 conditions per place. [2024-06-20 16:04:49,679 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 551 selfloop transitions, 26 changer transitions 0/604 dead transitions. [2024-06-20 16:04:49,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 604 transitions, 8323 flow [2024-06-20 16:04:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:04:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:04:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:04:49,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:04:49,681 INFO L175 Difference]: Start difference. First operand has 395 places, 573 transitions, 6691 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:04:49,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 604 transitions, 8323 flow [2024-06-20 16:04:55,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 604 transitions, 8047 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:04:55,943 INFO L231 Difference]: Finished difference. Result has 397 places, 577 transitions, 6624 flow [2024-06-20 16:04:55,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6415, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6624, PETRI_PLACES=397, PETRI_TRANSITIONS=577} [2024-06-20 16:04:55,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-20 16:04:55,943 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 577 transitions, 6624 flow [2024-06-20 16:04:55,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:55,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:55,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:55,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:04:55,944 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)] === [2024-06-20 16:04:55,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1802362269, now seen corresponding path program 1 times [2024-06-20 16:04:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:55,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521109567] [2024-06-20 16:04:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:57,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521109567] [2024-06-20 16:04:57,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521109567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:57,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:57,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:57,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904613962] [2024-06-20 16:04:57,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:57,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:57,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:57,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:57,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:57,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 577 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:57,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:57,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:57,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:58,903 INFO L124 PetriNetUnfolderBase]: 3864/6220 cut-off events. [2024-06-20 16:04:58,903 INFO L125 PetriNetUnfolderBase]: For 1096177/1096187 co-relation queries the response was YES. [2024-06-20 16:04:58,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56992 conditions, 6220 events. 3864/6220 cut-off events. For 1096177/1096187 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 39053 event pairs, 777 based on Foata normal form. 2/6209 useless extension candidates. Maximal degree in co-relation 56811. Up to 5859 conditions per place. [2024-06-20 16:04:58,989 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 550 selfloop transitions, 27 changer transitions 0/604 dead transitions. [2024-06-20 16:04:58,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 604 transitions, 7926 flow [2024-06-20 16:04:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-20 16:04:58,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41019955654101997 [2024-06-20 16:04:58,991 INFO L175 Difference]: Start difference. First operand has 397 places, 577 transitions, 6624 flow. Second operand 11 states and 185 transitions. [2024-06-20 16:04:58,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 604 transitions, 7926 flow [2024-06-20 16:05:04,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 604 transitions, 7808 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:04,119 INFO L231 Difference]: Finished difference. Result has 402 places, 580 transitions, 6643 flow [2024-06-20 16:05:04,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6643, PETRI_PLACES=402, PETRI_TRANSITIONS=580} [2024-06-20 16:05:04,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-20 16:05:04,119 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 580 transitions, 6643 flow [2024-06-20 16:05:04,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:04,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:04,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:05:04,120 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)] === [2024-06-20 16:05:04,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1802362393, now seen corresponding path program 2 times [2024-06-20 16:05:04,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:04,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852001785] [2024-06-20 16:05:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:04,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:05,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852001785] [2024-06-20 16:05:05,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852001785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:05,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:05,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:05,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972392604] [2024-06-20 16:05:05,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:05,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:05,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:05,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 580 transitions, 6643 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:05,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:05,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:05,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:06,980 INFO L124 PetriNetUnfolderBase]: 3877/6239 cut-off events. [2024-06-20 16:05:06,980 INFO L125 PetriNetUnfolderBase]: For 1114640/1114650 co-relation queries the response was YES. [2024-06-20 16:05:07,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57579 conditions, 6239 events. 3877/6239 cut-off events. For 1114640/1114650 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39117 event pairs, 777 based on Foata normal form. 2/6228 useless extension candidates. Maximal degree in co-relation 57396. Up to 5887 conditions per place. [2024-06-20 16:05:07,071 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 554 selfloop transitions, 26 changer transitions 0/607 dead transitions. [2024-06-20 16:05:07,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 607 transitions, 7951 flow [2024-06-20 16:05:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:05:07,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:05:07,072 INFO L175 Difference]: Start difference. First operand has 402 places, 580 transitions, 6643 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:05:07,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 607 transitions, 7951 flow [2024-06-20 16:05:13,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 607 transitions, 7833 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-20 16:05:13,088 INFO L231 Difference]: Finished difference. Result has 403 places, 585 transitions, 6664 flow [2024-06-20 16:05:13,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6530, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6664, PETRI_PLACES=403, PETRI_TRANSITIONS=585} [2024-06-20 16:05:13,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-20 16:05:13,089 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 585 transitions, 6664 flow [2024-06-20 16:05:13,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:13,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:13,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:13,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:05:13,089 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)] === [2024-06-20 16:05:13,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1390374879, now seen corresponding path program 3 times [2024-06-20 16:05:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:13,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727173530] [2024-06-20 16:05:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:13,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:14,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:14,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727173530] [2024-06-20 16:05:14,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727173530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:14,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:14,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:14,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942734558] [2024-06-20 16:05:14,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:14,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:14,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:14,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 585 transitions, 6664 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:14,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:14,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:14,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:15,916 INFO L124 PetriNetUnfolderBase]: 3872/6232 cut-off events. [2024-06-20 16:05:15,916 INFO L125 PetriNetUnfolderBase]: For 1115061/1115071 co-relation queries the response was YES. [2024-06-20 16:05:15,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57290 conditions, 6232 events. 3872/6232 cut-off events. For 1115061/1115071 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39095 event pairs, 776 based on Foata normal form. 2/6221 useless extension candidates. Maximal degree in co-relation 57106. Up to 5892 conditions per place. [2024-06-20 16:05:16,009 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 556 selfloop transitions, 20 changer transitions 0/603 dead transitions. [2024-06-20 16:05:16,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 603 transitions, 7872 flow [2024-06-20 16:05:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:05:16,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:05:16,011 INFO L175 Difference]: Start difference. First operand has 403 places, 585 transitions, 6664 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:05:16,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 603 transitions, 7872 flow [2024-06-20 16:05:22,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 603 transitions, 7741 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:22,114 INFO L231 Difference]: Finished difference. Result has 406 places, 585 transitions, 6578 flow [2024-06-20 16:05:22,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6533, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6578, PETRI_PLACES=406, PETRI_TRANSITIONS=585} [2024-06-20 16:05:22,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-20 16:05:22,114 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 585 transitions, 6578 flow [2024-06-20 16:05:22,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:22,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:22,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:22,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:05:22,115 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)] === [2024-06-20 16:05:22,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1274905955, now seen corresponding path program 2 times [2024-06-20 16:05:22,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:22,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297215917] [2024-06-20 16:05:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:22,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:23,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:23,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297215917] [2024-06-20 16:05:23,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297215917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:23,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:23,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:23,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720314519] [2024-06-20 16:05:23,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:23,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:23,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:23,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:23,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 585 transitions, 6578 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:23,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:23,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:23,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:24,813 INFO L124 PetriNetUnfolderBase]: 3877/6238 cut-off events. [2024-06-20 16:05:24,813 INFO L125 PetriNetUnfolderBase]: For 1134993/1135003 co-relation queries the response was YES. [2024-06-20 16:05:24,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57183 conditions, 6238 events. 3877/6238 cut-off events. For 1134993/1135003 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 39147 event pairs, 775 based on Foata normal form. 3/6228 useless extension candidates. Maximal degree in co-relation 56998. Up to 5797 conditions per place. [2024-06-20 16:05:24,907 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 519 selfloop transitions, 65 changer transitions 0/611 dead transitions. [2024-06-20 16:05:24,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 611 transitions, 8252 flow [2024-06-20 16:05:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:05:24,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:05:24,908 INFO L175 Difference]: Start difference. First operand has 406 places, 585 transitions, 6578 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:05:24,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 611 transitions, 8252 flow [2024-06-20 16:05:31,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 611 transitions, 8188 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:05:31,148 INFO L231 Difference]: Finished difference. Result has 407 places, 591 transitions, 6851 flow [2024-06-20 16:05:31,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6514, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6851, PETRI_PLACES=407, PETRI_TRANSITIONS=591} [2024-06-20 16:05:31,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-20 16:05:31,149 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 591 transitions, 6851 flow [2024-06-20 16:05:31,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:31,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:31,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:05:31,150 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)] === [2024-06-20 16:05:31,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1275078935, now seen corresponding path program 3 times [2024-06-20 16:05:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:31,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535940037] [2024-06-20 16:05:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:31,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:32,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:32,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535940037] [2024-06-20 16:05:32,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535940037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:32,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:32,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:32,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501679808] [2024-06-20 16:05:32,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:32,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:32,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:32,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:32,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:32,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 591 transitions, 6851 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:32,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:32,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:32,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:34,071 INFO L124 PetriNetUnfolderBase]: 3885/6250 cut-off events. [2024-06-20 16:05:34,071 INFO L125 PetriNetUnfolderBase]: For 1149100/1149110 co-relation queries the response was YES. [2024-06-20 16:05:34,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58098 conditions, 6250 events. 3885/6250 cut-off events. For 1149100/1149110 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 39269 event pairs, 776 based on Foata normal form. 2/6239 useless extension candidates. Maximal degree in co-relation 57911. Up to 5821 conditions per place. [2024-06-20 16:05:34,161 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 527 selfloop transitions, 59 changer transitions 0/613 dead transitions. [2024-06-20 16:05:34,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 613 transitions, 8167 flow [2024-06-20 16:05:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:05:34,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:05:34,163 INFO L175 Difference]: Start difference. First operand has 407 places, 591 transitions, 6851 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:05:34,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 613 transitions, 8167 flow [2024-06-20 16:05:39,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 613 transitions, 8051 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:39,911 INFO L231 Difference]: Finished difference. Result has 411 places, 594 transitions, 6947 flow [2024-06-20 16:05:39,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6947, PETRI_PLACES=411, PETRI_TRANSITIONS=594} [2024-06-20 16:05:39,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-20 16:05:39,912 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 594 transitions, 6947 flow [2024-06-20 16:05:39,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:39,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:39,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:39,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:05:39,913 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)] === [2024-06-20 16:05:39,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1275083585, now seen corresponding path program 4 times [2024-06-20 16:05:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:39,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156258389] [2024-06-20 16:05:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:41,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:41,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156258389] [2024-06-20 16:05:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156258389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:41,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:41,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:41,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983519785] [2024-06-20 16:05:41,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:41,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:41,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:41,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:41,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 594 transitions, 6947 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:41,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:41,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:41,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:42,821 INFO L124 PetriNetUnfolderBase]: 3889/6260 cut-off events. [2024-06-20 16:05:42,821 INFO L125 PetriNetUnfolderBase]: For 1166970/1166980 co-relation queries the response was YES. [2024-06-20 16:05:42,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58816 conditions, 6260 events. 3889/6260 cut-off events. For 1166970/1166980 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39338 event pairs, 774 based on Foata normal form. 2/6249 useless extension candidates. Maximal degree in co-relation 58627. Up to 5814 conditions per place. [2024-06-20 16:05:42,913 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 523 selfloop transitions, 68 changer transitions 0/618 dead transitions. [2024-06-20 16:05:42,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 618 transitions, 8285 flow [2024-06-20 16:05:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-20 16:05:42,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-20 16:05:42,915 INFO L175 Difference]: Start difference. First operand has 411 places, 594 transitions, 6947 flow. Second operand 10 states and 178 transitions. [2024-06-20 16:05:42,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 618 transitions, 8285 flow [2024-06-20 16:05:49,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 618 transitions, 8095 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:49,016 INFO L231 Difference]: Finished difference. Result has 414 places, 597 transitions, 6997 flow [2024-06-20 16:05:49,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6757, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6997, PETRI_PLACES=414, PETRI_TRANSITIONS=597} [2024-06-20 16:05:49,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-20 16:05:49,016 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 597 transitions, 6997 flow [2024-06-20 16:05:49,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:49,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:49,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:49,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:05:49,017 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)] === [2024-06-20 16:05:49,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1684274713, now seen corresponding path program 4 times [2024-06-20 16:05:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:49,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784590940] [2024-06-20 16:05:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:49,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:50,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784590940] [2024-06-20 16:05:50,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784590940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:50,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:50,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:50,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068597323] [2024-06-20 16:05:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:50,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:50,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:50,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:50,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:50,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 597 transitions, 6997 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:50,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:50,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:50,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:51,996 INFO L124 PetriNetUnfolderBase]: 3903/6280 cut-off events. [2024-06-20 16:05:51,997 INFO L125 PetriNetUnfolderBase]: For 1185596/1185606 co-relation queries the response was YES. [2024-06-20 16:05:52,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59485 conditions, 6280 events. 3903/6280 cut-off events. For 1185596/1185606 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 39508 event pairs, 777 based on Foata normal form. 2/6269 useless extension candidates. Maximal degree in co-relation 59295. Up to 5919 conditions per place. [2024-06-20 16:05:52,097 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 554 selfloop transitions, 33 changer transitions 0/614 dead transitions. [2024-06-20 16:05:52,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 614 transitions, 8301 flow [2024-06-20 16:05:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 16:05:52,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:05:52,098 INFO L175 Difference]: Start difference. First operand has 414 places, 597 transitions, 6997 flow. Second operand 10 states and 164 transitions. [2024-06-20 16:05:52,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 614 transitions, 8301 flow [2024-06-20 16:05:58,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 614 transitions, 8087 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:58,978 INFO L231 Difference]: Finished difference. Result has 416 places, 599 transitions, 6944 flow [2024-06-20 16:05:58,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6785, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6944, PETRI_PLACES=416, PETRI_TRANSITIONS=599} [2024-06-20 16:05:58,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-20 16:05:58,979 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 599 transitions, 6944 flow [2024-06-20 16:05:58,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:58,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:58,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:58,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:05:58,980 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)] === [2024-06-20 16:05:58,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:58,980 INFO L85 PathProgramCache]: Analyzing trace with hash 13034351, now seen corresponding path program 5 times [2024-06-20 16:05:58,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:58,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955712593] [2024-06-20 16:05:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:00,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:00,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955712593] [2024-06-20 16:06:00,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955712593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:00,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:00,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:00,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039811463] [2024-06-20 16:06:00,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:00,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:00,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:00,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:00,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:00,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 599 transitions, 6944 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:00,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:00,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:00,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:01,872 INFO L124 PetriNetUnfolderBase]: 3940/6329 cut-off events. [2024-06-20 16:06:01,872 INFO L125 PetriNetUnfolderBase]: For 1199914/1199924 co-relation queries the response was YES. [2024-06-20 16:06:01,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59756 conditions, 6329 events. 3940/6329 cut-off events. For 1199914/1199924 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39795 event pairs, 778 based on Foata normal form. 2/6318 useless extension candidates. Maximal degree in co-relation 59565. Up to 5926 conditions per place. [2024-06-20 16:06:01,969 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 550 selfloop transitions, 46 changer transitions 0/623 dead transitions. [2024-06-20 16:06:01,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 623 transitions, 8628 flow [2024-06-20 16:06:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:06:01,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:06:01,971 INFO L175 Difference]: Start difference. First operand has 416 places, 599 transitions, 6944 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:06:01,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 623 transitions, 8628 flow [2024-06-20 16:06:08,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 623 transitions, 8485 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:08,726 INFO L231 Difference]: Finished difference. Result has 418 places, 605 transitions, 7086 flow [2024-06-20 16:06:08,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7086, PETRI_PLACES=418, PETRI_TRANSITIONS=605} [2024-06-20 16:06:08,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-20 16:06:08,727 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 605 transitions, 7086 flow [2024-06-20 16:06:08,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:08,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:08,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:06:08,727 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)] === [2024-06-20 16:06:08,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1035391463, now seen corresponding path program 5 times [2024-06-20 16:06:08,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:08,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890835543] [2024-06-20 16:06:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:09,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:09,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890835543] [2024-06-20 16:06:09,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890835543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:09,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:09,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:09,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760544286] [2024-06-20 16:06:09,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:09,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:09,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:09,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:10,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:10,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 605 transitions, 7086 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:10,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:10,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:10,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:11,631 INFO L124 PetriNetUnfolderBase]: 3935/6322 cut-off events. [2024-06-20 16:06:11,631 INFO L125 PetriNetUnfolderBase]: For 1202780/1202790 co-relation queries the response was YES. [2024-06-20 16:06:11,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59838 conditions, 6322 events. 3935/6322 cut-off events. For 1202780/1202790 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39703 event pairs, 782 based on Foata normal form. 2/6311 useless extension candidates. Maximal degree in co-relation 59646. Up to 5990 conditions per place. [2024-06-20 16:06:11,729 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 571 selfloop transitions, 21 changer transitions 0/619 dead transitions. [2024-06-20 16:06:11,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 619 transitions, 8392 flow [2024-06-20 16:06:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-20 16:06:11,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3829268292682927 [2024-06-20 16:06:11,730 INFO L175 Difference]: Start difference. First operand has 418 places, 605 transitions, 7086 flow. Second operand 10 states and 157 transitions. [2024-06-20 16:06:11,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 619 transitions, 8392 flow [2024-06-20 16:06:18,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 619 transitions, 8236 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:18,764 INFO L231 Difference]: Finished difference. Result has 422 places, 607 transitions, 7071 flow [2024-06-20 16:06:18,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7071, PETRI_PLACES=422, PETRI_TRANSITIONS=607} [2024-06-20 16:06:18,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-20 16:06:18,765 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 607 transitions, 7071 flow [2024-06-20 16:06:18,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:18,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:18,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:18,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:06:18,765 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)] === [2024-06-20 16:06:18,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1035569217, now seen corresponding path program 6 times [2024-06-20 16:06:18,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:18,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737914637] [2024-06-20 16:06:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:19,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737914637] [2024-06-20 16:06:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737914637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:19,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:19,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:19,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123689127] [2024-06-20 16:06:19,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:19,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:19,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:20,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:20,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 607 transitions, 7071 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:20,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:20,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:20,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:21,655 INFO L124 PetriNetUnfolderBase]: 3942/6333 cut-off events. [2024-06-20 16:06:21,655 INFO L125 PetriNetUnfolderBase]: For 1217660/1217670 co-relation queries the response was YES. [2024-06-20 16:06:21,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60006 conditions, 6333 events. 3942/6333 cut-off events. For 1217660/1217670 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 39819 event pairs, 780 based on Foata normal form. 2/6322 useless extension candidates. Maximal degree in co-relation 59812. Up to 5957 conditions per place. [2024-06-20 16:06:21,762 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 560 selfloop transitions, 38 changer transitions 0/625 dead transitions. [2024-06-20 16:06:21,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 625 transitions, 8385 flow [2024-06-20 16:06:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:06:21,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 16:06:21,763 INFO L175 Difference]: Start difference. First operand has 422 places, 607 transitions, 7071 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:06:21,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 625 transitions, 8385 flow [2024-06-20 16:06:29,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 625 transitions, 8260 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:29,223 INFO L231 Difference]: Finished difference. Result has 423 places, 610 transitions, 7106 flow [2024-06-20 16:06:29,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7106, PETRI_PLACES=423, PETRI_TRANSITIONS=610} [2024-06-20 16:06:29,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-20 16:06:29,224 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 610 transitions, 7106 flow [2024-06-20 16:06:29,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:29,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:29,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:29,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:06:29,224 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)] === [2024-06-20 16:06:29,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:29,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1042071281, now seen corresponding path program 1 times [2024-06-20 16:06:29,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:29,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791923441] [2024-06-20 16:06:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:30,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:30,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791923441] [2024-06-20 16:06:30,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791923441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:30,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:30,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:30,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328546061] [2024-06-20 16:06:30,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:30,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:30,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:30,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:30,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 610 transitions, 7106 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) [2024-06-20 16:06:30,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:30,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:30,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:32,029 INFO L124 PetriNetUnfolderBase]: 4110/6511 cut-off events. [2024-06-20 16:06:32,029 INFO L125 PetriNetUnfolderBase]: For 1418182/1418182 co-relation queries the response was YES. [2024-06-20 16:06:32,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63929 conditions, 6511 events. 4110/6511 cut-off events. For 1418182/1418182 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40021 event pairs, 838 based on Foata normal form. 1/6509 useless extension candidates. Maximal degree in co-relation 63734. Up to 6295 conditions per place. [2024-06-20 16:06:32,132 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 600 selfloop transitions, 23 changer transitions 0/627 dead transitions. [2024-06-20 16:06:32,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 627 transitions, 8507 flow [2024-06-20 16:06:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:06:32,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 16:06:32,133 INFO L175 Difference]: Start difference. First operand has 423 places, 610 transitions, 7106 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:06:32,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 627 transitions, 8507 flow [2024-06-20 16:06:40,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 627 transitions, 8371 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:40,359 INFO L231 Difference]: Finished difference. Result has 424 places, 616 transitions, 7161 flow [2024-06-20 16:06:40,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6974, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7161, PETRI_PLACES=424, PETRI_TRANSITIONS=616} [2024-06-20 16:06:40,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-20 16:06:40,360 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 616 transitions, 7161 flow [2024-06-20 16:06:40,361 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) [2024-06-20 16:06:40,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:40,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:40,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:06:40,361 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:40,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1263470367, now seen corresponding path program 7 times [2024-06-20 16:06:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:40,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946023697] [2024-06-20 16:06:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:41,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946023697] [2024-06-20 16:06:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946023697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:41,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:41,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:41,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752562634] [2024-06-20 16:06:41,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:41,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:41,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:41,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:41,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:41,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:41,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 616 transitions, 7161 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:41,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:41,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:41,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:43,052 INFO L124 PetriNetUnfolderBase]: 3936/6325 cut-off events. [2024-06-20 16:06:43,052 INFO L125 PetriNetUnfolderBase]: For 1222832/1222842 co-relation queries the response was YES. [2024-06-20 16:06:43,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59318 conditions, 6325 events. 3936/6325 cut-off events. For 1222832/1222842 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 39760 event pairs, 777 based on Foata normal form. 4/6316 useless extension candidates. Maximal degree in co-relation 59122. Up to 5953 conditions per place. [2024-06-20 16:06:43,152 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 568 selfloop transitions, 39 changer transitions 0/634 dead transitions. [2024-06-20 16:06:43,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 634 transitions, 8783 flow [2024-06-20 16:06:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:06:43,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 16:06:43,153 INFO L175 Difference]: Start difference. First operand has 424 places, 616 transitions, 7161 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:06:43,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 634 transitions, 8783 flow [2024-06-20 16:06:50,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 634 transitions, 8619 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:50,711 INFO L231 Difference]: Finished difference. Result has 427 places, 619 transitions, 7189 flow [2024-06-20 16:06:50,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6997, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7189, PETRI_PLACES=427, PETRI_TRANSITIONS=619} [2024-06-20 16:06:50,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-20 16:06:50,712 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 619 transitions, 7189 flow [2024-06-20 16:06:50,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:50,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:50,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:06:50,712 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:50,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash -771500175, now seen corresponding path program 1 times [2024-06-20 16:06:50,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:50,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691487279] [2024-06-20 16:06:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:51,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691487279] [2024-06-20 16:06:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691487279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:51,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:51,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:51,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985902472] [2024-06-20 16:06:51,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:51,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:51,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:51,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:51,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 619 transitions, 7189 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) [2024-06-20 16:06:51,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:51,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:51,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:53,934 INFO L124 PetriNetUnfolderBase]: 4105/6505 cut-off events. [2024-06-20 16:06:53,934 INFO L125 PetriNetUnfolderBase]: For 1423836/1423838 co-relation queries the response was YES. [2024-06-20 16:06:54,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63838 conditions, 6505 events. 4105/6505 cut-off events. For 1423836/1423838 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39980 event pairs, 748 based on Foata normal form. 3/6505 useless extension candidates. Maximal degree in co-relation 63641. Up to 6175 conditions per place. [2024-06-20 16:06:54,040 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 593 selfloop transitions, 52 changer transitions 0/649 dead transitions. [2024-06-20 16:06:54,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 649 transitions, 8697 flow [2024-06-20 16:06:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:06:54,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:06:54,041 INFO L175 Difference]: Start difference. First operand has 427 places, 619 transitions, 7189 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:06:54,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 649 transitions, 8697 flow [2024-06-20 16:07:02,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 649 transitions, 8492 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:02,603 INFO L231 Difference]: Finished difference. Result has 429 places, 622 transitions, 7228 flow [2024-06-20 16:07:02,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6984, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7228, PETRI_PLACES=429, PETRI_TRANSITIONS=622} [2024-06-20 16:07:02,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-20 16:07:02,603 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 622 transitions, 7228 flow [2024-06-20 16:07:02,603 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) [2024-06-20 16:07:02,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:02,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:02,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:07:02,604 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:02,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash -601866881, now seen corresponding path program 1 times [2024-06-20 16:07:02,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:02,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680814455] [2024-06-20 16:07:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:02,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:03,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680814455] [2024-06-20 16:07:03,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680814455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:03,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:03,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663679586] [2024-06-20 16:07:03,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:03,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:03,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:03,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 622 transitions, 7228 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) [2024-06-20 16:07:03,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:03,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:03,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:05,536 INFO L124 PetriNetUnfolderBase]: 4110/6512 cut-off events. [2024-06-20 16:07:05,536 INFO L125 PetriNetUnfolderBase]: For 1450617/1450619 co-relation queries the response was YES. [2024-06-20 16:07:05,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64372 conditions, 6512 events. 4110/6512 cut-off events. For 1450617/1450619 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40059 event pairs, 751 based on Foata normal form. 3/6512 useless extension candidates. Maximal degree in co-relation 64174. Up to 6034 conditions per place. [2024-06-20 16:07:05,640 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 511 selfloop transitions, 138 changer transitions 0/653 dead transitions. [2024-06-20 16:07:05,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 653 transitions, 9052 flow [2024-06-20 16:07:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:07:05,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:07:05,641 INFO L175 Difference]: Start difference. First operand has 429 places, 622 transitions, 7228 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:07:05,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 653 transitions, 9052 flow [2024-06-20 16:07:10,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 653 transitions, 8830 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:10,590 INFO L231 Difference]: Finished difference. Result has 431 places, 628 transitions, 7475 flow [2024-06-20 16:07:10,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7475, PETRI_PLACES=431, PETRI_TRANSITIONS=628} [2024-06-20 16:07:10,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-20 16:07:10,591 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 628 transitions, 7475 flow [2024-06-20 16:07:10,591 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) [2024-06-20 16:07:10,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:10,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:10,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:07:10,591 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:10,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash -771380205, now seen corresponding path program 2 times [2024-06-20 16:07:10,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:10,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489667081] [2024-06-20 16:07:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:10,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:11,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:11,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489667081] [2024-06-20 16:07:11,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489667081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:11,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:11,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980853440] [2024-06-20 16:07:11,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:11,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:11,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:11,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:11,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:11,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:11,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 628 transitions, 7475 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) [2024-06-20 16:07:11,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:11,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:11,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:13,484 INFO L124 PetriNetUnfolderBase]: 4115/6515 cut-off events. [2024-06-20 16:07:13,484 INFO L125 PetriNetUnfolderBase]: For 1476162/1476164 co-relation queries the response was YES. [2024-06-20 16:07:13,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65099 conditions, 6515 events. 4115/6515 cut-off events. For 1476162/1476164 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39986 event pairs, 748 based on Foata normal form. 3/6515 useless extension candidates. Maximal degree in co-relation 64900. Up to 6061 conditions per place. [2024-06-20 16:07:13,596 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 523 selfloop transitions, 132 changer transitions 0/659 dead transitions. [2024-06-20 16:07:13,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 659 transitions, 9409 flow [2024-06-20 16:07:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:07:13,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:07:13,597 INFO L175 Difference]: Start difference. First operand has 431 places, 628 transitions, 7475 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:07:13,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 659 transitions, 9409 flow [2024-06-20 16:07:22,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 659 transitions, 9214 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-20 16:07:22,798 INFO L231 Difference]: Finished difference. Result has 436 places, 634 transitions, 7833 flow [2024-06-20 16:07:22,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7280, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7833, PETRI_PLACES=436, PETRI_TRANSITIONS=634} [2024-06-20 16:07:22,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-20 16:07:22,799 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 634 transitions, 7833 flow [2024-06-20 16:07:22,799 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) [2024-06-20 16:07:22,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:22,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:22,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:07:22,800 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:22,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash -594011349, now seen corresponding path program 2 times [2024-06-20 16:07:22,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:22,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554850574] [2024-06-20 16:07:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:22,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:23,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:23,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554850574] [2024-06-20 16:07:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554850574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60781150] [2024-06-20 16:07:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:23,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:23,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 634 transitions, 7833 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) [2024-06-20 16:07:23,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:23,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:23,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:25,593 INFO L124 PetriNetUnfolderBase]: 4125/6538 cut-off events. [2024-06-20 16:07:25,593 INFO L125 PetriNetUnfolderBase]: For 1506281/1506283 co-relation queries the response was YES. [2024-06-20 16:07:25,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65817 conditions, 6538 events. 4125/6538 cut-off events. For 1506281/1506283 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 40266 event pairs, 751 based on Foata normal form. 3/6538 useless extension candidates. Maximal degree in co-relation 65616. Up to 6182 conditions per place. [2024-06-20 16:07:25,708 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 568 selfloop transitions, 89 changer transitions 0/661 dead transitions. [2024-06-20 16:07:25,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 661 transitions, 9296 flow [2024-06-20 16:07:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:07:25,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:07:25,709 INFO L175 Difference]: Start difference. First operand has 436 places, 634 transitions, 7833 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:07:25,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 661 transitions, 9296 flow [2024-06-20 16:07:31,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 661 transitions, 9020 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:31,957 INFO L231 Difference]: Finished difference. Result has 440 places, 640 transitions, 7830 flow [2024-06-20 16:07:31,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7830, PETRI_PLACES=440, PETRI_TRANSITIONS=640} [2024-06-20 16:07:31,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-20 16:07:31,958 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 640 transitions, 7830 flow [2024-06-20 16:07:31,958 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) [2024-06-20 16:07:31,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:31,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:31,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:07:31,959 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:31,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash 47395273, now seen corresponding path program 3 times [2024-06-20 16:07:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:31,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259866549] [2024-06-20 16:07:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:31,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:33,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259866549] [2024-06-20 16:07:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259866549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:33,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777389911] [2024-06-20 16:07:33,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:33,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:33,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:33,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:33,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 640 transitions, 7830 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) [2024-06-20 16:07:33,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:33,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:33,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:35,057 INFO L124 PetriNetUnfolderBase]: 4130/6543 cut-off events. [2024-06-20 16:07:35,057 INFO L125 PetriNetUnfolderBase]: For 1524426/1524428 co-relation queries the response was YES. [2024-06-20 16:07:35,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66052 conditions, 6543 events. 4130/6543 cut-off events. For 1524426/1524428 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 40278 event pairs, 751 based on Foata normal form. 3/6543 useless extension candidates. Maximal degree in co-relation 65849. Up to 6158 conditions per place. [2024-06-20 16:07:35,169 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 104 changer transitions 0/664 dead transitions. [2024-06-20 16:07:35,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 664 transitions, 9280 flow [2024-06-20 16:07:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:07:35,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:07:35,170 INFO L175 Difference]: Start difference. First operand has 440 places, 640 transitions, 7830 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:07:35,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 664 transitions, 9280 flow [2024-06-20 16:07:42,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 664 transitions, 9055 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:42,676 INFO L231 Difference]: Finished difference. Result has 443 places, 643 transitions, 7894 flow [2024-06-20 16:07:42,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7605, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7894, PETRI_PLACES=443, PETRI_TRANSITIONS=643} [2024-06-20 16:07:42,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-20 16:07:42,676 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 643 transitions, 7894 flow [2024-06-20 16:07:42,676 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) [2024-06-20 16:07:42,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:42,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:42,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:07:42,677 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:42,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash -594248685, now seen corresponding path program 3 times [2024-06-20 16:07:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:42,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764419803] [2024-06-20 16:07:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:42,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:43,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:43,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764419803] [2024-06-20 16:07:43,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764419803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:43,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:43,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606725547] [2024-06-20 16:07:43,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:43,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:43,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:43,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:43,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:43,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 643 transitions, 7894 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) [2024-06-20 16:07:43,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:43,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:43,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:45,584 INFO L124 PetriNetUnfolderBase]: 4135/6546 cut-off events. [2024-06-20 16:07:45,584 INFO L125 PetriNetUnfolderBase]: For 1544900/1544902 co-relation queries the response was YES. [2024-06-20 16:07:45,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66323 conditions, 6546 events. 4135/6546 cut-off events. For 1544900/1544902 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40242 event pairs, 746 based on Foata normal form. 3/6546 useless extension candidates. Maximal degree in co-relation 66119. Up to 6214 conditions per place. [2024-06-20 16:07:45,702 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 571 selfloop transitions, 92 changer transitions 0/667 dead transitions. [2024-06-20 16:07:45,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 667 transitions, 9392 flow [2024-06-20 16:07:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:07:45,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:07:45,703 INFO L175 Difference]: Start difference. First operand has 443 places, 643 transitions, 7894 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:07:45,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 667 transitions, 9392 flow [2024-06-20 16:07:54,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 667 transitions, 9141 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:54,072 INFO L231 Difference]: Finished difference. Result has 445 places, 646 transitions, 7950 flow [2024-06-20 16:07:54,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7643, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7950, PETRI_PLACES=445, PETRI_TRANSITIONS=646} [2024-06-20 16:07:54,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-20 16:07:54,073 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 646 transitions, 7950 flow [2024-06-20 16:07:54,073 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) [2024-06-20 16:07:54,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:54,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:54,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:07:54,073 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:54,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:54,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1532037382, now seen corresponding path program 1 times [2024-06-20 16:07:54,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:54,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236006614] [2024-06-20 16:07:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:55,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:55,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236006614] [2024-06-20 16:07:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236006614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:55,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:55,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156963719] [2024-06-20 16:07:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:55,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:55,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:55,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:55,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:55,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:55,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 646 transitions, 7950 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) [2024-06-20 16:07:55,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:55,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:55,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:57,188 INFO L124 PetriNetUnfolderBase]: 4145/6560 cut-off events. [2024-06-20 16:07:57,188 INFO L125 PetriNetUnfolderBase]: For 1576461/1576463 co-relation queries the response was YES. [2024-06-20 16:07:57,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66664 conditions, 6560 events. 4145/6560 cut-off events. For 1576461/1576463 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 40310 event pairs, 758 based on Foata normal form. 4/6561 useless extension candidates. Maximal degree in co-relation 66459. Up to 6128 conditions per place. [2024-06-20 16:07:57,300 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 602 selfloop transitions, 71 changer transitions 0/677 dead transitions. [2024-06-20 16:07:57,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 677 transitions, 9536 flow [2024-06-20 16:07:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 16:07:57,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-20 16:07:57,301 INFO L175 Difference]: Start difference. First operand has 445 places, 646 transitions, 7950 flow. Second operand 10 states and 171 transitions. [2024-06-20 16:07:57,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 677 transitions, 9536 flow [2024-06-20 16:08:04,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 677 transitions, 9267 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:04,641 INFO L231 Difference]: Finished difference. Result has 448 places, 650 transitions, 7987 flow [2024-06-20 16:08:04,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7681, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7987, PETRI_PLACES=448, PETRI_TRANSITIONS=650} [2024-06-20 16:08:04,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 16:08:04,642 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 650 transitions, 7987 flow [2024-06-20 16:08:04,642 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) [2024-06-20 16:08:04,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:04,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:04,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:08:04,642 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:04,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:04,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1483204999, now seen corresponding path program 1 times [2024-06-20 16:08:04,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:04,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122855940] [2024-06-20 16:08:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:05,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122855940] [2024-06-20 16:08:05,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122855940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:05,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:05,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:05,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460567200] [2024-06-20 16:08:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:05,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:05,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:05,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 650 transitions, 7987 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) [2024-06-20 16:08:05,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:05,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:05,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:07,601 INFO L124 PetriNetUnfolderBase]: 4155/6572 cut-off events. [2024-06-20 16:08:07,601 INFO L125 PetriNetUnfolderBase]: For 1606047/1606049 co-relation queries the response was YES. [2024-06-20 16:08:07,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67687 conditions, 6572 events. 4155/6572 cut-off events. For 1606047/1606049 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 40364 event pairs, 757 based on Foata normal form. 4/6573 useless extension candidates. Maximal degree in co-relation 67481. Up to 6197 conditions per place. [2024-06-20 16:08:07,713 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 612 selfloop transitions, 61 changer transitions 0/677 dead transitions. [2024-06-20 16:08:07,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 677 transitions, 9531 flow [2024-06-20 16:08:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:08:07,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 16:08:07,714 INFO L175 Difference]: Start difference. First operand has 448 places, 650 transitions, 7987 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:08:07,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 677 transitions, 9531 flow [2024-06-20 16:08:17,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 677 transitions, 9263 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-20 16:08:17,228 INFO L231 Difference]: Finished difference. Result has 449 places, 653 transitions, 7957 flow [2024-06-20 16:08:17,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7719, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7957, PETRI_PLACES=449, PETRI_TRANSITIONS=653} [2024-06-20 16:08:17,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-20 16:08:17,229 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 653 transitions, 7957 flow [2024-06-20 16:08:17,229 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) [2024-06-20 16:08:17,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:17,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:17,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 16:08:17,229 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:17,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:17,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1839281474, now seen corresponding path program 1 times [2024-06-20 16:08:17,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:17,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499697364] [2024-06-20 16:08:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:17,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:18,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:18,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499697364] [2024-06-20 16:08:18,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499697364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:18,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:18,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:18,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570518739] [2024-06-20 16:08:18,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:18,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:18,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:18,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:18,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 653 transitions, 7957 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) [2024-06-20 16:08:18,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:18,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:18,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:19,971 INFO L124 PetriNetUnfolderBase]: 4207/6644 cut-off events. [2024-06-20 16:08:19,971 INFO L125 PetriNetUnfolderBase]: For 1696541/1696543 co-relation queries the response was YES. [2024-06-20 16:08:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69474 conditions, 6644 events. 4207/6644 cut-off events. For 1696541/1696543 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 40820 event pairs, 756 based on Foata normal form. 6/6647 useless extension candidates. Maximal degree in co-relation 69267. Up to 6168 conditions per place. [2024-06-20 16:08:20,090 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 603 selfloop transitions, 84 changer transitions 0/691 dead transitions. [2024-06-20 16:08:20,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 691 transitions, 9993 flow [2024-06-20 16:08:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:08:20,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:08:20,091 INFO L175 Difference]: Start difference. First operand has 449 places, 653 transitions, 7957 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:08:20,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 691 transitions, 9993 flow [2024-06-20 16:08:29,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 691 transitions, 9783 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:29,279 INFO L231 Difference]: Finished difference. Result has 452 places, 665 transitions, 8231 flow [2024-06-20 16:08:29,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7747, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8231, PETRI_PLACES=452, PETRI_TRANSITIONS=665} [2024-06-20 16:08:29,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 16:08:29,280 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 665 transitions, 8231 flow [2024-06-20 16:08:29,280 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) [2024-06-20 16:08:29,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:29,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:29,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 16:08:29,280 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:29,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2065702183, now seen corresponding path program 2 times [2024-06-20 16:08:29,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:29,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586932461] [2024-06-20 16:08:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:29,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:30,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:30,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586932461] [2024-06-20 16:08:30,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586932461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:30,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:30,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:30,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420145783] [2024-06-20 16:08:30,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:30,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:30,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:30,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:30,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 665 transitions, 8231 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) [2024-06-20 16:08:30,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:30,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:30,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:32,181 INFO L124 PetriNetUnfolderBase]: 4249/6704 cut-off events. [2024-06-20 16:08:32,181 INFO L125 PetriNetUnfolderBase]: For 1750297/1750299 co-relation queries the response was YES. [2024-06-20 16:08:32,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71724 conditions, 6704 events. 4249/6704 cut-off events. For 1750297/1750299 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 41164 event pairs, 760 based on Foata normal form. 4/6705 useless extension candidates. Maximal degree in co-relation 71515. Up to 6064 conditions per place. [2024-06-20 16:08:32,304 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 567 selfloop transitions, 128 changer transitions 0/699 dead transitions. [2024-06-20 16:08:32,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 699 transitions, 10643 flow [2024-06-20 16:08:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:08:32,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:08:32,305 INFO L175 Difference]: Start difference. First operand has 452 places, 665 transitions, 8231 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:08:32,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 699 transitions, 10643 flow [2024-06-20 16:08:42,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 699 transitions, 10447 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:42,326 INFO L231 Difference]: Finished difference. Result has 457 places, 674 transitions, 8641 flow [2024-06-20 16:08:42,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8641, PETRI_PLACES=457, PETRI_TRANSITIONS=674} [2024-06-20 16:08:42,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-20 16:08:42,327 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 674 transitions, 8641 flow [2024-06-20 16:08:42,327 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) [2024-06-20 16:08:42,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:42,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:42,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 16:08:42,328 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:42,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:42,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1839275677, now seen corresponding path program 3 times [2024-06-20 16:08:42,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:42,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27442255] [2024-06-20 16:08:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:42,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:43,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:43,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27442255] [2024-06-20 16:08:43,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27442255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:43,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:43,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:43,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053583809] [2024-06-20 16:08:43,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:43,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:43,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:43,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:43,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 674 transitions, 8641 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) [2024-06-20 16:08:43,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:43,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:43,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:45,244 INFO L124 PetriNetUnfolderBase]: 4243/6694 cut-off events. [2024-06-20 16:08:45,244 INFO L125 PetriNetUnfolderBase]: For 1755153/1755155 co-relation queries the response was YES. [2024-06-20 16:08:45,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71598 conditions, 6694 events. 4243/6694 cut-off events. For 1755153/1755155 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41092 event pairs, 760 based on Foata normal form. 4/6695 useless extension candidates. Maximal degree in co-relation 71387. Up to 6059 conditions per place. [2024-06-20 16:08:45,362 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 569 selfloop transitions, 125 changer transitions 0/698 dead transitions. [2024-06-20 16:08:45,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 698 transitions, 10427 flow [2024-06-20 16:08:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:08:45,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:08:45,363 INFO L175 Difference]: Start difference. First operand has 457 places, 674 transitions, 8641 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:08:45,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 698 transitions, 10427 flow [2024-06-20 16:08:55,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 698 transitions, 10133 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:55,053 INFO L231 Difference]: Finished difference. Result has 462 places, 674 transitions, 8605 flow [2024-06-20 16:08:55,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8347, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8605, PETRI_PLACES=462, PETRI_TRANSITIONS=674} [2024-06-20 16:08:55,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-20 16:08:55,054 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 674 transitions, 8605 flow [2024-06-20 16:08:55,054 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) [2024-06-20 16:08:55,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:55,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:55,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 16:08:55,055 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:55,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1483061004, now seen corresponding path program 2 times [2024-06-20 16:08:55,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:55,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849487188] [2024-06-20 16:08:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:55,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:56,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:56,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849487188] [2024-06-20 16:08:56,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849487188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:56,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:56,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:56,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647422517] [2024-06-20 16:08:56,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:56,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:56,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:56,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:56,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:56,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 674 transitions, 8605 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) [2024-06-20 16:08:56,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:56,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:56,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:58,001 INFO L124 PetriNetUnfolderBase]: 4248/6713 cut-off events. [2024-06-20 16:08:58,001 INFO L125 PetriNetUnfolderBase]: For 1765177/1765179 co-relation queries the response was YES. [2024-06-20 16:08:58,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71881 conditions, 6713 events. 4248/6713 cut-off events. For 1765177/1765179 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 41353 event pairs, 751 based on Foata normal form. 3/6713 useless extension candidates. Maximal degree in co-relation 71668. Up to 6368 conditions per place. [2024-06-20 16:08:58,119 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 653 selfloop transitions, 74 changer transitions 0/731 dead transitions. [2024-06-20 16:08:58,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 731 transitions, 10676 flow [2024-06-20 16:08:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:08:58,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:08:58,120 INFO L175 Difference]: Start difference. First operand has 462 places, 674 transitions, 8605 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:08:58,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 731 transitions, 10676 flow [2024-06-20 16:09:04,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 731 transitions, 10364 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:09:04,983 INFO L231 Difference]: Finished difference. Result has 466 places, 710 transitions, 9104 flow [2024-06-20 16:09:04,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8331, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9104, PETRI_PLACES=466, PETRI_TRANSITIONS=710} [2024-06-20 16:09:04,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-20 16:09:04,983 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 710 transitions, 9104 flow [2024-06-20 16:09:04,983 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) [2024-06-20 16:09:04,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:04,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 16:09:04,984 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:04,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1251957438, now seen corresponding path program 2 times [2024-06-20 16:09:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:04,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489918059] [2024-06-20 16:09:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:04,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:05,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489918059] [2024-06-20 16:09:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489918059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:05,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:05,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:05,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830982340] [2024-06-20 16:09:05,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:05,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:05,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:05,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:05,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:05,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:05,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 710 transitions, 9104 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) [2024-06-20 16:09:05,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:05,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:05,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:08,107 INFO L124 PetriNetUnfolderBase]: 4268/6735 cut-off events. [2024-06-20 16:09:08,107 INFO L125 PetriNetUnfolderBase]: For 1823249/1823251 co-relation queries the response was YES. [2024-06-20 16:09:08,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72797 conditions, 6735 events. 4268/6735 cut-off events. For 1823249/1823251 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 41417 event pairs, 763 based on Foata normal form. 6/6738 useless extension candidates. Maximal degree in co-relation 72580. Up to 6455 conditions per place. [2024-06-20 16:09:08,226 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 680 selfloop transitions, 49 changer transitions 0/733 dead transitions. [2024-06-20 16:09:08,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 733 transitions, 10722 flow [2024-06-20 16:09:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:09:08,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:09:08,227 INFO L175 Difference]: Start difference. First operand has 466 places, 710 transitions, 9104 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:09:08,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 733 transitions, 10722 flow [2024-06-20 16:09:18,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 733 transitions, 10571 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:18,961 INFO L231 Difference]: Finished difference. Result has 472 places, 715 transitions, 9155 flow [2024-06-20 16:09:18,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8953, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9155, PETRI_PLACES=472, PETRI_TRANSITIONS=715} [2024-06-20 16:09:18,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-20 16:09:18,961 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 715 transitions, 9155 flow [2024-06-20 16:09:18,961 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) [2024-06-20 16:09:18,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:18,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 16:09:18,962 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:18,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash -279593795, now seen corresponding path program 4 times [2024-06-20 16:09:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:18,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889646474] [2024-06-20 16:09:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:18,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:19,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:19,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889646474] [2024-06-20 16:09:19,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889646474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:19,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:19,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:19,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005917574] [2024-06-20 16:09:19,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:19,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:19,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:19,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:20,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:20,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 715 transitions, 9155 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) [2024-06-20 16:09:20,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:20,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:20,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:22,446 INFO L124 PetriNetUnfolderBase]: 4278/6755 cut-off events. [2024-06-20 16:09:22,446 INFO L125 PetriNetUnfolderBase]: For 1824778/1824780 co-relation queries the response was YES. [2024-06-20 16:09:22,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73047 conditions, 6755 events. 4278/6755 cut-off events. For 1824778/1824780 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 41618 event pairs, 760 based on Foata normal form. 4/6756 useless extension candidates. Maximal degree in co-relation 72828. Up to 6484 conditions per place. [2024-06-20 16:09:22,560 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 688 selfloop transitions, 44 changer transitions 0/736 dead transitions. [2024-06-20 16:09:22,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 736 transitions, 10787 flow [2024-06-20 16:09:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 16:09:22,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 16:09:22,561 INFO L175 Difference]: Start difference. First operand has 472 places, 715 transitions, 9155 flow. Second operand 9 states and 150 transitions. [2024-06-20 16:09:22,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 736 transitions, 10787 flow [2024-06-20 16:09:31,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 736 transitions, 10619 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:31,832 INFO L231 Difference]: Finished difference. Result has 475 places, 718 transitions, 9179 flow [2024-06-20 16:09:31,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8987, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9179, PETRI_PLACES=475, PETRI_TRANSITIONS=718} [2024-06-20 16:09:31,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-20 16:09:31,833 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 718 transitions, 9179 flow [2024-06-20 16:09:31,833 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) [2024-06-20 16:09:31,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:31,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:31,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 16:09:31,833 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:31,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:31,833 INFO L85 PathProgramCache]: Analyzing trace with hash -290438711, now seen corresponding path program 4 times [2024-06-20 16:09:31,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:31,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556258083] [2024-06-20 16:09:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:31,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:32,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:32,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556258083] [2024-06-20 16:09:32,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556258083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:32,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:32,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:32,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78553652] [2024-06-20 16:09:32,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:32,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:32,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:32,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:32,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 718 transitions, 9179 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) [2024-06-20 16:09:32,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:32,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:32,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:35,486 INFO L124 PetriNetUnfolderBase]: 4288/6765 cut-off events. [2024-06-20 16:09:35,486 INFO L125 PetriNetUnfolderBase]: For 1835331/1835331 co-relation queries the response was YES. [2024-06-20 16:09:35,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73162 conditions, 6765 events. 4288/6765 cut-off events. For 1835331/1835331 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41582 event pairs, 753 based on Foata normal form. 1/6763 useless extension candidates. Maximal degree in co-relation 72942. Up to 6408 conditions per place. [2024-06-20 16:09:35,606 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 653 selfloop transitions, 83 changer transitions 0/740 dead transitions. [2024-06-20 16:09:35,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 740 transitions, 10794 flow [2024-06-20 16:09:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:09:35,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:09:35,607 INFO L175 Difference]: Start difference. First operand has 475 places, 718 transitions, 9179 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:09:35,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 740 transitions, 10794 flow [2024-06-20 16:09:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 740 transitions, 10632 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:45,098 INFO L231 Difference]: Finished difference. Result has 477 places, 724 transitions, 9290 flow [2024-06-20 16:09:45,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9017, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9290, PETRI_PLACES=477, PETRI_TRANSITIONS=724} [2024-06-20 16:09:45,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-20 16:09:45,099 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 724 transitions, 9290 flow [2024-06-20 16:09:45,099 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) [2024-06-20 16:09:45,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:45,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:45,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 16:09:45,099 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:45,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:45,100 INFO L85 PathProgramCache]: Analyzing trace with hash -286945228, now seen corresponding path program 3 times [2024-06-20 16:09:45,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:45,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918857368] [2024-06-20 16:09:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:45,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:45,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:45,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918857368] [2024-06-20 16:09:45,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918857368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:45,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:45,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:45,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282589234] [2024-06-20 16:09:45,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:45,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:45,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:45,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:46,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:46,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 724 transitions, 9290 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) [2024-06-20 16:09:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:46,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:48,563 INFO L124 PetriNetUnfolderBase]: 4340/6849 cut-off events. [2024-06-20 16:09:48,563 INFO L125 PetriNetUnfolderBase]: For 1938191/1938193 co-relation queries the response was YES. [2024-06-20 16:09:48,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74631 conditions, 6849 events. 4340/6849 cut-off events. For 1938191/1938193 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 42269 event pairs, 763 based on Foata normal form. 6/6852 useless extension candidates. Maximal degree in co-relation 74410. Up to 6475 conditions per place. [2024-06-20 16:09:48,679 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 683 selfloop transitions, 66 changer transitions 0/753 dead transitions. [2024-06-20 16:09:48,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 753 transitions, 11365 flow [2024-06-20 16:09:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:09:48,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:09:48,680 INFO L175 Difference]: Start difference. First operand has 477 places, 724 transitions, 9290 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:09:48,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 753 transitions, 11365 flow [2024-06-20 16:10:01,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 753 transitions, 11167 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:01,586 INFO L231 Difference]: Finished difference. Result has 481 places, 730 transitions, 9404 flow [2024-06-20 16:10:01,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9092, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9404, PETRI_PLACES=481, PETRI_TRANSITIONS=730} [2024-06-20 16:10:01,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-20 16:10:01,587 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 730 transitions, 9404 flow [2024-06-20 16:10:01,587 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) [2024-06-20 16:10:01,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:01,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:01,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 16:10:01,588 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:01,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash -286945445, now seen corresponding path program 5 times [2024-06-20 16:10:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:01,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124642777] [2024-06-20 16:10:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:01,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:02,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:02,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124642777] [2024-06-20 16:10:02,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124642777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:02,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:02,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:02,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709633823] [2024-06-20 16:10:02,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:02,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:02,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:02,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:02,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:02,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:02,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 730 transitions, 9404 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) [2024-06-20 16:10:02,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:02,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:02,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:05,087 INFO L124 PetriNetUnfolderBase]: 4366/6887 cut-off events. [2024-06-20 16:10:05,087 INFO L125 PetriNetUnfolderBase]: For 1964228/1964230 co-relation queries the response was YES. [2024-06-20 16:10:05,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75531 conditions, 6887 events. 4366/6887 cut-off events. For 1964228/1964230 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42558 event pairs, 772 based on Foata normal form. 4/6888 useless extension candidates. Maximal degree in co-relation 75309. Up to 6521 conditions per place. [2024-06-20 16:10:05,204 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 680 selfloop transitions, 73 changer transitions 0/757 dead transitions. [2024-06-20 16:10:05,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 757 transitions, 11505 flow [2024-06-20 16:10:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:10:05,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:10:05,205 INFO L175 Difference]: Start difference. First operand has 481 places, 730 transitions, 9404 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:10:05,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 757 transitions, 11505 flow [2024-06-20 16:10:16,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 757 transitions, 11373 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:16,775 INFO L231 Difference]: Finished difference. Result has 485 places, 736 transitions, 9626 flow [2024-06-20 16:10:16,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9272, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9626, PETRI_PLACES=485, PETRI_TRANSITIONS=736} [2024-06-20 16:10:16,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-20 16:10:16,776 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 736 transitions, 9626 flow [2024-06-20 16:10:16,776 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) [2024-06-20 16:10:16,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:16,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:16,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 16:10:16,776 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:16,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1259581950, now seen corresponding path program 3 times [2024-06-20 16:10:16,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:16,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554361466] [2024-06-20 16:10:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:16,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:17,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:17,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554361466] [2024-06-20 16:10:17,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554361466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:17,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:17,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:17,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640991936] [2024-06-20 16:10:17,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:17,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:17,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:17,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:17,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 736 transitions, 9626 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) [2024-06-20 16:10:17,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:17,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:17,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:20,278 INFO L124 PetriNetUnfolderBase]: 4371/6894 cut-off events. [2024-06-20 16:10:20,278 INFO L125 PetriNetUnfolderBase]: For 1976339/1976341 co-relation queries the response was YES. [2024-06-20 16:10:20,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75805 conditions, 6894 events. 4371/6894 cut-off events. For 1976339/1976341 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 42559 event pairs, 772 based on Foata normal form. 3/6894 useless extension candidates. Maximal degree in co-relation 75581. Up to 6618 conditions per place. [2024-06-20 16:10:20,416 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 711 selfloop transitions, 43 changer transitions 0/758 dead transitions. [2024-06-20 16:10:20,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 758 transitions, 11316 flow [2024-06-20 16:10:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:10:20,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 16:10:20,418 INFO L175 Difference]: Start difference. First operand has 485 places, 736 transitions, 9626 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:10:20,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 758 transitions, 11316 flow [2024-06-20 16:10:33,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 758 transitions, 11148 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:33,010 INFO L231 Difference]: Finished difference. Result has 490 places, 742 transitions, 9704 flow [2024-06-20 16:10:33,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9458, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9704, PETRI_PLACES=490, PETRI_TRANSITIONS=742} [2024-06-20 16:10:33,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-20 16:10:33,011 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 742 transitions, 9704 flow [2024-06-20 16:10:33,011 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) [2024-06-20 16:10:33,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:33,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:33,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 16:10:33,012 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:33,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash 37926473, now seen corresponding path program 4 times [2024-06-20 16:10:33,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:33,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897108065] [2024-06-20 16:10:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:33,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:34,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897108065] [2024-06-20 16:10:34,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897108065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:34,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:34,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:34,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791840226] [2024-06-20 16:10:34,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:34,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:34,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:34,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:34,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:34,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 742 transitions, 9704 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) [2024-06-20 16:10:34,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:34,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:34,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:36,662 INFO L124 PetriNetUnfolderBase]: 4376/6895 cut-off events. [2024-06-20 16:10:36,662 INFO L125 PetriNetUnfolderBase]: For 2002565/2002565 co-relation queries the response was YES. [2024-06-20 16:10:36,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76575 conditions, 6895 events. 4376/6895 cut-off events. For 2002565/2002565 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 42475 event pairs, 753 based on Foata normal form. 1/6893 useless extension candidates. Maximal degree in co-relation 76348. Up to 6564 conditions per place. [2024-06-20 16:10:36,792 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 678 selfloop transitions, 79 changer transitions 0/761 dead transitions. [2024-06-20 16:10:36,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 761 transitions, 11378 flow [2024-06-20 16:10:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:10:36,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:10:36,793 INFO L175 Difference]: Start difference. First operand has 490 places, 742 transitions, 9704 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:10:36,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 761 transitions, 11378 flow [2024-06-20 16:10:48,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 761 transitions, 11243 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:48,570 INFO L231 Difference]: Finished difference. Result has 495 places, 745 transitions, 9853 flow [2024-06-20 16:10:48,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9569, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9853, PETRI_PLACES=495, PETRI_TRANSITIONS=745} [2024-06-20 16:10:48,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-20 16:10:48,570 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 745 transitions, 9853 flow [2024-06-20 16:10:48,570 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) [2024-06-20 16:10:48,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:48,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:48,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 16:10:48,570 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:48,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:48,571 INFO L85 PathProgramCache]: Analyzing trace with hash -279593578, now seen corresponding path program 4 times [2024-06-20 16:10:48,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:48,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237621776] [2024-06-20 16:10:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:48,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:49,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237621776] [2024-06-20 16:10:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237621776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:49,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:49,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:49,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455890000] [2024-06-20 16:10:49,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:49,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:49,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 745 transitions, 9853 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) [2024-06-20 16:10:49,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:49,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:49,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:51,909 INFO L124 PetriNetUnfolderBase]: 4364/6877 cut-off events. [2024-06-20 16:10:51,909 INFO L125 PetriNetUnfolderBase]: For 2015038/2015040 co-relation queries the response was YES. [2024-06-20 16:10:51,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76070 conditions, 6877 events. 4364/6877 cut-off events. For 2015038/2015040 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 42365 event pairs, 755 based on Foata normal form. 6/6880 useless extension candidates. Maximal degree in co-relation 75841. Up to 6567 conditions per place. [2024-06-20 16:10:52,193 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 707 selfloop transitions, 54 changer transitions 0/765 dead transitions. [2024-06-20 16:10:52,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 765 transitions, 11467 flow [2024-06-20 16:10:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:10:52,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:10:52,194 INFO L175 Difference]: Start difference. First operand has 495 places, 745 transitions, 9853 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:10:52,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 765 transitions, 11467 flow [2024-06-20 16:11:04,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 765 transitions, 11165 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:04,092 INFO L231 Difference]: Finished difference. Result has 497 places, 745 transitions, 9665 flow [2024-06-20 16:11:04,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9551, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9665, PETRI_PLACES=497, PETRI_TRANSITIONS=745} [2024-06-20 16:11:04,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-20 16:11:04,093 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 745 transitions, 9665 flow [2024-06-20 16:11:04,093 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) [2024-06-20 16:11:04,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:04,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 16:11:04,094 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:04,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash 363119113, now seen corresponding path program 5 times [2024-06-20 16:11:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:04,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026409380] [2024-06-20 16:11:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:04,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:05,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026409380] [2024-06-20 16:11:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026409380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:05,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:05,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:05,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696967055] [2024-06-20 16:11:05,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:05,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:05,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:05,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:11:05,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 745 transitions, 9665 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) [2024-06-20 16:11:05,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:05,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:11:05,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:07,686 INFO L124 PetriNetUnfolderBase]: 4389/6915 cut-off events. [2024-06-20 16:11:07,686 INFO L125 PetriNetUnfolderBase]: For 2001783/2001783 co-relation queries the response was YES. [2024-06-20 16:11:07,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76271 conditions, 6915 events. 4389/6915 cut-off events. For 2001783/2001783 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 42625 event pairs, 762 based on Foata normal form. 1/6907 useless extension candidates. Maximal degree in co-relation 76041. Up to 6543 conditions per place. [2024-06-20 16:11:07,982 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 676 selfloop transitions, 97 changer transitions 0/777 dead transitions. [2024-06-20 16:11:07,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 777 transitions, 11491 flow [2024-06-20 16:11:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:11:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:11:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-20 16:11:07,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-20 16:11:07,985 INFO L175 Difference]: Start difference. First operand has 497 places, 745 transitions, 9665 flow. Second operand 10 states and 163 transitions. [2024-06-20 16:11:07,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 777 transitions, 11491 flow Killed by 15