./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix011.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix011.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix011.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-eb4cb34-m [2024-06-21 20:37:50,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:37:50,346 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:37:50,352 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:37:50,352 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:37:50,377 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:37:50,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:37:50,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:37:50,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:37:50,382 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:37:50,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:37:50,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:37:50,383 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:37:50,384 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:37:50,384 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:37:50,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:37:50,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:37:50,385 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:37:50,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:37:50,385 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:37:50,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:37:50,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:37:50,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:37:50,386 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:37:50,387 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:37:50,387 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:37:50,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:37:50,387 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:37:50,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:37:50,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:37:50,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:37:50,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:37:50,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:37:50,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:37:50,390 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:37:50,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:37:50,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:37:50,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:37:50,390 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:37:50,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:37:50,391 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:37:50,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:37:50,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:37:50,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:37:50,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:37:50,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:37:50,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:37:50,642 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:37:50,643 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:37:50,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix011.opt.yml/witness.yml [2024-06-21 20:37:50,801 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:37:50,801 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:37:50,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-21 20:37:51,674 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:37:51,949 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:37:51,949 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011.opt.i [2024-06-21 20:37:51,960 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31e4071d6/2649e0ceec0f4cc78c2e4bed77c36670/FLAGc17f3ae55 [2024-06-21 20:37:51,970 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31e4071d6/2649e0ceec0f4cc78c2e4bed77c36670 [2024-06-21 20:37:51,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:37:51,971 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:37:51,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:37:51,972 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:37:51,975 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:37:51,976 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:37:50" (1/2) ... [2024-06-21 20:37:51,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd8dfbb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:37:51, skipping insertion in model container [2024-06-21 20:37:51,977 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:37:50" (1/2) ... [2024-06-21 20:37:51,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20eb4adf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:37:51, skipping insertion in model container [2024-06-21 20:37:51,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:37:51" (2/2) ... [2024-06-21 20:37:51,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd8dfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:51, skipping insertion in model container [2024-06-21 20:37:51,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:37:51" (2/2) ... [2024-06-21 20:37:51,979 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:37:52,062 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:37:52,063 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((! multithreaded || z$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:37:52,063 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || z$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:37:52,063 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((! multithreaded || z$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 20:37:52,064 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:37:52,064 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-21 20:37:52,103 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:37:52,430 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:37:52,439 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:37:52,605 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:37:52,637 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:37:52,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52 WrapperNode [2024-06-21 20:37:52,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:37:52,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:37:52,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:37:52,639 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:37:52,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,688 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-21 20:37:52,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:37:52,689 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:37:52,689 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:37:52,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:37:52,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,701 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,721 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]. [2024-06-21 20:37:52,721 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,722 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,730 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,731 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,733 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,734 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,737 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:37:52,738 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:37:52,738 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:37:52,738 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:37:52,739 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (1/1) ... [2024-06-21 20:37:52,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:37:52,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:37:52,777 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) [2024-06-21 20:37:52,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:37:52,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:37:52,806 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:37:52,806 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:37:52,807 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:37:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:37:52,807 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:37:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:37:52,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:37:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:37:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:37:52,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:37:52,793 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 [2024-06-21 20:37:52,812 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:37:52,938 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:37:52,939 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:37:53,229 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:37:53,229 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:37:53,381 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:37:53,381 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:37:53,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:37:53 BoogieIcfgContainer [2024-06-21 20:37:53,383 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:37:53,385 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:37:53,385 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:37:53,388 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:37:53,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:37:50" (1/4) ... [2024-06-21 20:37:53,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d4ea8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:37:53, skipping insertion in model container [2024-06-21 20:37:53,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:37:51" (2/4) ... [2024-06-21 20:37:53,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d4ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:37:53, skipping insertion in model container [2024-06-21 20:37:53,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:37:52" (3/4) ... [2024-06-21 20:37:53,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d4ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:37:53, skipping insertion in model container [2024-06-21 20:37:53,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:37:53" (4/4) ... [2024-06-21 20:37:53,390 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011.opt.i [2024-06-21 20:37:53,405 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:37:53,405 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:37:53,405 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:37:53,450 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:37:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:37:53,502 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 20:37:53,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:37:53,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:37:53,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 20:37:53,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 20:37:53,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:37:53,522 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;@7e971b26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:37:53,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:37:53,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:37:53,528 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:37:53,528 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:37:53,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:53,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:37:53,529 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)] === [2024-06-21 20:37:53,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash 401253807, now seen corresponding path program 1 times [2024-06-21 20:37:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532774724] [2024-06-21 20:37:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:54,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:54,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532774724] [2024-06-21 20:37:54,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532774724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:54,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:54,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:37:54,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990444540] [2024-06-21 20:37:54,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:54,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:37:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:37:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:37:54,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 20:37:54,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 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) [2024-06-21 20:37:54,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:54,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 20:37:54,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:55,133 INFO L124 PetriNetUnfolderBase]: 1359/2139 cut-off events. [2024-06-21 20:37:55,133 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 20:37:55,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 2139 events. 1359/2139 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10954 event pairs, 941 based on Foata normal form. 1/2060 useless extension candidates. Maximal degree in co-relation 4241. Up to 2029 conditions per place. [2024-06-21 20:37:55,149 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 20:37:55,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-21 20:37:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:37:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:37:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-21 20:37:55,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-21 20:37:55,160 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-21 20:37:55,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-21 20:37:55,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:55,165 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 20:37:55,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 20:37:55,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 20:37:55,170 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 20:37:55,170 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) [2024-06-21 20:37:55,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:55,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:55,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:37:55,170 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)] === [2024-06-21 20:37:55,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash -942118130, now seen corresponding path program 1 times [2024-06-21 20:37:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:55,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249662437] [2024-06-21 20:37:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:55,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:56,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:56,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249662437] [2024-06-21 20:37:56,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249662437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:56,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:56,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:37:56,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371275522] [2024-06-21 20:37:56,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:37:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:37:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:37:56,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:37:56,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 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) [2024-06-21 20:37:56,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:56,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:37:56,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:56,505 INFO L124 PetriNetUnfolderBase]: 1560/2387 cut-off events. [2024-06-21 20:37:56,506 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-06-21 20:37:56,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 2387 events. 1560/2387 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11952 event pairs, 930 based on Foata normal form. 3/2377 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-21 20:37:56,517 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 20:37:56,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-21 20:37:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:37:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:37:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 20:37:56,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 20:37:56,520 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-21 20:37:56,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-21 20:37:56,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:37:56,523 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 20:37:56,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 20:37:56,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 20:37:56,524 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 20:37:56,524 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) [2024-06-21 20:37:56,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:56,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:37:56,527 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)] === [2024-06-21 20:37:56,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash 859110040, now seen corresponding path program 1 times [2024-06-21 20:37:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:56,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998998220] [2024-06-21 20:37:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:57,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:57,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998998220] [2024-06-21 20:37:57,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998998220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:57,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:57,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:37:57,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432022825] [2024-06-21 20:37:57,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:57,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:37:57,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:37:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:37:57,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:37:57,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:57,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:57,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:37:57,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:58,019 INFO L124 PetriNetUnfolderBase]: 1568/2455 cut-off events. [2024-06-21 20:37:58,019 INFO L125 PetriNetUnfolderBase]: For 1364/1364 co-relation queries the response was YES. [2024-06-21 20:37:58,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6088 conditions, 2455 events. 1568/2455 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12627 event pairs, 669 based on Foata normal form. 5/2454 useless extension candidates. Maximal degree in co-relation 6074. Up to 2248 conditions per place. [2024-06-21 20:37:58,029 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 20:37:58,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 398 flow [2024-06-21 20:37:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:37:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:37:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 20:37:58,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-21 20:37:58,031 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 133 transitions. [2024-06-21 20:37:58,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 398 flow [2024-06-21 20:37:58,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:37:58,033 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-21 20:37:58,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-21 20:37:58,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-21 20:37:58,034 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-21 20:37:58,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:58,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:58,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:58,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:37:58,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:58,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1607346961, now seen corresponding path program 1 times [2024-06-21 20:37:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:58,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845029511] [2024-06-21 20:37:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:58,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:59,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:59,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845029511] [2024-06-21 20:37:59,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845029511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:59,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:59,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:37:59,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274002335] [2024-06-21 20:37:59,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:37:59,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:37:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:37:59,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 20:37:59,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 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) [2024-06-21 20:37:59,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:59,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 20:37:59,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:59,810 INFO L124 PetriNetUnfolderBase]: 1580/2475 cut-off events. [2024-06-21 20:37:59,810 INFO L125 PetriNetUnfolderBase]: For 3227/3230 co-relation queries the response was YES. [2024-06-21 20:37:59,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7232 conditions, 2475 events. 1580/2475 cut-off events. For 3227/3230 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12769 event pairs, 481 based on Foata normal form. 12/2481 useless extension candidates. Maximal degree in co-relation 7215. Up to 2216 conditions per place. [2024-06-21 20:37:59,823 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 20:37:59,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 501 flow [2024-06-21 20:37:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:37:59,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 20:37:59,825 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:37:59,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 501 flow [2024-06-21 20:37:59,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 493 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 20:37:59,829 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-21 20:37:59,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-21 20:37:59,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-21 20:37:59,830 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-21 20:37:59,830 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) [2024-06-21 20:37:59,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:59,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:59,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:37:59,831 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)] === [2024-06-21 20:37:59,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash 503880689, now seen corresponding path program 1 times [2024-06-21 20:37:59,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134827616] [2024-06-21 20:37:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:00,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134827616] [2024-06-21 20:38:00,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134827616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:00,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:00,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:38:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19133768] [2024-06-21 20:38:00,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:00,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:38:00,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:38:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:38:00,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:00,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 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) [2024-06-21 20:38:00,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:00,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:00,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:00,786 INFO L124 PetriNetUnfolderBase]: 1368/2206 cut-off events. [2024-06-21 20:38:00,787 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-21 20:38:00,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6977 conditions, 2206 events. 1368/2206 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11678 event pairs, 562 based on Foata normal form. 2/2185 useless extension candidates. Maximal degree in co-relation 6956. Up to 2036 conditions per place. [2024-06-21 20:38:00,799 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-21 20:38:00,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 437 flow [2024-06-21 20:38:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:38:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:38:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-21 20:38:00,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:38:00,800 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 105 transitions. [2024-06-21 20:38:00,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 437 flow [2024-06-21 20:38:00,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 387 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:00,804 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 269 flow [2024-06-21 20:38:00,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-21 20:38:00,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 20:38:00,805 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 269 flow [2024-06-21 20:38:00,805 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) [2024-06-21 20:38:00,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:00,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:00,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:38:00,806 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)] === [2024-06-21 20:38:00,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1599265881, now seen corresponding path program 1 times [2024-06-21 20:38:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:00,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203657546] [2024-06-21 20:38:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:01,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203657546] [2024-06-21 20:38:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203657546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:01,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:01,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:01,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723691711] [2024-06-21 20:38:01,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:01,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:01,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:01,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:01,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 269 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) [2024-06-21 20:38:01,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:01,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:01,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:02,000 INFO L124 PetriNetUnfolderBase]: 1606/2532 cut-off events. [2024-06-21 20:38:02,001 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-21 20:38:02,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8032 conditions, 2532 events. 1606/2532 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13048 event pairs, 676 based on Foata normal form. 2/2523 useless extension candidates. Maximal degree in co-relation 8009. Up to 2373 conditions per place. [2024-06-21 20:38:02,015 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 54 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-21 20:38:02,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 455 flow [2024-06-21 20:38:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 20:38:02,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:38:02,017 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 269 flow. Second operand 6 states and 119 transitions. [2024-06-21 20:38:02,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 455 flow [2024-06-21 20:38:02,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 433 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:02,021 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 301 flow [2024-06-21 20:38:02,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-21 20:38:02,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 20:38:02,022 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 301 flow [2024-06-21 20:38:02,022 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) [2024-06-21 20:38:02,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:02,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:38:02,023 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)] === [2024-06-21 20:38:02,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1026778578, now seen corresponding path program 1 times [2024-06-21 20:38:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:02,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448211075] [2024-06-21 20:38:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:02,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448211075] [2024-06-21 20:38:02,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448211075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:02,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233337507] [2024-06-21 20:38:02,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:02,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:02,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 301 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) [2024-06-21 20:38:02,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:02,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:02,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:03,232 INFO L124 PetriNetUnfolderBase]: 1745/2695 cut-off events. [2024-06-21 20:38:03,232 INFO L125 PetriNetUnfolderBase]: For 8633/8639 co-relation queries the response was YES. [2024-06-21 20:38:03,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9313 conditions, 2695 events. 1745/2695 cut-off events. For 8633/8639 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13692 event pairs, 726 based on Foata normal form. 8/2696 useless extension candidates. Maximal degree in co-relation 9290. Up to 2505 conditions per place. [2024-06-21 20:38:03,254 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-06-21 20:38:03,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 541 flow [2024-06-21 20:38:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 20:38:03,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-21 20:38:03,255 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 301 flow. Second operand 6 states and 128 transitions. [2024-06-21 20:38:03,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 541 flow [2024-06-21 20:38:03,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 511 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:03,261 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2024-06-21 20:38:03,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-21 20:38:03,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-21 20:38:03,262 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2024-06-21 20:38:03,262 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) [2024-06-21 20:38:03,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:03,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:03,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:38:03,262 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)] === [2024-06-21 20:38:03,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1101942896, now seen corresponding path program 2 times [2024-06-21 20:38:03,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:03,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384595727] [2024-06-21 20:38:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:03,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:03,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:03,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384595727] [2024-06-21 20:38:03,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384595727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:03,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:03,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:03,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073346027] [2024-06-21 20:38:03,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:03,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:03,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:03,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:03,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 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) [2024-06-21 20:38:03,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:03,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:03,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:04,460 INFO L124 PetriNetUnfolderBase]: 1733/2668 cut-off events. [2024-06-21 20:38:04,460 INFO L125 PetriNetUnfolderBase]: For 10399/10405 co-relation queries the response was YES. [2024-06-21 20:38:04,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9549 conditions, 2668 events. 1733/2668 cut-off events. For 10399/10405 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13484 event pairs, 740 based on Foata normal form. 3/2659 useless extension candidates. Maximal degree in co-relation 9525. Up to 2489 conditions per place. [2024-06-21 20:38:04,475 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 47 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2024-06-21 20:38:04,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 515 flow [2024-06-21 20:38:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 20:38:04,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 20:38:04,478 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 6 states and 124 transitions. [2024-06-21 20:38:04,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 515 flow [2024-06-21 20:38:04,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 486 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:38:04,484 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 362 flow [2024-06-21 20:38:04,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-21 20:38:04,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-21 20:38:04,487 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 362 flow [2024-06-21 20:38:04,487 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) [2024-06-21 20:38:04,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:04,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:04,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:38:04,487 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)] === [2024-06-21 20:38:04,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1962366126, now seen corresponding path program 1 times [2024-06-21 20:38:04,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:04,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860156605] [2024-06-21 20:38:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:04,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:05,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:05,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860156605] [2024-06-21 20:38:05,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860156605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:05,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:05,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:05,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443977990] [2024-06-21 20:38:05,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:05,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:05,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:05,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:05,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:05,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:05,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 362 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) [2024-06-21 20:38:05,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:05,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:05,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:05,842 INFO L124 PetriNetUnfolderBase]: 1590/2516 cut-off events. [2024-06-21 20:38:05,843 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-21 20:38:05,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9018 conditions, 2516 events. 1590/2516 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12963 event pairs, 634 based on Foata normal form. 4/2506 useless extension candidates. Maximal degree in co-relation 8993. Up to 2330 conditions per place. [2024-06-21 20:38:05,855 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-06-21 20:38:05,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 586 flow [2024-06-21 20:38:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:38:05,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:38:05,857 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 362 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:38:05,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 586 flow [2024-06-21 20:38:05,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 521 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:05,863 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 361 flow [2024-06-21 20:38:05,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-21 20:38:05,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-21 20:38:05,864 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 361 flow [2024-06-21 20:38:05,864 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) [2024-06-21 20:38:05,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:05,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:05,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:38:05,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:05,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:05,865 INFO L85 PathProgramCache]: Analyzing trace with hash 526431080, now seen corresponding path program 1 times [2024-06-21 20:38:05,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:05,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96990153] [2024-06-21 20:38:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:05,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:06,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96990153] [2024-06-21 20:38:06,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96990153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:06,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:06,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:06,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522420542] [2024-06-21 20:38:06,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:06,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:06,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:06,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:06,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:06,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:06,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:06,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:07,218 INFO L124 PetriNetUnfolderBase]: 1856/2802 cut-off events. [2024-06-21 20:38:07,218 INFO L125 PetriNetUnfolderBase]: For 14900/14906 co-relation queries the response was YES. [2024-06-21 20:38:07,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10783 conditions, 2802 events. 1856/2802 cut-off events. For 14900/14906 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13775 event pairs, 731 based on Foata normal form. 5/2803 useless extension candidates. Maximal degree in co-relation 10757. Up to 2601 conditions per place. [2024-06-21 20:38:07,231 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-21 20:38:07,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 691 flow [2024-06-21 20:38:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:38:07,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 20:38:07,233 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 361 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:38:07,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 691 flow [2024-06-21 20:38:07,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 651 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:07,241 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 440 flow [2024-06-21 20:38:07,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-21 20:38:07,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-21 20:38:07,242 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 440 flow [2024-06-21 20:38:07,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:07,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:07,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:07,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:38:07,243 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)] === [2024-06-21 20:38:07,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash 199746596, now seen corresponding path program 2 times [2024-06-21 20:38:07,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:07,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103936709] [2024-06-21 20:38:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:07,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:07,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103936709] [2024-06-21 20:38:07,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103936709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:07,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:07,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:07,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140314048] [2024-06-21 20:38:07,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:07,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:07,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:07,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:07,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:07,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:07,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 440 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:07,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:07,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:07,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:08,540 INFO L124 PetriNetUnfolderBase]: 1867/2815 cut-off events. [2024-06-21 20:38:08,540 INFO L125 PetriNetUnfolderBase]: For 18516/18522 co-relation queries the response was YES. [2024-06-21 20:38:08,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11653 conditions, 2815 events. 1867/2815 cut-off events. For 18516/18522 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13848 event pairs, 745 based on Foata normal form. 3/2807 useless extension candidates. Maximal degree in co-relation 11626. Up to 2608 conditions per place. [2024-06-21 20:38:08,555 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 59 selfloop transitions, 34 changer transitions 0/98 dead transitions. [2024-06-21 20:38:08,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 822 flow [2024-06-21 20:38:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:38:08,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 20:38:08,557 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 440 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:38:08,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 822 flow [2024-06-21 20:38:08,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 786 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 20:38:08,566 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 542 flow [2024-06-21 20:38:08,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-21 20:38:08,567 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-21 20:38:08,567 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 542 flow [2024-06-21 20:38:08,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:08,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:08,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:08,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:38:08,568 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)] === [2024-06-21 20:38:08,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash 703562600, now seen corresponding path program 3 times [2024-06-21 20:38:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:08,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753369083] [2024-06-21 20:38:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:09,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:09,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753369083] [2024-06-21 20:38:09,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753369083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:09,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:09,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:09,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384128225] [2024-06-21 20:38:09,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:09,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:09,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:09,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:09,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:09,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:09,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:09,863 INFO L124 PetriNetUnfolderBase]: 1862/2808 cut-off events. [2024-06-21 20:38:09,863 INFO L125 PetriNetUnfolderBase]: For 21860/21866 co-relation queries the response was YES. [2024-06-21 20:38:09,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12123 conditions, 2808 events. 1862/2808 cut-off events. For 21860/21866 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13802 event pairs, 745 based on Foata normal form. 3/2800 useless extension candidates. Maximal degree in co-relation 12094. Up to 2605 conditions per place. [2024-06-21 20:38:09,878 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 58 selfloop transitions, 33 changer transitions 0/96 dead transitions. [2024-06-21 20:38:09,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 820 flow [2024-06-21 20:38:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:38:09,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 20:38:09,880 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 542 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:38:09,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 820 flow [2024-06-21 20:38:09,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 758 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:38:09,896 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 554 flow [2024-06-21 20:38:09,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-06-21 20:38:09,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-21 20:38:09,897 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 554 flow [2024-06-21 20:38:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:09,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:09,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:09,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:38:09,898 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:09,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:09,898 INFO L85 PathProgramCache]: Analyzing trace with hash 376619089, now seen corresponding path program 1 times [2024-06-21 20:38:09,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345539667] [2024-06-21 20:38:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:10,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345539667] [2024-06-21 20:38:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345539667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:10,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:10,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:38:10,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676420451] [2024-06-21 20:38:10,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:10,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:38:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:38:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:38:10,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:10,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:10,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:10,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:10,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:10,952 INFO L124 PetriNetUnfolderBase]: 1534/2473 cut-off events. [2024-06-21 20:38:10,953 INFO L125 PetriNetUnfolderBase]: For 20486/20486 co-relation queries the response was YES. [2024-06-21 20:38:10,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10554 conditions, 2473 events. 1534/2473 cut-off events. For 20486/20486 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13040 event pairs, 581 based on Foata normal form. 1/2471 useless extension candidates. Maximal degree in co-relation 10523. Up to 2252 conditions per place. [2024-06-21 20:38:10,968 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 66 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2024-06-21 20:38:10,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 744 flow [2024-06-21 20:38:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:38:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:38:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-21 20:38:10,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 20:38:10,969 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 554 flow. Second operand 5 states and 101 transitions. [2024-06-21 20:38:10,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 744 flow [2024-06-21 20:38:10,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 663 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:10,982 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 523 flow [2024-06-21 20:38:10,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=523, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-21 20:38:10,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-21 20:38:10,983 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 523 flow [2024-06-21 20:38:10,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:10,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:10,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:10,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:38:10,983 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:10,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291981, now seen corresponding path program 1 times [2024-06-21 20:38:10,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:10,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076510576] [2024-06-21 20:38:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:11,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:11,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076510576] [2024-06-21 20:38:11,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076510576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:11,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:11,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:11,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180603898] [2024-06-21 20:38:11,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:11,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:11,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:11,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 523 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) [2024-06-21 20:38:11,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:11,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:11,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:12,525 INFO L124 PetriNetUnfolderBase]: 1903/2881 cut-off events. [2024-06-21 20:38:12,526 INFO L125 PetriNetUnfolderBase]: For 27730/27733 co-relation queries the response was YES. [2024-06-21 20:38:12,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12922 conditions, 2881 events. 1903/2881 cut-off events. For 27730/27733 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14341 event pairs, 642 based on Foata normal form. 8/2885 useless extension candidates. Maximal degree in co-relation 12890. Up to 2522 conditions per place. [2024-06-21 20:38:12,540 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 76 selfloop transitions, 36 changer transitions 0/117 dead transitions. [2024-06-21 20:38:12,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 117 transitions, 941 flow [2024-06-21 20:38:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:38:12,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-21 20:38:12,542 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 523 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:38:12,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 117 transitions, 941 flow [2024-06-21 20:38:12,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 913 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:38:12,554 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 644 flow [2024-06-21 20:38:12,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-21 20:38:12,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-21 20:38:12,554 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 644 flow [2024-06-21 20:38:12,555 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) [2024-06-21 20:38:12,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:12,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:12,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:38:12,555 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)] === [2024-06-21 20:38:12,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:12,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1740222124, now seen corresponding path program 1 times [2024-06-21 20:38:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:12,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741997659] [2024-06-21 20:38:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:12,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:13,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:13,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741997659] [2024-06-21 20:38:13,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741997659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:13,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:13,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:13,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512721219] [2024-06-21 20:38:13,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:13,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:13,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:13,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:13,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:13,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:13,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:13,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:13,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:13,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:13,945 INFO L124 PetriNetUnfolderBase]: 1914/2902 cut-off events. [2024-06-21 20:38:13,945 INFO L125 PetriNetUnfolderBase]: For 32075/32078 co-relation queries the response was YES. [2024-06-21 20:38:13,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13939 conditions, 2902 events. 1914/2902 cut-off events. For 32075/32078 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14412 event pairs, 696 based on Foata normal form. 2/2900 useless extension candidates. Maximal degree in co-relation 13906. Up to 2677 conditions per place. [2024-06-21 20:38:13,957 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 74 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-21 20:38:13,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 115 transitions, 1024 flow [2024-06-21 20:38:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 20:38:13,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-21 20:38:13,959 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 644 flow. Second operand 7 states and 146 transitions. [2024-06-21 20:38:13,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 115 transitions, 1024 flow [2024-06-21 20:38:13,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 975 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:13,975 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 713 flow [2024-06-21 20:38:13,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=713, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-21 20:38:13,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-21 20:38:13,976 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 713 flow [2024-06-21 20:38:13,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:13,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:13,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:13,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:38:13,976 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)] === [2024-06-21 20:38:13,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:13,977 INFO L85 PathProgramCache]: Analyzing trace with hash -26630006, now seen corresponding path program 2 times [2024-06-21 20:38:13,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:13,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195496511] [2024-06-21 20:38:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:13,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:14,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195496511] [2024-06-21 20:38:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195496511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:14,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:14,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301326252] [2024-06-21 20:38:14,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:14,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:14,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:14,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 713 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:14,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:14,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:14,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:15,326 INFO L124 PetriNetUnfolderBase]: 1925/2923 cut-off events. [2024-06-21 20:38:15,326 INFO L125 PetriNetUnfolderBase]: For 36178/36181 co-relation queries the response was YES. [2024-06-21 20:38:15,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14340 conditions, 2923 events. 1925/2923 cut-off events. For 36178/36181 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14551 event pairs, 696 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 14305. Up to 2689 conditions per place. [2024-06-21 20:38:15,342 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-21 20:38:15,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 115 transitions, 1095 flow [2024-06-21 20:38:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 20:38:15,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-21 20:38:15,344 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 713 flow. Second operand 7 states and 142 transitions. [2024-06-21 20:38:15,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 115 transitions, 1095 flow [2024-06-21 20:38:15,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 975 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:15,365 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 718 flow [2024-06-21 20:38:15,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=718, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2024-06-21 20:38:15,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 20:38:15,365 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 718 flow [2024-06-21 20:38:15,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:15,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:15,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:15,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:38:15,366 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)] === [2024-06-21 20:38:15,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1897444975, now seen corresponding path program 2 times [2024-06-21 20:38:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:15,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498370760] [2024-06-21 20:38:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:16,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:16,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498370760] [2024-06-21 20:38:16,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498370760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:16,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:16,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:16,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840006703] [2024-06-21 20:38:16,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:16,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:16,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:16,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:16,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 718 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) [2024-06-21 20:38:16,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:16,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:16,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:16,897 INFO L124 PetriNetUnfolderBase]: 1947/2944 cut-off events. [2024-06-21 20:38:16,898 INFO L125 PetriNetUnfolderBase]: For 40476/40482 co-relation queries the response was YES. [2024-06-21 20:38:16,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14696 conditions, 2944 events. 1947/2944 cut-off events. For 40476/40482 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14597 event pairs, 662 based on Foata normal form. 5/2936 useless extension candidates. Maximal degree in co-relation 14661. Up to 2545 conditions per place. [2024-06-21 20:38:16,912 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 70 selfloop transitions, 52 changer transitions 0/127 dead transitions. [2024-06-21 20:38:16,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 127 transitions, 1226 flow [2024-06-21 20:38:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:38:16,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-21 20:38:16,914 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 718 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:38:16,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 127 transitions, 1226 flow [2024-06-21 20:38:16,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1160 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:16,934 INFO L231 Difference]: Finished difference. Result has 88 places, 97 transitions, 834 flow [2024-06-21 20:38:16,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=834, PETRI_PLACES=88, PETRI_TRANSITIONS=97} [2024-06-21 20:38:16,935 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-21 20:38:16,935 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 97 transitions, 834 flow [2024-06-21 20:38:16,935 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) [2024-06-21 20:38:16,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:16,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:16,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:38:16,936 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)] === [2024-06-21 20:38:16,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1252182511, now seen corresponding path program 3 times [2024-06-21 20:38:16,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:16,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301298625] [2024-06-21 20:38:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:17,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:17,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301298625] [2024-06-21 20:38:17,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301298625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:17,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:17,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:17,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784885628] [2024-06-21 20:38:17,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:17,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:17,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:17,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:17,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:17,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:17,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 97 transitions, 834 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) [2024-06-21 20:38:17,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:17,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:17,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:18,425 INFO L124 PetriNetUnfolderBase]: 1969/2978 cut-off events. [2024-06-21 20:38:18,426 INFO L125 PetriNetUnfolderBase]: For 45938/45944 co-relation queries the response was YES. [2024-06-21 20:38:18,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15413 conditions, 2978 events. 1969/2978 cut-off events. For 45938/45944 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14827 event pairs, 660 based on Foata normal form. 5/2968 useless extension candidates. Maximal degree in co-relation 15377. Up to 2554 conditions per place. [2024-06-21 20:38:18,473 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 74 selfloop transitions, 52 changer transitions 0/131 dead transitions. [2024-06-21 20:38:18,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 1332 flow [2024-06-21 20:38:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 20:38:18,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-21 20:38:18,475 INFO L175 Difference]: Start difference. First operand has 88 places, 97 transitions, 834 flow. Second operand 8 states and 167 transitions. [2024-06-21 20:38:18,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 1332 flow [2024-06-21 20:38:18,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 131 transitions, 1238 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:18,498 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 892 flow [2024-06-21 20:38:18,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=892, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2024-06-21 20:38:18,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-21 20:38:18,498 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 892 flow [2024-06-21 20:38:18,498 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) [2024-06-21 20:38:18,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:18,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:18,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:38:18,499 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)] === [2024-06-21 20:38:18,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1116836278, now seen corresponding path program 3 times [2024-06-21 20:38:18,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:18,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929047053] [2024-06-21 20:38:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:18,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:19,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929047053] [2024-06-21 20:38:19,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929047053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:19,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:19,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:19,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262907008] [2024-06-21 20:38:19,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:19,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:19,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:19,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:19,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:19,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:19,890 INFO L124 PetriNetUnfolderBase]: 1964/2985 cut-off events. [2024-06-21 20:38:19,890 INFO L125 PetriNetUnfolderBase]: For 49622/49631 co-relation queries the response was YES. [2024-06-21 20:38:19,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15505 conditions, 2985 events. 1964/2985 cut-off events. For 49622/49631 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14902 event pairs, 717 based on Foata normal form. 5/2981 useless extension candidates. Maximal degree in co-relation 15467. Up to 2748 conditions per place. [2024-06-21 20:38:19,905 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 80 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2024-06-21 20:38:19,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 119 transitions, 1168 flow [2024-06-21 20:38:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:38:19,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:38:19,907 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 892 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:38:19,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 119 transitions, 1168 flow [2024-06-21 20:38:19,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 1052 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:19,933 INFO L231 Difference]: Finished difference. Result has 94 places, 100 transitions, 852 flow [2024-06-21 20:38:19,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=852, PETRI_PLACES=94, PETRI_TRANSITIONS=100} [2024-06-21 20:38:19,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-21 20:38:19,934 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 100 transitions, 852 flow [2024-06-21 20:38:19,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:19,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:19,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:19,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:38:19,935 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)] === [2024-06-21 20:38:19,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1897178065, now seen corresponding path program 4 times [2024-06-21 20:38:19,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:19,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283458133] [2024-06-21 20:38:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:19,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:20,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:20,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283458133] [2024-06-21 20:38:20,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283458133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:20,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:20,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176988676] [2024-06-21 20:38:20,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:20,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:20,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 100 transitions, 852 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) [2024-06-21 20:38:20,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:20,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:20,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:21,447 INFO L124 PetriNetUnfolderBase]: 1954/2960 cut-off events. [2024-06-21 20:38:21,448 INFO L125 PetriNetUnfolderBase]: For 53330/53336 co-relation queries the response was YES. [2024-06-21 20:38:21,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15443 conditions, 2960 events. 1954/2960 cut-off events. For 53330/53336 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14739 event pairs, 660 based on Foata normal form. 5/2952 useless extension candidates. Maximal degree in co-relation 15404. Up to 2547 conditions per place. [2024-06-21 20:38:21,461 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 71 selfloop transitions, 53 changer transitions 0/129 dead transitions. [2024-06-21 20:38:21,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1244 flow [2024-06-21 20:38:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:38:21,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 20:38:21,462 INFO L175 Difference]: Start difference. First operand has 94 places, 100 transitions, 852 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:38:21,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1244 flow [2024-06-21 20:38:21,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1125 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:21,493 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 847 flow [2024-06-21 20:38:21,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=847, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-06-21 20:38:21,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-21 20:38:21,494 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 847 flow [2024-06-21 20:38:21,494 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) [2024-06-21 20:38:21,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:21,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:21,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:38:21,494 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:21,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1168597567, now seen corresponding path program 1 times [2024-06-21 20:38:21,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:21,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889929821] [2024-06-21 20:38:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:21,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:22,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889929821] [2024-06-21 20:38:22,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889929821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:22,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:22,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085917275] [2024-06-21 20:38:22,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:22,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:22,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:22,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 847 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 20:38:22,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:22,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:22,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:22,805 INFO L124 PetriNetUnfolderBase]: 1612/2607 cut-off events. [2024-06-21 20:38:22,805 INFO L125 PetriNetUnfolderBase]: For 48359/48359 co-relation queries the response was YES. [2024-06-21 20:38:22,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13562 conditions, 2607 events. 1612/2607 cut-off events. For 48359/48359 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13713 event pairs, 545 based on Foata normal form. 2/2606 useless extension candidates. Maximal degree in co-relation 13522. Up to 2358 conditions per place. [2024-06-21 20:38:22,818 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 88 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-21 20:38:22,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 113 transitions, 1095 flow [2024-06-21 20:38:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 20:38:22,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:38:22,819 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 847 flow. Second operand 6 states and 118 transitions. [2024-06-21 20:38:22,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 113 transitions, 1095 flow [2024-06-21 20:38:22,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 962 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:22,850 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 774 flow [2024-06-21 20:38:22,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=774, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-21 20:38:22,850 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 20:38:22,851 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 774 flow [2024-06-21 20:38:22,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 20:38:22,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:22,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:38:22,851 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)] === [2024-06-21 20:38:22,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1021438675, now seen corresponding path program 1 times [2024-06-21 20:38:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:22,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795777214] [2024-06-21 20:38:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795777214] [2024-06-21 20:38:23,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795777214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:23,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:23,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808431074] [2024-06-21 20:38:23,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:23,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:23,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:23,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:23,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 774 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:23,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:23,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:23,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:24,130 INFO L124 PetriNetUnfolderBase]: 1859/2879 cut-off events. [2024-06-21 20:38:24,130 INFO L125 PetriNetUnfolderBase]: For 60730/60733 co-relation queries the response was YES. [2024-06-21 20:38:24,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15574 conditions, 2879 events. 1859/2879 cut-off events. For 60730/60733 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14760 event pairs, 444 based on Foata normal form. 6/2881 useless extension candidates. Maximal degree in co-relation 15533. Up to 2550 conditions per place. [2024-06-21 20:38:24,145 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-21 20:38:24,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 1206 flow [2024-06-21 20:38:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 20:38:24,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-21 20:38:24,146 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 774 flow. Second operand 7 states and 146 transitions. [2024-06-21 20:38:24,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 1206 flow [2024-06-21 20:38:24,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1168 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:24,202 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 841 flow [2024-06-21 20:38:24,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=841, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-21 20:38:24,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-21 20:38:24,202 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 841 flow [2024-06-21 20:38:24,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:24,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:24,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:24,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:38:24,203 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:24,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1024117075, now seen corresponding path program 2 times [2024-06-21 20:38:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:24,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174294087] [2024-06-21 20:38:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:24,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174294087] [2024-06-21 20:38:24,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174294087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:24,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:24,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584357541] [2024-06-21 20:38:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:24,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:24,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:24,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:24,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:24,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:24,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:24,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:25,539 INFO L124 PetriNetUnfolderBase]: 1851/2867 cut-off events. [2024-06-21 20:38:25,540 INFO L125 PetriNetUnfolderBase]: For 65529/65532 co-relation queries the response was YES. [2024-06-21 20:38:25,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15876 conditions, 2867 events. 1851/2867 cut-off events. For 65529/65532 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14713 event pairs, 603 based on Foata normal form. 6/2869 useless extension candidates. Maximal degree in co-relation 15834. Up to 2615 conditions per place. [2024-06-21 20:38:25,554 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 96 selfloop transitions, 21 changer transitions 0/130 dead transitions. [2024-06-21 20:38:25,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1133 flow [2024-06-21 20:38:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 20:38:25,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-21 20:38:25,555 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 841 flow. Second operand 7 states and 144 transitions. [2024-06-21 20:38:25,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1133 flow [2024-06-21 20:38:25,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1078 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:38:25,596 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 835 flow [2024-06-21 20:38:25,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2024-06-21 20:38:25,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-21 20:38:25,597 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 835 flow [2024-06-21 20:38:25,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:25,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:25,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:38:25,598 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)] === [2024-06-21 20:38:25,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash -906024435, now seen corresponding path program 1 times [2024-06-21 20:38:25,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:25,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691437032] [2024-06-21 20:38:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:25,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:26,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:26,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691437032] [2024-06-21 20:38:26,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691437032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:26,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:26,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497897973] [2024-06-21 20:38:26,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:26,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:26,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:26,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:26,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 835 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:26,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:26,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:26,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:27,081 INFO L124 PetriNetUnfolderBase]: 1976/3011 cut-off events. [2024-06-21 20:38:27,081 INFO L125 PetriNetUnfolderBase]: For 71496/71499 co-relation queries the response was YES. [2024-06-21 20:38:27,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16732 conditions, 3011 events. 1976/3011 cut-off events. For 71496/71499 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15130 event pairs, 591 based on Foata normal form. 4/3011 useless extension candidates. Maximal degree in co-relation 16688. Up to 2569 conditions per place. [2024-06-21 20:38:27,098 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 85 selfloop transitions, 55 changer transitions 0/145 dead transitions. [2024-06-21 20:38:27,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1327 flow [2024-06-21 20:38:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 20:38:27,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-21 20:38:27,100 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 835 flow. Second operand 8 states and 170 transitions. [2024-06-21 20:38:27,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1327 flow [2024-06-21 20:38:27,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 1277 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:27,139 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 941 flow [2024-06-21 20:38:27,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-21 20:38:27,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 20:38:27,140 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 941 flow [2024-06-21 20:38:27,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:27,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:27,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:27,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:38:27,140 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)] === [2024-06-21 20:38:27,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash -905851455, now seen corresponding path program 2 times [2024-06-21 20:38:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954578836] [2024-06-21 20:38:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:27,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:27,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:27,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954578836] [2024-06-21 20:38:27,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954578836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:27,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:27,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:27,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724108298] [2024-06-21 20:38:27,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:27,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:27,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:27,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:27,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 941 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:27,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:27,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:27,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:28,759 INFO L124 PetriNetUnfolderBase]: 2030/3109 cut-off events. [2024-06-21 20:38:28,759 INFO L125 PetriNetUnfolderBase]: For 79190/79193 co-relation queries the response was YES. [2024-06-21 20:38:28,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17706 conditions, 3109 events. 2030/3109 cut-off events. For 79190/79193 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15840 event pairs, 589 based on Foata normal form. 4/3109 useless extension candidates. Maximal degree in co-relation 17661. Up to 2615 conditions per place. [2024-06-21 20:38:28,774 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 56 changer transitions 0/151 dead transitions. [2024-06-21 20:38:28,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 1589 flow [2024-06-21 20:38:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 20:38:28,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-21 20:38:28,775 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 941 flow. Second operand 8 states and 170 transitions. [2024-06-21 20:38:28,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 1589 flow [2024-06-21 20:38:28,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 151 transitions, 1404 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:28,815 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 964 flow [2024-06-21 20:38:28,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=964, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-21 20:38:28,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-21 20:38:28,815 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 964 flow [2024-06-21 20:38:28,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:28,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:28,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:28,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:38:28,816 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)] === [2024-06-21 20:38:28,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1887869379, now seen corresponding path program 3 times [2024-06-21 20:38:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:28,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168973135] [2024-06-21 20:38:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:29,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:29,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168973135] [2024-06-21 20:38:29,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168973135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:29,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:29,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:29,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931428005] [2024-06-21 20:38:29,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:29,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:29,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:29,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:29,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:29,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 964 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:29,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:29,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:29,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:30,310 INFO L124 PetriNetUnfolderBase]: 2020/3095 cut-off events. [2024-06-21 20:38:30,310 INFO L125 PetriNetUnfolderBase]: For 83122/83125 co-relation queries the response was YES. [2024-06-21 20:38:30,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17678 conditions, 3095 events. 2020/3095 cut-off events. For 83122/83125 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15729 event pairs, 589 based on Foata normal form. 4/3095 useless extension candidates. Maximal degree in co-relation 17633. Up to 2607 conditions per place. [2024-06-21 20:38:30,328 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 86 selfloop transitions, 57 changer transitions 0/148 dead transitions. [2024-06-21 20:38:30,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1424 flow [2024-06-21 20:38:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:38:30,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-21 20:38:30,330 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 964 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:38:30,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1424 flow [2024-06-21 20:38:30,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1313 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:30,376 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 976 flow [2024-06-21 20:38:30,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=976, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2024-06-21 20:38:30,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-21 20:38:30,377 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 976 flow [2024-06-21 20:38:30,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:30,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:30,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:30,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:38:30,377 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:30,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1140374768, now seen corresponding path program 1 times [2024-06-21 20:38:30,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:30,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708819055] [2024-06-21 20:38:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:30,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:31,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:31,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708819055] [2024-06-21 20:38:31,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708819055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:31,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:31,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:31,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001435715] [2024-06-21 20:38:31,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:31,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:31,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:31,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:31,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:31,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 976 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:31,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:31,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:31,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:31,525 INFO L124 PetriNetUnfolderBase]: 1918/2990 cut-off events. [2024-06-21 20:38:31,526 INFO L125 PetriNetUnfolderBase]: For 88328/88328 co-relation queries the response was YES. [2024-06-21 20:38:31,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17510 conditions, 2990 events. 1918/2990 cut-off events. For 88328/88328 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15561 event pairs, 608 based on Foata normal form. 1/2988 useless extension candidates. Maximal degree in co-relation 17464. Up to 2794 conditions per place. [2024-06-21 20:38:31,543 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 110 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2024-06-21 20:38:31,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 134 transitions, 1284 flow [2024-06-21 20:38:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 20:38:31,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:38:31,544 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 976 flow. Second operand 6 states and 118 transitions. [2024-06-21 20:38:31,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 134 transitions, 1284 flow [2024-06-21 20:38:31,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 134 transitions, 1161 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:31,605 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 915 flow [2024-06-21 20:38:31,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2024-06-21 20:38:31,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-21 20:38:31,606 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 915 flow [2024-06-21 20:38:31,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:31,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:31,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:31,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:38:31,607 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)] === [2024-06-21 20:38:31,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash 169439595, now seen corresponding path program 4 times [2024-06-21 20:38:31,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:31,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244928393] [2024-06-21 20:38:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:31,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:32,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244928393] [2024-06-21 20:38:32,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244928393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:32,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:32,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207930429] [2024-06-21 20:38:32,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:32,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:32,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:32,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:32,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 915 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:32,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:32,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:32,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:33,104 INFO L124 PetriNetUnfolderBase]: 2047/3144 cut-off events. [2024-06-21 20:38:33,104 INFO L125 PetriNetUnfolderBase]: For 95191/95200 co-relation queries the response was YES. [2024-06-21 20:38:33,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18378 conditions, 3144 events. 2047/3144 cut-off events. For 95191/95200 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16074 event pairs, 618 based on Foata normal form. 7/3142 useless extension candidates. Maximal degree in co-relation 18331. Up to 2633 conditions per place. [2024-06-21 20:38:33,123 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 85 selfloop transitions, 60 changer transitions 0/150 dead transitions. [2024-06-21 20:38:33,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 150 transitions, 1413 flow [2024-06-21 20:38:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:38:33,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:38:33,125 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 915 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:38:33,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 150 transitions, 1413 flow [2024-06-21 20:38:33,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 150 transitions, 1373 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:33,163 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 1041 flow [2024-06-21 20:38:33,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1041, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-06-21 20:38:33,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-21 20:38:33,164 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 1041 flow [2024-06-21 20:38:33,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:33,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:33,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:33,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:38:33,164 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)] === [2024-06-21 20:38:33,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1317021461, now seen corresponding path program 5 times [2024-06-21 20:38:33,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:33,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056221264] [2024-06-21 20:38:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056221264] [2024-06-21 20:38:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056221264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:33,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:33,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115603205] [2024-06-21 20:38:33,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:33,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:33,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 1041 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:33,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:33,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:33,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:34,672 INFO L124 PetriNetUnfolderBase]: 2069/3181 cut-off events. [2024-06-21 20:38:34,672 INFO L125 PetriNetUnfolderBase]: For 102750/102759 co-relation queries the response was YES. [2024-06-21 20:38:34,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19089 conditions, 3181 events. 2069/3181 cut-off events. For 102750/102759 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16310 event pairs, 613 based on Foata normal form. 7/3179 useless extension candidates. Maximal degree in co-relation 19041. Up to 2652 conditions per place. [2024-06-21 20:38:34,695 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 59 changer transitions 0/154 dead transitions. [2024-06-21 20:38:34,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 154 transitions, 1559 flow [2024-06-21 20:38:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 20:38:34,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-21 20:38:34,697 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 1041 flow. Second operand 8 states and 163 transitions. [2024-06-21 20:38:34,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 154 transitions, 1559 flow [2024-06-21 20:38:34,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 154 transitions, 1433 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:34,743 INFO L231 Difference]: Finished difference. Result has 113 places, 125 transitions, 1085 flow [2024-06-21 20:38:34,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1085, PETRI_PLACES=113, PETRI_TRANSITIONS=125} [2024-06-21 20:38:34,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 20:38:34,744 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 125 transitions, 1085 flow [2024-06-21 20:38:34,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:34,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:34,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:34,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:38:34,745 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)] === [2024-06-21 20:38:34,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1317027971, now seen corresponding path program 6 times [2024-06-21 20:38:34,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:34,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806291567] [2024-06-21 20:38:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:34,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:35,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:35,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806291567] [2024-06-21 20:38:35,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806291567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:35,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:35,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:35,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358843922] [2024-06-21 20:38:35,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:35,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:35,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:35,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:35,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:35,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:35,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 125 transitions, 1085 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:35,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:35,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:35,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:36,314 INFO L124 PetriNetUnfolderBase]: 2059/3167 cut-off events. [2024-06-21 20:38:36,314 INFO L125 PetriNetUnfolderBase]: For 108026/108035 co-relation queries the response was YES. [2024-06-21 20:38:36,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19081 conditions, 3167 events. 2059/3167 cut-off events. For 108026/108035 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16169 event pairs, 611 based on Foata normal form. 7/3165 useless extension candidates. Maximal degree in co-relation 19032. Up to 2644 conditions per place. [2024-06-21 20:38:36,333 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 60 changer transitions 0/152 dead transitions. [2024-06-21 20:38:36,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1445 flow [2024-06-21 20:38:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:38:36,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:38:36,334 INFO L175 Difference]: Start difference. First operand has 113 places, 125 transitions, 1085 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:38:36,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1445 flow [2024-06-21 20:38:36,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 152 transitions, 1254 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:36,379 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 1022 flow [2024-06-21 20:38:36,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1022, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2024-06-21 20:38:36,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-21 20:38:36,380 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 1022 flow [2024-06-21 20:38:36,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:36,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:36,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:38:36,380 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:36,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1342382994, now seen corresponding path program 2 times [2024-06-21 20:38:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:36,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516881281] [2024-06-21 20:38:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:37,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:37,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516881281] [2024-06-21 20:38:37,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516881281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:37,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:37,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335896050] [2024-06-21 20:38:37,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:37,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:37,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:37,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:37,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 1022 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:37,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:37,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:37,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:37,608 INFO L124 PetriNetUnfolderBase]: 1945/3049 cut-off events. [2024-06-21 20:38:37,608 INFO L125 PetriNetUnfolderBase]: For 112260/112269 co-relation queries the response was YES. [2024-06-21 20:38:37,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18744 conditions, 3049 events. 1945/3049 cut-off events. For 112260/112269 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15973 event pairs, 618 based on Foata normal form. 7/3051 useless extension candidates. Maximal degree in co-relation 18694. Up to 2830 conditions per place. [2024-06-21 20:38:37,630 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 108 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2024-06-21 20:38:37,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 137 transitions, 1326 flow [2024-06-21 20:38:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 20:38:37,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:38:37,631 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 1022 flow. Second operand 6 states and 114 transitions. [2024-06-21 20:38:37,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 137 transitions, 1326 flow [2024-06-21 20:38:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 1169 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:37,686 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 943 flow [2024-06-21 20:38:37,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2024-06-21 20:38:37,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 20:38:37,686 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 943 flow [2024-06-21 20:38:37,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:37,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:37,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:37,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:38:37,687 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:37,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1146094640, now seen corresponding path program 1 times [2024-06-21 20:38:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:37,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300854665] [2024-06-21 20:38:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:37,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:38,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:38,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300854665] [2024-06-21 20:38:38,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300854665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:38,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:38,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:38,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930581318] [2024-06-21 20:38:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:38,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:38,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:38,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:38,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 943 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 20:38:38,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:38,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:38,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:38,767 INFO L124 PetriNetUnfolderBase]: 1721/2807 cut-off events. [2024-06-21 20:38:38,767 INFO L125 PetriNetUnfolderBase]: For 100285/100285 co-relation queries the response was YES. [2024-06-21 20:38:38,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16854 conditions, 2807 events. 1721/2807 cut-off events. For 100285/100285 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15190 event pairs, 519 based on Foata normal form. 1/2805 useless extension candidates. Maximal degree in co-relation 16803. Up to 2519 conditions per place. [2024-06-21 20:38:38,783 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 118 selfloop transitions, 11 changer transitions 0/143 dead transitions. [2024-06-21 20:38:38,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 143 transitions, 1261 flow [2024-06-21 20:38:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 20:38:38,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:38:38,784 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 943 flow. Second operand 6 states and 120 transitions. [2024-06-21 20:38:38,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 143 transitions, 1261 flow [2024-06-21 20:38:38,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 1205 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:38,842 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 951 flow [2024-06-21 20:38:38,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=951, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-21 20:38:38,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-21 20:38:38,843 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 951 flow [2024-06-21 20:38:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 20:38:38,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:38,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:38,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:38:38,844 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)] === [2024-06-21 20:38:38,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:38,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1537710716, now seen corresponding path program 2 times [2024-06-21 20:38:38,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:38,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031049909] [2024-06-21 20:38:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:38,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:39,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031049909] [2024-06-21 20:38:39,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031049909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:39,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:39,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:38:39,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014460649] [2024-06-21 20:38:39,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:39,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:38:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:39,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:38:39,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:38:39,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:38:39,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 951 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 20:38:39,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:39,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:38:39,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:39,958 INFO L124 PetriNetUnfolderBase]: 1718/2804 cut-off events. [2024-06-21 20:38:39,958 INFO L125 PetriNetUnfolderBase]: For 105541/105544 co-relation queries the response was YES. [2024-06-21 20:38:39,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17245 conditions, 2804 events. 1718/2804 cut-off events. For 105541/105544 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15204 event pairs, 523 based on Foata normal form. 3/2803 useless extension candidates. Maximal degree in co-relation 17193. Up to 2509 conditions per place. [2024-06-21 20:38:39,974 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 113 selfloop transitions, 16 changer transitions 0/143 dead transitions. [2024-06-21 20:38:39,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 143 transitions, 1267 flow [2024-06-21 20:38:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:38:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:38:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 20:38:39,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 20:38:39,975 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 951 flow. Second operand 6 states and 119 transitions. [2024-06-21 20:38:39,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 143 transitions, 1267 flow [2024-06-21 20:38:40,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 143 transitions, 1225 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:40,025 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 989 flow [2024-06-21 20:38:40,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=989, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2024-06-21 20:38:40,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-21 20:38:40,025 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 989 flow [2024-06-21 20:38:40,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-21 20:38:40,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:40,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:40,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:38:40,026 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:40,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1308439421, now seen corresponding path program 1 times [2024-06-21 20:38:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:40,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787854040] [2024-06-21 20:38:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:40,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:41,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:41,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787854040] [2024-06-21 20:38:41,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787854040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:41,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:41,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:41,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133127722] [2024-06-21 20:38:41,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:41,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:41,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:41,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:41,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:41,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:41,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 989 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:41,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:41,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:41,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:41,806 INFO L124 PetriNetUnfolderBase]: 1809/2888 cut-off events. [2024-06-21 20:38:41,806 INFO L125 PetriNetUnfolderBase]: For 111060/111060 co-relation queries the response was YES. [2024-06-21 20:38:41,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17902 conditions, 2888 events. 1809/2888 cut-off events. For 111060/111060 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15207 event pairs, 504 based on Foata normal form. 4/2889 useless extension candidates. Maximal degree in co-relation 17849. Up to 2635 conditions per place. [2024-06-21 20:38:41,825 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 142 selfloop transitions, 19 changer transitions 0/167 dead transitions. [2024-06-21 20:38:41,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 167 transitions, 1433 flow [2024-06-21 20:38:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:38:41,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:38:41,826 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 989 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:38:41,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 167 transitions, 1433 flow [2024-06-21 20:38:41,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 167 transitions, 1375 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:41,887 INFO L231 Difference]: Finished difference. Result has 122 places, 139 transitions, 1038 flow [2024-06-21 20:38:41,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1038, PETRI_PLACES=122, PETRI_TRANSITIONS=139} [2024-06-21 20:38:41,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-21 20:38:41,887 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 139 transitions, 1038 flow [2024-06-21 20:38:41,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:41,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:41,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:41,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:38:41,888 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:41,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash 543383211, now seen corresponding path program 1 times [2024-06-21 20:38:41,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:41,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97254855] [2024-06-21 20:38:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:41,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97254855] [2024-06-21 20:38:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97254855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:42,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:42,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052387030] [2024-06-21 20:38:42,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:42,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:42,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:42,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 139 transitions, 1038 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:42,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:42,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:42,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:43,295 INFO L124 PetriNetUnfolderBase]: 2067/3177 cut-off events. [2024-06-21 20:38:43,295 INFO L125 PetriNetUnfolderBase]: For 139875/139878 co-relation queries the response was YES. [2024-06-21 20:38:43,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20898 conditions, 3177 events. 2067/3177 cut-off events. For 139875/139878 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16158 event pairs, 415 based on Foata normal form. 4/3177 useless extension candidates. Maximal degree in co-relation 20843. Up to 2733 conditions per place. [2024-06-21 20:38:43,315 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 129 selfloop transitions, 40 changer transitions 0/174 dead transitions. [2024-06-21 20:38:43,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 174 transitions, 1632 flow [2024-06-21 20:38:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:38:43,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:38:43,316 INFO L175 Difference]: Start difference. First operand has 122 places, 139 transitions, 1038 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:38:43,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 174 transitions, 1632 flow [2024-06-21 20:38:43,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 174 transitions, 1565 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:43,379 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1118 flow [2024-06-21 20:38:43,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1118, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-21 20:38:43,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 20:38:43,379 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1118 flow [2024-06-21 20:38:43,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:43,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:43,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:43,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:38:43,380 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)] === [2024-06-21 20:38:43,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:43,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1596017719, now seen corresponding path program 2 times [2024-06-21 20:38:43,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:43,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547339701] [2024-06-21 20:38:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:43,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:44,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547339701] [2024-06-21 20:38:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547339701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:44,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:44,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833516195] [2024-06-21 20:38:44,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:44,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:44,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1118 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:44,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:44,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:44,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:44,901 INFO L124 PetriNetUnfolderBase]: 2084/3204 cut-off events. [2024-06-21 20:38:44,901 INFO L125 PetriNetUnfolderBase]: For 148333/148336 co-relation queries the response was YES. [2024-06-21 20:38:44,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21418 conditions, 3204 events. 2084/3204 cut-off events. For 148333/148336 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16354 event pairs, 584 based on Foata normal form. 4/3204 useless extension candidates. Maximal degree in co-relation 21362. Up to 2913 conditions per place. [2024-06-21 20:38:44,922 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-06-21 20:38:44,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 172 transitions, 1552 flow [2024-06-21 20:38:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:38:44,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 20:38:44,923 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1118 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:38:44,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 172 transitions, 1552 flow [2024-06-21 20:38:44,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 172 transitions, 1474 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:44,994 INFO L231 Difference]: Finished difference. Result has 128 places, 145 transitions, 1159 flow [2024-06-21 20:38:44,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1159, PETRI_PLACES=128, PETRI_TRANSITIONS=145} [2024-06-21 20:38:44,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-21 20:38:44,994 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 145 transitions, 1159 flow [2024-06-21 20:38:44,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:44,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:44,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:38:44,995 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)] === [2024-06-21 20:38:44,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1596165589, now seen corresponding path program 3 times [2024-06-21 20:38:44,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:44,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076738204] [2024-06-21 20:38:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:44,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:45,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:45,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076738204] [2024-06-21 20:38:45,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076738204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:45,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:45,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:45,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545227157] [2024-06-21 20:38:45,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:45,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:45,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:45,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:45,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:45,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 145 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:45,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:45,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:45,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:46,412 INFO L124 PetriNetUnfolderBase]: 2101/3231 cut-off events. [2024-06-21 20:38:46,413 INFO L125 PetriNetUnfolderBase]: For 156706/156709 co-relation queries the response was YES. [2024-06-21 20:38:46,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21840 conditions, 3231 events. 2101/3231 cut-off events. For 156706/156709 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16478 event pairs, 584 based on Foata normal form. 4/3231 useless extension candidates. Maximal degree in co-relation 21782. Up to 2899 conditions per place. [2024-06-21 20:38:46,435 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 41 changer transitions 0/175 dead transitions. [2024-06-21 20:38:46,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 175 transitions, 1597 flow [2024-06-21 20:38:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:38:46,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 20:38:46,436 INFO L175 Difference]: Start difference. First operand has 128 places, 145 transitions, 1159 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:38:46,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 175 transitions, 1597 flow [2024-06-21 20:38:46,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1508 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:46,510 INFO L231 Difference]: Finished difference. Result has 130 places, 147 transitions, 1191 flow [2024-06-21 20:38:46,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1191, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2024-06-21 20:38:46,511 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-21 20:38:46,511 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1191 flow [2024-06-21 20:38:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:46,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:46,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:46,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:38:46,512 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:46,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 991521938, now seen corresponding path program 1 times [2024-06-21 20:38:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:46,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251091284] [2024-06-21 20:38:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:47,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251091284] [2024-06-21 20:38:47,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251091284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:47,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:47,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:47,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504191839] [2024-06-21 20:38:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:47,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:47,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:47,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:47,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1191 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:38:47,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:47,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:47,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:47,837 INFO L124 PetriNetUnfolderBase]: 2001/3137 cut-off events. [2024-06-21 20:38:47,837 INFO L125 PetriNetUnfolderBase]: For 164116/164119 co-relation queries the response was YES. [2024-06-21 20:38:47,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21636 conditions, 3137 events. 2001/3137 cut-off events. For 164116/164119 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16481 event pairs, 579 based on Foata normal form. 4/3137 useless extension candidates. Maximal degree in co-relation 21577. Up to 2824 conditions per place. [2024-06-21 20:38:47,859 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 24 changer transitions 0/173 dead transitions. [2024-06-21 20:38:47,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 173 transitions, 1609 flow [2024-06-21 20:38:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 20:38:47,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-21 20:38:47,861 INFO L175 Difference]: Start difference. First operand has 130 places, 147 transitions, 1191 flow. Second operand 7 states and 144 transitions. [2024-06-21 20:38:47,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 173 transitions, 1609 flow [2024-06-21 20:38:47,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 173 transitions, 1510 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:47,924 INFO L231 Difference]: Finished difference. Result has 131 places, 151 transitions, 1205 flow [2024-06-21 20:38:47,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1205, PETRI_PLACES=131, PETRI_TRANSITIONS=151} [2024-06-21 20:38:47,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-21 20:38:47,925 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 151 transitions, 1205 flow [2024-06-21 20:38:47,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:38:47,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:47,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:47,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:38:47,925 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)] === [2024-06-21 20:38:47,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:47,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1977860681, now seen corresponding path program 4 times [2024-06-21 20:38:47,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:47,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543910019] [2024-06-21 20:38:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:47,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:48,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:48,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543910019] [2024-06-21 20:38:48,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543910019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:48,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:48,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446419348] [2024-06-21 20:38:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:48,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:48,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:48,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 151 transitions, 1205 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:48,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:48,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:48,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:49,464 INFO L124 PetriNetUnfolderBase]: 2128/3274 cut-off events. [2024-06-21 20:38:49,464 INFO L125 PetriNetUnfolderBase]: For 173748/173751 co-relation queries the response was YES. [2024-06-21 20:38:49,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22822 conditions, 3274 events. 2128/3274 cut-off events. For 173748/173751 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16675 event pairs, 419 based on Foata normal form. 4/3274 useless extension candidates. Maximal degree in co-relation 22762. Up to 2894 conditions per place. [2024-06-21 20:38:49,488 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 136 selfloop transitions, 45 changer transitions 0/186 dead transitions. [2024-06-21 20:38:49,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 1819 flow [2024-06-21 20:38:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:38:49,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 20:38:49,489 INFO L175 Difference]: Start difference. First operand has 131 places, 151 transitions, 1205 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:38:49,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 1819 flow [2024-06-21 20:38:49,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 186 transitions, 1734 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:49,577 INFO L231 Difference]: Finished difference. Result has 134 places, 153 transitions, 1249 flow [2024-06-21 20:38:49,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1249, PETRI_PLACES=134, PETRI_TRANSITIONS=153} [2024-06-21 20:38:49,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-21 20:38:49,578 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 153 transitions, 1249 flow [2024-06-21 20:38:49,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:49,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:49,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:49,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:38:49,578 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)] === [2024-06-21 20:38:49,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:49,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1983370931, now seen corresponding path program 5 times [2024-06-21 20:38:49,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:49,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370000105] [2024-06-21 20:38:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:50,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370000105] [2024-06-21 20:38:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370000105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:50,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:50,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530670730] [2024-06-21 20:38:50,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:50,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:50,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 153 transitions, 1249 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:50,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:50,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:50,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:51,138 INFO L124 PetriNetUnfolderBase]: 2145/3301 cut-off events. [2024-06-21 20:38:51,138 INFO L125 PetriNetUnfolderBase]: For 183228/183231 co-relation queries the response was YES. [2024-06-21 20:38:51,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23288 conditions, 3301 events. 2145/3301 cut-off events. For 183228/183231 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16902 event pairs, 588 based on Foata normal form. 4/3301 useless extension candidates. Maximal degree in co-relation 23227. Up to 3008 conditions per place. [2024-06-21 20:38:51,162 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 38 changer transitions 0/182 dead transitions. [2024-06-21 20:38:51,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 182 transitions, 1707 flow [2024-06-21 20:38:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:38:51,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 20:38:51,163 INFO L175 Difference]: Start difference. First operand has 134 places, 153 transitions, 1249 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:38:51,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 182 transitions, 1707 flow [2024-06-21 20:38:51,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 182 transitions, 1584 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:51,299 INFO L231 Difference]: Finished difference. Result has 136 places, 155 transitions, 1249 flow [2024-06-21 20:38:51,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1249, PETRI_PLACES=136, PETRI_TRANSITIONS=155} [2024-06-21 20:38:51,300 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-21 20:38:51,300 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 155 transitions, 1249 flow [2024-06-21 20:38:51,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:51,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:51,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:51,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:38:51,301 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:51,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1978008551, now seen corresponding path program 6 times [2024-06-21 20:38:51,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:51,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352979638] [2024-06-21 20:38:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:51,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:52,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:52,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352979638] [2024-06-21 20:38:52,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352979638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:52,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:52,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:52,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785304824] [2024-06-21 20:38:52,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:52,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:52,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:52,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:52,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 155 transitions, 1249 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:52,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:52,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:52,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:52,889 INFO L124 PetriNetUnfolderBase]: 2162/3328 cut-off events. [2024-06-21 20:38:52,889 INFO L125 PetriNetUnfolderBase]: For 192353/192356 co-relation queries the response was YES. [2024-06-21 20:38:52,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23571 conditions, 3328 events. 2162/3328 cut-off events. For 192353/192356 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17065 event pairs, 588 based on Foata normal form. 4/3328 useless extension candidates. Maximal degree in co-relation 23509. Up to 3035 conditions per place. [2024-06-21 20:38:52,916 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 41 changer transitions 0/187 dead transitions. [2024-06-21 20:38:52,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 187 transitions, 1725 flow [2024-06-21 20:38:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:38:52,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 20:38:52,917 INFO L175 Difference]: Start difference. First operand has 136 places, 155 transitions, 1249 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:38:52,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 187 transitions, 1725 flow [2024-06-21 20:38:53,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 187 transitions, 1628 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:53,021 INFO L231 Difference]: Finished difference. Result has 138 places, 157 transitions, 1281 flow [2024-06-21 20:38:53,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1281, PETRI_PLACES=138, PETRI_TRANSITIONS=157} [2024-06-21 20:38:53,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-21 20:38:53,022 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 157 transitions, 1281 flow [2024-06-21 20:38:53,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:53,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:53,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:53,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:38:53,022 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:53,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash 49320038, now seen corresponding path program 1 times [2024-06-21 20:38:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:53,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984873271] [2024-06-21 20:38:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:53,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:53,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984873271] [2024-06-21 20:38:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984873271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364257441] [2024-06-21 20:38:53,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:54,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:54,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 157 transitions, 1281 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:38:54,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:54,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:54,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:54,591 INFO L124 PetriNetUnfolderBase]: 2042/3209 cut-off events. [2024-06-21 20:38:54,591 INFO L125 PetriNetUnfolderBase]: For 199214/199214 co-relation queries the response was YES. [2024-06-21 20:38:54,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23174 conditions, 3209 events. 2042/3209 cut-off events. For 199214/199214 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16874 event pairs, 574 based on Foata normal form. 1/3207 useless extension candidates. Maximal degree in co-relation 23111. Up to 2947 conditions per place. [2024-06-21 20:38:54,617 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 142 selfloop transitions, 14 changer transitions 0/176 dead transitions. [2024-06-21 20:38:54,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 176 transitions, 1669 flow [2024-06-21 20:38:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:38:54,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:38:54,618 INFO L175 Difference]: Start difference. First operand has 138 places, 157 transitions, 1281 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:38:54,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 176 transitions, 1669 flow [2024-06-21 20:38:54,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 176 transitions, 1562 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:54,705 INFO L231 Difference]: Finished difference. Result has 139 places, 160 transitions, 1250 flow [2024-06-21 20:38:54,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1250, PETRI_PLACES=139, PETRI_TRANSITIONS=160} [2024-06-21 20:38:54,705 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 20:38:54,705 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 160 transitions, 1250 flow [2024-06-21 20:38:54,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:38:54,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:54,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:54,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:38:54,706 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:54,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash 49319604, now seen corresponding path program 2 times [2024-06-21 20:38:54,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:54,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909924746] [2024-06-21 20:38:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:54,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:55,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:55,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909924746] [2024-06-21 20:38:55,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909924746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:55,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:55,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:55,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816451943] [2024-06-21 20:38:55,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:55,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:55,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:55,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:55,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:55,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:55,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 160 transitions, 1250 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:38:55,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:55,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:55,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:56,029 INFO L124 PetriNetUnfolderBase]: 2070/3256 cut-off events. [2024-06-21 20:38:56,029 INFO L125 PetriNetUnfolderBase]: For 209988/209991 co-relation queries the response was YES. [2024-06-21 20:38:56,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23885 conditions, 3256 events. 2070/3256 cut-off events. For 209988/209991 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17247 event pairs, 577 based on Foata normal form. 4/3256 useless extension candidates. Maximal degree in co-relation 23821. Up to 2895 conditions per place. [2024-06-21 20:38:56,053 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 29 changer transitions 0/185 dead transitions. [2024-06-21 20:38:56,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 185 transitions, 1820 flow [2024-06-21 20:38:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:38:56,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:38:56,054 INFO L175 Difference]: Start difference. First operand has 139 places, 160 transitions, 1250 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:38:56,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 185 transitions, 1820 flow [2024-06-21 20:38:56,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 185 transitions, 1766 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:56,169 INFO L231 Difference]: Finished difference. Result has 142 places, 168 transitions, 1400 flow [2024-06-21 20:38:56,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2024-06-21 20:38:56,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-21 20:38:56,170 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1400 flow [2024-06-21 20:38:56,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:38:56,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:56,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:56,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:38:56,170 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)] === [2024-06-21 20:38:56,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2121800823, now seen corresponding path program 7 times [2024-06-21 20:38:56,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:56,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516978694] [2024-06-21 20:38:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:56,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:56,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:56,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516978694] [2024-06-21 20:38:56,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516978694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:56,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:56,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898234251] [2024-06-21 20:38:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:57,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:38:57,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1400 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:57,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:57,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:38:57,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:57,768 INFO L124 PetriNetUnfolderBase]: 2187/3369 cut-off events. [2024-06-21 20:38:57,769 INFO L125 PetriNetUnfolderBase]: For 221036/221045 co-relation queries the response was YES. [2024-06-21 20:38:57,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25146 conditions, 3369 events. 2187/3369 cut-off events. For 221036/221045 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17332 event pairs, 612 based on Foata normal form. 7/3367 useless extension candidates. Maximal degree in co-relation 25080. Up to 3069 conditions per place. [2024-06-21 20:38:57,792 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 151 selfloop transitions, 36 changer transitions 0/192 dead transitions. [2024-06-21 20:38:57,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 192 transitions, 1834 flow [2024-06-21 20:38:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:38:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:38:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:38:57,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 20:38:57,794 INFO L175 Difference]: Start difference. First operand has 142 places, 168 transitions, 1400 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:38:57,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 192 transitions, 1834 flow [2024-06-21 20:38:57,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 192 transitions, 1731 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 20:38:57,920 INFO L231 Difference]: Finished difference. Result has 147 places, 168 transitions, 1376 flow [2024-06-21 20:38:57,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=147, PETRI_TRANSITIONS=168} [2024-06-21 20:38:57,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-21 20:38:57,921 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 168 transitions, 1376 flow [2024-06-21 20:38:57,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:57,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:57,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:57,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:38:57,921 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:57,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash 61356098, now seen corresponding path program 2 times [2024-06-21 20:38:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:57,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784909202] [2024-06-21 20:38:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:58,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:58,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784909202] [2024-06-21 20:38:58,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784909202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:58,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:58,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:38:58,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125320344] [2024-06-21 20:38:58,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:58,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:38:58,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:38:58,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:38:58,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:38:58,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 168 transitions, 1376 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:38:58,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:58,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:38:58,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:59,410 INFO L124 PetriNetUnfolderBase]: 2067/3252 cut-off events. [2024-06-21 20:38:59,410 INFO L125 PetriNetUnfolderBase]: For 227963/227972 co-relation queries the response was YES. [2024-06-21 20:38:59,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24798 conditions, 3252 events. 2067/3252 cut-off events. For 227963/227972 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17196 event pairs, 580 based on Foata normal form. 7/3254 useless extension candidates. Maximal degree in co-relation 24730. Up to 2969 conditions per place. [2024-06-21 20:38:59,437 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 141 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-21 20:38:59,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 187 transitions, 1924 flow [2024-06-21 20:38:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:38:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:38:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:38:59,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 20:38:59,440 INFO L175 Difference]: Start difference. First operand has 147 places, 168 transitions, 1376 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:38:59,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 187 transitions, 1924 flow [2024-06-21 20:38:59,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 187 transitions, 1830 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:59,582 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1461 flow [2024-06-21 20:38:59,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1461, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-21 20:38:59,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-21 20:38:59,583 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1461 flow [2024-06-21 20:38:59,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:38:59,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:59,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:38:59,583 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:59,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:59,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1405187302, now seen corresponding path program 3 times [2024-06-21 20:38:59,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:59,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108849600] [2024-06-21 20:38:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:00,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:00,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108849600] [2024-06-21 20:39:00,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108849600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:00,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:00,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:00,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167932112] [2024-06-21 20:39:00,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:00,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:00,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:00,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:00,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1461 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:39:00,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:00,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:00,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:01,154 INFO L124 PetriNetUnfolderBase]: 2064/3248 cut-off events. [2024-06-21 20:39:01,155 INFO L125 PetriNetUnfolderBase]: For 237716/237725 co-relation queries the response was YES. [2024-06-21 20:39:01,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25141 conditions, 3248 events. 2064/3248 cut-off events. For 237716/237725 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17199 event pairs, 580 based on Foata normal form. 7/3250 useless extension candidates. Maximal degree in co-relation 25071. Up to 2975 conditions per place. [2024-06-21 20:39:01,182 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 148 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2024-06-21 20:39:01,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 187 transitions, 1826 flow [2024-06-21 20:39:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 20:39:01,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:39:01,183 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1461 flow. Second operand 7 states and 129 transitions. [2024-06-21 20:39:01,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 187 transitions, 1826 flow [2024-06-21 20:39:01,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 187 transitions, 1736 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 20:39:01,315 INFO L231 Difference]: Finished difference. Result has 152 places, 177 transitions, 1424 flow [2024-06-21 20:39:01,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1424, PETRI_PLACES=152, PETRI_TRANSITIONS=177} [2024-06-21 20:39:01,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 20:39:01,315 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 177 transitions, 1424 flow [2024-06-21 20:39:01,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:39:01,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:01,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:01,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:39:01,316 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:01,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:01,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1405186868, now seen corresponding path program 3 times [2024-06-21 20:39:01,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:01,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787100307] [2024-06-21 20:39:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:01,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:02,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:02,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787100307] [2024-06-21 20:39:02,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787100307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:02,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:02,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:02,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826357837] [2024-06-21 20:39:02,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:02,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:02,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:02,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:02,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 1424 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:39:02,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:02,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:02,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:02,782 INFO L124 PetriNetUnfolderBase]: 2068/3254 cut-off events. [2024-06-21 20:39:02,782 INFO L125 PetriNetUnfolderBase]: For 246824/246833 co-relation queries the response was YES. [2024-06-21 20:39:02,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25337 conditions, 3254 events. 2068/3254 cut-off events. For 246824/246833 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17246 event pairs, 604 based on Foata normal form. 5/3250 useless extension candidates. Maximal degree in co-relation 25265. Up to 2865 conditions per place. [2024-06-21 20:39:02,809 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 42 changer transitions 0/197 dead transitions. [2024-06-21 20:39:02,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 197 transitions, 2124 flow [2024-06-21 20:39:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:39:02,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:39:02,810 INFO L175 Difference]: Start difference. First operand has 152 places, 177 transitions, 1424 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:39:02,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 197 transitions, 2124 flow [2024-06-21 20:39:02,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 2082 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:03,001 INFO L231 Difference]: Finished difference. Result has 155 places, 185 transitions, 1628 flow [2024-06-21 20:39:03,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1628, PETRI_PLACES=155, PETRI_TRANSITIONS=185} [2024-06-21 20:39:03,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-21 20:39:03,001 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 185 transitions, 1628 flow [2024-06-21 20:39:03,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:39:03,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:03,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:03,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:39:03,002 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:03,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:03,002 INFO L85 PathProgramCache]: Analyzing trace with hash -957960164, now seen corresponding path program 1 times [2024-06-21 20:39:03,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:03,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623643135] [2024-06-21 20:39:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:03,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:03,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623643135] [2024-06-21 20:39:03,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623643135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:03,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:03,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:03,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355024275] [2024-06-21 20:39:03,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:03,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:03,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:03,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:03,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 185 transitions, 1628 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:39:03,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:03,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:03,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:04,283 INFO L124 PetriNetUnfolderBase]: 2059/3246 cut-off events. [2024-06-21 20:39:04,283 INFO L125 PetriNetUnfolderBase]: For 259882/259882 co-relation queries the response was YES. [2024-06-21 20:39:04,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26122 conditions, 3246 events. 2059/3246 cut-off events. For 259882/259882 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17055 event pairs, 528 based on Foata normal form. 1/3244 useless extension candidates. Maximal degree in co-relation 26048. Up to 2993 conditions per place. [2024-06-21 20:39:04,310 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 180 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-06-21 20:39:04,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 204 transitions, 2102 flow [2024-06-21 20:39:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:39:04,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:39:04,311 INFO L175 Difference]: Start difference. First operand has 155 places, 185 transitions, 1628 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:39:04,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 204 transitions, 2102 flow [2024-06-21 20:39:04,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 204 transitions, 1954 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 20:39:04,511 INFO L231 Difference]: Finished difference. Result has 158 places, 188 transitions, 1566 flow [2024-06-21 20:39:04,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1566, PETRI_PLACES=158, PETRI_TRANSITIONS=188} [2024-06-21 20:39:04,511 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 20:39:04,511 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 188 transitions, 1566 flow [2024-06-21 20:39:04,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:39:04,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:04,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:04,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:39:04,512 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:04,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1169196454, now seen corresponding path program 1 times [2024-06-21 20:39:04,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:04,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962881328] [2024-06-21 20:39:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:04,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:05,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:05,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962881328] [2024-06-21 20:39:05,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962881328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:05,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:05,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:05,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903028349] [2024-06-21 20:39:05,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:05,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:05,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:05,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:39:05,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 188 transitions, 1566 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:05,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:05,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:39:05,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:05,956 INFO L124 PetriNetUnfolderBase]: 1964/3157 cut-off events. [2024-06-21 20:39:05,956 INFO L125 PetriNetUnfolderBase]: For 270853/270853 co-relation queries the response was YES. [2024-06-21 20:39:05,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25670 conditions, 3157 events. 1964/3157 cut-off events. For 270853/270853 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17060 event pairs, 522 based on Foata normal form. 3/3157 useless extension candidates. Maximal degree in co-relation 25595. Up to 2773 conditions per place. [2024-06-21 20:39:05,984 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 165 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-21 20:39:05,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 205 transitions, 2000 flow [2024-06-21 20:39:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:39:05,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 20:39:05,986 INFO L175 Difference]: Start difference. First operand has 158 places, 188 transitions, 1566 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:39:05,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 205 transitions, 2000 flow [2024-06-21 20:39:06,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 205 transitions, 1938 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:06,138 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 1586 flow [2024-06-21 20:39:06,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1586, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-21 20:39:06,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 20:39:06,139 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1586 flow [2024-06-21 20:39:06,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:06,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:06,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:39:06,139 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:06,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1169196206, now seen corresponding path program 2 times [2024-06-21 20:39:06,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:06,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730158243] [2024-06-21 20:39:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:06,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:06,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:06,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730158243] [2024-06-21 20:39:06,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730158243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:06,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:06,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:06,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500373083] [2024-06-21 20:39:06,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:06,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:06,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:07,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:07,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 1586 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:39:07,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:07,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:07,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:07,521 INFO L124 PetriNetUnfolderBase]: 2074/3269 cut-off events. [2024-06-21 20:39:07,522 INFO L125 PetriNetUnfolderBase]: For 278581/278581 co-relation queries the response was YES. [2024-06-21 20:39:07,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26753 conditions, 3269 events. 2074/3269 cut-off events. For 278581/278581 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17173 event pairs, 527 based on Foata normal form. 1/3267 useless extension candidates. Maximal degree in co-relation 26677. Up to 3008 conditions per place. [2024-06-21 20:39:07,550 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-21 20:39:07,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 207 transitions, 2064 flow [2024-06-21 20:39:07,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:39:07,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 20:39:07,551 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 1586 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:39:07,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 207 transitions, 2064 flow [2024-06-21 20:39:07,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 207 transitions, 2004 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:07,759 INFO L231 Difference]: Finished difference. Result has 162 places, 194 transitions, 1628 flow [2024-06-21 20:39:07,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1628, PETRI_PLACES=162, PETRI_TRANSITIONS=194} [2024-06-21 20:39:07,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-21 20:39:07,759 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 194 transitions, 1628 flow [2024-06-21 20:39:07,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:39:07,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:07,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:07,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:39:07,760 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)] === [2024-06-21 20:39:07,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1405371814, now seen corresponding path program 2 times [2024-06-21 20:39:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:07,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529976354] [2024-06-21 20:39:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:07,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:08,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:08,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529976354] [2024-06-21 20:39:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529976354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:08,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:08,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254069689] [2024-06-21 20:39:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:08,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:08,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:39:08,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 194 transitions, 1628 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:08,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:08,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:39:08,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:09,298 INFO L124 PetriNetUnfolderBase]: 1984/3186 cut-off events. [2024-06-21 20:39:09,298 INFO L125 PetriNetUnfolderBase]: For 291946/291949 co-relation queries the response was YES. [2024-06-21 20:39:09,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26748 conditions, 3186 events. 1984/3186 cut-off events. For 291946/291949 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17199 event pairs, 527 based on Foata normal form. 5/3187 useless extension candidates. Maximal degree in co-relation 26671. Up to 2791 conditions per place. [2024-06-21 20:39:09,326 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 162 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-21 20:39:09,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 208 transitions, 2066 flow [2024-06-21 20:39:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:39:09,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:39:09,327 INFO L175 Difference]: Start difference. First operand has 162 places, 194 transitions, 1628 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:39:09,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 208 transitions, 2066 flow [2024-06-21 20:39:09,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 208 transitions, 1986 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:09,536 INFO L231 Difference]: Finished difference. Result has 164 places, 197 transitions, 1648 flow [2024-06-21 20:39:09,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1648, PETRI_PLACES=164, PETRI_TRANSITIONS=197} [2024-06-21 20:39:09,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-21 20:39:09,536 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 197 transitions, 1648 flow [2024-06-21 20:39:09,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:09,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:09,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:09,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:39:09,537 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)] === [2024-06-21 20:39:09,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1405371566, now seen corresponding path program 3 times [2024-06-21 20:39:09,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:09,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994483711] [2024-06-21 20:39:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:10,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994483711] [2024-06-21 20:39:10,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994483711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:10,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:10,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:10,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967187131] [2024-06-21 20:39:10,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:10,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:10,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:10,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 197 transitions, 1648 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:39:10,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:10,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:10,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:10,933 INFO L124 PetriNetUnfolderBase]: 2086/3287 cut-off events. [2024-06-21 20:39:10,933 INFO L125 PetriNetUnfolderBase]: For 298544/298547 co-relation queries the response was YES. [2024-06-21 20:39:10,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27723 conditions, 3287 events. 2086/3287 cut-off events. For 298544/298547 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17271 event pairs, 536 based on Foata normal form. 1/3284 useless extension candidates. Maximal degree in co-relation 27645. Up to 3014 conditions per place. [2024-06-21 20:39:10,967 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 173 selfloop transitions, 28 changer transitions 0/211 dead transitions. [2024-06-21 20:39:10,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2143 flow [2024-06-21 20:39:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:39:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:39:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:39:10,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 20:39:10,969 INFO L175 Difference]: Start difference. First operand has 164 places, 197 transitions, 1648 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:39:10,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2143 flow [2024-06-21 20:39:11,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 211 transitions, 2063 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:11,169 INFO L231 Difference]: Finished difference. Result has 168 places, 202 transitions, 1712 flow [2024-06-21 20:39:11,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1712, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2024-06-21 20:39:11,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-21 20:39:11,170 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 1712 flow [2024-06-21 20:39:11,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:39:11,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:11,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:11,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:39:11,170 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)] === [2024-06-21 20:39:11,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1405668484, now seen corresponding path program 3 times [2024-06-21 20:39:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:11,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437530568] [2024-06-21 20:39:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:11,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:12,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:12,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437530568] [2024-06-21 20:39:12,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437530568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:12,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:12,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:39:12,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935021497] [2024-06-21 20:39:12,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:12,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:39:12,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:39:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:39:12,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 20:39:12,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 1712 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:12,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:12,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 20:39:12,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:12,720 INFO L124 PetriNetUnfolderBase]: 1972/3170 cut-off events. [2024-06-21 20:39:12,720 INFO L125 PetriNetUnfolderBase]: For 307213/307216 co-relation queries the response was YES. [2024-06-21 20:39:12,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27248 conditions, 3170 events. 1972/3170 cut-off events. For 307213/307216 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17143 event pairs, 524 based on Foata normal form. 5/3171 useless extension candidates. Maximal degree in co-relation 27168. Up to 2754 conditions per place. [2024-06-21 20:39:12,749 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 158 selfloop transitions, 30 changer transitions 0/216 dead transitions. [2024-06-21 20:39:12,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 216 transitions, 2172 flow [2024-06-21 20:39:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:39:12,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:39:12,752 INFO L175 Difference]: Start difference. First operand has 168 places, 202 transitions, 1712 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:39:12,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 216 transitions, 2172 flow [2024-06-21 20:39:12,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 216 transitions, 2077 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:39:12,995 INFO L231 Difference]: Finished difference. Result has 171 places, 205 transitions, 1748 flow [2024-06-21 20:39:12,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1748, PETRI_PLACES=171, PETRI_TRANSITIONS=205} [2024-06-21 20:39:12,996 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-21 20:39:12,996 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 205 transitions, 1748 flow [2024-06-21 20:39:12,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:12,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:12,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:12,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:39:12,996 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:12,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash -334988758, now seen corresponding path program 1 times [2024-06-21 20:39:12,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:12,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512946937] [2024-06-21 20:39:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:12,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:13,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:13,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512946937] [2024-06-21 20:39:13,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512946937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:13,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439714207] [2024-06-21 20:39:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:13,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:13,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:13,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:13,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:13,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 205 transitions, 1748 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:13,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:13,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:13,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:14,599 INFO L124 PetriNetUnfolderBase]: 2365/3669 cut-off events. [2024-06-21 20:39:14,599 INFO L125 PetriNetUnfolderBase]: For 352353/352356 co-relation queries the response was YES. [2024-06-21 20:39:14,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31068 conditions, 3669 events. 2365/3669 cut-off events. For 352353/352356 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 19262 event pairs, 383 based on Foata normal form. 16/3681 useless extension candidates. Maximal degree in co-relation 30986. Up to 2439 conditions per place. [2024-06-21 20:39:14,626 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 174 selfloop transitions, 72 changer transitions 0/251 dead transitions. [2024-06-21 20:39:14,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 251 transitions, 2614 flow [2024-06-21 20:39:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:39:14,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 20:39:14,628 INFO L175 Difference]: Start difference. First operand has 171 places, 205 transitions, 1748 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:39:14,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 251 transitions, 2614 flow [2024-06-21 20:39:14,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 251 transitions, 2507 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:14,848 INFO L231 Difference]: Finished difference. Result has 175 places, 207 transitions, 1841 flow [2024-06-21 20:39:14,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1841, PETRI_PLACES=175, PETRI_TRANSITIONS=207} [2024-06-21 20:39:14,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-21 20:39:14,849 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 207 transitions, 1841 flow [2024-06-21 20:39:14,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:14,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:14,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:14,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:39:14,850 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:14,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:14,850 INFO L85 PathProgramCache]: Analyzing trace with hash -276776338, now seen corresponding path program 2 times [2024-06-21 20:39:14,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:14,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512206577] [2024-06-21 20:39:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:14,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:15,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:15,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512206577] [2024-06-21 20:39:15,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512206577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:15,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:15,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103648707] [2024-06-21 20:39:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:15,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:15,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:15,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:15,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 207 transitions, 1841 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:15,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:15,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:15,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:16,710 INFO L124 PetriNetUnfolderBase]: 2457/3831 cut-off events. [2024-06-21 20:39:16,710 INFO L125 PetriNetUnfolderBase]: For 371754/371757 co-relation queries the response was YES. [2024-06-21 20:39:16,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32325 conditions, 3831 events. 2457/3831 cut-off events. For 371754/371757 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20527 event pairs, 604 based on Foata normal form. 24/3851 useless extension candidates. Maximal degree in co-relation 32242. Up to 3144 conditions per place. [2024-06-21 20:39:16,740 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 174 selfloop transitions, 66 changer transitions 0/245 dead transitions. [2024-06-21 20:39:16,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 245 transitions, 2479 flow [2024-06-21 20:39:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:39:16,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-21 20:39:16,741 INFO L175 Difference]: Start difference. First operand has 175 places, 207 transitions, 1841 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:39:16,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 245 transitions, 2479 flow [2024-06-21 20:39:17,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 245 transitions, 2391 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:17,040 INFO L231 Difference]: Finished difference. Result has 179 places, 209 transitions, 1945 flow [2024-06-21 20:39:17,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1945, PETRI_PLACES=179, PETRI_TRANSITIONS=209} [2024-06-21 20:39:17,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-21 20:39:17,040 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 209 transitions, 1945 flow [2024-06-21 20:39:17,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:17,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:17,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:17,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:39:17,041 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:17,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash -628855612, now seen corresponding path program 3 times [2024-06-21 20:39:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756792902] [2024-06-21 20:39:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:17,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756792902] [2024-06-21 20:39:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756792902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944766621] [2024-06-21 20:39:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:17,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:17,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:17,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 209 transitions, 1945 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:17,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:17,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:17,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:18,867 INFO L124 PetriNetUnfolderBase]: 2515/3939 cut-off events. [2024-06-21 20:39:18,867 INFO L125 PetriNetUnfolderBase]: For 380151/380154 co-relation queries the response was YES. [2024-06-21 20:39:18,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33410 conditions, 3939 events. 2515/3939 cut-off events. For 380151/380154 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21377 event pairs, 604 based on Foata normal form. 16/3951 useless extension candidates. Maximal degree in co-relation 33325. Up to 3132 conditions per place. [2024-06-21 20:39:18,901 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 177 selfloop transitions, 68 changer transitions 0/250 dead transitions. [2024-06-21 20:39:18,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 250 transitions, 2587 flow [2024-06-21 20:39:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:39:18,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 20:39:18,902 INFO L175 Difference]: Start difference. First operand has 179 places, 209 transitions, 1945 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:39:18,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 250 transitions, 2587 flow [2024-06-21 20:39:19,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 250 transitions, 2425 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:19,180 INFO L231 Difference]: Finished difference. Result has 181 places, 210 transitions, 1955 flow [2024-06-21 20:39:19,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1955, PETRI_PLACES=181, PETRI_TRANSITIONS=210} [2024-06-21 20:39:19,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-21 20:39:19,181 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 210 transitions, 1955 flow [2024-06-21 20:39:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:19,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:39:19,181 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:19,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2058475178, now seen corresponding path program 4 times [2024-06-21 20:39:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:19,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760743263] [2024-06-21 20:39:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:19,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:20,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760743263] [2024-06-21 20:39:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760743263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:20,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:20,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:20,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185246256] [2024-06-21 20:39:20,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:20,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:20,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:20,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:20,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:20,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:20,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 210 transitions, 1955 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:20,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:20,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:20,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:21,062 INFO L124 PetriNetUnfolderBase]: 2573/4047 cut-off events. [2024-06-21 20:39:21,062 INFO L125 PetriNetUnfolderBase]: For 394229/394232 co-relation queries the response was YES. [2024-06-21 20:39:21,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33951 conditions, 4047 events. 2573/4047 cut-off events. For 394229/394232 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22274 event pairs, 619 based on Foata normal form. 16/4059 useless extension candidates. Maximal degree in co-relation 33865. Up to 3097 conditions per place. [2024-06-21 20:39:21,099 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 176 selfloop transitions, 71 changer transitions 0/252 dead transitions. [2024-06-21 20:39:21,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 252 transitions, 2605 flow [2024-06-21 20:39:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 20:39:21,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 20:39:21,100 INFO L175 Difference]: Start difference. First operand has 181 places, 210 transitions, 1955 flow. Second operand 9 states and 189 transitions. [2024-06-21 20:39:21,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 252 transitions, 2605 flow [2024-06-21 20:39:21,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 252 transitions, 2451 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:21,375 INFO L231 Difference]: Finished difference. Result has 183 places, 211 transitions, 1981 flow [2024-06-21 20:39:21,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1981, PETRI_PLACES=183, PETRI_TRANSITIONS=211} [2024-06-21 20:39:21,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-21 20:39:21,375 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 211 transitions, 1981 flow [2024-06-21 20:39:21,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:21,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:21,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:21,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:39:21,376 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)] === [2024-06-21 20:39:21,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash 672409988, now seen corresponding path program 1 times [2024-06-21 20:39:21,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:21,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647829460] [2024-06-21 20:39:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:21,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:22,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647829460] [2024-06-21 20:39:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647829460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:22,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:22,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:22,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406863989] [2024-06-21 20:39:22,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:22,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:22,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:22,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:22,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:22,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:22,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 211 transitions, 1981 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:22,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:22,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:22,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:23,109 INFO L124 PetriNetUnfolderBase]: 2434/3904 cut-off events. [2024-06-21 20:39:23,109 INFO L125 PetriNetUnfolderBase]: For 390592/390595 co-relation queries the response was YES. [2024-06-21 20:39:23,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33399 conditions, 3904 events. 2434/3904 cut-off events. For 390592/390595 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22104 event pairs, 666 based on Foata normal form. 4/3892 useless extension candidates. Maximal degree in co-relation 33312. Up to 3516 conditions per place. [2024-06-21 20:39:23,147 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 185 selfloop transitions, 29 changer transitions 0/237 dead transitions. [2024-06-21 20:39:23,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 237 transitions, 2537 flow [2024-06-21 20:39:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:39:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:39:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:39:23,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:39:23,148 INFO L175 Difference]: Start difference. First operand has 183 places, 211 transitions, 1981 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:39:23,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 237 transitions, 2537 flow [2024-06-21 20:39:23,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 2375 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:23,486 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 1960 flow [2024-06-21 20:39:23,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1960, PETRI_PLACES=184, PETRI_TRANSITIONS=215} [2024-06-21 20:39:23,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-21 20:39:23,487 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 1960 flow [2024-06-21 20:39:23,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:23,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:23,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:23,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:39:23,487 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)] === [2024-06-21 20:39:23,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1536214476, now seen corresponding path program 5 times [2024-06-21 20:39:23,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:23,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012683830] [2024-06-21 20:39:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:23,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:24,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:24,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012683830] [2024-06-21 20:39:24,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012683830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:24,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:24,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:24,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196313640] [2024-06-21 20:39:24,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:24,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:24,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:24,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:24,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 215 transitions, 1960 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:24,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:24,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:24,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:25,324 INFO L124 PetriNetUnfolderBase]: 2702/4284 cut-off events. [2024-06-21 20:39:25,324 INFO L125 PetriNetUnfolderBase]: For 435341/435344 co-relation queries the response was YES. [2024-06-21 20:39:25,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36061 conditions, 4284 events. 2702/4284 cut-off events. For 435341/435344 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24121 event pairs, 510 based on Foata normal form. 16/4296 useless extension candidates. Maximal degree in co-relation 35973. Up to 3205 conditions per place. [2024-06-21 20:39:25,364 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 180 selfloop transitions, 78 changer transitions 0/263 dead transitions. [2024-06-21 20:39:25,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 263 transitions, 2876 flow [2024-06-21 20:39:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 20:39:25,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-21 20:39:25,365 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 1960 flow. Second operand 9 states and 194 transitions. [2024-06-21 20:39:25,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 263 transitions, 2876 flow [2024-06-21 20:39:25,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 263 transitions, 2763 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:39:25,707 INFO L231 Difference]: Finished difference. Result has 187 places, 217 transitions, 2075 flow [2024-06-21 20:39:25,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2075, PETRI_PLACES=187, PETRI_TRANSITIONS=217} [2024-06-21 20:39:25,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-21 20:39:25,707 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 217 transitions, 2075 flow [2024-06-21 20:39:25,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:25,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:25,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:25,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:39:25,708 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)] === [2024-06-21 20:39:25,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1692980172, now seen corresponding path program 6 times [2024-06-21 20:39:25,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:25,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021263092] [2024-06-21 20:39:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:25,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:26,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:26,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021263092] [2024-06-21 20:39:26,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021263092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:26,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:26,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:26,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459964046] [2024-06-21 20:39:26,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:26,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:26,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:26,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:26,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:26,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:26,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 217 transitions, 2075 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:26,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:26,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:26,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:27,606 INFO L124 PetriNetUnfolderBase]: 2871/4563 cut-off events. [2024-06-21 20:39:27,606 INFO L125 PetriNetUnfolderBase]: For 481299/481302 co-relation queries the response was YES. [2024-06-21 20:39:27,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39095 conditions, 4563 events. 2871/4563 cut-off events. For 481299/481302 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26202 event pairs, 705 based on Foata normal form. 16/4575 useless extension candidates. Maximal degree in co-relation 39006. Up to 3696 conditions per place. [2024-06-21 20:39:27,651 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 73 changer transitions 0/265 dead transitions. [2024-06-21 20:39:27,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 265 transitions, 3005 flow [2024-06-21 20:39:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 20:39:27,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-21 20:39:27,652 INFO L175 Difference]: Start difference. First operand has 187 places, 217 transitions, 2075 flow. Second operand 9 states and 194 transitions. [2024-06-21 20:39:27,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 265 transitions, 3005 flow [2024-06-21 20:39:28,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 265 transitions, 2892 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:28,006 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 2184 flow [2024-06-21 20:39:28,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2184, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-21 20:39:28,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-21 20:39:28,007 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 2184 flow [2024-06-21 20:39:28,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:28,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:28,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:28,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:39:28,007 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)] === [2024-06-21 20:39:28,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1760040596, now seen corresponding path program 7 times [2024-06-21 20:39:28,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:28,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399586969] [2024-06-21 20:39:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:28,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:28,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:28,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399586969] [2024-06-21 20:39:28,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399586969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:28,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:28,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:28,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356467481] [2024-06-21 20:39:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:28,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:28,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:28,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:28,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 2184 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:28,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:28,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:28,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:30,046 INFO L124 PetriNetUnfolderBase]: 2946/4688 cut-off events. [2024-06-21 20:39:30,046 INFO L125 PetriNetUnfolderBase]: For 504243/504246 co-relation queries the response was YES. [2024-06-21 20:39:30,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40226 conditions, 4688 events. 2946/4688 cut-off events. For 504243/504246 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27202 event pairs, 740 based on Foata normal form. 20/4704 useless extension candidates. Maximal degree in co-relation 40135. Up to 3977 conditions per place. [2024-06-21 20:39:30,093 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 66 changer transitions 0/258 dead transitions. [2024-06-21 20:39:30,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 258 transitions, 2846 flow [2024-06-21 20:39:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 20:39:30,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 20:39:30,095 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 2184 flow. Second operand 9 states and 186 transitions. [2024-06-21 20:39:30,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 258 transitions, 2846 flow [2024-06-21 20:39:30,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 258 transitions, 2732 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:30,551 INFO L231 Difference]: Finished difference. Result has 195 places, 220 transitions, 2247 flow [2024-06-21 20:39:30,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2247, PETRI_PLACES=195, PETRI_TRANSITIONS=220} [2024-06-21 20:39:30,552 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-21 20:39:30,552 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 220 transitions, 2247 flow [2024-06-21 20:39:30,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:30,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:30,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:30,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:39:30,552 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)] === [2024-06-21 20:39:30,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:30,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1766296706, now seen corresponding path program 8 times [2024-06-21 20:39:30,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:30,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482855553] [2024-06-21 20:39:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:30,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482855553] [2024-06-21 20:39:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482855553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:31,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:31,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:31,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196104640] [2024-06-21 20:39:31,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:31,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:31,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:31,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:31,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:31,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:31,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 220 transitions, 2247 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:31,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:31,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:31,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:32,536 INFO L124 PetriNetUnfolderBase]: 3021/4823 cut-off events. [2024-06-21 20:39:32,536 INFO L125 PetriNetUnfolderBase]: For 522100/522103 co-relation queries the response was YES. [2024-06-21 20:39:32,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41298 conditions, 4823 events. 3021/4823 cut-off events. For 522100/522103 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28317 event pairs, 764 based on Foata normal form. 20/4839 useless extension candidates. Maximal degree in co-relation 41205. Up to 4102 conditions per place. [2024-06-21 20:39:32,585 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 186 selfloop transitions, 67 changer transitions 0/258 dead transitions. [2024-06-21 20:39:32,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 258 transitions, 2907 flow [2024-06-21 20:39:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 20:39:32,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-21 20:39:32,586 INFO L175 Difference]: Start difference. First operand has 195 places, 220 transitions, 2247 flow. Second operand 9 states and 184 transitions. [2024-06-21 20:39:32,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 258 transitions, 2907 flow [2024-06-21 20:39:33,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 258 transitions, 2756 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:33,029 INFO L231 Difference]: Finished difference. Result has 197 places, 221 transitions, 2277 flow [2024-06-21 20:39:33,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2277, PETRI_PLACES=197, PETRI_TRANSITIONS=221} [2024-06-21 20:39:33,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-21 20:39:33,029 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 221 transitions, 2277 flow [2024-06-21 20:39:33,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:33,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:33,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:33,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:39:33,030 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)] === [2024-06-21 20:39:33,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:33,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1593806816, now seen corresponding path program 9 times [2024-06-21 20:39:33,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:33,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020502165] [2024-06-21 20:39:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:33,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:33,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:33,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020502165] [2024-06-21 20:39:33,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020502165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:33,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:33,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:33,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334473993] [2024-06-21 20:39:33,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:33,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:33,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:33,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 221 transitions, 2277 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:33,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:33,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:33,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:35,040 INFO L124 PetriNetUnfolderBase]: 2985/4767 cut-off events. [2024-06-21 20:39:35,040 INFO L125 PetriNetUnfolderBase]: For 508135/508138 co-relation queries the response was YES. [2024-06-21 20:39:35,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40068 conditions, 4767 events. 2985/4767 cut-off events. For 508135/508138 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27959 event pairs, 741 based on Foata normal form. 20/4783 useless extension candidates. Maximal degree in co-relation 39974. Up to 4046 conditions per place. [2024-06-21 20:39:35,088 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 185 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-21 20:39:35,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 261 transitions, 2915 flow [2024-06-21 20:39:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:39:35,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 20:39:35,089 INFO L175 Difference]: Start difference. First operand has 197 places, 221 transitions, 2277 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:39:35,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 261 transitions, 2915 flow [2024-06-21 20:39:35,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 261 transitions, 2744 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:35,533 INFO L231 Difference]: Finished difference. Result has 199 places, 221 transitions, 2255 flow [2024-06-21 20:39:35,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2106, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2255, PETRI_PLACES=199, PETRI_TRANSITIONS=221} [2024-06-21 20:39:35,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-21 20:39:35,533 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 221 transitions, 2255 flow [2024-06-21 20:39:35,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:35,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:35,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:39:35,534 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)] === [2024-06-21 20:39:35,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1859213952, now seen corresponding path program 10 times [2024-06-21 20:39:35,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:35,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576254175] [2024-06-21 20:39:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:35,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:36,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:36,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576254175] [2024-06-21 20:39:36,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576254175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:36,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:36,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:36,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163964248] [2024-06-21 20:39:36,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:36,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:36,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:36,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:36,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:36,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 221 transitions, 2255 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:36,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:36,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:36,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:37,502 INFO L124 PetriNetUnfolderBase]: 3043/4865 cut-off events. [2024-06-21 20:39:37,502 INFO L125 PetriNetUnfolderBase]: For 516463/516466 co-relation queries the response was YES. [2024-06-21 20:39:37,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40525 conditions, 4865 events. 3043/4865 cut-off events. For 516463/516466 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28654 event pairs, 732 based on Foata normal form. 16/4877 useless extension candidates. Maximal degree in co-relation 40430. Up to 3914 conditions per place. [2024-06-21 20:39:37,551 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 189 selfloop transitions, 69 changer transitions 0/263 dead transitions. [2024-06-21 20:39:37,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 263 transitions, 2941 flow [2024-06-21 20:39:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:39:37,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 20:39:37,552 INFO L175 Difference]: Start difference. First operand has 199 places, 221 transitions, 2255 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:39:37,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 263 transitions, 2941 flow [2024-06-21 20:39:38,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 263 transitions, 2794 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:38,013 INFO L231 Difference]: Finished difference. Result has 200 places, 222 transitions, 2294 flow [2024-06-21 20:39:38,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2294, PETRI_PLACES=200, PETRI_TRANSITIONS=222} [2024-06-21 20:39:38,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 20:39:38,014 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 222 transitions, 2294 flow [2024-06-21 20:39:38,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:38,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:38,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:39:38,015 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)] === [2024-06-21 20:39:38,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1521293711, now seen corresponding path program 1 times [2024-06-21 20:39:38,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:38,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355649859] [2024-06-21 20:39:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:38,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:38,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:38,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355649859] [2024-06-21 20:39:38,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355649859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:38,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:38,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:38,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644713673] [2024-06-21 20:39:38,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:38,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:38,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:38,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:38,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 222 transitions, 2294 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:39:38,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:38,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:38,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:39,689 INFO L124 PetriNetUnfolderBase]: 2888/4694 cut-off events. [2024-06-21 20:39:39,689 INFO L125 PetriNetUnfolderBase]: For 512167/512170 co-relation queries the response was YES. [2024-06-21 20:39:39,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40024 conditions, 4694 events. 2888/4694 cut-off events. For 512167/512170 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28374 event pairs, 803 based on Foata normal form. 4/4658 useless extension candidates. Maximal degree in co-relation 39928. Up to 4282 conditions per place. [2024-06-21 20:39:39,739 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 197 selfloop transitions, 24 changer transitions 0/244 dead transitions. [2024-06-21 20:39:39,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 244 transitions, 2839 flow [2024-06-21 20:39:39,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:39:39,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 20:39:39,740 INFO L175 Difference]: Start difference. First operand has 200 places, 222 transitions, 2294 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:39:39,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 244 transitions, 2839 flow [2024-06-21 20:39:40,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 244 transitions, 2673 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:40,179 INFO L231 Difference]: Finished difference. Result has 200 places, 226 transitions, 2246 flow [2024-06-21 20:39:40,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2246, PETRI_PLACES=200, PETRI_TRANSITIONS=226} [2024-06-21 20:39:40,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 20:39:40,180 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 226 transitions, 2246 flow [2024-06-21 20:39:40,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:39:40,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:40,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:40,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:39:40,180 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)] === [2024-06-21 20:39:40,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1528912271, now seen corresponding path program 2 times [2024-06-21 20:39:40,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:40,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633896136] [2024-06-21 20:39:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:40,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633896136] [2024-06-21 20:39:40,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633896136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:40,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:40,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:40,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095838346] [2024-06-21 20:39:40,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:40,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:40,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:41,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:41,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 226 transitions, 2246 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:39:41,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:41,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:41,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:41,862 INFO L124 PetriNetUnfolderBase]: 2890/4697 cut-off events. [2024-06-21 20:39:41,862 INFO L125 PetriNetUnfolderBase]: For 520704/520707 co-relation queries the response was YES. [2024-06-21 20:39:41,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39725 conditions, 4697 events. 2890/4697 cut-off events. For 520704/520707 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28393 event pairs, 803 based on Foata normal form. 4/4661 useless extension candidates. Maximal degree in co-relation 39628. Up to 4253 conditions per place. [2024-06-21 20:39:41,911 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 186 selfloop transitions, 36 changer transitions 0/245 dead transitions. [2024-06-21 20:39:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 245 transitions, 2916 flow [2024-06-21 20:39:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:39:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:39:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:39:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:39:41,912 INFO L175 Difference]: Start difference. First operand has 200 places, 226 transitions, 2246 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:39:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 245 transitions, 2916 flow [2024-06-21 20:39:42,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 245 transitions, 2839 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:42,493 INFO L231 Difference]: Finished difference. Result has 202 places, 229 transitions, 2306 flow [2024-06-21 20:39:42,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2306, PETRI_PLACES=202, PETRI_TRANSITIONS=229} [2024-06-21 20:39:42,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-21 20:39:42,493 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 229 transitions, 2306 flow [2024-06-21 20:39:42,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:39:42,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:42,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:42,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:39:42,493 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)] === [2024-06-21 20:39:42,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:42,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1708348412, now seen corresponding path program 2 times [2024-06-21 20:39:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:42,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69094794] [2024-06-21 20:39:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:42,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:43,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:43,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69094794] [2024-06-21 20:39:43,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69094794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:43,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:43,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:43,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246654178] [2024-06-21 20:39:43,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:43,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:43,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:43,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 229 transitions, 2306 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:43,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:43,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:43,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:44,487 INFO L124 PetriNetUnfolderBase]: 2926/4752 cut-off events. [2024-06-21 20:39:44,487 INFO L125 PetriNetUnfolderBase]: For 543102/543105 co-relation queries the response was YES. [2024-06-21 20:39:44,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40561 conditions, 4752 events. 2926/4752 cut-off events. For 543102/543105 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28807 event pairs, 797 based on Foata normal form. 4/4716 useless extension candidates. Maximal degree in co-relation 40463. Up to 4256 conditions per place. [2024-06-21 20:39:44,535 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 45 changer transitions 0/256 dead transitions. [2024-06-21 20:39:44,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 256 transitions, 3258 flow [2024-06-21 20:39:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:39:44,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:39:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:39:44,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 20:39:44,536 INFO L175 Difference]: Start difference. First operand has 202 places, 229 transitions, 2306 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:39:44,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 256 transitions, 3258 flow [2024-06-21 20:39:45,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 256 transitions, 3171 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:39:45,037 INFO L231 Difference]: Finished difference. Result has 207 places, 237 transitions, 2489 flow [2024-06-21 20:39:45,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2489, PETRI_PLACES=207, PETRI_TRANSITIONS=237} [2024-06-21 20:39:45,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-21 20:39:45,037 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 237 transitions, 2489 flow [2024-06-21 20:39:45,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:45,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:45,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:45,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:39:45,038 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:45,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:45,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1528908706, now seen corresponding path program 3 times [2024-06-21 20:39:45,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:45,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98433221] [2024-06-21 20:39:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:45,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:46,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:46,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98433221] [2024-06-21 20:39:46,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98433221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:46,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:46,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:46,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698742369] [2024-06-21 20:39:46,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:46,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:46,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:46,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:46,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:46,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 237 transitions, 2489 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:46,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:46,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:47,003 INFO L124 PetriNetUnfolderBase]: 2930/4758 cut-off events. [2024-06-21 20:39:47,004 INFO L125 PetriNetUnfolderBase]: For 560183/560186 co-relation queries the response was YES. [2024-06-21 20:39:47,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41431 conditions, 4758 events. 2930/4758 cut-off events. For 560183/560186 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28822 event pairs, 805 based on Foata normal form. 4/4722 useless extension candidates. Maximal degree in co-relation 41331. Up to 4302 conditions per place. [2024-06-21 20:39:47,055 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 194 selfloop transitions, 41 changer transitions 0/258 dead transitions. [2024-06-21 20:39:47,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 258 transitions, 3224 flow [2024-06-21 20:39:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:39:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:39:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:39:47,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:39:47,056 INFO L175 Difference]: Start difference. First operand has 207 places, 237 transitions, 2489 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:39:47,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 258 transitions, 3224 flow [2024-06-21 20:39:47,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 258 transitions, 3082 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 20:39:47,614 INFO L231 Difference]: Finished difference. Result has 211 places, 241 transitions, 2531 flow [2024-06-21 20:39:47,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2531, PETRI_PLACES=211, PETRI_TRANSITIONS=241} [2024-06-21 20:39:47,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 20:39:47,614 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 241 transitions, 2531 flow [2024-06-21 20:39:47,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:47,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:47,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:39:47,614 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:47,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1528922191, now seen corresponding path program 1 times [2024-06-21 20:39:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281288802] [2024-06-21 20:39:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:48,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:48,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281288802] [2024-06-21 20:39:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281288802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:48,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:48,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:39:48,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211687680] [2024-06-21 20:39:48,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:48,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:39:48,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:39:48,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:39:48,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:39:48,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 241 transitions, 2531 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:48,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:48,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:39:48,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:49,527 INFO L124 PetriNetUnfolderBase]: 2940/4771 cut-off events. [2024-06-21 20:39:49,527 INFO L125 PetriNetUnfolderBase]: For 575484/575484 co-relation queries the response was YES. [2024-06-21 20:39:49,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41856 conditions, 4771 events. 2940/4771 cut-off events. For 575484/575484 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28874 event pairs, 802 based on Foata normal form. 2/4734 useless extension candidates. Maximal degree in co-relation 41754. Up to 4414 conditions per place. [2024-06-21 20:39:49,579 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 220 selfloop transitions, 18 changer transitions 0/261 dead transitions. [2024-06-21 20:39:49,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 261 transitions, 3121 flow [2024-06-21 20:39:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:39:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:39:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:39:49,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:39:49,580 INFO L175 Difference]: Start difference. First operand has 211 places, 241 transitions, 2531 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:39:49,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 261 transitions, 3121 flow [2024-06-21 20:39:50,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 261 transitions, 2988 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 20:39:50,189 INFO L231 Difference]: Finished difference. Result has 213 places, 244 transitions, 2516 flow [2024-06-21 20:39:50,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2516, PETRI_PLACES=213, PETRI_TRANSITIONS=244} [2024-06-21 20:39:50,190 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-21 20:39:50,190 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 244 transitions, 2516 flow [2024-06-21 20:39:50,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:50,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:50,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:50,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:39:50,191 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)] === [2024-06-21 20:39:50,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash -704823732, now seen corresponding path program 11 times [2024-06-21 20:39:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:50,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596091180] [2024-06-21 20:39:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:50,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:51,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:51,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596091180] [2024-06-21 20:39:51,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596091180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:51,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:51,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:51,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446436461] [2024-06-21 20:39:51,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:51,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:51,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:51,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:51,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:51,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:51,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 244 transitions, 2516 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:51,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:51,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:51,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:52,301 INFO L124 PetriNetUnfolderBase]: 3180/5081 cut-off events. [2024-06-21 20:39:52,301 INFO L125 PetriNetUnfolderBase]: For 623982/623985 co-relation queries the response was YES. [2024-06-21 20:39:52,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43899 conditions, 5081 events. 3180/5081 cut-off events. For 623982/623985 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30193 event pairs, 779 based on Foata normal form. 22/5095 useless extension candidates. Maximal degree in co-relation 43796. Up to 4356 conditions per place. [2024-06-21 20:39:52,349 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 62 changer transitions 0/281 dead transitions. [2024-06-21 20:39:52,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 281 transitions, 3226 flow [2024-06-21 20:39:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:39:52,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-21 20:39:52,350 INFO L175 Difference]: Start difference. First operand has 213 places, 244 transitions, 2516 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:39:52,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 281 transitions, 3226 flow [2024-06-21 20:39:52,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 281 transitions, 3130 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:39:52,849 INFO L231 Difference]: Finished difference. Result has 216 places, 245 transitions, 2595 flow [2024-06-21 20:39:52,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2595, PETRI_PLACES=216, PETRI_TRANSITIONS=245} [2024-06-21 20:39:52,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-21 20:39:52,849 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 245 transitions, 2595 flow [2024-06-21 20:39:52,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:52,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:52,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:52,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:39:52,850 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:52,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:52,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1351494588, now seen corresponding path program 12 times [2024-06-21 20:39:52,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:52,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135153283] [2024-06-21 20:39:52,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:52,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:53,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135153283] [2024-06-21 20:39:53,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135153283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:53,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:53,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:53,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831619846] [2024-06-21 20:39:53,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:53,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:53,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:53,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:53,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 245 transitions, 2595 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:53,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:53,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:53,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:54,957 INFO L124 PetriNetUnfolderBase]: 3255/5216 cut-off events. [2024-06-21 20:39:54,958 INFO L125 PetriNetUnfolderBase]: For 646810/646813 co-relation queries the response was YES. [2024-06-21 20:39:54,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45161 conditions, 5216 events. 3255/5216 cut-off events. For 646810/646813 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31291 event pairs, 803 based on Foata normal form. 22/5230 useless extension candidates. Maximal degree in co-relation 45057. Up to 4481 conditions per place. [2024-06-21 20:39:55,014 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 63 changer transitions 0/282 dead transitions. [2024-06-21 20:39:55,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 282 transitions, 3309 flow [2024-06-21 20:39:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 20:39:55,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:39:55,015 INFO L175 Difference]: Start difference. First operand has 216 places, 245 transitions, 2595 flow. Second operand 9 states and 180 transitions. [2024-06-21 20:39:55,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 282 transitions, 3309 flow [2024-06-21 20:39:55,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 282 transitions, 3160 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:55,640 INFO L231 Difference]: Finished difference. Result has 218 places, 246 transitions, 2625 flow [2024-06-21 20:39:55,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2625, PETRI_PLACES=218, PETRI_TRANSITIONS=246} [2024-06-21 20:39:55,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-21 20:39:55,641 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 246 transitions, 2625 flow [2024-06-21 20:39:55,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:55,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:55,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:39:55,642 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:55,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1351316958, now seen corresponding path program 13 times [2024-06-21 20:39:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205003980] [2024-06-21 20:39:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:56,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:56,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205003980] [2024-06-21 20:39:56,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205003980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:56,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:56,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:56,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595168722] [2024-06-21 20:39:56,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:56,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:56,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:56,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:56,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 246 transitions, 2625 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:56,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:56,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:56,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:57,750 INFO L124 PetriNetUnfolderBase]: 3313/5314 cut-off events. [2024-06-21 20:39:57,751 INFO L125 PetriNetUnfolderBase]: For 658297/658300 co-relation queries the response was YES. [2024-06-21 20:39:57,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45804 conditions, 5314 events. 3313/5314 cut-off events. For 658297/658300 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 32033 event pairs, 789 based on Foata normal form. 18/5324 useless extension candidates. Maximal degree in co-relation 45699. Up to 4183 conditions per place. [2024-06-21 20:39:57,807 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 216 selfloop transitions, 67 changer transitions 0/288 dead transitions. [2024-06-21 20:39:57,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 288 transitions, 3603 flow [2024-06-21 20:39:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 20:39:57,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-21 20:39:57,808 INFO L175 Difference]: Start difference. First operand has 218 places, 246 transitions, 2625 flow. Second operand 9 states and 184 transitions. [2024-06-21 20:39:57,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 288 transitions, 3603 flow [2024-06-21 20:39:58,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 288 transitions, 3450 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:58,373 INFO L231 Difference]: Finished difference. Result has 220 places, 247 transitions, 2658 flow [2024-06-21 20:39:58,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2658, PETRI_PLACES=220, PETRI_TRANSITIONS=247} [2024-06-21 20:39:58,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-21 20:39:58,373 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 247 transitions, 2658 flow [2024-06-21 20:39:58,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:58,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:58,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:58,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:39:58,374 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:58,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash 719331916, now seen corresponding path program 14 times [2024-06-21 20:39:58,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:58,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114201483] [2024-06-21 20:39:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:58,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:59,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:59,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114201483] [2024-06-21 20:39:59,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114201483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:59,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:59,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:59,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560038396] [2024-06-21 20:39:59,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:59,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:59,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:59,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:59,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:39:59,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 247 transitions, 2658 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:59,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:59,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:39:59,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:00,541 INFO L124 PetriNetUnfolderBase]: 3277/5258 cut-off events. [2024-06-21 20:40:00,542 INFO L125 PetriNetUnfolderBase]: For 642777/642780 co-relation queries the response was YES. [2024-06-21 20:40:00,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44282 conditions, 5258 events. 3277/5258 cut-off events. For 642777/642780 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31639 event pairs, 796 based on Foata normal form. 22/5272 useless extension candidates. Maximal degree in co-relation 44176. Up to 4523 conditions per place. [2024-06-21 20:40:00,598 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 66 changer transitions 0/282 dead transitions. [2024-06-21 20:40:00,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 282 transitions, 3324 flow [2024-06-21 20:40:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:40:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:40:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:40:00,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 20:40:00,599 INFO L175 Difference]: Start difference. First operand has 220 places, 247 transitions, 2658 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:40:00,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 282 transitions, 3324 flow [2024-06-21 20:40:01,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 282 transitions, 3061 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 20:40:01,398 INFO L231 Difference]: Finished difference. Result has 221 places, 247 transitions, 2534 flow [2024-06-21 20:40:01,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2534, PETRI_PLACES=221, PETRI_TRANSITIONS=247} [2024-06-21 20:40:01,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 20:40:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 247 transitions, 2534 flow [2024-06-21 20:40:01,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:01,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:01,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:01,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:40:01,399 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)] === [2024-06-21 20:40:01,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash -3517583, now seen corresponding path program 3 times [2024-06-21 20:40:01,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:01,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100089102] [2024-06-21 20:40:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:02,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:02,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100089102] [2024-06-21 20:40:02,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100089102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:02,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:02,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:02,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970939228] [2024-06-21 20:40:02,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:02,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:02,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:02,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:02,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:02,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:02,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 247 transitions, 2534 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:40:02,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:02,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:02,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:03,240 INFO L124 PetriNetUnfolderBase]: 3144/5114 cut-off events. [2024-06-21 20:40:03,240 INFO L125 PetriNetUnfolderBase]: For 615086/615086 co-relation queries the response was YES. [2024-06-21 20:40:03,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43154 conditions, 5114 events. 3144/5114 cut-off events. For 615086/615086 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31349 event pairs, 841 based on Foata normal form. 1/5061 useless extension candidates. Maximal degree in co-relation 43048. Up to 4672 conditions per place. [2024-06-21 20:40:03,295 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 39 changer transitions 0/281 dead transitions. [2024-06-21 20:40:03,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 281 transitions, 3340 flow [2024-06-21 20:40:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:40:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:40:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:40:03,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:40:03,296 INFO L175 Difference]: Start difference. First operand has 221 places, 247 transitions, 2534 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:40:03,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 281 transitions, 3340 flow [2024-06-21 20:40:03,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 281 transitions, 3173 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:40:03,981 INFO L231 Difference]: Finished difference. Result has 225 places, 266 transitions, 2736 flow [2024-06-21 20:40:03,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2736, PETRI_PLACES=225, PETRI_TRANSITIONS=266} [2024-06-21 20:40:03,981 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-21 20:40:03,982 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 266 transitions, 2736 flow [2024-06-21 20:40:03,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:40:03,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:03,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:03,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:40:03,982 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)] === [2024-06-21 20:40:03,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1884891377, now seen corresponding path program 4 times [2024-06-21 20:40:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:03,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857249067] [2024-06-21 20:40:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:03,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:04,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:04,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857249067] [2024-06-21 20:40:04,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857249067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:04,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:04,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:40:04,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114613800] [2024-06-21 20:40:04,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:04,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:40:04,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:40:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:40:04,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:04,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 266 transitions, 2736 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:40:04,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:04,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:04,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:05,741 INFO L124 PetriNetUnfolderBase]: 3137/5102 cut-off events. [2024-06-21 20:40:05,742 INFO L125 PetriNetUnfolderBase]: For 627104/627104 co-relation queries the response was YES. [2024-06-21 20:40:05,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43178 conditions, 5102 events. 3137/5102 cut-off events. For 627104/627104 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31302 event pairs, 841 based on Foata normal form. 1/5048 useless extension candidates. Maximal degree in co-relation 43068. Up to 4657 conditions per place. [2024-06-21 20:40:05,794 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2024-06-21 20:40:05,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 280 transitions, 3292 flow [2024-06-21 20:40:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:40:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:40:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:40:05,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 20:40:05,795 INFO L175 Difference]: Start difference. First operand has 225 places, 266 transitions, 2736 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:40:05,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 280 transitions, 3292 flow [2024-06-21 20:40:06,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 280 transitions, 3199 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-21 20:40:06,452 INFO L231 Difference]: Finished difference. Result has 230 places, 266 transitions, 2734 flow [2024-06-21 20:40:06,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2643, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2734, PETRI_PLACES=230, PETRI_TRANSITIONS=266} [2024-06-21 20:40:06,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-21 20:40:06,452 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 266 transitions, 2734 flow [2024-06-21 20:40:06,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:40:06,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:06,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:06,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:40:06,453 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)] === [2024-06-21 20:40:06,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:06,453 INFO L85 PathProgramCache]: Analyzing trace with hash 70174585, now seen corresponding path program 5 times [2024-06-21 20:40:06,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:06,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910723789] [2024-06-21 20:40:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:06,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:07,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:07,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910723789] [2024-06-21 20:40:07,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910723789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:07,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:07,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:40:07,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306988885] [2024-06-21 20:40:07,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:07,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:40:07,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:07,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:40:07,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:40:07,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:07,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 266 transitions, 2734 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:40:07,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:07,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:07,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:08,194 INFO L124 PetriNetUnfolderBase]: 3142/5109 cut-off events. [2024-06-21 20:40:08,195 INFO L125 PetriNetUnfolderBase]: For 642929/642929 co-relation queries the response was YES. [2024-06-21 20:40:08,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43452 conditions, 5109 events. 3142/5109 cut-off events. For 642929/642929 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31336 event pairs, 841 based on Foata normal form. 1/5055 useless extension candidates. Maximal degree in co-relation 43340. Up to 4646 conditions per place. [2024-06-21 20:40:08,242 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 209 selfloop transitions, 48 changer transitions 0/280 dead transitions. [2024-06-21 20:40:08,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 280 transitions, 3328 flow [2024-06-21 20:40:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:40:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:40:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:40:08,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 20:40:08,243 INFO L175 Difference]: Start difference. First operand has 230 places, 266 transitions, 2734 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:40:08,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 280 transitions, 3328 flow [2024-06-21 20:40:08,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 280 transitions, 3187 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:08,855 INFO L231 Difference]: Finished difference. Result has 230 places, 269 transitions, 2751 flow [2024-06-21 20:40:08,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2751, PETRI_PLACES=230, PETRI_TRANSITIONS=269} [2024-06-21 20:40:08,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-21 20:40:08,856 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 269 transitions, 2751 flow [2024-06-21 20:40:08,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:40:08,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:08,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:08,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:40:08,856 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)] === [2024-06-21 20:40:08,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash 616838415, now seen corresponding path program 6 times [2024-06-21 20:40:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:08,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176292303] [2024-06-21 20:40:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:09,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:09,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176292303] [2024-06-21 20:40:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176292303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:09,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:09,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:09,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504358598] [2024-06-21 20:40:09,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:09,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:09,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:09,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:09,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 269 transitions, 2751 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:40:09,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:09,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:09,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:10,672 INFO L124 PetriNetUnfolderBase]: 3147/5121 cut-off events. [2024-06-21 20:40:10,672 INFO L125 PetriNetUnfolderBase]: For 643204/643207 co-relation queries the response was YES. [2024-06-21 20:40:10,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43507 conditions, 5121 events. 3147/5121 cut-off events. For 643204/643207 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31450 event pairs, 854 based on Foata normal form. 3/5064 useless extension candidates. Maximal degree in co-relation 43394. Up to 4593 conditions per place. [2024-06-21 20:40:10,720 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 192 selfloop transitions, 67 changer transitions 0/282 dead transitions. [2024-06-21 20:40:10,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 282 transitions, 3501 flow [2024-06-21 20:40:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:40:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:40:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:40:10,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:40:10,721 INFO L175 Difference]: Start difference. First operand has 230 places, 269 transitions, 2751 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:40:10,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 282 transitions, 3501 flow [2024-06-21 20:40:11,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 282 transitions, 3375 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:40:11,245 INFO L231 Difference]: Finished difference. Result has 232 places, 272 transitions, 2821 flow [2024-06-21 20:40:11,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2821, PETRI_PLACES=232, PETRI_TRANSITIONS=272} [2024-06-21 20:40:11,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-21 20:40:11,245 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 272 transitions, 2821 flow [2024-06-21 20:40:11,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:40:11,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:11,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:11,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:40:11,246 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)] === [2024-06-21 20:40:11,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:11,246 INFO L85 PathProgramCache]: Analyzing trace with hash 611124495, now seen corresponding path program 7 times [2024-06-21 20:40:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:11,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661101423] [2024-06-21 20:40:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:12,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:12,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661101423] [2024-06-21 20:40:12,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661101423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:12,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:12,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:40:12,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943468317] [2024-06-21 20:40:12,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:12,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:40:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:40:12,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:40:12,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:12,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 272 transitions, 2821 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:40:12,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:12,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:12,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:13,009 INFO L124 PetriNetUnfolderBase]: 3139/5109 cut-off events. [2024-06-21 20:40:13,009 INFO L125 PetriNetUnfolderBase]: For 656288/656291 co-relation queries the response was YES. [2024-06-21 20:40:13,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43512 conditions, 5109 events. 3139/5109 cut-off events. For 656288/656291 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31389 event pairs, 852 based on Foata normal form. 4/5053 useless extension candidates. Maximal degree in co-relation 43398. Up to 4585 conditions per place. [2024-06-21 20:40:13,065 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 195 selfloop transitions, 63 changer transitions 0/281 dead transitions. [2024-06-21 20:40:13,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 281 transitions, 3361 flow [2024-06-21 20:40:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:40:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:40:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:40:13,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 20:40:13,066 INFO L175 Difference]: Start difference. First operand has 232 places, 272 transitions, 2821 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:40:13,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 281 transitions, 3361 flow [2024-06-21 20:40:13,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 281 transitions, 3166 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 20:40:13,705 INFO L231 Difference]: Finished difference. Result has 235 places, 272 transitions, 2760 flow [2024-06-21 20:40:13,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2760, PETRI_PLACES=235, PETRI_TRANSITIONS=272} [2024-06-21 20:40:13,705 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 20:40:13,705 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 272 transitions, 2760 flow [2024-06-21 20:40:13,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:40:13,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:13,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:13,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:40:13,706 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:13,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:13,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1357996962, now seen corresponding path program 1 times [2024-06-21 20:40:13,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:13,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14064135] [2024-06-21 20:40:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:13,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:14,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:14,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14064135] [2024-06-21 20:40:14,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14064135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:14,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:14,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:14,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122860764] [2024-06-21 20:40:14,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:14,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:14,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:14,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:14,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 272 transitions, 2760 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) [2024-06-21 20:40:14,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:14,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:14,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:16,104 INFO L124 PetriNetUnfolderBase]: 3329/5318 cut-off events. [2024-06-21 20:40:16,104 INFO L125 PetriNetUnfolderBase]: For 676454/676454 co-relation queries the response was YES. [2024-06-21 20:40:16,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44827 conditions, 5318 events. 3329/5318 cut-off events. For 676454/676454 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31890 event pairs, 793 based on Foata normal form. 4/5302 useless extension candidates. Maximal degree in co-relation 44712. Up to 4665 conditions per place. [2024-06-21 20:40:16,153 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 217 selfloop transitions, 88 changer transitions 0/310 dead transitions. [2024-06-21 20:40:16,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 310 transitions, 3550 flow [2024-06-21 20:40:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:40:16,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:40:16,154 INFO L175 Difference]: Start difference. First operand has 235 places, 272 transitions, 2760 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:40:16,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 310 transitions, 3550 flow [2024-06-21 20:40:16,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 310 transitions, 3397 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:16,790 INFO L231 Difference]: Finished difference. Result has 239 places, 277 transitions, 2880 flow [2024-06-21 20:40:16,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2880, PETRI_PLACES=239, PETRI_TRANSITIONS=277} [2024-06-21 20:40:16,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-21 20:40:16,790 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 277 transitions, 2880 flow [2024-06-21 20:40:16,790 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) [2024-06-21 20:40:16,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:16,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:16,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:40:16,790 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:16,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:16,791 INFO L85 PathProgramCache]: Analyzing trace with hash -674250522, now seen corresponding path program 2 times [2024-06-21 20:40:16,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:16,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537657897] [2024-06-21 20:40:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:16,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:17,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:17,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537657897] [2024-06-21 20:40:17,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537657897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:17,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:17,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:17,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344964207] [2024-06-21 20:40:17,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:17,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:17,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:17,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:17,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 277 transitions, 2880 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) [2024-06-21 20:40:17,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:17,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:17,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:19,156 INFO L124 PetriNetUnfolderBase]: 3346/5346 cut-off events. [2024-06-21 20:40:19,156 INFO L125 PetriNetUnfolderBase]: For 697558/697558 co-relation queries the response was YES. [2024-06-21 20:40:19,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46022 conditions, 5346 events. 3346/5346 cut-off events. For 697558/697558 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32051 event pairs, 791 based on Foata normal form. 4/5332 useless extension candidates. Maximal degree in co-relation 45905. Up to 4692 conditions per place. [2024-06-21 20:40:19,206 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 224 selfloop transitions, 88 changer transitions 0/317 dead transitions. [2024-06-21 20:40:19,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 317 transitions, 3710 flow [2024-06-21 20:40:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:40:19,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:40:19,208 INFO L175 Difference]: Start difference. First operand has 239 places, 277 transitions, 2880 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:40:19,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 317 transitions, 3710 flow [2024-06-21 20:40:19,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 317 transitions, 3477 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:19,819 INFO L231 Difference]: Finished difference. Result has 243 places, 282 transitions, 2930 flow [2024-06-21 20:40:19,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2930, PETRI_PLACES=243, PETRI_TRANSITIONS=282} [2024-06-21 20:40:19,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-21 20:40:19,820 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 282 transitions, 2930 flow [2024-06-21 20:40:19,820 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) [2024-06-21 20:40:19,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:19,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:19,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:40:19,820 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:19,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1057896380, now seen corresponding path program 3 times [2024-06-21 20:40:19,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:19,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752149840] [2024-06-21 20:40:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:20,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:20,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752149840] [2024-06-21 20:40:20,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752149840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:20,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:20,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:20,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627656537] [2024-06-21 20:40:20,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:20,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:20,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:20,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:20,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:20,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:20,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 282 transitions, 2930 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) [2024-06-21 20:40:20,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:20,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:20,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:22,325 INFO L124 PetriNetUnfolderBase]: 3374/5391 cut-off events. [2024-06-21 20:40:22,325 INFO L125 PetriNetUnfolderBase]: For 717684/717684 co-relation queries the response was YES. [2024-06-21 20:40:22,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46899 conditions, 5391 events. 3374/5391 cut-off events. For 717684/717684 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32375 event pairs, 793 based on Foata normal form. 4/5375 useless extension candidates. Maximal degree in co-relation 46780. Up to 4726 conditions per place. [2024-06-21 20:40:22,378 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 217 selfloop transitions, 102 changer transitions 0/324 dead transitions. [2024-06-21 20:40:22,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 324 transitions, 3818 flow [2024-06-21 20:40:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:40:22,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:40:22,380 INFO L175 Difference]: Start difference. First operand has 243 places, 282 transitions, 2930 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:40:22,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 324 transitions, 3818 flow [2024-06-21 20:40:23,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 324 transitions, 3567 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:23,097 INFO L231 Difference]: Finished difference. Result has 247 places, 293 transitions, 3068 flow [2024-06-21 20:40:23,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3068, PETRI_PLACES=247, PETRI_TRANSITIONS=293} [2024-06-21 20:40:23,097 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-21 20:40:23,097 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 293 transitions, 3068 flow [2024-06-21 20:40:23,098 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) [2024-06-21 20:40:23,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:23,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:23,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:40:23,098 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:23,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1047420860, now seen corresponding path program 4 times [2024-06-21 20:40:23,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:23,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771953422] [2024-06-21 20:40:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:24,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:24,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771953422] [2024-06-21 20:40:24,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771953422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:24,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:24,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:24,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384724385] [2024-06-21 20:40:24,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:24,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:24,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:24,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:24,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 293 transitions, 3068 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) [2024-06-21 20:40:24,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:24,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:24,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:25,689 INFO L124 PetriNetUnfolderBase]: 3407/5460 cut-off events. [2024-06-21 20:40:25,690 INFO L125 PetriNetUnfolderBase]: For 727631/727631 co-relation queries the response was YES. [2024-06-21 20:40:25,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47374 conditions, 5460 events. 3407/5460 cut-off events. For 727631/727631 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33033 event pairs, 625 based on Foata normal form. 4/5444 useless extension candidates. Maximal degree in co-relation 47253. Up to 4574 conditions per place. [2024-06-21 20:40:25,752 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 217 selfloop transitions, 113 changer transitions 0/335 dead transitions. [2024-06-21 20:40:25,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 335 transitions, 4268 flow [2024-06-21 20:40:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 20:40:25,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 20:40:25,753 INFO L175 Difference]: Start difference. First operand has 247 places, 293 transitions, 3068 flow. Second operand 10 states and 202 transitions. [2024-06-21 20:40:25,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 335 transitions, 4268 flow [2024-06-21 20:40:26,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 335 transitions, 4033 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 20:40:26,631 INFO L231 Difference]: Finished difference. Result has 253 places, 298 transitions, 3247 flow [2024-06-21 20:40:26,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3247, PETRI_PLACES=253, PETRI_TRANSITIONS=298} [2024-06-21 20:40:26,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-21 20:40:26,631 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 298 transitions, 3247 flow [2024-06-21 20:40:26,631 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) [2024-06-21 20:40:26,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:26,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:26,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:40:26,632 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:26,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:26,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1342996250, now seen corresponding path program 5 times [2024-06-21 20:40:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:26,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062156547] [2024-06-21 20:40:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:26,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:27,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062156547] [2024-06-21 20:40:27,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062156547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:27,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:27,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:40:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942850518] [2024-06-21 20:40:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:27,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:40:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:40:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:40:27,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:40:27,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 298 transitions, 3247 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) [2024-06-21 20:40:27,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:27,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:40:27,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:29,073 INFO L124 PetriNetUnfolderBase]: 3399/5448 cut-off events. [2024-06-21 20:40:29,073 INFO L125 PetriNetUnfolderBase]: For 733894/733894 co-relation queries the response was YES. [2024-06-21 20:40:29,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46653 conditions, 5448 events. 3399/5448 cut-off events. For 733894/733894 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32956 event pairs, 800 based on Foata normal form. 4/5432 useless extension candidates. Maximal degree in co-relation 46530. Up to 4773 conditions per place. [2024-06-21 20:40:29,139 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 225 selfloop transitions, 100 changer transitions 0/330 dead transitions. [2024-06-21 20:40:29,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 330 transitions, 4002 flow [2024-06-21 20:40:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:40:29,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:40:29,140 INFO L175 Difference]: Start difference. First operand has 253 places, 298 transitions, 3247 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:40:29,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 330 transitions, 4002 flow [2024-06-21 20:40:29,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 330 transitions, 3702 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:29,983 INFO L231 Difference]: Finished difference. Result has 257 places, 299 transitions, 3177 flow [2024-06-21 20:40:29,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3177, PETRI_PLACES=257, PETRI_TRANSITIONS=299} [2024-06-21 20:40:29,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-21 20:40:29,984 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 299 transitions, 3177 flow [2024-06-21 20:40:29,984 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) [2024-06-21 20:40:29,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:29,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:29,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:40:29,984 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)] === [2024-06-21 20:40:29,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1300521350, now seen corresponding path program 4 times [2024-06-21 20:40:29,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:29,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112253880] [2024-06-21 20:40:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:29,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:31,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:31,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112253880] [2024-06-21 20:40:31,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112253880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:31,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:31,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:31,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689715268] [2024-06-21 20:40:31,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:31,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:31,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:31,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:31,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 299 transitions, 3177 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:31,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:31,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:31,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:32,164 INFO L124 PetriNetUnfolderBase]: 3236/5282 cut-off events. [2024-06-21 20:40:32,164 INFO L125 PetriNetUnfolderBase]: For 745992/745995 co-relation queries the response was YES. [2024-06-21 20:40:32,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45641 conditions, 5282 events. 3236/5282 cut-off events. For 745992/745995 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32775 event pairs, 757 based on Foata normal form. 4/5226 useless extension candidates. Maximal degree in co-relation 45516. Up to 4737 conditions per place. [2024-06-21 20:40:32,223 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 69 changer transitions 0/313 dead transitions. [2024-06-21 20:40:32,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 313 transitions, 3871 flow [2024-06-21 20:40:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:40:32,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:32,224 INFO L175 Difference]: Start difference. First operand has 257 places, 299 transitions, 3177 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:40:32,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 313 transitions, 3871 flow [2024-06-21 20:40:33,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 313 transitions, 3644 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:33,109 INFO L231 Difference]: Finished difference. Result has 258 places, 303 transitions, 3191 flow [2024-06-21 20:40:33,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3191, PETRI_PLACES=258, PETRI_TRANSITIONS=303} [2024-06-21 20:40:33,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-21 20:40:33,109 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 303 transitions, 3191 flow [2024-06-21 20:40:33,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:33,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:33,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:33,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:40:33,110 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)] === [2024-06-21 20:40:33,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:33,110 INFO L85 PathProgramCache]: Analyzing trace with hash 611133950, now seen corresponding path program 5 times [2024-06-21 20:40:33,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:33,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950760702] [2024-06-21 20:40:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:33,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:34,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950760702] [2024-06-21 20:40:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950760702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:34,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199510837] [2024-06-21 20:40:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:34,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:34,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:34,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 303 transitions, 3191 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:34,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:34,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:34,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:35,239 INFO L124 PetriNetUnfolderBase]: 3264/5326 cut-off events. [2024-06-21 20:40:35,239 INFO L125 PetriNetUnfolderBase]: For 768485/768488 co-relation queries the response was YES. [2024-06-21 20:40:35,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46567 conditions, 5326 events. 3264/5326 cut-off events. For 768485/768488 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33105 event pairs, 759 based on Foata normal form. 4/5270 useless extension candidates. Maximal degree in co-relation 46441. Up to 4748 conditions per place. [2024-06-21 20:40:35,300 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 226 selfloop transitions, 73 changer transitions 0/322 dead transitions. [2024-06-21 20:40:35,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 322 transitions, 4171 flow [2024-06-21 20:40:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:40:35,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:40:35,301 INFO L175 Difference]: Start difference. First operand has 258 places, 303 transitions, 3191 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:40:35,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 322 transitions, 4171 flow [2024-06-21 20:40:36,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 322 transitions, 3958 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:36,142 INFO L231 Difference]: Finished difference. Result has 261 places, 311 transitions, 3345 flow [2024-06-21 20:40:36,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3345, PETRI_PLACES=261, PETRI_TRANSITIONS=311} [2024-06-21 20:40:36,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-21 20:40:36,142 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 311 transitions, 3345 flow [2024-06-21 20:40:36,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:36,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:36,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:36,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:40:36,143 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)] === [2024-06-21 20:40:36,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:36,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1315771955, now seen corresponding path program 2 times [2024-06-21 20:40:36,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:36,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211951517] [2024-06-21 20:40:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:36,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:37,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:37,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211951517] [2024-06-21 20:40:37,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211951517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:37,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:37,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:37,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109577298] [2024-06-21 20:40:37,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:37,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:37,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:37,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 311 transitions, 3345 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:37,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:37,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:37,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:38,348 INFO L124 PetriNetUnfolderBase]: 3274/5340 cut-off events. [2024-06-21 20:40:38,348 INFO L125 PetriNetUnfolderBase]: For 794185/794185 co-relation queries the response was YES. [2024-06-21 20:40:38,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47515 conditions, 5340 events. 3274/5340 cut-off events. For 794185/794185 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33106 event pairs, 728 based on Foata normal form. 2/5291 useless extension candidates. Maximal degree in co-relation 47387. Up to 4961 conditions per place. [2024-06-21 20:40:38,411 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 285 selfloop transitions, 18 changer transitions 0/326 dead transitions. [2024-06-21 20:40:38,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 326 transitions, 4069 flow [2024-06-21 20:40:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:40:38,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 20:40:38,412 INFO L175 Difference]: Start difference. First operand has 261 places, 311 transitions, 3345 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:40:38,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 326 transitions, 4069 flow [2024-06-21 20:40:39,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 326 transitions, 3879 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 20:40:39,050 INFO L231 Difference]: Finished difference. Result has 265 places, 314 transitions, 3291 flow [2024-06-21 20:40:39,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3291, PETRI_PLACES=265, PETRI_TRANSITIONS=314} [2024-06-21 20:40:39,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-21 20:40:39,051 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 314 transitions, 3291 flow [2024-06-21 20:40:39,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:39,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:39,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:39,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:40:39,051 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)] === [2024-06-21 20:40:39,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1300534835, now seen corresponding path program 3 times [2024-06-21 20:40:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:39,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295681588] [2024-06-21 20:40:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:40,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295681588] [2024-06-21 20:40:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295681588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:40,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:40,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:40,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95799803] [2024-06-21 20:40:40,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:40,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:40,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 314 transitions, 3291 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:40,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:40,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:40,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:41,222 INFO L124 PetriNetUnfolderBase]: 3284/5355 cut-off events. [2024-06-21 20:40:41,222 INFO L125 PetriNetUnfolderBase]: For 811673/811676 co-relation queries the response was YES. [2024-06-21 20:40:41,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48035 conditions, 5355 events. 3284/5355 cut-off events. For 811673/811676 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33224 event pairs, 736 based on Foata normal form. 4/5307 useless extension candidates. Maximal degree in co-relation 47905. Up to 4962 conditions per place. [2024-06-21 20:40:41,285 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 284 selfloop transitions, 22 changer transitions 0/329 dead transitions. [2024-06-21 20:40:41,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 329 transitions, 4032 flow [2024-06-21 20:40:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:40:41,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 20:40:41,286 INFO L175 Difference]: Start difference. First operand has 265 places, 314 transitions, 3291 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:40:41,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 329 transitions, 4032 flow [2024-06-21 20:40:42,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 329 transitions, 3888 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:42,198 INFO L231 Difference]: Finished difference. Result has 266 places, 317 transitions, 3297 flow [2024-06-21 20:40:42,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3297, PETRI_PLACES=266, PETRI_TRANSITIONS=317} [2024-06-21 20:40:42,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-21 20:40:42,199 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 317 transitions, 3297 flow [2024-06-21 20:40:42,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:42,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:42,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:42,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:40:42,199 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)] === [2024-06-21 20:40:42,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 625866545, now seen corresponding path program 4 times [2024-06-21 20:40:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:42,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820031274] [2024-06-21 20:40:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:42,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:43,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820031274] [2024-06-21 20:40:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820031274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:43,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:43,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364788595] [2024-06-21 20:40:43,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:43,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:43,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 317 transitions, 3297 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:43,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:43,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:43,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:44,332 INFO L124 PetriNetUnfolderBase]: 3278/5347 cut-off events. [2024-06-21 20:40:44,332 INFO L125 PetriNetUnfolderBase]: For 820746/820749 co-relation queries the response was YES. [2024-06-21 20:40:44,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48092 conditions, 5347 events. 3278/5347 cut-off events. For 820746/820749 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 33215 event pairs, 733 based on Foata normal form. 4/5299 useless extension candidates. Maximal degree in co-relation 47962. Up to 4919 conditions per place. [2024-06-21 20:40:44,388 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 272 selfloop transitions, 39 changer transitions 0/334 dead transitions. [2024-06-21 20:40:44,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 334 transitions, 4058 flow [2024-06-21 20:40:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:40:44,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:40:44,389 INFO L175 Difference]: Start difference. First operand has 266 places, 317 transitions, 3297 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:40:44,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 334 transitions, 4058 flow [2024-06-21 20:40:45,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 334 transitions, 3930 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:45,218 INFO L231 Difference]: Finished difference. Result has 268 places, 320 transitions, 3359 flow [2024-06-21 20:40:45,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3359, PETRI_PLACES=268, PETRI_TRANSITIONS=320} [2024-06-21 20:40:45,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-21 20:40:45,219 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 320 transitions, 3359 flow [2024-06-21 20:40:45,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:45,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:45,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:45,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:40:45,219 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)] === [2024-06-21 20:40:45,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1315266500, now seen corresponding path program 6 times [2024-06-21 20:40:45,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:45,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311179987] [2024-06-21 20:40:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:45,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:46,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:46,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311179987] [2024-06-21 20:40:46,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311179987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:46,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:46,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:46,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168182243] [2024-06-21 20:40:46,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:46,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:46,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:46,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:46,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:46,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:46,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 320 transitions, 3359 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:46,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:46,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:46,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:47,298 INFO L124 PetriNetUnfolderBase]: 3282/5353 cut-off events. [2024-06-21 20:40:47,299 INFO L125 PetriNetUnfolderBase]: For 832104/832107 co-relation queries the response was YES. [2024-06-21 20:40:47,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48446 conditions, 5353 events. 3282/5353 cut-off events. For 832104/832107 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33265 event pairs, 755 based on Foata normal form. 4/5297 useless extension candidates. Maximal degree in co-relation 48315. Up to 4692 conditions per place. [2024-06-21 20:40:47,365 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 225 selfloop transitions, 99 changer transitions 0/347 dead transitions. [2024-06-21 20:40:47,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 347 transitions, 4639 flow [2024-06-21 20:40:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:40:47,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:40:47,366 INFO L175 Difference]: Start difference. First operand has 268 places, 320 transitions, 3359 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:40:47,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 347 transitions, 4639 flow [2024-06-21 20:40:48,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 347 transitions, 4471 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:48,548 INFO L231 Difference]: Finished difference. Result has 272 places, 335 transitions, 3731 flow [2024-06-21 20:40:48,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3731, PETRI_PLACES=272, PETRI_TRANSITIONS=335} [2024-06-21 20:40:48,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-21 20:40:48,548 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 335 transitions, 3731 flow [2024-06-21 20:40:48,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:48,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:48,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:48,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:40:48,549 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)] === [2024-06-21 20:40:48,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1922191665, now seen corresponding path program 1 times [2024-06-21 20:40:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:48,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788476183] [2024-06-21 20:40:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:48,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:49,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:49,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788476183] [2024-06-21 20:40:49,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788476183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:49,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:49,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001819404] [2024-06-21 20:40:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:49,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:49,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:49,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:49,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 335 transitions, 3731 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:49,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:49,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:49,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:50,437 INFO L124 PetriNetUnfolderBase]: 3362/5480 cut-off events. [2024-06-21 20:40:50,437 INFO L125 PetriNetUnfolderBase]: For 858834/858834 co-relation queries the response was YES. [2024-06-21 20:40:50,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49922 conditions, 5480 events. 3362/5480 cut-off events. For 858834/858834 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33880 event pairs, 732 based on Foata normal form. 2/5479 useless extension candidates. Maximal degree in co-relation 49788. Up to 5046 conditions per place. [2024-06-21 20:40:50,503 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 317 selfloop transitions, 21 changer transitions 0/358 dead transitions. [2024-06-21 20:40:50,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 358 transitions, 4529 flow [2024-06-21 20:40:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:40:50,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:50,504 INFO L175 Difference]: Start difference. First operand has 272 places, 335 transitions, 3731 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:40:50,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 358 transitions, 4529 flow [2024-06-21 20:40:51,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 358 transitions, 4311 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-21 20:40:51,535 INFO L231 Difference]: Finished difference. Result has 277 places, 338 transitions, 3627 flow [2024-06-21 20:40:51,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3627, PETRI_PLACES=277, PETRI_TRANSITIONS=338} [2024-06-21 20:40:51,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-21 20:40:51,536 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 338 transitions, 3627 flow [2024-06-21 20:40:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:51,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:51,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:40:51,536 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)] === [2024-06-21 20:40:51,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1879780593, now seen corresponding path program 2 times [2024-06-21 20:40:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:51,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143661196] [2024-06-21 20:40:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:51,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:52,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:52,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143661196] [2024-06-21 20:40:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143661196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:52,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:52,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:52,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570936056] [2024-06-21 20:40:52,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:52,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:52,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:52,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:52,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:52,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 338 transitions, 3627 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:52,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:52,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:52,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:53,485 INFO L124 PetriNetUnfolderBase]: 3372/5506 cut-off events. [2024-06-21 20:40:53,485 INFO L125 PetriNetUnfolderBase]: For 871667/871667 co-relation queries the response was YES. [2024-06-21 20:40:53,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49779 conditions, 5506 events. 3372/5506 cut-off events. For 871667/871667 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34133 event pairs, 742 based on Foata normal form. 2/5505 useless extension candidates. Maximal degree in co-relation 49643. Up to 5051 conditions per place. [2024-06-21 20:40:53,553 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 313 selfloop transitions, 26 changer transitions 0/359 dead transitions. [2024-06-21 20:40:53,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 359 transitions, 4427 flow [2024-06-21 20:40:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:40:53,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:40:53,554 INFO L175 Difference]: Start difference. First operand has 277 places, 338 transitions, 3627 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:40:53,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 359 transitions, 4427 flow [2024-06-21 20:40:54,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 359 transitions, 4335 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:54,444 INFO L231 Difference]: Finished difference. Result has 279 places, 341 transitions, 3665 flow [2024-06-21 20:40:54,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3665, PETRI_PLACES=279, PETRI_TRANSITIONS=341} [2024-06-21 20:40:54,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-21 20:40:54,445 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 341 transitions, 3665 flow [2024-06-21 20:40:54,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:54,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:54,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:54,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:40:54,445 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)] === [2024-06-21 20:40:54,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash 64618548, now seen corresponding path program 1 times [2024-06-21 20:40:54,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:54,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566412264] [2024-06-21 20:40:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:54,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:55,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:55,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566412264] [2024-06-21 20:40:55,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566412264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:55,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:55,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:55,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948902875] [2024-06-21 20:40:55,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:55,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:55,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:55,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 341 transitions, 3665 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:55,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:55,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:55,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:56,547 INFO L124 PetriNetUnfolderBase]: 3382/5512 cut-off events. [2024-06-21 20:40:56,547 INFO L125 PetriNetUnfolderBase]: For 894757/894757 co-relation queries the response was YES. [2024-06-21 20:40:56,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50449 conditions, 5512 events. 3382/5512 cut-off events. For 894757/894757 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34119 event pairs, 731 based on Foata normal form. 3/5512 useless extension candidates. Maximal degree in co-relation 50312. Up to 5080 conditions per place. [2024-06-21 20:40:56,613 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 21 changer transitions 0/361 dead transitions. [2024-06-21 20:40:56,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 361 transitions, 4465 flow [2024-06-21 20:40:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:40:56,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:40:56,614 INFO L175 Difference]: Start difference. First operand has 279 places, 341 transitions, 3665 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:40:56,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 361 transitions, 4465 flow [2024-06-21 20:40:57,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 361 transitions, 4357 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:57,669 INFO L231 Difference]: Finished difference. Result has 281 places, 344 transitions, 3679 flow [2024-06-21 20:40:57,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3679, PETRI_PLACES=281, PETRI_TRANSITIONS=344} [2024-06-21 20:40:57,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-21 20:40:57,670 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 344 transitions, 3679 flow [2024-06-21 20:40:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:57,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:57,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:57,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:40:57,670 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)] === [2024-06-21 20:40:57,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1885344783, now seen corresponding path program 3 times [2024-06-21 20:40:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:57,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366482996] [2024-06-21 20:40:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:58,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:58,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366482996] [2024-06-21 20:40:58,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366482996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:58,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:58,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:40:58,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156341460] [2024-06-21 20:40:58,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:58,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:40:58,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:58,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:40:58,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:40:58,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:40:58,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 344 transitions, 3679 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:58,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:58,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:40:58,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:59,702 INFO L124 PetriNetUnfolderBase]: 3392/5538 cut-off events. [2024-06-21 20:40:59,702 INFO L125 PetriNetUnfolderBase]: For 908534/908534 co-relation queries the response was YES. [2024-06-21 20:40:59,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50972 conditions, 5538 events. 3392/5538 cut-off events. For 908534/908534 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34381 event pairs, 741 based on Foata normal form. 2/5537 useless extension candidates. Maximal degree in co-relation 50834. Up to 5065 conditions per place. [2024-06-21 20:40:59,763 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 311 selfloop transitions, 32 changer transitions 0/363 dead transitions. [2024-06-21 20:40:59,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 363 transitions, 4489 flow [2024-06-21 20:40:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:40:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:40:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:40:59,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:40:59,764 INFO L175 Difference]: Start difference. First operand has 281 places, 344 transitions, 3679 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:40:59,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 363 transitions, 4489 flow [2024-06-21 20:41:00,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 363 transitions, 4389 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:00,816 INFO L231 Difference]: Finished difference. Result has 283 places, 347 transitions, 3729 flow [2024-06-21 20:41:00,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3729, PETRI_PLACES=283, PETRI_TRANSITIONS=347} [2024-06-21 20:41:00,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-21 20:41:00,817 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 347 transitions, 3729 flow [2024-06-21 20:41:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:00,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:00,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:00,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:41:00,818 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)] === [2024-06-21 20:41:00,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash 360346058, now seen corresponding path program 2 times [2024-06-21 20:41:00,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:00,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077458794] [2024-06-21 20:41:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:00,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:01,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077458794] [2024-06-21 20:41:01,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077458794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:01,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:01,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:01,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741795701] [2024-06-21 20:41:01,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:01,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:01,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:01,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:01,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:01,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:01,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 347 transitions, 3729 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:01,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:01,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:01,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:02,970 INFO L124 PetriNetUnfolderBase]: 3402/5544 cut-off events. [2024-06-21 20:41:02,970 INFO L125 PetriNetUnfolderBase]: For 932826/932826 co-relation queries the response was YES. [2024-06-21 20:41:03,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51670 conditions, 5544 events. 3402/5544 cut-off events. For 932826/932826 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34328 event pairs, 731 based on Foata normal form. 3/5544 useless extension candidates. Maximal degree in co-relation 51531. Up to 5100 conditions per place. [2024-06-21 20:41:03,042 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 25 changer transitions 0/365 dead transitions. [2024-06-21 20:41:03,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 365 transitions, 4539 flow [2024-06-21 20:41:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:41:03,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 20:41:03,043 INFO L175 Difference]: Start difference. First operand has 283 places, 347 transitions, 3729 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:41:03,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 365 transitions, 4539 flow [2024-06-21 20:41:04,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 365 transitions, 4411 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:04,232 INFO L231 Difference]: Finished difference. Result has 285 places, 350 transitions, 3739 flow [2024-06-21 20:41:04,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3739, PETRI_PLACES=285, PETRI_TRANSITIONS=350} [2024-06-21 20:41:04,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-21 20:41:04,233 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 350 transitions, 3739 flow [2024-06-21 20:41:04,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:04,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:04,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:04,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:41:04,233 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)] === [2024-06-21 20:41:04,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1885352440, now seen corresponding path program 3 times [2024-06-21 20:41:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855394166] [2024-06-21 20:41:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855394166] [2024-06-21 20:41:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855394166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:05,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:05,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701197837] [2024-06-21 20:41:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:05,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:05,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:05,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 350 transitions, 3739 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:05,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:05,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:05,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:06,337 INFO L124 PetriNetUnfolderBase]: 3412/5570 cut-off events. [2024-06-21 20:41:06,337 INFO L125 PetriNetUnfolderBase]: For 951188/951188 co-relation queries the response was YES. [2024-06-21 20:41:06,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52183 conditions, 5570 events. 3412/5570 cut-off events. For 951188/951188 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34585 event pairs, 741 based on Foata normal form. 3/5570 useless extension candidates. Maximal degree in co-relation 52043. Up to 5092 conditions per place. [2024-06-21 20:41:06,410 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 314 selfloop transitions, 35 changer transitions 0/369 dead transitions. [2024-06-21 20:41:06,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 369 transitions, 4565 flow [2024-06-21 20:41:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:41:06,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:41:06,411 INFO L175 Difference]: Start difference. First operand has 285 places, 350 transitions, 3739 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:41:06,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 369 transitions, 4565 flow [2024-06-21 20:41:07,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 369 transitions, 4449 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:07,874 INFO L231 Difference]: Finished difference. Result has 287 places, 353 transitions, 3788 flow [2024-06-21 20:41:07,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3788, PETRI_PLACES=287, PETRI_TRANSITIONS=353} [2024-06-21 20:41:07,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-21 20:41:07,875 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 353 transitions, 3788 flow [2024-06-21 20:41:07,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:07,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:07,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:07,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:41:07,875 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)] === [2024-06-21 20:41:07,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash 616846351, now seen corresponding path program 4 times [2024-06-21 20:41:07,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:07,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929484955] [2024-06-21 20:41:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:07,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:08,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929484955] [2024-06-21 20:41:08,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929484955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:08,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:08,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:08,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127981761] [2024-06-21 20:41:08,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:08,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:08,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:08,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:08,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 353 transitions, 3788 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:08,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:08,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:08,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:09,899 INFO L124 PetriNetUnfolderBase]: 3414/5576 cut-off events. [2024-06-21 20:41:09,899 INFO L125 PetriNetUnfolderBase]: For 961038/961038 co-relation queries the response was YES. [2024-06-21 20:41:09,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52535 conditions, 5576 events. 3414/5576 cut-off events. For 961038/961038 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34663 event pairs, 751 based on Foata normal form. 2/5572 useless extension candidates. Maximal degree in co-relation 52394. Up to 5081 conditions per place. [2024-06-21 20:41:09,973 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 41 changer transitions 0/369 dead transitions. [2024-06-21 20:41:09,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 369 transitions, 4610 flow [2024-06-21 20:41:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:41:09,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:41:09,974 INFO L175 Difference]: Start difference. First operand has 287 places, 353 transitions, 3788 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:41:09,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 369 transitions, 4610 flow [2024-06-21 20:41:11,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 369 transitions, 4469 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:11,635 INFO L231 Difference]: Finished difference. Result has 289 places, 356 transitions, 3825 flow [2024-06-21 20:41:11,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3825, PETRI_PLACES=289, PETRI_TRANSITIONS=356} [2024-06-21 20:41:11,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-21 20:41:11,635 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 356 transitions, 3825 flow [2024-06-21 20:41:11,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:11,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:11,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:11,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:41:11,636 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)] === [2024-06-21 20:41:11,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 616846568, now seen corresponding path program 4 times [2024-06-21 20:41:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:11,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638759806] [2024-06-21 20:41:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:12,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:12,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638759806] [2024-06-21 20:41:12,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638759806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:12,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:12,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:12,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959167331] [2024-06-21 20:41:12,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:12,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:12,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:12,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:12,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 356 transitions, 3825 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:12,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:12,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:12,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:13,923 INFO L124 PetriNetUnfolderBase]: 3429/5597 cut-off events. [2024-06-21 20:41:13,923 INFO L125 PetriNetUnfolderBase]: For 986006/986006 co-relation queries the response was YES. [2024-06-21 20:41:13,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53295 conditions, 5597 events. 3429/5597 cut-off events. For 986006/986006 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34795 event pairs, 748 based on Foata normal form. 3/5594 useless extension candidates. Maximal degree in co-relation 53153. Up to 5127 conditions per place. [2024-06-21 20:41:13,996 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 319 selfloop transitions, 32 changer transitions 0/371 dead transitions. [2024-06-21 20:41:13,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 371 transitions, 4651 flow [2024-06-21 20:41:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:41:13,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 20:41:13,997 INFO L175 Difference]: Start difference. First operand has 289 places, 356 transitions, 3825 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:41:13,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 371 transitions, 4651 flow [2024-06-21 20:41:15,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 371 transitions, 4495 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:15,909 INFO L231 Difference]: Finished difference. Result has 291 places, 359 transitions, 3835 flow [2024-06-21 20:41:15,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3669, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3835, PETRI_PLACES=291, PETRI_TRANSITIONS=359} [2024-06-21 20:41:15,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-21 20:41:15,910 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 359 transitions, 3835 flow [2024-06-21 20:41:15,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:15,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:15,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:15,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:41:15,910 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)] === [2024-06-21 20:41:15,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash 616854008, now seen corresponding path program 5 times [2024-06-21 20:41:15,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:15,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154597649] [2024-06-21 20:41:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:15,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:16,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154597649] [2024-06-21 20:41:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154597649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:16,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:16,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:16,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604531661] [2024-06-21 20:41:16,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:16,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:16,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:17,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:17,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 359 transitions, 3835 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:17,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:17,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:17,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:18,180 INFO L124 PetriNetUnfolderBase]: 3444/5618 cut-off events. [2024-06-21 20:41:18,180 INFO L125 PetriNetUnfolderBase]: For 1005705/1005705 co-relation queries the response was YES. [2024-06-21 20:41:18,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53872 conditions, 5618 events. 3444/5618 cut-off events. For 1005705/1005705 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34959 event pairs, 748 based on Foata normal form. 3/5615 useless extension candidates. Maximal degree in co-relation 53729. Up to 5129 conditions per place. [2024-06-21 20:41:18,257 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 316 selfloop transitions, 39 changer transitions 0/375 dead transitions. [2024-06-21 20:41:18,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 375 transitions, 4677 flow [2024-06-21 20:41:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:41:18,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:41:18,258 INFO L175 Difference]: Start difference. First operand has 291 places, 359 transitions, 3835 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:41:18,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 375 transitions, 4677 flow [2024-06-21 20:41:19,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 375 transitions, 4533 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:19,896 INFO L231 Difference]: Finished difference. Result has 293 places, 362 transitions, 3878 flow [2024-06-21 20:41:19,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3878, PETRI_PLACES=293, PETRI_TRANSITIONS=362} [2024-06-21 20:41:19,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-21 20:41:19,897 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 362 transitions, 3878 flow [2024-06-21 20:41:19,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:19,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:19,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:19,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:41:19,897 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)] === [2024-06-21 20:41:19,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1125061614, now seen corresponding path program 6 times [2024-06-21 20:41:19,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404303016] [2024-06-21 20:41:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:19,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404303016] [2024-06-21 20:41:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404303016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:21,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:21,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:21,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581863968] [2024-06-21 20:41:21,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:21,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:21,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:21,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:21,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:21,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 362 transitions, 3878 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:21,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:21,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:21,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:22,177 INFO L124 PetriNetUnfolderBase]: 3438/5610 cut-off events. [2024-06-21 20:41:22,177 INFO L125 PetriNetUnfolderBase]: For 1009999/1009999 co-relation queries the response was YES. [2024-06-21 20:41:22,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53956 conditions, 5610 events. 3438/5610 cut-off events. For 1009999/1009999 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34876 event pairs, 743 based on Foata normal form. 2/5606 useless extension candidates. Maximal degree in co-relation 53812. Up to 5105 conditions per place. [2024-06-21 20:41:22,257 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 322 selfloop transitions, 54 changer transitions 0/396 dead transitions. [2024-06-21 20:41:22,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 396 transitions, 4909 flow [2024-06-21 20:41:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:41:22,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 20:41:22,258 INFO L175 Difference]: Start difference. First operand has 293 places, 362 transitions, 3878 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:41:22,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 396 transitions, 4909 flow [2024-06-21 20:41:24,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 396 transitions, 4671 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:24,451 INFO L231 Difference]: Finished difference. Result has 297 places, 383 transitions, 4056 flow [2024-06-21 20:41:24,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3715, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4056, PETRI_PLACES=297, PETRI_TRANSITIONS=383} [2024-06-21 20:41:24,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-21 20:41:24,452 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 383 transitions, 4056 flow [2024-06-21 20:41:24,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:24,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:24,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:24,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:41:24,452 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)] === [2024-06-21 20:41:24,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1315789811, now seen corresponding path program 1 times [2024-06-21 20:41:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173446962] [2024-06-21 20:41:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:25,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173446962] [2024-06-21 20:41:25,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173446962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:25,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:25,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739754608] [2024-06-21 20:41:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:25,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:26,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:26,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 383 transitions, 4056 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:26,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:26,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:26,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:27,239 INFO L124 PetriNetUnfolderBase]: 3386/5514 cut-off events. [2024-06-21 20:41:27,239 INFO L125 PetriNetUnfolderBase]: For 1018865/1018865 co-relation queries the response was YES. [2024-06-21 20:41:27,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53762 conditions, 5514 events. 3386/5514 cut-off events. For 1018865/1018865 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34193 event pairs, 733 based on Foata normal form. 2/5465 useless extension candidates. Maximal degree in co-relation 53615. Up to 5079 conditions per place. [2024-06-21 20:41:27,318 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 344 selfloop transitions, 20 changer transitions 0/398 dead transitions. [2024-06-21 20:41:27,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 398 transitions, 4919 flow [2024-06-21 20:41:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 20:41:27,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-21 20:41:27,319 INFO L175 Difference]: Start difference. First operand has 297 places, 383 transitions, 4056 flow. Second operand 9 states and 157 transitions. [2024-06-21 20:41:27,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 398 transitions, 4919 flow [2024-06-21 20:41:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 398 transitions, 4817 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 20:41:28,789 INFO L231 Difference]: Finished difference. Result has 304 places, 386 transitions, 4114 flow [2024-06-21 20:41:28,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4114, PETRI_PLACES=304, PETRI_TRANSITIONS=386} [2024-06-21 20:41:28,789 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-21 20:41:28,790 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 386 transitions, 4114 flow [2024-06-21 20:41:28,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:28,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:28,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:28,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:41:28,790 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)] === [2024-06-21 20:41:28,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash -203043823, now seen corresponding path program 1 times [2024-06-21 20:41:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:28,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189306937] [2024-06-21 20:41:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:28,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:29,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189306937] [2024-06-21 20:41:29,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189306937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:29,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:29,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773650191] [2024-06-21 20:41:29,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:29,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:29,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:29,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:29,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:29,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:29,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 386 transitions, 4114 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:29,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:29,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:29,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:30,939 INFO L124 PetriNetUnfolderBase]: 3403/5540 cut-off events. [2024-06-21 20:41:30,939 INFO L125 PetriNetUnfolderBase]: For 1050120/1050123 co-relation queries the response was YES. [2024-06-21 20:41:30,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54356 conditions, 5540 events. 3403/5540 cut-off events. For 1050120/1050123 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34363 event pairs, 579 based on Foata normal form. 6/5513 useless extension candidates. Maximal degree in co-relation 54206. Up to 4955 conditions per place. [2024-06-21 20:41:31,017 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 341 selfloop transitions, 41 changer transitions 0/416 dead transitions. [2024-06-21 20:41:31,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 416 transitions, 5071 flow [2024-06-21 20:41:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 20:41:31,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-21 20:41:31,018 INFO L175 Difference]: Start difference. First operand has 304 places, 386 transitions, 4114 flow. Second operand 8 states and 163 transitions. [2024-06-21 20:41:31,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 416 transitions, 5071 flow [2024-06-21 20:41:32,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 416 transitions, 4936 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:32,784 INFO L231 Difference]: Finished difference. Result has 306 places, 389 transitions, 4181 flow [2024-06-21 20:41:32,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=306, PETRI_TRANSITIONS=389} [2024-06-21 20:41:32,785 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-21 20:41:32,785 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 389 transitions, 4181 flow [2024-06-21 20:41:32,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:32,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:32,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:41:32,785 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)] === [2024-06-21 20:41:32,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash -192568303, now seen corresponding path program 2 times [2024-06-21 20:41:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:32,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915007294] [2024-06-21 20:41:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:32,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:33,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:33,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915007294] [2024-06-21 20:41:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915007294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:33,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:33,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:33,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028634738] [2024-06-21 20:41:33,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:33,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:33,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:33,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:33,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:33,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 389 transitions, 4181 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:33,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:33,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:33,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:35,007 INFO L124 PetriNetUnfolderBase]: 3419/5564 cut-off events. [2024-06-21 20:41:35,007 INFO L125 PetriNetUnfolderBase]: For 1070436/1070439 co-relation queries the response was YES. [2024-06-21 20:41:35,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55042 conditions, 5564 events. 3419/5564 cut-off events. For 1070436/1070439 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34667 event pairs, 733 based on Foata normal form. 6/5517 useless extension candidates. Maximal degree in co-relation 54891. Up to 5025 conditions per place. [2024-06-21 20:41:35,082 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 42 changer transitions 0/415 dead transitions. [2024-06-21 20:41:35,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 415 transitions, 5130 flow [2024-06-21 20:41:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:41:35,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 20:41:35,084 INFO L175 Difference]: Start difference. First operand has 306 places, 389 transitions, 4181 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:41:35,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 415 transitions, 5130 flow [2024-06-21 20:41:37,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 415 transitions, 4950 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:37,704 INFO L231 Difference]: Finished difference. Result has 308 places, 392 transitions, 4211 flow [2024-06-21 20:41:37,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4211, PETRI_PLACES=308, PETRI_TRANSITIONS=392} [2024-06-21 20:41:37,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-21 20:41:37,704 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 392 transitions, 4211 flow [2024-06-21 20:41:37,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:37,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:37,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:37,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:41:37,705 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)] === [2024-06-21 20:41:37,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash -630125839, now seen corresponding path program 1 times [2024-06-21 20:41:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:37,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013252266] [2024-06-21 20:41:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013252266] [2024-06-21 20:41:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013252266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:38,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:38,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:38,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049470828] [2024-06-21 20:41:38,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:38,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:38,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:38,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:38,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 392 transitions, 4211 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:38,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:38,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:38,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:40,067 INFO L124 PetriNetUnfolderBase]: 3439/5592 cut-off events. [2024-06-21 20:41:40,067 INFO L125 PetriNetUnfolderBase]: For 1093334/1093337 co-relation queries the response was YES. [2024-06-21 20:41:40,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55536 conditions, 5592 events. 3439/5592 cut-off events. For 1093334/1093337 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34810 event pairs, 732 based on Foata normal form. 6/5545 useless extension candidates. Maximal degree in co-relation 55384. Up to 5047 conditions per place. [2024-06-21 20:41:40,142 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 339 selfloop transitions, 47 changer transitions 0/420 dead transitions. [2024-06-21 20:41:40,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 420 transitions, 5192 flow [2024-06-21 20:41:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:41:40,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:41:40,143 INFO L175 Difference]: Start difference. First operand has 308 places, 392 transitions, 4211 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:41:40,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 420 transitions, 5192 flow [2024-06-21 20:41:42,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 420 transitions, 5004 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:42,571 INFO L231 Difference]: Finished difference. Result has 311 places, 396 transitions, 4264 flow [2024-06-21 20:41:42,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4264, PETRI_PLACES=311, PETRI_TRANSITIONS=396} [2024-06-21 20:41:42,571 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-21 20:41:42,571 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 396 transitions, 4264 flow [2024-06-21 20:41:42,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:42,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:42,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:42,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:41:42,571 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)] === [2024-06-21 20:41:42,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:42,572 INFO L85 PathProgramCache]: Analyzing trace with hash -121461695, now seen corresponding path program 1 times [2024-06-21 20:41:42,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:42,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239255246] [2024-06-21 20:41:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:42,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:43,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:43,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239255246] [2024-06-21 20:41:43,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239255246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:43,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:43,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:43,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334376002] [2024-06-21 20:41:43,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:43,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:43,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:43,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:43,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:43,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:41:43,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 396 transitions, 4264 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:43,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:43,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:41:43,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:44,763 INFO L124 PetriNetUnfolderBase]: 3613/5811 cut-off events. [2024-06-21 20:41:44,764 INFO L125 PetriNetUnfolderBase]: For 1104453/1104453 co-relation queries the response was YES. [2024-06-21 20:41:44,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57205 conditions, 5811 events. 3613/5811 cut-off events. For 1104453/1104453 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35569 event pairs, 769 based on Foata normal form. 2/5807 useless extension candidates. Maximal degree in co-relation 57052. Up to 5344 conditions per place. [2024-06-21 20:41:44,834 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 367 selfloop transitions, 50 changer transitions 0/422 dead transitions. [2024-06-21 20:41:44,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 5292 flow [2024-06-21 20:41:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:41:44,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:41:44,835 INFO L175 Difference]: Start difference. First operand has 311 places, 396 transitions, 4264 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:41:44,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 5292 flow [2024-06-21 20:41:47,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 422 transitions, 5079 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 20:41:47,356 INFO L231 Difference]: Finished difference. Result has 312 places, 400 transitions, 4290 flow [2024-06-21 20:41:47,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4290, PETRI_PLACES=312, PETRI_TRANSITIONS=400} [2024-06-21 20:41:47,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-21 20:41:47,357 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 400 transitions, 4290 flow [2024-06-21 20:41:47,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:47,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:47,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:47,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:41:47,357 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)] === [2024-06-21 20:41:47,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:47,357 INFO L85 PathProgramCache]: Analyzing trace with hash -522104913, now seen corresponding path program 2 times [2024-06-21 20:41:47,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:47,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431279281] [2024-06-21 20:41:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:47,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:48,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431279281] [2024-06-21 20:41:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431279281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:48,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467296204] [2024-06-21 20:41:48,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:48,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:48,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:48,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:41:48,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 400 transitions, 4290 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:48,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:48,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:41:48,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:49,721 INFO L124 PetriNetUnfolderBase]: 3623/5825 cut-off events. [2024-06-21 20:41:49,721 INFO L125 PetriNetUnfolderBase]: For 1127207/1127207 co-relation queries the response was YES. [2024-06-21 20:41:49,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57856 conditions, 5825 events. 3623/5825 cut-off events. For 1127207/1127207 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35649 event pairs, 769 based on Foata normal form. 2/5821 useless extension candidates. Maximal degree in co-relation 57702. Up to 5342 conditions per place. [2024-06-21 20:41:49,794 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 363 selfloop transitions, 56 changer transitions 0/424 dead transitions. [2024-06-21 20:41:49,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 424 transitions, 5324 flow [2024-06-21 20:41:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:41:49,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:41:49,795 INFO L175 Difference]: Start difference. First operand has 312 places, 400 transitions, 4290 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:41:49,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 424 transitions, 5324 flow [2024-06-21 20:41:51,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 424 transitions, 5113 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:51,945 INFO L231 Difference]: Finished difference. Result has 314 places, 404 transitions, 4338 flow [2024-06-21 20:41:51,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4338, PETRI_PLACES=314, PETRI_TRANSITIONS=404} [2024-06-21 20:41:51,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-21 20:41:51,945 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 404 transitions, 4338 flow [2024-06-21 20:41:51,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:51,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:51,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:51,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:41:51,946 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)] === [2024-06-21 20:41:51,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:51,946 INFO L85 PathProgramCache]: Analyzing trace with hash -522104665, now seen corresponding path program 1 times [2024-06-21 20:41:51,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:51,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322200658] [2024-06-21 20:41:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:51,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:52,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:52,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322200658] [2024-06-21 20:41:52,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322200658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:52,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:52,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:52,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765633364] [2024-06-21 20:41:52,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:52,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:52,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:52,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:52,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 404 transitions, 4338 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:52,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:52,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:52,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:54,294 INFO L124 PetriNetUnfolderBase]: 3469/5634 cut-off events. [2024-06-21 20:41:54,294 INFO L125 PetriNetUnfolderBase]: For 1149740/1149743 co-relation queries the response was YES. [2024-06-21 20:41:54,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57401 conditions, 5634 events. 3469/5634 cut-off events. For 1149740/1149743 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35070 event pairs, 728 based on Foata normal form. 4/5585 useless extension candidates. Maximal degree in co-relation 57246. Up to 5089 conditions per place. [2024-06-21 20:41:54,363 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 351 selfloop transitions, 40 changer transitions 0/427 dead transitions. [2024-06-21 20:41:54,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 427 transitions, 5258 flow [2024-06-21 20:41:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:41:54,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 20:41:54,364 INFO L175 Difference]: Start difference. First operand has 314 places, 404 transitions, 4338 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:41:54,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 427 transitions, 5258 flow [2024-06-21 20:41:56,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 427 transitions, 5027 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:56,133 INFO L231 Difference]: Finished difference. Result has 316 places, 408 transitions, 4280 flow [2024-06-21 20:41:56,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4280, PETRI_PLACES=316, PETRI_TRANSITIONS=408} [2024-06-21 20:41:56,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-21 20:41:56,133 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 408 transitions, 4280 flow [2024-06-21 20:41:56,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:56,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:56,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:56,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:41:56,133 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)] === [2024-06-21 20:41:56,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash -285929305, now seen corresponding path program 2 times [2024-06-21 20:41:56,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:56,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571966687] [2024-06-21 20:41:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:56,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:57,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:57,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571966687] [2024-06-21 20:41:57,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571966687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:57,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:57,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:41:57,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426693996] [2024-06-21 20:41:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:57,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:41:57,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:57,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:41:57,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:41:57,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:41:57,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 408 transitions, 4280 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:57,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:57,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:41:57,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:58,592 INFO L124 PetriNetUnfolderBase]: 3479/5648 cut-off events. [2024-06-21 20:41:58,592 INFO L125 PetriNetUnfolderBase]: For 1169208/1169211 co-relation queries the response was YES. [2024-06-21 20:41:58,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57556 conditions, 5648 events. 3479/5648 cut-off events. For 1169208/1169211 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35121 event pairs, 728 based on Foata normal form. 4/5599 useless extension candidates. Maximal degree in co-relation 57400. Up to 5066 conditions per place. [2024-06-21 20:41:58,663 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 339 selfloop transitions, 53 changer transitions 0/428 dead transitions. [2024-06-21 20:41:58,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 428 transitions, 5198 flow [2024-06-21 20:41:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:41:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:41:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:41:58,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:41:58,664 INFO L175 Difference]: Start difference. First operand has 316 places, 408 transitions, 4280 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:41:58,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 428 transitions, 5198 flow [2024-06-21 20:42:00,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 428 transitions, 5075 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:00,693 INFO L231 Difference]: Finished difference. Result has 318 places, 412 transitions, 4364 flow [2024-06-21 20:42:00,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4157, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4364, PETRI_PLACES=318, PETRI_TRANSITIONS=412} [2024-06-21 20:42:00,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-21 20:42:00,694 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 412 transitions, 4364 flow [2024-06-21 20:42:00,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:00,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:00,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:00,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:42:00,694 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)] === [2024-06-21 20:42:00,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash -285929553, now seen corresponding path program 3 times [2024-06-21 20:42:00,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:00,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723480066] [2024-06-21 20:42:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:00,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:01,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:01,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723480066] [2024-06-21 20:42:01,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723480066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:01,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:01,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:01,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883030504] [2024-06-21 20:42:01,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:01,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:01,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:42:01,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 412 transitions, 4364 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) [2024-06-21 20:42:01,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:01,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:42:01,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:02,815 INFO L124 PetriNetUnfolderBase]: 3669/5891 cut-off events. [2024-06-21 20:42:02,816 INFO L125 PetriNetUnfolderBase]: For 1206313/1206313 co-relation queries the response was YES. [2024-06-21 20:42:02,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59665 conditions, 5891 events. 3669/5891 cut-off events. For 1206313/1206313 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36133 event pairs, 768 based on Foata normal form. 2/5887 useless extension candidates. Maximal degree in co-relation 59508. Up to 5332 conditions per place. [2024-06-21 20:42:02,900 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 364 selfloop transitions, 68 changer transitions 0/437 dead transitions. [2024-06-21 20:42:02,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 437 transitions, 5770 flow [2024-06-21 20:42:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:42:02,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:42:02,901 INFO L175 Difference]: Start difference. First operand has 318 places, 412 transitions, 4364 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:42:02,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 437 transitions, 5770 flow [2024-06-21 20:42:05,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 437 transitions, 5613 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:05,407 INFO L231 Difference]: Finished difference. Result has 320 places, 419 transitions, 4590 flow [2024-06-21 20:42:05,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4590, PETRI_PLACES=320, PETRI_TRANSITIONS=419} [2024-06-21 20:42:05,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-21 20:42:05,407 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 419 transitions, 4590 flow [2024-06-21 20:42:05,407 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) [2024-06-21 20:42:05,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:05,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:05,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:42:05,407 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)] === [2024-06-21 20:42:05,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash -285632635, now seen corresponding path program 3 times [2024-06-21 20:42:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:05,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148688586] [2024-06-21 20:42:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:05,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:06,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:06,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148688586] [2024-06-21 20:42:06,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148688586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:06,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:06,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92197060] [2024-06-21 20:42:06,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:06,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:06,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:06,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 419 transitions, 4590 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:06,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:06,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:06,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:07,845 INFO L124 PetriNetUnfolderBase]: 3507/5689 cut-off events. [2024-06-21 20:42:07,845 INFO L125 PetriNetUnfolderBase]: For 1224309/1224312 co-relation queries the response was YES. [2024-06-21 20:42:07,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59110 conditions, 5689 events. 3507/5689 cut-off events. For 1224309/1224312 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35399 event pairs, 729 based on Foata normal form. 4/5640 useless extension candidates. Maximal degree in co-relation 58952. Up to 5045 conditions per place. [2024-06-21 20:42:07,917 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 330 selfloop transitions, 71 changer transitions 0/439 dead transitions. [2024-06-21 20:42:07,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 439 transitions, 5732 flow [2024-06-21 20:42:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:42:07,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 20:42:07,918 INFO L175 Difference]: Start difference. First operand has 320 places, 419 transitions, 4590 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:42:07,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 439 transitions, 5732 flow [2024-06-21 20:42:10,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 439 transitions, 5538 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 20:42:10,013 INFO L231 Difference]: Finished difference. Result has 324 places, 422 transitions, 4626 flow [2024-06-21 20:42:10,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4626, PETRI_PLACES=324, PETRI_TRANSITIONS=422} [2024-06-21 20:42:10,013 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-21 20:42:10,013 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 422 transitions, 4626 flow [2024-06-21 20:42:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:10,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:10,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:10,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:42:10,014 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:10,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:10,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1585472246, now seen corresponding path program 1 times [2024-06-21 20:42:10,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:10,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287324049] [2024-06-21 20:42:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:11,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:11,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287324049] [2024-06-21 20:42:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287324049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:11,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:11,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:42:11,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247230994] [2024-06-21 20:42:11,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:11,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:42:11,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:42:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:42:11,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:42:11,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 422 transitions, 4626 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:11,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:11,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:42:11,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:12,988 INFO L124 PetriNetUnfolderBase]: 3835/6198 cut-off events. [2024-06-21 20:42:12,989 INFO L125 PetriNetUnfolderBase]: For 1284334/1284334 co-relation queries the response was YES. [2024-06-21 20:42:13,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61954 conditions, 6198 events. 3835/6198 cut-off events. For 1284334/1284334 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38764 event pairs, 725 based on Foata normal form. 12/6204 useless extension candidates. Maximal degree in co-relation 61794. Up to 4977 conditions per place. [2024-06-21 20:42:13,070 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 371 selfloop transitions, 98 changer transitions 0/474 dead transitions. [2024-06-21 20:42:13,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 474 transitions, 5886 flow [2024-06-21 20:42:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:42:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:42:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 20:42:13,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-21 20:42:13,071 INFO L175 Difference]: Start difference. First operand has 324 places, 422 transitions, 4626 flow. Second operand 10 states and 201 transitions. [2024-06-21 20:42:13,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 474 transitions, 5886 flow [2024-06-21 20:42:15,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 5718 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:42:15,310 INFO L231 Difference]: Finished difference. Result has 331 places, 433 transitions, 4845 flow [2024-06-21 20:42:15,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4845, PETRI_PLACES=331, PETRI_TRANSITIONS=433} [2024-06-21 20:42:15,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-21 20:42:15,310 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 433 transitions, 4845 flow [2024-06-21 20:42:15,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:15,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:15,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:15,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:42:15,310 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)] === [2024-06-21 20:42:15,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1419608723, now seen corresponding path program 3 times [2024-06-21 20:42:15,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:15,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834537127] [2024-06-21 20:42:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:15,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:16,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:16,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834537127] [2024-06-21 20:42:16,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834537127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:16,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:16,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:16,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020756950] [2024-06-21 20:42:16,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:16,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:16,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:16,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:16,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:16,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:16,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 433 transitions, 4845 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:16,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:16,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:16,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:17,800 INFO L124 PetriNetUnfolderBase]: 3687/6037 cut-off events. [2024-06-21 20:42:17,800 INFO L125 PetriNetUnfolderBase]: For 1287545/1287548 co-relation queries the response was YES. [2024-06-21 20:42:17,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62058 conditions, 6037 events. 3687/6037 cut-off events. For 1287545/1287548 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38551 event pairs, 769 based on Foata normal form. 6/5990 useless extension candidates. Maximal degree in co-relation 61895. Up to 5397 conditions per place. [2024-06-21 20:42:17,881 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 361 selfloop transitions, 54 changer transitions 0/453 dead transitions. [2024-06-21 20:42:17,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 453 transitions, 5855 flow [2024-06-21 20:42:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:42:17,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:42:17,882 INFO L175 Difference]: Start difference. First operand has 331 places, 433 transitions, 4845 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:42:17,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 453 transitions, 5855 flow [2024-06-21 20:42:20,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 453 transitions, 5657 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 20:42:20,444 INFO L231 Difference]: Finished difference. Result has 331 places, 436 transitions, 4897 flow [2024-06-21 20:42:20,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4647, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4897, PETRI_PLACES=331, PETRI_TRANSITIONS=436} [2024-06-21 20:42:20,444 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-21 20:42:20,444 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 436 transitions, 4897 flow [2024-06-21 20:42:20,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:20,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:20,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:42:20,445 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)] === [2024-06-21 20:42:20,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash 151934263, now seen corresponding path program 2 times [2024-06-21 20:42:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:20,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886116398] [2024-06-21 20:42:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:20,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:21,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:21,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886116398] [2024-06-21 20:42:21,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886116398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:21,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:21,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:21,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487369978] [2024-06-21 20:42:21,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:21,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:21,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:21,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 436 transitions, 4897 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:21,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:21,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:21,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:23,097 INFO L124 PetriNetUnfolderBase]: 3743/6117 cut-off events. [2024-06-21 20:42:23,097 INFO L125 PetriNetUnfolderBase]: For 1322575/1322578 co-relation queries the response was YES. [2024-06-21 20:42:23,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63510 conditions, 6117 events. 3743/6117 cut-off events. For 1322575/1322578 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38944 event pairs, 764 based on Foata normal form. 4/6068 useless extension candidates. Maximal degree in co-relation 63349. Up to 5363 conditions per place. [2024-06-21 20:42:23,186 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 355 selfloop transitions, 80 changer transitions 0/473 dead transitions. [2024-06-21 20:42:23,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 473 transitions, 6703 flow [2024-06-21 20:42:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:42:23,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 20:42:23,187 INFO L175 Difference]: Start difference. First operand has 331 places, 436 transitions, 4897 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:42:23,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 473 transitions, 6703 flow [2024-06-21 20:42:25,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 473 transitions, 6475 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:25,857 INFO L231 Difference]: Finished difference. Result has 336 places, 451 transitions, 5278 flow [2024-06-21 20:42:25,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5278, PETRI_PLACES=336, PETRI_TRANSITIONS=451} [2024-06-21 20:42:25,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-21 20:42:25,858 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 451 transitions, 5278 flow [2024-06-21 20:42:25,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:25,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:25,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:25,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:42:25,858 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)] === [2024-06-21 20:42:25,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1076104991, now seen corresponding path program 3 times [2024-06-21 20:42:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:25,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082403535] [2024-06-21 20:42:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:26,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:26,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082403535] [2024-06-21 20:42:26,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082403535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:26,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:26,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187370592] [2024-06-21 20:42:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:26,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:26,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:26,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:26,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:27,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:27,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 451 transitions, 5278 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:27,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:27,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:27,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:28,424 INFO L124 PetriNetUnfolderBase]: 3771/6162 cut-off events. [2024-06-21 20:42:28,424 INFO L125 PetriNetUnfolderBase]: For 1378577/1378580 co-relation queries the response was YES. [2024-06-21 20:42:28,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65075 conditions, 6162 events. 3771/6162 cut-off events. For 1378577/1378580 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39370 event pairs, 769 based on Foata normal form. 6/6115 useless extension candidates. Maximal degree in co-relation 64911. Up to 5361 conditions per place. [2024-06-21 20:42:28,513 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 351 selfloop transitions, 90 changer transitions 0/479 dead transitions. [2024-06-21 20:42:28,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 479 transitions, 7026 flow [2024-06-21 20:42:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:42:28,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 20:42:28,514 INFO L175 Difference]: Start difference. First operand has 336 places, 451 transitions, 5278 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:42:28,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 479 transitions, 7026 flow [2024-06-21 20:42:31,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 479 transitions, 6711 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-21 20:42:31,963 INFO L231 Difference]: Finished difference. Result has 342 places, 459 transitions, 5499 flow [2024-06-21 20:42:31,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4965, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5499, PETRI_PLACES=342, PETRI_TRANSITIONS=459} [2024-06-21 20:42:31,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-21 20:42:31,963 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 459 transitions, 5499 flow [2024-06-21 20:42:31,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:31,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:31,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:42:31,964 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)] === [2024-06-21 20:42:31,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -286039789, now seen corresponding path program 4 times [2024-06-21 20:42:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218863021] [2024-06-21 20:42:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:33,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:33,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218863021] [2024-06-21 20:42:33,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218863021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:33,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:33,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951829647] [2024-06-21 20:42:33,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:33,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:33,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:33,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:33,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 459 transitions, 5499 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:33,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:33,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:33,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:34,625 INFO L124 PetriNetUnfolderBase]: 3783/6181 cut-off events. [2024-06-21 20:42:34,625 INFO L125 PetriNetUnfolderBase]: For 1402198/1402201 co-relation queries the response was YES. [2024-06-21 20:42:34,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65862 conditions, 6181 events. 3783/6181 cut-off events. For 1402198/1402201 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39539 event pairs, 773 based on Foata normal form. 6/6134 useless extension candidates. Maximal degree in co-relation 65695. Up to 5525 conditions per place. [2024-06-21 20:42:34,720 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 384 selfloop transitions, 61 changer transitions 0/483 dead transitions. [2024-06-21 20:42:34,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 483 transitions, 6671 flow [2024-06-21 20:42:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:42:34,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:42:34,721 INFO L175 Difference]: Start difference. First operand has 342 places, 459 transitions, 5499 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:42:34,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 483 transitions, 6671 flow [2024-06-21 20:42:37,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 483 transitions, 6345 flow, removed 105 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:37,574 INFO L231 Difference]: Finished difference. Result has 345 places, 465 transitions, 5543 flow [2024-06-21 20:42:37,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5197, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5543, PETRI_PLACES=345, PETRI_TRANSITIONS=465} [2024-06-21 20:42:37,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-21 20:42:37,574 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 465 transitions, 5543 flow [2024-06-21 20:42:37,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:37,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:37,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:37,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:42:37,575 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)] === [2024-06-21 20:42:37,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 532901547, now seen corresponding path program 4 times [2024-06-21 20:42:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:37,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737454601] [2024-06-21 20:42:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:38,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:38,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737454601] [2024-06-21 20:42:38,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737454601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:38,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:38,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:38,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141893333] [2024-06-21 20:42:38,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:38,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:38,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:38,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:42:38,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 465 transitions, 5543 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) [2024-06-21 20:42:38,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:38,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:42:38,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:39,873 INFO L124 PetriNetUnfolderBase]: 3952/6384 cut-off events. [2024-06-21 20:42:39,873 INFO L125 PetriNetUnfolderBase]: For 1408325/1408325 co-relation queries the response was YES. [2024-06-21 20:42:39,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67175 conditions, 6384 events. 3952/6384 cut-off events. For 1408325/1408325 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40198 event pairs, 835 based on Foata normal form. 1/6375 useless extension candidates. Maximal degree in co-relation 67007. Up to 5877 conditions per place. [2024-06-21 20:42:39,970 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 56 changer transitions 0/486 dead transitions. [2024-06-21 20:42:39,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 486 transitions, 6677 flow [2024-06-21 20:42:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:42:39,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:42:39,972 INFO L175 Difference]: Start difference. First operand has 345 places, 465 transitions, 5543 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:42:39,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 486 transitions, 6677 flow [2024-06-21 20:42:42,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 486 transitions, 6396 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:42,365 INFO L231 Difference]: Finished difference. Result has 346 places, 468 transitions, 5506 flow [2024-06-21 20:42:42,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5262, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5506, PETRI_PLACES=346, PETRI_TRANSITIONS=468} [2024-06-21 20:42:42,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-21 20:42:42,365 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 468 transitions, 5506 flow [2024-06-21 20:42:42,365 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) [2024-06-21 20:42:42,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:42,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:42,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:42:42,365 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)] === [2024-06-21 20:42:42,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash 613013261, now seen corresponding path program 5 times [2024-06-21 20:42:42,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:42,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562880895] [2024-06-21 20:42:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:42,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:43,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:43,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562880895] [2024-06-21 20:42:43,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562880895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:43,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:43,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4626667] [2024-06-21 20:42:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:43,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:43,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:42:43,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 468 transitions, 5506 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) [2024-06-21 20:42:43,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:43,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:42:43,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:44,664 INFO L124 PetriNetUnfolderBase]: 3965/6402 cut-off events. [2024-06-21 20:42:44,664 INFO L125 PetriNetUnfolderBase]: For 1439256/1439256 co-relation queries the response was YES. [2024-06-21 20:42:44,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67712 conditions, 6402 events. 3965/6402 cut-off events. For 1439256/1439256 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40242 event pairs, 834 based on Foata normal form. 1/6393 useless extension candidates. Maximal degree in co-relation 67543. Up to 5879 conditions per place. [2024-06-21 20:42:44,758 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 68 changer transitions 0/490 dead transitions. [2024-06-21 20:42:44,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 490 transitions, 7002 flow [2024-06-21 20:42:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:42:44,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:42:44,759 INFO L175 Difference]: Start difference. First operand has 346 places, 468 transitions, 5506 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:42:44,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 490 transitions, 7002 flow [2024-06-21 20:42:47,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 490 transitions, 6784 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 20:42:47,422 INFO L231 Difference]: Finished difference. Result has 349 places, 474 transitions, 5711 flow [2024-06-21 20:42:47,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5711, PETRI_PLACES=349, PETRI_TRANSITIONS=474} [2024-06-21 20:42:47,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-21 20:42:47,423 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 474 transitions, 5711 flow [2024-06-21 20:42:47,423 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) [2024-06-21 20:42:47,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:47,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:47,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:42:47,423 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)] === [2024-06-21 20:42:47,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2097585523, now seen corresponding path program 6 times [2024-06-21 20:42:47,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:47,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834876213] [2024-06-21 20:42:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834876213] [2024-06-21 20:42:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834876213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908116695] [2024-06-21 20:42:48,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:48,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:48,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:42:48,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 474 transitions, 5711 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:48,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:48,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:42:48,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:49,814 INFO L124 PetriNetUnfolderBase]: 3962/6398 cut-off events. [2024-06-21 20:42:49,814 INFO L125 PetriNetUnfolderBase]: For 1456951/1456951 co-relation queries the response was YES. [2024-06-21 20:42:49,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67980 conditions, 6398 events. 3962/6398 cut-off events. For 1456951/1456951 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40248 event pairs, 832 based on Foata normal form. 1/6389 useless extension candidates. Maximal degree in co-relation 67809. Up to 5891 conditions per place. [2024-06-21 20:42:49,910 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 435 selfloop transitions, 54 changer transitions 0/494 dead transitions. [2024-06-21 20:42:49,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 494 transitions, 6751 flow [2024-06-21 20:42:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:42:49,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:42:49,911 INFO L175 Difference]: Start difference. First operand has 349 places, 474 transitions, 5711 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:42:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 494 transitions, 6751 flow [2024-06-21 20:42:52,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 494 transitions, 6458 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-06-21 20:42:52,850 INFO L231 Difference]: Finished difference. Result has 353 places, 474 transitions, 5532 flow [2024-06-21 20:42:52,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5532, PETRI_PLACES=353, PETRI_TRANSITIONS=474} [2024-06-21 20:42:52,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-21 20:42:52,851 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 474 transitions, 5532 flow [2024-06-21 20:42:52,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:52,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:52,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:52,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:42:52,851 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)] === [2024-06-21 20:42:52,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:52,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1762106237, now seen corresponding path program 4 times [2024-06-21 20:42:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:52,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941742102] [2024-06-21 20:42:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:52,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:53,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:53,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941742102] [2024-06-21 20:42:53,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941742102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:53,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:53,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:42:53,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084211308] [2024-06-21 20:42:53,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:53,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:42:53,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:42:53,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:42:53,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:42:53,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 474 transitions, 5532 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:53,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:53,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:42:53,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:55,281 INFO L124 PetriNetUnfolderBase]: 3791/6187 cut-off events. [2024-06-21 20:42:55,282 INFO L125 PetriNetUnfolderBase]: For 1469613/1469613 co-relation queries the response was YES. [2024-06-21 20:42:55,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66674 conditions, 6187 events. 3791/6187 cut-off events. For 1469613/1469613 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39510 event pairs, 785 based on Foata normal form. 1/6133 useless extension candidates. Maximal degree in co-relation 66501. Up to 5582 conditions per place. [2024-06-21 20:42:55,378 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 405 selfloop transitions, 43 changer transitions 0/489 dead transitions. [2024-06-21 20:42:55,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 489 transitions, 6472 flow [2024-06-21 20:42:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:42:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:42:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:42:55,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 20:42:55,379 INFO L175 Difference]: Start difference. First operand has 353 places, 474 transitions, 5532 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:42:55,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 489 transitions, 6472 flow [2024-06-21 20:42:58,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 489 transitions, 6309 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:58,013 INFO L231 Difference]: Finished difference. Result has 354 places, 474 transitions, 5462 flow [2024-06-21 20:42:58,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5462, PETRI_PLACES=354, PETRI_TRANSITIONS=474} [2024-06-21 20:42:58,013 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-21 20:42:58,013 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 474 transitions, 5462 flow [2024-06-21 20:42:58,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:58,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:58,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:58,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:42:58,014 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)] === [2024-06-21 20:42:58,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:58,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1762105989, now seen corresponding path program 7 times [2024-06-21 20:42:58,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:58,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024392739] [2024-06-21 20:42:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:58,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:58,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:58,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024392739] [2024-06-21 20:42:58,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024392739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:58,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:58,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:58,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563532006] [2024-06-21 20:42:58,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:58,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:58,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:58,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:42:58,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 474 transitions, 5462 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:58,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:58,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:42:58,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:00,398 INFO L124 PetriNetUnfolderBase]: 3952/6383 cut-off events. [2024-06-21 20:43:00,398 INFO L125 PetriNetUnfolderBase]: For 1489693/1489693 co-relation queries the response was YES. [2024-06-21 20:43:00,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67808 conditions, 6383 events. 3952/6383 cut-off events. For 1489693/1489693 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40107 event pairs, 832 based on Foata normal form. 1/6374 useless extension candidates. Maximal degree in co-relation 67634. Up to 5861 conditions per place. [2024-06-21 20:43:00,497 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 426 selfloop transitions, 63 changer transitions 0/494 dead transitions. [2024-06-21 20:43:00,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 494 transitions, 6624 flow [2024-06-21 20:43:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:43:00,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:43:00,498 INFO L175 Difference]: Start difference. First operand has 354 places, 474 transitions, 5462 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:43:00,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 494 transitions, 6624 flow [2024-06-21 20:43:03,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 494 transitions, 6452 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 20:43:03,741 INFO L231 Difference]: Finished difference. Result has 354 places, 477 transitions, 5561 flow [2024-06-21 20:43:03,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5561, PETRI_PLACES=354, PETRI_TRANSITIONS=477} [2024-06-21 20:43:03,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-21 20:43:03,742 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 477 transitions, 5561 flow [2024-06-21 20:43:03,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:03,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:03,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:03,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:43:03,742 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)] === [2024-06-21 20:43:03,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2119078949, now seen corresponding path program 5 times [2024-06-21 20:43:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:03,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303869486] [2024-06-21 20:43:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:03,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:04,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:04,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303869486] [2024-06-21 20:43:04,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303869486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:04,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:04,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:04,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332548717] [2024-06-21 20:43:04,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:04,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:04,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:04,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:04,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:04,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:04,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 477 transitions, 5561 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:04,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:04,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:06,190 INFO L124 PetriNetUnfolderBase]: 3801/6211 cut-off events. [2024-06-21 20:43:06,190 INFO L125 PetriNetUnfolderBase]: For 1519402/1519402 co-relation queries the response was YES. [2024-06-21 20:43:06,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67258 conditions, 6211 events. 3801/6211 cut-off events. For 1519402/1519402 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39783 event pairs, 785 based on Foata normal form. 1/6157 useless extension candidates. Maximal degree in co-relation 67083. Up to 5563 conditions per place. [2024-06-21 20:43:06,286 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 392 selfloop transitions, 63 changer transitions 0/497 dead transitions. [2024-06-21 20:43:06,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 497 transitions, 6902 flow [2024-06-21 20:43:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:43:06,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 20:43:06,287 INFO L175 Difference]: Start difference. First operand has 354 places, 477 transitions, 5561 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:43:06,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 497 transitions, 6902 flow [2024-06-21 20:43:09,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 497 transitions, 6659 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:09,948 INFO L231 Difference]: Finished difference. Result has 357 places, 484 transitions, 5643 flow [2024-06-21 20:43:09,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5318, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5643, PETRI_PLACES=357, PETRI_TRANSITIONS=484} [2024-06-21 20:43:09,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-21 20:43:09,949 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 484 transitions, 5643 flow [2024-06-21 20:43:09,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:09,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:09,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:09,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:43:09,949 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)] === [2024-06-21 20:43:09,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2119547917, now seen corresponding path program 8 times [2024-06-21 20:43:09,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:09,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872075906] [2024-06-21 20:43:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:10,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:10,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872075906] [2024-06-21 20:43:10,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872075906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:10,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:10,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645577372] [2024-06-21 20:43:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:10,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:10,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:10,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 484 transitions, 5643 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:10,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:10,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:10,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:12,415 INFO L124 PetriNetUnfolderBase]: 3978/6419 cut-off events. [2024-06-21 20:43:12,415 INFO L125 PetriNetUnfolderBase]: For 1555738/1555738 co-relation queries the response was YES. [2024-06-21 20:43:12,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69083 conditions, 6419 events. 3978/6419 cut-off events. For 1555738/1555738 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40368 event pairs, 835 based on Foata normal form. 1/6410 useless extension candidates. Maximal degree in co-relation 68906. Up to 5851 conditions per place. [2024-06-21 20:43:12,515 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 408 selfloop transitions, 91 changer transitions 0/504 dead transitions. [2024-06-21 20:43:12,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 504 transitions, 7189 flow [2024-06-21 20:43:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:43:12,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:43:12,515 INFO L175 Difference]: Start difference. First operand has 357 places, 484 transitions, 5643 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:43:12,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 504 transitions, 7189 flow [2024-06-21 20:43:16,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 504 transitions, 7023 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:16,404 INFO L231 Difference]: Finished difference. Result has 360 places, 490 transitions, 5943 flow [2024-06-21 20:43:16,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5477, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5943, PETRI_PLACES=360, PETRI_TRANSITIONS=490} [2024-06-21 20:43:16,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-21 20:43:16,405 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 490 transitions, 5943 flow [2024-06-21 20:43:16,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:16,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:16,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:16,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:43:16,406 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)] === [2024-06-21 20:43:16,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:16,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1817849311, now seen corresponding path program 6 times [2024-06-21 20:43:16,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:16,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256585964] [2024-06-21 20:43:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:16,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:17,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:17,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256585964] [2024-06-21 20:43:17,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256585964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:17,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:17,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834658730] [2024-06-21 20:43:17,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:17,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:17,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:17,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:17,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 490 transitions, 5943 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:17,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:17,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:17,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:18,899 INFO L124 PetriNetUnfolderBase]: 3813/6227 cut-off events. [2024-06-21 20:43:18,899 INFO L125 PetriNetUnfolderBase]: For 1573219/1573219 co-relation queries the response was YES. [2024-06-21 20:43:18,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68214 conditions, 6227 events. 3813/6227 cut-off events. For 1573219/1573219 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39881 event pairs, 787 based on Foata normal form. 1/6173 useless extension candidates. Maximal degree in co-relation 68036. Up to 5590 conditions per place. [2024-06-21 20:43:19,000 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 51 changer transitions 0/502 dead transitions. [2024-06-21 20:43:19,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 502 transitions, 6891 flow [2024-06-21 20:43:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:43:19,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:43:19,000 INFO L175 Difference]: Start difference. First operand has 360 places, 490 transitions, 5943 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:43:19,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 502 transitions, 6891 flow [2024-06-21 20:43:21,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 502 transitions, 6543 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:21,777 INFO L231 Difference]: Finished difference. Result has 363 places, 490 transitions, 5703 flow [2024-06-21 20:43:21,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5703, PETRI_PLACES=363, PETRI_TRANSITIONS=490} [2024-06-21 20:43:21,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-21 20:43:21,777 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 490 transitions, 5703 flow [2024-06-21 20:43:21,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:21,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:21,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:21,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:43:21,778 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)] === [2024-06-21 20:43:21,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1684099153, now seen corresponding path program 9 times [2024-06-21 20:43:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:21,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163113093] [2024-06-21 20:43:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:21,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:22,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:22,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163113093] [2024-06-21 20:43:22,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163113093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:22,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:22,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:22,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163325470] [2024-06-21 20:43:22,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:22,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:22,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:22,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:22,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:22,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:22,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 490 transitions, 5703 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) [2024-06-21 20:43:22,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:22,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:22,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:24,298 INFO L124 PetriNetUnfolderBase]: 3972/6411 cut-off events. [2024-06-21 20:43:24,298 INFO L125 PetriNetUnfolderBase]: For 1589789/1589789 co-relation queries the response was YES. [2024-06-21 20:43:24,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69087 conditions, 6411 events. 3972/6411 cut-off events. For 1589789/1589789 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40360 event pairs, 834 based on Foata normal form. 1/6402 useless extension candidates. Maximal degree in co-relation 68908. Up to 5844 conditions per place. [2024-06-21 20:43:24,404 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 89 changer transitions 0/503 dead transitions. [2024-06-21 20:43:24,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 503 transitions, 6735 flow [2024-06-21 20:43:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:43:24,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:43:24,405 INFO L175 Difference]: Start difference. First operand has 363 places, 490 transitions, 5703 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:43:24,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 503 transitions, 6735 flow [2024-06-21 20:43:27,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 503 transitions, 6545 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:27,874 INFO L231 Difference]: Finished difference. Result has 365 places, 490 transitions, 5697 flow [2024-06-21 20:43:27,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5697, PETRI_PLACES=365, PETRI_TRANSITIONS=490} [2024-06-21 20:43:27,875 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-21 20:43:27,875 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 490 transitions, 5697 flow [2024-06-21 20:43:27,875 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) [2024-06-21 20:43:27,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:27,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:27,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:43:27,875 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)] === [2024-06-21 20:43:27,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:27,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1765287813, now seen corresponding path program 7 times [2024-06-21 20:43:27,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:27,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94043671] [2024-06-21 20:43:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:27,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:28,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94043671] [2024-06-21 20:43:28,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94043671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:28,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:28,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:28,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533207259] [2024-06-21 20:43:28,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:28,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:28,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:28,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:29,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:29,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 490 transitions, 5697 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:29,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:29,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:29,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:30,476 INFO L124 PetriNetUnfolderBase]: 3820/6240 cut-off events. [2024-06-21 20:43:30,476 INFO L125 PetriNetUnfolderBase]: For 1617166/1617169 co-relation queries the response was YES. [2024-06-21 20:43:30,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68260 conditions, 6240 events. 3820/6240 cut-off events. For 1617166/1617169 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39970 event pairs, 799 based on Foata normal form. 4/6184 useless extension candidates. Maximal degree in co-relation 68080. Up to 5506 conditions per place. [2024-06-21 20:43:30,575 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 382 selfloop transitions, 79 changer transitions 0/505 dead transitions. [2024-06-21 20:43:30,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 505 transitions, 6983 flow [2024-06-21 20:43:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:43:30,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:43:30,576 INFO L175 Difference]: Start difference. First operand has 365 places, 490 transitions, 5697 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:43:30,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 505 transitions, 6983 flow [2024-06-21 20:43:34,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 505 transitions, 6775 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:34,465 INFO L231 Difference]: Finished difference. Result has 366 places, 494 transitions, 5750 flow [2024-06-21 20:43:34,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5750, PETRI_PLACES=366, PETRI_TRANSITIONS=494} [2024-06-21 20:43:34,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-21 20:43:34,466 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 494 transitions, 5750 flow [2024-06-21 20:43:34,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:34,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:34,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:34,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:43:34,466 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)] === [2024-06-21 20:43:34,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1764990895, now seen corresponding path program 10 times [2024-06-21 20:43:34,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:34,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917039917] [2024-06-21 20:43:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:34,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:35,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917039917] [2024-06-21 20:43:35,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917039917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:35,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:35,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367801376] [2024-06-21 20:43:35,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:35,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:35,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:35,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:35,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:35,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 494 transitions, 5750 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) [2024-06-21 20:43:35,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:35,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:35,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:36,886 INFO L124 PetriNetUnfolderBase]: 3992/6448 cut-off events. [2024-06-21 20:43:36,886 INFO L125 PetriNetUnfolderBase]: For 1648574/1648574 co-relation queries the response was YES. [2024-06-21 20:43:36,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69933 conditions, 6448 events. 3992/6448 cut-off events. For 1648574/1648574 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40618 event pairs, 866 based on Foata normal form. 2/6436 useless extension candidates. Maximal degree in co-relation 69752. Up to 5755 conditions per place. [2024-06-21 20:43:36,988 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 102 changer transitions 0/514 dead transitions. [2024-06-21 20:43:36,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 514 transitions, 7630 flow [2024-06-21 20:43:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:43:36,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:43:36,989 INFO L175 Difference]: Start difference. First operand has 366 places, 494 transitions, 5750 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:43:36,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 514 transitions, 7630 flow [2024-06-21 20:43:41,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 514 transitions, 7438 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:41,619 INFO L231 Difference]: Finished difference. Result has 369 places, 501 transitions, 6059 flow [2024-06-21 20:43:41,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5558, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6059, PETRI_PLACES=369, PETRI_TRANSITIONS=501} [2024-06-21 20:43:41,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-21 20:43:41,620 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 501 transitions, 6059 flow [2024-06-21 20:43:41,620 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) [2024-06-21 20:43:41,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:41,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:41,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:43:41,620 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)] === [2024-06-21 20:43:41,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1175365159, now seen corresponding path program 11 times [2024-06-21 20:43:41,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:41,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065656282] [2024-06-21 20:43:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:42,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:42,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065656282] [2024-06-21 20:43:42,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065656282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:42,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:42,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:42,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46535164] [2024-06-21 20:43:42,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:42,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:42,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:42,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:43:42,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 501 transitions, 6059 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) [2024-06-21 20:43:42,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:42,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:43:42,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:44,117 INFO L124 PetriNetUnfolderBase]: 3997/6455 cut-off events. [2024-06-21 20:43:44,117 INFO L125 PetriNetUnfolderBase]: For 1674441/1674441 co-relation queries the response was YES. [2024-06-21 20:43:44,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70777 conditions, 6455 events. 3997/6455 cut-off events. For 1674441/1674441 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40619 event pairs, 866 based on Foata normal form. 1/6442 useless extension candidates. Maximal degree in co-relation 70595. Up to 5759 conditions per place. [2024-06-21 20:43:44,214 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 401 selfloop transitions, 113 changer transitions 0/519 dead transitions. [2024-06-21 20:43:44,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 519 transitions, 7905 flow [2024-06-21 20:43:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:43:44,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 20:43:44,215 INFO L175 Difference]: Start difference. First operand has 369 places, 501 transitions, 6059 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:43:44,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 519 transitions, 7905 flow [2024-06-21 20:43:48,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 519 transitions, 7550 flow, removed 102 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:48,018 INFO L231 Difference]: Finished difference. Result has 372 places, 507 transitions, 6230 flow [2024-06-21 20:43:48,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6230, PETRI_PLACES=372, PETRI_TRANSITIONS=507} [2024-06-21 20:43:48,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 20:43:48,019 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 507 transitions, 6230 flow [2024-06-21 20:43:48,019 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) [2024-06-21 20:43:48,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:48,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:48,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:43:48,019 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)] === [2024-06-21 20:43:48,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:48,019 INFO L85 PathProgramCache]: Analyzing trace with hash -180279495, now seen corresponding path program 8 times [2024-06-21 20:43:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:48,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329685531] [2024-06-21 20:43:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:48,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:49,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:49,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329685531] [2024-06-21 20:43:49,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329685531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:49,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:49,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:49,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913106100] [2024-06-21 20:43:49,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:49,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:49,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:49,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:49,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 507 transitions, 6230 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:49,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:49,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:49,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:50,634 INFO L124 PetriNetUnfolderBase]: 3840/6258 cut-off events. [2024-06-21 20:43:50,635 INFO L125 PetriNetUnfolderBase]: For 1690297/1690300 co-relation queries the response was YES. [2024-06-21 20:43:50,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69386 conditions, 6258 events. 3840/6258 cut-off events. For 1690297/1690300 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39930 event pairs, 799 based on Foata normal form. 3/6201 useless extension candidates. Maximal degree in co-relation 69203. Up to 5547 conditions per place. [2024-06-21 20:43:50,737 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 394 selfloop transitions, 80 changer transitions 0/522 dead transitions. [2024-06-21 20:43:50,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 522 transitions, 7553 flow [2024-06-21 20:43:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:43:50,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 20:43:50,738 INFO L175 Difference]: Start difference. First operand has 372 places, 507 transitions, 6230 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:43:50,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 522 transitions, 7553 flow [2024-06-21 20:43:54,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 522 transitions, 7300 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:54,271 INFO L231 Difference]: Finished difference. Result has 376 places, 511 transitions, 6263 flow [2024-06-21 20:43:54,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6263, PETRI_PLACES=376, PETRI_TRANSITIONS=511} [2024-06-21 20:43:54,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-21 20:43:54,271 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 511 transitions, 6263 flow [2024-06-21 20:43:54,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:54,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:54,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:54,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:43:54,273 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)] === [2024-06-21 20:43:54,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1935693573, now seen corresponding path program 9 times [2024-06-21 20:43:54,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:54,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082718011] [2024-06-21 20:43:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:54,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:55,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:55,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082718011] [2024-06-21 20:43:55,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082718011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:55,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:55,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651008578] [2024-06-21 20:43:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:55,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:55,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:55,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:43:55,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 511 transitions, 6263 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:55,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:55,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:43:55,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:56,966 INFO L124 PetriNetUnfolderBase]: 3840/6259 cut-off events. [2024-06-21 20:43:56,966 INFO L125 PetriNetUnfolderBase]: For 1709267/1709270 co-relation queries the response was YES. [2024-06-21 20:43:57,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69353 conditions, 6259 events. 3840/6259 cut-off events. For 1709267/1709270 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39939 event pairs, 797 based on Foata normal form. 4/6203 useless extension candidates. Maximal degree in co-relation 69169. Up to 5566 conditions per place. [2024-06-21 20:43:57,070 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 67 changer transitions 0/524 dead transitions. [2024-06-21 20:43:57,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 524 transitions, 7332 flow [2024-06-21 20:43:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:43:57,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:43:57,072 INFO L175 Difference]: Start difference. First operand has 376 places, 511 transitions, 6263 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:43:57,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 524 transitions, 7332 flow [2024-06-21 20:44:00,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 524 transitions, 7102 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:00,642 INFO L231 Difference]: Finished difference. Result has 379 places, 514 transitions, 6271 flow [2024-06-21 20:44:00,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6046, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6271, PETRI_PLACES=379, PETRI_TRANSITIONS=514} [2024-06-21 20:44:00,643 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 20:44:00,643 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 514 transitions, 6271 flow [2024-06-21 20:44:00,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:00,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:00,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:00,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:44:00,644 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)] === [2024-06-21 20:44:00,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2118560383, now seen corresponding path program 10 times [2024-06-21 20:44:00,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279577304] [2024-06-21 20:44:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:01,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:01,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279577304] [2024-06-21 20:44:01,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279577304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:01,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:01,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:01,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410482334] [2024-06-21 20:44:01,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:01,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:01,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:01,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:01,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 514 transitions, 6271 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:01,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:01,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:01,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:03,189 INFO L124 PetriNetUnfolderBase]: 3844/6264 cut-off events. [2024-06-21 20:44:03,189 INFO L125 PetriNetUnfolderBase]: For 1726628/1726631 co-relation queries the response was YES. [2024-06-21 20:44:03,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69401 conditions, 6264 events. 3844/6264 cut-off events. For 1726628/1726631 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39985 event pairs, 799 based on Foata normal form. 4/6208 useless extension candidates. Maximal degree in co-relation 69216. Up to 5434 conditions per place. [2024-06-21 20:44:03,290 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 359 selfloop transitions, 122 changer transitions 0/529 dead transitions. [2024-06-21 20:44:03,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 529 transitions, 7855 flow [2024-06-21 20:44:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:44:03,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:44:03,291 INFO L175 Difference]: Start difference. First operand has 379 places, 514 transitions, 6271 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:44:03,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 529 transitions, 7855 flow [2024-06-21 20:44:07,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 529 transitions, 7672 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:07,646 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 6426 flow [2024-06-21 20:44:07,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6426, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-21 20:44:07,646 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-21 20:44:07,646 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 6426 flow [2024-06-21 20:44:07,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:07,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:07,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:07,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:44:07,647 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)] === [2024-06-21 20:44:07,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2124274303, now seen corresponding path program 11 times [2024-06-21 20:44:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:07,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468619018] [2024-06-21 20:44:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:07,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:08,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:08,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468619018] [2024-06-21 20:44:08,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468619018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:08,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:08,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81111688] [2024-06-21 20:44:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:08,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:08,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 6426 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:08,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:08,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:08,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:10,429 INFO L124 PetriNetUnfolderBase]: 3835/6256 cut-off events. [2024-06-21 20:44:10,429 INFO L125 PetriNetUnfolderBase]: For 1731346/1731349 co-relation queries the response was YES. [2024-06-21 20:44:10,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69506 conditions, 6256 events. 3835/6256 cut-off events. For 1731346/1731349 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39989 event pairs, 799 based on Foata normal form. 3/6199 useless extension candidates. Maximal degree in co-relation 69320. Up to 5429 conditions per place. [2024-06-21 20:44:10,518 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 130 changer transitions 0/528 dead transitions. [2024-06-21 20:44:10,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 528 transitions, 7670 flow [2024-06-21 20:44:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:44:10,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 20:44:10,519 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 6426 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:44:10,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 528 transitions, 7670 flow [2024-06-21 20:44:14,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 528 transitions, 7323 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:14,216 INFO L231 Difference]: Finished difference. Result has 384 places, 517 transitions, 6345 flow [2024-06-21 20:44:14,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6079, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6345, PETRI_PLACES=384, PETRI_TRANSITIONS=517} [2024-06-21 20:44:14,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-21 20:44:14,216 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 517 transitions, 6345 flow [2024-06-21 20:44:14,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:14,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:14,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:14,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:44:14,216 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)] === [2024-06-21 20:44:14,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1838699203, now seen corresponding path program 12 times [2024-06-21 20:44:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:14,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650562224] [2024-06-21 20:44:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:15,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:15,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650562224] [2024-06-21 20:44:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650562224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:15,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:15,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:15,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730897886] [2024-06-21 20:44:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:15,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:15,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:15,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:44:15,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 517 transitions, 6345 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:15,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:15,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:44:15,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:16,955 INFO L124 PetriNetUnfolderBase]: 3834/6252 cut-off events. [2024-06-21 20:44:16,955 INFO L125 PetriNetUnfolderBase]: For 1751832/1751835 co-relation queries the response was YES. [2024-06-21 20:44:17,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69403 conditions, 6252 events. 3834/6252 cut-off events. For 1751832/1751835 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39925 event pairs, 801 based on Foata normal form. 3/6195 useless extension candidates. Maximal degree in co-relation 69216. Up to 5558 conditions per place. [2024-06-21 20:44:17,064 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 70 changer transitions 0/527 dead transitions. [2024-06-21 20:44:17,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 527 transitions, 7329 flow [2024-06-21 20:44:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:44:17,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:44:17,065 INFO L175 Difference]: Start difference. First operand has 384 places, 517 transitions, 6345 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:44:17,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 527 transitions, 7329 flow [2024-06-21 20:44:21,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 527 transitions, 6941 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 20:44:21,409 INFO L231 Difference]: Finished difference. Result has 383 places, 517 transitions, 6103 flow [2024-06-21 20:44:21,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6103, PETRI_PLACES=383, PETRI_TRANSITIONS=517} [2024-06-21 20:44:21,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-21 20:44:21,409 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 517 transitions, 6103 flow [2024-06-21 20:44:21,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:21,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:21,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:21,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:44:21,410 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)] === [2024-06-21 20:44:21,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1838698955, now seen corresponding path program 12 times [2024-06-21 20:44:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:21,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232039608] [2024-06-21 20:44:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:21,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:22,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:22,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232039608] [2024-06-21 20:44:22,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232039608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:22,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:22,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103223178] [2024-06-21 20:44:22,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:22,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:22,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 517 transitions, 6103 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) [2024-06-21 20:44:22,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:22,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:22,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:23,946 INFO L124 PetriNetUnfolderBase]: 3993/6448 cut-off events. [2024-06-21 20:44:23,946 INFO L125 PetriNetUnfolderBase]: For 1772761/1772761 co-relation queries the response was YES. [2024-06-21 20:44:24,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70345 conditions, 6448 events. 3993/6448 cut-off events. For 1772761/1772761 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40560 event pairs, 866 based on Foata normal form. 1/6435 useless extension candidates. Maximal degree in co-relation 70159. Up to 5756 conditions per place. [2024-06-21 20:44:24,043 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 111 changer transitions 0/528 dead transitions. [2024-06-21 20:44:24,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 528 transitions, 7437 flow [2024-06-21 20:44:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:44:24,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 20:44:24,044 INFO L175 Difference]: Start difference. First operand has 383 places, 517 transitions, 6103 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:44:24,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 528 transitions, 7437 flow [2024-06-21 20:44:29,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 528 transitions, 7151 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:29,018 INFO L231 Difference]: Finished difference. Result has 383 places, 517 transitions, 6045 flow [2024-06-21 20:44:29,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6045, PETRI_PLACES=383, PETRI_TRANSITIONS=517} [2024-06-21 20:44:29,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-21 20:44:29,019 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 517 transitions, 6045 flow [2024-06-21 20:44:29,019 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) [2024-06-21 20:44:29,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:29,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:29,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:44:29,019 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:29,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash -851766470, now seen corresponding path program 2 times [2024-06-21 20:44:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:29,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809718155] [2024-06-21 20:44:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809718155] [2024-06-21 20:44:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809718155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:30,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:30,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:30,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041259700] [2024-06-21 20:44:30,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:30,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:30,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:30,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:30,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:30,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 517 transitions, 6045 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:30,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:30,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:30,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:31,990 INFO L124 PetriNetUnfolderBase]: 4116/6673 cut-off events. [2024-06-21 20:44:31,990 INFO L125 PetriNetUnfolderBase]: For 1852493/1852496 co-relation queries the response was YES. [2024-06-21 20:44:32,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71709 conditions, 6673 events. 4116/6673 cut-off events. For 1852493/1852496 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 42517 event pairs, 836 based on Foata normal form. 14/6675 useless extension candidates. Maximal degree in co-relation 71522. Up to 5625 conditions per place. [2024-06-21 20:44:32,101 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 464 selfloop transitions, 94 changer transitions 0/563 dead transitions. [2024-06-21 20:44:32,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 563 transitions, 7453 flow [2024-06-21 20:44:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 20:44:32,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 20:44:32,102 INFO L175 Difference]: Start difference. First operand has 383 places, 517 transitions, 6045 flow. Second operand 10 states and 198 transitions. [2024-06-21 20:44:32,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 563 transitions, 7453 flow [2024-06-21 20:44:36,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 563 transitions, 7282 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:36,289 INFO L231 Difference]: Finished difference. Result has 389 places, 525 transitions, 6208 flow [2024-06-21 20:44:36,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6208, PETRI_PLACES=389, PETRI_TRANSITIONS=525} [2024-06-21 20:44:36,289 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-21 20:44:36,289 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 525 transitions, 6208 flow [2024-06-21 20:44:36,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:36,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:36,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:36,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:44:36,290 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:36,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:36,290 INFO L85 PathProgramCache]: Analyzing trace with hash 832087768, now seen corresponding path program 3 times [2024-06-21 20:44:36,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:36,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340430346] [2024-06-21 20:44:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:36,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:37,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:37,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340430346] [2024-06-21 20:44:37,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340430346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:37,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:37,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:37,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44073683] [2024-06-21 20:44:37,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:37,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:37,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:37,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:37,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 525 transitions, 6208 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:37,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:37,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:37,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:39,307 INFO L124 PetriNetUnfolderBase]: 4226/6883 cut-off events. [2024-06-21 20:44:39,307 INFO L125 PetriNetUnfolderBase]: For 1887165/1887168 co-relation queries the response was YES. [2024-06-21 20:44:39,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73661 conditions, 6883 events. 4226/6883 cut-off events. For 1887165/1887168 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44510 event pairs, 866 based on Foata normal form. 14/6885 useless extension candidates. Maximal degree in co-relation 73471. Up to 5898 conditions per place. [2024-06-21 20:44:39,417 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 463 selfloop transitions, 100 changer transitions 0/568 dead transitions. [2024-06-21 20:44:39,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 568 transitions, 7607 flow [2024-06-21 20:44:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 20:44:39,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-21 20:44:39,418 INFO L175 Difference]: Start difference. First operand has 389 places, 525 transitions, 6208 flow. Second operand 10 states and 197 transitions. [2024-06-21 20:44:39,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 568 transitions, 7607 flow [2024-06-21 20:44:43,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 568 transitions, 7407 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:43,812 INFO L231 Difference]: Finished difference. Result has 396 places, 531 transitions, 6337 flow [2024-06-21 20:44:43,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6014, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6337, PETRI_PLACES=396, PETRI_TRANSITIONS=531} [2024-06-21 20:44:43,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-21 20:44:43,812 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 531 transitions, 6337 flow [2024-06-21 20:44:43,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:43,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:43,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:43,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:44:43,813 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:43,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1393948376, now seen corresponding path program 4 times [2024-06-21 20:44:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:43,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124815713] [2024-06-21 20:44:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:44,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:44,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124815713] [2024-06-21 20:44:44,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124815713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:44,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:44,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:44,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908747171] [2024-06-21 20:44:44,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:44,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:44,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:44,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:44,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 531 transitions, 6337 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:44,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:44,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:44,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:46,877 INFO L124 PetriNetUnfolderBase]: 4247/6922 cut-off events. [2024-06-21 20:44:46,877 INFO L125 PetriNetUnfolderBase]: For 1852664/1852667 co-relation queries the response was YES. [2024-06-21 20:44:46,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73000 conditions, 6922 events. 4247/6922 cut-off events. For 1852664/1852667 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44832 event pairs, 862 based on Foata normal form. 14/6924 useless extension candidates. Maximal degree in co-relation 72807. Up to 5937 conditions per place. [2024-06-21 20:44:46,989 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 459 selfloop transitions, 107 changer transitions 0/571 dead transitions. [2024-06-21 20:44:46,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 571 transitions, 7681 flow [2024-06-21 20:44:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:44:46,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 20:44:46,990 INFO L175 Difference]: Start difference. First operand has 396 places, 531 transitions, 6337 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:44:46,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 571 transitions, 7681 flow [2024-06-21 20:44:52,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 571 transitions, 7456 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:52,224 INFO L231 Difference]: Finished difference. Result has 402 places, 534 transitions, 6380 flow [2024-06-21 20:44:52,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6380, PETRI_PLACES=402, PETRI_TRANSITIONS=534} [2024-06-21 20:44:52,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-21 20:44:52,225 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 534 transitions, 6380 flow [2024-06-21 20:44:52,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:52,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:52,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:52,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:44:52,225 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:52,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1404990266, now seen corresponding path program 5 times [2024-06-21 20:44:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474104521] [2024-06-21 20:44:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:53,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474104521] [2024-06-21 20:44:53,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474104521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:53,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:53,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:53,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485330164] [2024-06-21 20:44:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:53,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:53,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:53,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:53,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:44:53,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 534 transitions, 6380 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:53,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:53,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:44:53,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:55,127 INFO L124 PetriNetUnfolderBase]: 4227/6890 cut-off events. [2024-06-21 20:44:55,128 INFO L125 PetriNetUnfolderBase]: For 1814418/1814421 co-relation queries the response was YES. [2024-06-21 20:44:55,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71729 conditions, 6890 events. 4227/6890 cut-off events. For 1814418/1814421 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44550 event pairs, 713 based on Foata normal form. 14/6892 useless extension candidates. Maximal degree in co-relation 71534. Up to 4862 conditions per place. [2024-06-21 20:44:55,243 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 443 selfloop transitions, 123 changer transitions 0/571 dead transitions. [2024-06-21 20:44:55,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 571 transitions, 7568 flow [2024-06-21 20:44:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 20:44:55,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:44:55,244 INFO L175 Difference]: Start difference. First operand has 402 places, 534 transitions, 6380 flow. Second operand 10 states and 195 transitions. [2024-06-21 20:44:55,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 571 transitions, 7568 flow [2024-06-21 20:44:59,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 571 transitions, 7220 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:59,637 INFO L231 Difference]: Finished difference. Result has 404 places, 533 transitions, 6164 flow [2024-06-21 20:44:59,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6164, PETRI_PLACES=404, PETRI_TRANSITIONS=533} [2024-06-21 20:44:59,637 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-21 20:44:59,637 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 533 transitions, 6164 flow [2024-06-21 20:44:59,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:59,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:59,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:59,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:44:59,638 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)] === [2024-06-21 20:44:59,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1764867763, now seen corresponding path program 4 times [2024-06-21 20:44:59,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:59,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453130486] [2024-06-21 20:44:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:59,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:00,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:00,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453130486] [2024-06-21 20:45:00,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453130486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:00,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:00,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:00,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627998251] [2024-06-21 20:45:00,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:00,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:00,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:00,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:00,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:00,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 533 transitions, 6164 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:00,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:00,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:00,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:02,319 INFO L124 PetriNetUnfolderBase]: 4066/6691 cut-off events. [2024-06-21 20:45:02,319 INFO L125 PetriNetUnfolderBase]: For 1788526/1788529 co-relation queries the response was YES. [2024-06-21 20:45:02,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69901 conditions, 6691 events. 4066/6691 cut-off events. For 1788526/1788529 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43883 event pairs, 827 based on Foata normal form. 6/6637 useless extension candidates. Maximal degree in co-relation 69706. Up to 5956 conditions per place. [2024-06-21 20:45:02,429 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 431 selfloop transitions, 68 changer transitions 0/547 dead transitions. [2024-06-21 20:45:02,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 547 transitions, 7342 flow [2024-06-21 20:45:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:45:02,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 20:45:02,430 INFO L175 Difference]: Start difference. First operand has 404 places, 533 transitions, 6164 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:45:02,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 547 transitions, 7342 flow [2024-06-21 20:45:06,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 547 transitions, 6995 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 20:45:06,786 INFO L231 Difference]: Finished difference. Result has 403 places, 536 transitions, 6117 flow [2024-06-21 20:45:06,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6117, PETRI_PLACES=403, PETRI_TRANSITIONS=536} [2024-06-21 20:45:06,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-21 20:45:06,786 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 536 transitions, 6117 flow [2024-06-21 20:45:06,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:06,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:06,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:06,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:45:06,787 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)] === [2024-06-21 20:45:06,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1165838735, now seen corresponding path program 5 times [2024-06-21 20:45:06,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:06,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369262499] [2024-06-21 20:45:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:06,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:07,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:07,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369262499] [2024-06-21 20:45:07,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369262499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:07,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:07,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:07,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328040361] [2024-06-21 20:45:07,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:07,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:07,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:07,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:08,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:08,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 536 transitions, 6117 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:08,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:08,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:08,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:09,742 INFO L124 PetriNetUnfolderBase]: 4122/6778 cut-off events. [2024-06-21 20:45:09,742 INFO L125 PetriNetUnfolderBase]: For 1844692/1844695 co-relation queries the response was YES. [2024-06-21 20:45:09,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70952 conditions, 6778 events. 4122/6778 cut-off events. For 1844692/1844695 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44573 event pairs, 800 based on Foata normal form. 6/6731 useless extension candidates. Maximal degree in co-relation 70757. Up to 6108 conditions per place. [2024-06-21 20:45:09,855 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 456 selfloop transitions, 56 changer transitions 0/560 dead transitions. [2024-06-21 20:45:09,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 560 transitions, 7802 flow [2024-06-21 20:45:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:45:09,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-21 20:45:09,856 INFO L175 Difference]: Start difference. First operand has 403 places, 536 transitions, 6117 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:45:09,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 560 transitions, 7802 flow [2024-06-21 20:45:15,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 560 transitions, 7524 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:15,274 INFO L231 Difference]: Finished difference. Result has 407 places, 544 transitions, 6318 flow [2024-06-21 20:45:15,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6318, PETRI_PLACES=407, PETRI_TRANSITIONS=544} [2024-06-21 20:45:15,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-21 20:45:15,275 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 544 transitions, 6318 flow [2024-06-21 20:45:15,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:15,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:15,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:15,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:45:15,275 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)] === [2024-06-21 20:45:15,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2072973037, now seen corresponding path program 6 times [2024-06-21 20:45:15,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:15,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276062695] [2024-06-21 20:45:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:16,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:16,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276062695] [2024-06-21 20:45:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276062695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:16,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:16,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:16,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075099160] [2024-06-21 20:45:16,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:16,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:16,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:16,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:16,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 544 transitions, 6318 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:16,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:16,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:16,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:18,245 INFO L124 PetriNetUnfolderBase]: 4152/6819 cut-off events. [2024-06-21 20:45:18,245 INFO L125 PetriNetUnfolderBase]: For 1909302/1909305 co-relation queries the response was YES. [2024-06-21 20:45:18,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72412 conditions, 6819 events. 4152/6819 cut-off events. For 1909302/1909305 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 44876 event pairs, 812 based on Foata normal form. 4/6763 useless extension candidates. Maximal degree in co-relation 72215. Up to 5789 conditions per place. [2024-06-21 20:45:18,359 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 403 selfloop transitions, 140 changer transitions 0/591 dead transitions. [2024-06-21 20:45:18,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 591 transitions, 9199 flow [2024-06-21 20:45:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:45:18,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:45:18,360 INFO L175 Difference]: Start difference. First operand has 407 places, 544 transitions, 6318 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:45:18,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 591 transitions, 9199 flow [2024-06-21 20:45:23,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 591 transitions, 8535 flow, removed 204 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:23,365 INFO L231 Difference]: Finished difference. Result has 412 places, 564 transitions, 6728 flow [2024-06-21 20:45:23,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6728, PETRI_PLACES=412, PETRI_TRANSITIONS=564} [2024-06-21 20:45:23,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-21 20:45:23,366 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 564 transitions, 6728 flow [2024-06-21 20:45:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:23,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:23,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:45:23,366 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)] === [2024-06-21 20:45:23,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:23,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1764880659, now seen corresponding path program 7 times [2024-06-21 20:45:23,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:23,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041624150] [2024-06-21 20:45:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:23,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:24,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:24,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041624150] [2024-06-21 20:45:24,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041624150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:24,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:24,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:24,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785536145] [2024-06-21 20:45:24,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:24,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:24,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:24,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:24,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 564 transitions, 6728 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:24,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:24,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:24,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:26,339 INFO L124 PetriNetUnfolderBase]: 4172/6854 cut-off events. [2024-06-21 20:45:26,340 INFO L125 PetriNetUnfolderBase]: For 1963735/1963738 co-relation queries the response was YES. [2024-06-21 20:45:26,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73270 conditions, 6854 events. 4172/6854 cut-off events. For 1963735/1963738 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45113 event pairs, 829 based on Foata normal form. 6/6800 useless extension candidates. Maximal degree in co-relation 73071. Up to 6106 conditions per place. [2024-06-21 20:45:26,455 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 459 selfloop transitions, 75 changer transitions 0/582 dead transitions. [2024-06-21 20:45:26,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 582 transitions, 8101 flow [2024-06-21 20:45:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:45:26,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:45:26,456 INFO L175 Difference]: Start difference. First operand has 412 places, 564 transitions, 6728 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:45:26,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 582 transitions, 8101 flow [2024-06-21 20:45:31,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 582 transitions, 7791 flow, removed 121 selfloop flow, removed 3 redundant places. [2024-06-21 20:45:31,269 INFO L231 Difference]: Finished difference. Result has 418 places, 570 transitions, 6857 flow [2024-06-21 20:45:31,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6857, PETRI_PLACES=418, PETRI_TRANSITIONS=570} [2024-06-21 20:45:31,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-21 20:45:31,270 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 570 transitions, 6857 flow [2024-06-21 20:45:31,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:31,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:31,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:31,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:45:31,270 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)] === [2024-06-21 20:45:31,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2072986987, now seen corresponding path program 8 times [2024-06-21 20:45:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:31,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405843703] [2024-06-21 20:45:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:31,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:32,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:32,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405843703] [2024-06-21 20:45:32,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405843703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:32,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:32,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:32,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561764382] [2024-06-21 20:45:32,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:32,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:32,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:32,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:32,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:32,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:32,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 570 transitions, 6857 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:32,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:32,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:32,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:34,237 INFO L124 PetriNetUnfolderBase]: 4216/6918 cut-off events. [2024-06-21 20:45:34,237 INFO L125 PetriNetUnfolderBase]: For 2027047/2027050 co-relation queries the response was YES. [2024-06-21 20:45:34,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75223 conditions, 6918 events. 4216/6918 cut-off events. For 2027047/2027050 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 45493 event pairs, 825 based on Foata normal form. 6/6864 useless extension candidates. Maximal degree in co-relation 75022. Up to 5694 conditions per place. [2024-06-21 20:45:34,354 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 367 selfloop transitions, 190 changer transitions 0/605 dead transitions. [2024-06-21 20:45:34,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 605 transitions, 9725 flow [2024-06-21 20:45:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 20:45:34,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 20:45:34,355 INFO L175 Difference]: Start difference. First operand has 418 places, 570 transitions, 6857 flow. Second operand 9 states and 179 transitions. [2024-06-21 20:45:34,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 605 transitions, 9725 flow [2024-06-21 20:45:37,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 605 transitions, 9352 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:37,809 INFO L231 Difference]: Finished difference. Result has 422 places, 587 transitions, 7698 flow [2024-06-21 20:45:37,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7698, PETRI_PLACES=422, PETRI_TRANSITIONS=587} [2024-06-21 20:45:37,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-21 20:45:37,810 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 587 transitions, 7698 flow [2024-06-21 20:45:37,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:37,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:37,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:37,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:45:37,811 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)] === [2024-06-21 20:45:37,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1661874769, now seen corresponding path program 9 times [2024-06-21 20:45:37,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478043684] [2024-06-21 20:45:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:37,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:38,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:38,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478043684] [2024-06-21 20:45:38,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478043684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:38,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:38,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:38,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978296368] [2024-06-21 20:45:38,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:38,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:38,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:38,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:38,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:39,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:39,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 587 transitions, 7698 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:39,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:39,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:39,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:40,873 INFO L124 PetriNetUnfolderBase]: 4242/6962 cut-off events. [2024-06-21 20:45:40,874 INFO L125 PetriNetUnfolderBase]: For 2063462/2063465 co-relation queries the response was YES. [2024-06-21 20:45:40,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76831 conditions, 6962 events. 4242/6962 cut-off events. For 2063462/2063465 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 45846 event pairs, 833 based on Foata normal form. 6/6908 useless extension candidates. Maximal degree in co-relation 76627. Up to 6086 conditions per place. [2024-06-21 20:45:40,993 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 464 selfloop transitions, 96 changer transitions 0/608 dead transitions. [2024-06-21 20:45:40,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 608 transitions, 9557 flow [2024-06-21 20:45:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:45:40,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:45:40,994 INFO L175 Difference]: Start difference. First operand has 422 places, 587 transitions, 7698 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:45:40,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 608 transitions, 9557 flow [2024-06-21 20:45:45,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 608 transitions, 9147 flow, removed 171 selfloop flow, removed 3 redundant places. [2024-06-21 20:45:45,775 INFO L231 Difference]: Finished difference. Result has 429 places, 594 transitions, 7857 flow [2024-06-21 20:45:45,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7857, PETRI_PLACES=429, PETRI_TRANSITIONS=594} [2024-06-21 20:45:45,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-21 20:45:45,776 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 594 transitions, 7857 flow [2024-06-21 20:45:45,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:45,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:45,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:45,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:45:45,776 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)] === [2024-06-21 20:45:45,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1661860819, now seen corresponding path program 10 times [2024-06-21 20:45:45,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:45,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735090394] [2024-06-21 20:45:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:45,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:46,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:46,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735090394] [2024-06-21 20:45:46,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735090394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:46,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:46,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116200002] [2024-06-21 20:45:46,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:47,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:47,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 594 transitions, 7857 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:47,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:47,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:47,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:48,937 INFO L124 PetriNetUnfolderBase]: 4246/6968 cut-off events. [2024-06-21 20:45:48,938 INFO L125 PetriNetUnfolderBase]: For 2057410/2057413 co-relation queries the response was YES. [2024-06-21 20:45:49,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75815 conditions, 6968 events. 4246/6968 cut-off events. For 2057410/2057413 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 45857 event pairs, 832 based on Foata normal form. 6/6914 useless extension candidates. Maximal degree in co-relation 75608. Up to 6093 conditions per place. [2024-06-21 20:45:49,057 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 464 selfloop transitions, 102 changer transitions 0/614 dead transitions. [2024-06-21 20:45:49,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 614 transitions, 9598 flow [2024-06-21 20:45:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:45:49,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 20:45:49,058 INFO L175 Difference]: Start difference. First operand has 429 places, 594 transitions, 7857 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:45:49,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 614 transitions, 9598 flow [2024-06-21 20:45:54,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 614 transitions, 8965 flow, removed 148 selfloop flow, removed 8 redundant places. [2024-06-21 20:45:54,130 INFO L231 Difference]: Finished difference. Result has 430 places, 600 transitions, 7718 flow [2024-06-21 20:45:54,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7262, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7718, PETRI_PLACES=430, PETRI_TRANSITIONS=600} [2024-06-21 20:45:54,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-21 20:45:54,131 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 600 transitions, 7718 flow [2024-06-21 20:45:54,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:54,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:54,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:54,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:45:54,131 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)] === [2024-06-21 20:45:54,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:54,131 INFO L85 PathProgramCache]: Analyzing trace with hash 541481355, now seen corresponding path program 1 times [2024-06-21 20:45:54,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:54,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403207171] [2024-06-21 20:45:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:54,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403207171] [2024-06-21 20:45:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403207171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:55,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:55,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:45:55,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776520110] [2024-06-21 20:45:55,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:55,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:45:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:45:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:45:55,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:45:55,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 600 transitions, 7718 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:55,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:55,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:45:55,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:57,038 INFO L124 PetriNetUnfolderBase]: 4274/7034 cut-off events. [2024-06-21 20:45:57,038 INFO L125 PetriNetUnfolderBase]: For 2043995/2043995 co-relation queries the response was YES. [2024-06-21 20:45:57,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75410 conditions, 7034 events. 4274/7034 cut-off events. For 2043995/2043995 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 46344 event pairs, 814 based on Foata normal form. 1/7032 useless extension candidates. Maximal degree in co-relation 75203. Up to 6444 conditions per place. [2024-06-21 20:45:57,159 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 571 selfloop transitions, 24 changer transitions 0/626 dead transitions. [2024-06-21 20:45:57,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 626 transitions, 9094 flow [2024-06-21 20:45:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:45:57,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:45:57,160 INFO L175 Difference]: Start difference. First operand has 430 places, 600 transitions, 7718 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:45:57,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 626 transitions, 9094 flow [2024-06-21 20:46:02,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 626 transitions, 8735 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:02,344 INFO L231 Difference]: Finished difference. Result has 433 places, 603 transitions, 7535 flow [2024-06-21 20:46:02,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7359, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7535, PETRI_PLACES=433, PETRI_TRANSITIONS=603} [2024-06-21 20:46:02,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-21 20:46:02,345 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 603 transitions, 7535 flow [2024-06-21 20:46:02,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:02,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:02,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:02,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:46:02,345 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)] === [2024-06-21 20:46:02,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1860984409, now seen corresponding path program 1 times [2024-06-21 20:46:02,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:02,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789751272] [2024-06-21 20:46:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:02,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:03,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789751272] [2024-06-21 20:46:03,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789751272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:03,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:03,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:03,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631807686] [2024-06-21 20:46:03,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:03,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:03,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:03,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:03,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:03,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:03,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 603 transitions, 7535 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:03,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:03,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:03,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:05,227 INFO L124 PetriNetUnfolderBase]: 4294/7066 cut-off events. [2024-06-21 20:46:05,227 INFO L125 PetriNetUnfolderBase]: For 2121177/2121177 co-relation queries the response was YES. [2024-06-21 20:46:05,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75914 conditions, 7066 events. 4294/7066 cut-off events. For 2121177/2121177 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 46610 event pairs, 813 based on Foata normal form. 6/7069 useless extension candidates. Maximal degree in co-relation 75706. Up to 6466 conditions per place. [2024-06-21 20:46:05,346 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 573 selfloop transitions, 25 changer transitions 0/629 dead transitions. [2024-06-21 20:46:05,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 629 transitions, 8925 flow [2024-06-21 20:46:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:46:05,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:46:05,347 INFO L175 Difference]: Start difference. First operand has 433 places, 603 transitions, 7535 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:46:05,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 629 transitions, 8925 flow [2024-06-21 20:46:11,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 629 transitions, 8769 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-21 20:46:11,466 INFO L231 Difference]: Finished difference. Result has 435 places, 607 transitions, 7560 flow [2024-06-21 20:46:11,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7379, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7560, PETRI_PLACES=435, PETRI_TRANSITIONS=607} [2024-06-21 20:46:11,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-21 20:46:11,467 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 607 transitions, 7560 flow [2024-06-21 20:46:11,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:11,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:11,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:11,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:46:11,467 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)] === [2024-06-21 20:46:11,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:11,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1856342779, now seen corresponding path program 2 times [2024-06-21 20:46:11,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:11,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151294450] [2024-06-21 20:46:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:11,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:12,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:12,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151294450] [2024-06-21 20:46:12,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151294450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:12,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:12,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:12,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421092616] [2024-06-21 20:46:12,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:12,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:12,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:12,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:12,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 607 transitions, 7560 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:12,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:12,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:14,679 INFO L124 PetriNetUnfolderBase]: 4318/7102 cut-off events. [2024-06-21 20:46:14,679 INFO L125 PetriNetUnfolderBase]: For 2158153/2158158 co-relation queries the response was YES. [2024-06-21 20:46:14,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77330 conditions, 7102 events. 4318/7102 cut-off events. For 2158153/2158158 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46841 event pairs, 813 based on Foata normal form. 6/7105 useless extension candidates. Maximal degree in co-relation 77121. Up to 6491 conditions per place. [2024-06-21 20:46:14,791 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 570 selfloop transitions, 30 changer transitions 0/631 dead transitions. [2024-06-21 20:46:14,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 631 transitions, 8966 flow [2024-06-21 20:46:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:46:14,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:46:14,792 INFO L175 Difference]: Start difference. First operand has 435 places, 607 transitions, 7560 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:46:14,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 631 transitions, 8966 flow [2024-06-21 20:46:20,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 631 transitions, 8813 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 20:46:20,717 INFO L231 Difference]: Finished difference. Result has 437 places, 611 transitions, 7606 flow [2024-06-21 20:46:20,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7606, PETRI_PLACES=437, PETRI_TRANSITIONS=611} [2024-06-21 20:46:20,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-21 20:46:20,718 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 611 transitions, 7606 flow [2024-06-21 20:46:20,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:20,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:20,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:20,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:46:20,718 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)] === [2024-06-21 20:46:20,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2003175753, now seen corresponding path program 3 times [2024-06-21 20:46:20,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:20,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046245225] [2024-06-21 20:46:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:20,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:21,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:21,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046245225] [2024-06-21 20:46:21,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046245225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:21,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:21,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649575096] [2024-06-21 20:46:21,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:21,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:21,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:21,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 611 transitions, 7606 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:21,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:21,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:21,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:23,713 INFO L124 PetriNetUnfolderBase]: 4328/7116 cut-off events. [2024-06-21 20:46:23,713 INFO L125 PetriNetUnfolderBase]: For 2157760/2157769 co-relation queries the response was YES. [2024-06-21 20:46:23,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78133 conditions, 7116 events. 4328/7116 cut-off events. For 2157760/2157769 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 46959 event pairs, 813 based on Foata normal form. 8/7120 useless extension candidates. Maximal degree in co-relation 77923. Up to 6479 conditions per place. [2024-06-21 20:46:23,834 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 563 selfloop transitions, 41 changer transitions 0/635 dead transitions. [2024-06-21 20:46:23,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 635 transitions, 9013 flow [2024-06-21 20:46:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:46:23,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 20:46:23,835 INFO L175 Difference]: Start difference. First operand has 437 places, 611 transitions, 7606 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:46:23,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 635 transitions, 9013 flow [2024-06-21 20:46:30,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 635 transitions, 8842 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-21 20:46:30,469 INFO L231 Difference]: Finished difference. Result has 439 places, 614 transitions, 7642 flow [2024-06-21 20:46:30,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7435, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7642, PETRI_PLACES=439, PETRI_TRANSITIONS=614} [2024-06-21 20:46:30,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-21 20:46:30,470 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 614 transitions, 7642 flow [2024-06-21 20:46:30,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:30,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:30,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:30,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:46:30,470 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)] === [2024-06-21 20:46:30,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2119301653, now seen corresponding path program 4 times [2024-06-21 20:46:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:30,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577010201] [2024-06-21 20:46:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:30,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:31,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:31,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577010201] [2024-06-21 20:46:31,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577010201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:31,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:31,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:31,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881292508] [2024-06-21 20:46:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:31,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:31,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:31,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 614 transitions, 7642 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:31,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:31,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:31,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:33,505 INFO L124 PetriNetUnfolderBase]: 4355/7157 cut-off events. [2024-06-21 20:46:33,505 INFO L125 PetriNetUnfolderBase]: For 2219931/2219945 co-relation queries the response was YES. [2024-06-21 20:46:33,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79518 conditions, 7157 events. 4355/7157 cut-off events. For 2219931/2219945 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 47233 event pairs, 814 based on Foata normal form. 2/7155 useless extension candidates. Maximal degree in co-relation 79307. Up to 6522 conditions per place. [2024-06-21 20:46:33,629 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 568 selfloop transitions, 41 changer transitions 0/640 dead transitions. [2024-06-21 20:46:33,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 640 transitions, 9429 flow [2024-06-21 20:46:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:46:33,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 20:46:33,630 INFO L175 Difference]: Start difference. First operand has 439 places, 614 transitions, 7642 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:46:33,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 640 transitions, 9429 flow [2024-06-21 20:46:40,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 640 transitions, 9246 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 20:46:40,576 INFO L231 Difference]: Finished difference. Result has 442 places, 622 transitions, 7767 flow [2024-06-21 20:46:40,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7459, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7767, PETRI_PLACES=442, PETRI_TRANSITIONS=622} [2024-06-21 20:46:40,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-21 20:46:40,577 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 622 transitions, 7767 flow [2024-06-21 20:46:40,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:40,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:40,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:40,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:46:40,578 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)] === [2024-06-21 20:46:40,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2119308163, now seen corresponding path program 5 times [2024-06-21 20:46:40,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:40,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673979683] [2024-06-21 20:46:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:40,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:41,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:41,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673979683] [2024-06-21 20:46:41,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673979683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:41,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:41,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:41,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146155104] [2024-06-21 20:46:41,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:41,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:41,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:41,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:41,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:41,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 622 transitions, 7767 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:41,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:41,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:41,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:43,864 INFO L124 PetriNetUnfolderBase]: 4343/7141 cut-off events. [2024-06-21 20:46:43,864 INFO L125 PetriNetUnfolderBase]: For 2234155/2234165 co-relation queries the response was YES. [2024-06-21 20:46:43,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79690 conditions, 7141 events. 4343/7141 cut-off events. For 2234155/2234165 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 47139 event pairs, 813 based on Foata normal form. 5/7142 useless extension candidates. Maximal degree in co-relation 79477. Up to 6518 conditions per place. [2024-06-21 20:46:43,975 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 572 selfloop transitions, 36 changer transitions 0/639 dead transitions. [2024-06-21 20:46:43,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 639 transitions, 9067 flow [2024-06-21 20:46:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:46:43,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-21 20:46:43,976 INFO L175 Difference]: Start difference. First operand has 442 places, 622 transitions, 7767 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:46:43,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 639 transitions, 9067 flow [2024-06-21 20:46:49,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 639 transitions, 8841 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:49,539 INFO L231 Difference]: Finished difference. Result has 445 places, 622 transitions, 7620 flow [2024-06-21 20:46:49,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7620, PETRI_PLACES=445, PETRI_TRANSITIONS=622} [2024-06-21 20:46:49,540 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-21 20:46:49,540 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 622 transitions, 7620 flow [2024-06-21 20:46:49,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:49,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:49,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:49,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:46:49,540 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)] === [2024-06-21 20:46:49,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:49,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1683615739, now seen corresponding path program 6 times [2024-06-21 20:46:49,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:49,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822802946] [2024-06-21 20:46:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:49,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:50,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822802946] [2024-06-21 20:46:50,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822802946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:50,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:50,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623272214] [2024-06-21 20:46:50,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:50,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:50,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:50,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:46:50,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 622 transitions, 7620 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:50,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:50,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:46:50,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:52,761 INFO L124 PetriNetUnfolderBase]: 4365/7173 cut-off events. [2024-06-21 20:46:52,761 INFO L125 PetriNetUnfolderBase]: For 2273979/2273989 co-relation queries the response was YES. [2024-06-21 20:46:52,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80373 conditions, 7173 events. 4365/7173 cut-off events. For 2273979/2273989 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 47376 event pairs, 813 based on Foata normal form. 3/7173 useless extension candidates. Maximal degree in co-relation 80159. Up to 6465 conditions per place. [2024-06-21 20:46:52,889 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 549 selfloop transitions, 71 changer transitions 0/651 dead transitions. [2024-06-21 20:46:52,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 651 transitions, 9536 flow [2024-06-21 20:46:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:46:52,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:46:52,890 INFO L175 Difference]: Start difference. First operand has 445 places, 622 transitions, 7620 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:46:52,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 651 transitions, 9536 flow [2024-06-21 20:46:59,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 651 transitions, 9465 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:46:59,582 INFO L231 Difference]: Finished difference. Result has 448 places, 629 transitions, 8013 flow [2024-06-21 20:46:59,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8013, PETRI_PLACES=448, PETRI_TRANSITIONS=629} [2024-06-21 20:46:59,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-21 20:46:59,583 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 629 transitions, 8013 flow [2024-06-21 20:46:59,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:59,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:59,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:46:59,583 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)] === [2024-06-21 20:46:59,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:59,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1942368679, now seen corresponding path program 7 times [2024-06-21 20:46:59,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:59,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881806200] [2024-06-21 20:46:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:00,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881806200] [2024-06-21 20:47:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881806200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:00,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615923131] [2024-06-21 20:47:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:00,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:00,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:00,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:47:00,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 629 transitions, 8013 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:00,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:00,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:47:00,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:02,706 INFO L124 PetriNetUnfolderBase]: 4397/7220 cut-off events. [2024-06-21 20:47:02,706 INFO L125 PetriNetUnfolderBase]: For 2352649/2352659 co-relation queries the response was YES. [2024-06-21 20:47:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82536 conditions, 7220 events. 4397/7220 cut-off events. For 2352649/2352659 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 47676 event pairs, 823 based on Foata normal form. 7/7220 useless extension candidates. Maximal degree in co-relation 82320. Up to 6571 conditions per place. [2024-06-21 20:47:02,836 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 572 selfloop transitions, 45 changer transitions 0/648 dead transitions. [2024-06-21 20:47:02,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 648 transitions, 9493 flow [2024-06-21 20:47:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:47:02,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-21 20:47:02,837 INFO L175 Difference]: Start difference. First operand has 448 places, 629 transitions, 8013 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:47:02,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 648 transitions, 9493 flow [2024-06-21 20:47:09,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 648 transitions, 9325 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-21 20:47:09,403 INFO L231 Difference]: Finished difference. Result has 452 places, 633 transitions, 8104 flow [2024-06-21 20:47:09,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7845, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8104, PETRI_PLACES=452, PETRI_TRANSITIONS=633} [2024-06-21 20:47:09,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-21 20:47:09,404 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 633 transitions, 8104 flow [2024-06-21 20:47:09,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:09,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:09,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:09,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:47:09,404 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)] === [2024-06-21 20:47:09,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:09,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1838951729, now seen corresponding path program 8 times [2024-06-21 20:47:09,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:09,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618083786] [2024-06-21 20:47:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:09,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:10,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:10,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618083786] [2024-06-21 20:47:10,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618083786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:10,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:10,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:10,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530710702] [2024-06-21 20:47:10,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:10,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:10,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:47:10,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 633 transitions, 8104 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:10,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:10,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:47:10,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:12,687 INFO L124 PetriNetUnfolderBase]: 4401/7226 cut-off events. [2024-06-21 20:47:12,687 INFO L125 PetriNetUnfolderBase]: For 2325634/2325644 co-relation queries the response was YES. [2024-06-21 20:47:12,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83266 conditions, 7226 events. 4401/7226 cut-off events. For 2325634/2325644 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 47695 event pairs, 822 based on Foata normal form. 2/7222 useless extension candidates. Maximal degree in co-relation 83048. Up to 6577 conditions per place. [2024-06-21 20:47:12,814 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 574 selfloop transitions, 50 changer transitions 0/655 dead transitions. [2024-06-21 20:47:12,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 655 transitions, 9680 flow [2024-06-21 20:47:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:47:12,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-21 20:47:12,815 INFO L175 Difference]: Start difference. First operand has 452 places, 633 transitions, 8104 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:47:12,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 655 transitions, 9680 flow [2024-06-21 20:47:20,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 655 transitions, 9344 flow, removed 124 selfloop flow, removed 7 redundant places. [2024-06-21 20:47:20,625 INFO L231 Difference]: Finished difference. Result has 455 places, 641 transitions, 8139 flow [2024-06-21 20:47:20,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7875, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8139, PETRI_PLACES=455, PETRI_TRANSITIONS=641} [2024-06-21 20:47:20,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-21 20:47:20,626 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 641 transitions, 8139 flow [2024-06-21 20:47:20,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:20,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:20,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:20,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:47:20,626 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)] === [2024-06-21 20:47:20,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:20,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2124282239, now seen corresponding path program 9 times [2024-06-21 20:47:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:20,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653758339] [2024-06-21 20:47:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:20,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:21,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:21,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653758339] [2024-06-21 20:47:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653758339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:21,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:21,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889198137] [2024-06-21 20:47:21,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:21,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:21,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:47:21,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 641 transitions, 8139 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:21,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:21,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:47:21,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:23,739 INFO L124 PetriNetUnfolderBase]: 4411/7241 cut-off events. [2024-06-21 20:47:23,739 INFO L125 PetriNetUnfolderBase]: For 2382533/2382543 co-relation queries the response was YES. [2024-06-21 20:47:23,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83787 conditions, 7241 events. 4411/7241 cut-off events. For 2382533/2382543 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 47767 event pairs, 823 based on Foata normal form. 4/7238 useless extension candidates. Maximal degree in co-relation 83567. Up to 6417 conditions per place. [2024-06-21 20:47:23,871 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 518 selfloop transitions, 118 changer transitions 0/667 dead transitions. [2024-06-21 20:47:23,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 667 transitions, 10533 flow [2024-06-21 20:47:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:47:23,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:47:23,872 INFO L175 Difference]: Start difference. First operand has 455 places, 641 transitions, 8139 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:47:23,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 667 transitions, 10533 flow [2024-06-21 20:47:32,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 667 transitions, 10377 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 20:47:32,378 INFO L231 Difference]: Finished difference. Result has 461 places, 650 transitions, 8747 flow [2024-06-21 20:47:32,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7983, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8747, PETRI_PLACES=461, PETRI_TRANSITIONS=650} [2024-06-21 20:47:32,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-21 20:47:32,378 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 650 transitions, 8747 flow [2024-06-21 20:47:32,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:32,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:32,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:32,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:47:32,379 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)] === [2024-06-21 20:47:32,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1839182369, now seen corresponding path program 10 times [2024-06-21 20:47:32,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:32,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84686909] [2024-06-21 20:47:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:32,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:33,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:33,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84686909] [2024-06-21 20:47:33,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84686909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:33,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:33,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:33,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663400241] [2024-06-21 20:47:33,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:33,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:33,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:33,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:33,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:47:33,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 650 transitions, 8747 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:33,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:33,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:47:33,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:35,858 INFO L124 PetriNetUnfolderBase]: 4412/7242 cut-off events. [2024-06-21 20:47:35,858 INFO L125 PetriNetUnfolderBase]: For 2387467/2387477 co-relation queries the response was YES. [2024-06-21 20:47:35,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84865 conditions, 7242 events. 4412/7242 cut-off events. For 2387467/2387477 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 47800 event pairs, 821 based on Foata normal form. 3/7239 useless extension candidates. Maximal degree in co-relation 84641. Up to 6555 conditions per place. [2024-06-21 20:47:35,985 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 571 selfloop transitions, 69 changer transitions 0/671 dead transitions. [2024-06-21 20:47:35,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 671 transitions, 10613 flow [2024-06-21 20:47:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:47:35,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:47:35,986 INFO L175 Difference]: Start difference. First operand has 461 places, 650 transitions, 8747 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:47:35,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 671 transitions, 10613 flow [2024-06-21 20:47:43,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 671 transitions, 10389 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 20:47:43,169 INFO L231 Difference]: Finished difference. Result has 466 places, 653 transitions, 8817 flow [2024-06-21 20:47:43,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8531, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8817, PETRI_PLACES=466, PETRI_TRANSITIONS=653} [2024-06-21 20:47:43,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-21 20:47:43,169 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 653 transitions, 8817 flow [2024-06-21 20:47:43,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:43,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:43,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:43,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:47:43,170 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)] === [2024-06-21 20:47:43,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1615795557, now seen corresponding path program 1 times [2024-06-21 20:47:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884428458] [2024-06-21 20:47:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:44,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884428458] [2024-06-21 20:47:44,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884428458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:44,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:44,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:44,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632965437] [2024-06-21 20:47:44,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:44,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:44,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:44,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:44,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:47:44,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 653 transitions, 8817 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:44,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:44,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:47:44,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:46,292 INFO L124 PetriNetUnfolderBase]: 4436/7235 cut-off events. [2024-06-21 20:47:46,292 INFO L125 PetriNetUnfolderBase]: For 2425610/2425624 co-relation queries the response was YES. [2024-06-21 20:47:46,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85262 conditions, 7235 events. 4436/7235 cut-off events. For 2425610/2425624 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 47403 event pairs, 651 based on Foata normal form. 13/7207 useless extension candidates. Maximal degree in co-relation 85036. Up to 6490 conditions per place. [2024-06-21 20:47:46,437 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 592 selfloop transitions, 44 changer transitions 0/685 dead transitions. [2024-06-21 20:47:46,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 685 transitions, 10318 flow [2024-06-21 20:47:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:47:46,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 20:47:46,438 INFO L175 Difference]: Start difference. First operand has 466 places, 653 transitions, 8817 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:47:46,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 685 transitions, 10318 flow [2024-06-21 20:47:55,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 685 transitions, 9944 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-21 20:47:55,758 INFO L231 Difference]: Finished difference. Result has 467 places, 656 transitions, 8683 flow [2024-06-21 20:47:55,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8443, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8683, PETRI_PLACES=467, PETRI_TRANSITIONS=656} [2024-06-21 20:47:55,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-21 20:47:55,759 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 656 transitions, 8683 flow [2024-06-21 20:47:55,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:55,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:55,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:55,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:47:55,759 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)] === [2024-06-21 20:47:55,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1625061147, now seen corresponding path program 2 times [2024-06-21 20:47:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:55,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095660506] [2024-06-21 20:47:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:55,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:56,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:56,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095660506] [2024-06-21 20:47:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095660506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:56,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:56,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091957214] [2024-06-21 20:47:56,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:56,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:56,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:47:56,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 656 transitions, 8683 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:56,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:56,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:47:56,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:59,238 INFO L124 PetriNetUnfolderBase]: 4452/7259 cut-off events. [2024-06-21 20:47:59,238 INFO L125 PetriNetUnfolderBase]: For 2452385/2452399 co-relation queries the response was YES. [2024-06-21 20:47:59,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85495 conditions, 7259 events. 4452/7259 cut-off events. For 2452385/2452399 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 47694 event pairs, 808 based on Foata normal form. 13/7211 useless extension candidates. Maximal degree in co-relation 85269. Up to 6570 conditions per place. [2024-06-21 20:47:59,364 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 588 selfloop transitions, 46 changer transitions 0/683 dead transitions. [2024-06-21 20:47:59,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 683 transitions, 10172 flow [2024-06-21 20:47:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:47:59,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:47:59,365 INFO L175 Difference]: Start difference. First operand has 467 places, 656 transitions, 8683 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:47:59,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 683 transitions, 10172 flow [2024-06-21 20:48:06,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 683 transitions, 9954 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 20:48:06,969 INFO L231 Difference]: Finished difference. Result has 469 places, 659 transitions, 8715 flow [2024-06-21 20:48:06,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8715, PETRI_PLACES=469, PETRI_TRANSITIONS=659} [2024-06-21 20:48:06,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-21 20:48:06,970 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 659 transitions, 8715 flow [2024-06-21 20:48:06,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:06,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:06,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:06,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:48:06,970 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:06,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash -567885857, now seen corresponding path program 3 times [2024-06-21 20:48:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:06,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132668752] [2024-06-21 20:48:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:08,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:08,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132668752] [2024-06-21 20:48:08,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132668752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:08,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:08,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:08,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665480861] [2024-06-21 20:48:08,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:08,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:08,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:08,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:48:08,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 659 transitions, 8715 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:08,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:08,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:48:08,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:10,168 INFO L124 PetriNetUnfolderBase]: 4468/7283 cut-off events. [2024-06-21 20:48:10,168 INFO L125 PetriNetUnfolderBase]: For 2483147/2483161 co-relation queries the response was YES. [2024-06-21 20:48:10,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85984 conditions, 7283 events. 4468/7283 cut-off events. For 2483147/2483161 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 47849 event pairs, 806 based on Foata normal form. 13/7235 useless extension candidates. Maximal degree in co-relation 85757. Up to 6584 conditions per place. [2024-06-21 20:48:10,306 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 593 selfloop transitions, 45 changer transitions 0/687 dead transitions. [2024-06-21 20:48:10,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 687 transitions, 10220 flow [2024-06-21 20:48:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:48:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:48:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:48:10,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:48:10,307 INFO L175 Difference]: Start difference. First operand has 469 places, 659 transitions, 8715 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:48:10,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 687 transitions, 10220 flow [2024-06-21 20:48:18,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 687 transitions, 9992 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-21 20:48:18,486 INFO L231 Difference]: Finished difference. Result has 471 places, 662 transitions, 8741 flow [2024-06-21 20:48:18,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8487, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8741, PETRI_PLACES=471, PETRI_TRANSITIONS=662} [2024-06-21 20:48:18,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-21 20:48:18,487 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 662 transitions, 8741 flow [2024-06-21 20:48:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:18,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:18,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:18,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:48:18,487 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:18,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash -460783399, now seen corresponding path program 1 times [2024-06-21 20:48:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:18,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722752053] [2024-06-21 20:48:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:18,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:19,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:19,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722752053] [2024-06-21 20:48:19,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722752053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:19,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:19,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:19,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454682848] [2024-06-21 20:48:19,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:19,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:19,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:19,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:19,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 662 transitions, 8741 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:19,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:19,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:19,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:21,677 INFO L124 PetriNetUnfolderBase]: 4656/7520 cut-off events. [2024-06-21 20:48:21,677 INFO L125 PetriNetUnfolderBase]: For 2470119/2470119 co-relation queries the response was YES. [2024-06-21 20:48:21,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87659 conditions, 7520 events. 4656/7520 cut-off events. For 2470119/2470119 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 48728 event pairs, 855 based on Foata normal form. 1/7515 useless extension candidates. Maximal degree in co-relation 87431. Up to 6946 conditions per place. [2024-06-21 20:48:21,804 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 632 selfloop transitions, 53 changer transitions 0/690 dead transitions. [2024-06-21 20:48:21,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 690 transitions, 10301 flow [2024-06-21 20:48:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:48:21,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:48:21,805 INFO L175 Difference]: Start difference. First operand has 471 places, 662 transitions, 8741 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:48:21,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 690 transitions, 10301 flow [2024-06-21 20:48:30,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 690 transitions, 10069 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-21 20:48:30,044 INFO L231 Difference]: Finished difference. Result has 472 places, 665 transitions, 8736 flow [2024-06-21 20:48:30,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8509, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8736, PETRI_PLACES=472, PETRI_TRANSITIONS=665} [2024-06-21 20:48:30,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 428 predicate places. [2024-06-21 20:48:30,045 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 665 transitions, 8736 flow [2024-06-21 20:48:30,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:30,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:30,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:30,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:48:30,045 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:30,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1138325965, now seen corresponding path program 2 times [2024-06-21 20:48:30,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:30,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061416952] [2024-06-21 20:48:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:30,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:30,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:30,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061416952] [2024-06-21 20:48:30,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061416952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:30,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:30,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121876685] [2024-06-21 20:48:30,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:30,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:31,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:31,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 665 transitions, 8736 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) [2024-06-21 20:48:31,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:31,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:31,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:33,098 INFO L124 PetriNetUnfolderBase]: 4669/7540 cut-off events. [2024-06-21 20:48:33,098 INFO L125 PetriNetUnfolderBase]: For 2509414/2509414 co-relation queries the response was YES. [2024-06-21 20:48:33,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88042 conditions, 7540 events. 4669/7540 cut-off events. For 2509414/2509414 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 48836 event pairs, 855 based on Foata normal form. 1/7535 useless extension candidates. Maximal degree in co-relation 87813. Up to 6949 conditions per place. [2024-06-21 20:48:33,243 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 627 selfloop transitions, 62 changer transitions 0/694 dead transitions. [2024-06-21 20:48:33,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 694 transitions, 10731 flow [2024-06-21 20:48:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:48:33,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 20:48:33,244 INFO L175 Difference]: Start difference. First operand has 472 places, 665 transitions, 8736 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:48:33,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 694 transitions, 10731 flow [2024-06-21 20:48:42,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 694 transitions, 10541 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:42,081 INFO L231 Difference]: Finished difference. Result has 474 places, 671 transitions, 8912 flow [2024-06-21 20:48:42,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8912, PETRI_PLACES=474, PETRI_TRANSITIONS=671} [2024-06-21 20:48:42,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-21 20:48:42,082 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 671 transitions, 8912 flow [2024-06-21 20:48:42,082 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) [2024-06-21 20:48:42,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:42,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:42,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:48:42,082 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:42,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:42,083 INFO L85 PathProgramCache]: Analyzing trace with hash 988903726, now seen corresponding path program 1 times [2024-06-21 20:48:42,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:42,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108513769] [2024-06-21 20:48:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:42,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:42,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:42,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108513769] [2024-06-21 20:48:42,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108513769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:42,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:42,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365574246] [2024-06-21 20:48:42,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:42,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:42,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:42,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:42,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:42,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 671 transitions, 8912 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) [2024-06-21 20:48:42,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:42,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:42,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:45,529 INFO L124 PetriNetUnfolderBase]: 4689/7572 cut-off events. [2024-06-21 20:48:45,529 INFO L125 PetriNetUnfolderBase]: For 2578974/2578974 co-relation queries the response was YES. [2024-06-21 20:48:45,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88735 conditions, 7572 events. 4689/7572 cut-off events. For 2578974/2578974 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49143 event pairs, 857 based on Foata normal form. 4/7570 useless extension candidates. Maximal degree in co-relation 88505. Up to 6870 conditions per place. [2024-06-21 20:48:45,665 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 625 selfloop transitions, 72 changer transitions 0/702 dead transitions. [2024-06-21 20:48:45,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 702 transitions, 10592 flow [2024-06-21 20:48:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:48:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:48:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:48:45,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:48:45,666 INFO L175 Difference]: Start difference. First operand has 474 places, 671 transitions, 8912 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:48:45,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 702 transitions, 10592 flow [2024-06-21 20:48:54,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 702 transitions, 10429 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:54,742 INFO L231 Difference]: Finished difference. Result has 479 places, 675 transitions, 9080 flow [2024-06-21 20:48:54,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8749, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9080, PETRI_PLACES=479, PETRI_TRANSITIONS=675} [2024-06-21 20:48:54,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-21 20:48:54,742 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 675 transitions, 9080 flow [2024-06-21 20:48:54,742 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) [2024-06-21 20:48:54,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:54,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:54,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:48:54,743 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:54,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:54,743 INFO L85 PathProgramCache]: Analyzing trace with hash 988695189, now seen corresponding path program 3 times [2024-06-21 20:48:54,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:54,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292282670] [2024-06-21 20:48:54,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:54,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:55,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:55,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292282670] [2024-06-21 20:48:55,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292282670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:55,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:55,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:55,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890782402] [2024-06-21 20:48:55,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:55,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:55,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:55,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:55,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:55,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:48:55,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 675 transitions, 9080 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:55,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:55,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:48:55,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:58,112 INFO L124 PetriNetUnfolderBase]: 4694/7579 cut-off events. [2024-06-21 20:48:58,112 INFO L125 PetriNetUnfolderBase]: For 2580948/2580948 co-relation queries the response was YES. [2024-06-21 20:48:58,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89911 conditions, 7579 events. 4694/7579 cut-off events. For 2580948/2580948 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49258 event pairs, 853 based on Foata normal form. 1/7574 useless extension candidates. Maximal degree in co-relation 89679. Up to 6999 conditions per place. [2024-06-21 20:48:58,385 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 645 selfloop transitions, 50 changer transitions 0/700 dead transitions. [2024-06-21 20:48:58,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 700 transitions, 10655 flow [2024-06-21 20:48:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:48:58,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:48:58,386 INFO L175 Difference]: Start difference. First operand has 479 places, 675 transitions, 9080 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:48:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 700 transitions, 10655 flow [2024-06-21 20:49:05,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 700 transitions, 10409 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:05,111 INFO L231 Difference]: Finished difference. Result has 481 places, 678 transitions, 9063 flow [2024-06-21 20:49:05,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8834, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9063, PETRI_PLACES=481, PETRI_TRANSITIONS=678} [2024-06-21 20:49:05,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-21 20:49:05,111 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 678 transitions, 9063 flow [2024-06-21 20:49:05,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:05,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:05,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:05,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:49:05,112 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:05,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash 989053456, now seen corresponding path program 2 times [2024-06-21 20:49:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:05,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226074270] [2024-06-21 20:49:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:05,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:05,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:05,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226074270] [2024-06-21 20:49:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226074270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:05,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558379093] [2024-06-21 20:49:05,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:05,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:05,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:06,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:49:06,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 678 transitions, 9063 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) [2024-06-21 20:49:06,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:06,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:49:06,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:08,708 INFO L124 PetriNetUnfolderBase]: 4714/7611 cut-off events. [2024-06-21 20:49:08,708 INFO L125 PetriNetUnfolderBase]: For 2654708/2654708 co-relation queries the response was YES. [2024-06-21 20:49:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90209 conditions, 7611 events. 4714/7611 cut-off events. For 2654708/2654708 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 49457 event pairs, 857 based on Foata normal form. 4/7609 useless extension candidates. Maximal degree in co-relation 89977. Up to 6887 conditions per place. [2024-06-21 20:49:08,840 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 623 selfloop transitions, 79 changer transitions 0/707 dead transitions. [2024-06-21 20:49:08,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 707 transitions, 10783 flow [2024-06-21 20:49:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:49:08,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:49:08,841 INFO L175 Difference]: Start difference. First operand has 481 places, 678 transitions, 9063 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:49:08,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 707 transitions, 10783 flow [2024-06-21 20:49:15,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 707 transitions, 10597 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:15,976 INFO L231 Difference]: Finished difference. Result has 484 places, 682 transitions, 9230 flow [2024-06-21 20:49:15,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8877, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9230, PETRI_PLACES=484, PETRI_TRANSITIONS=682} [2024-06-21 20:49:15,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-21 20:49:15,977 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 682 transitions, 9230 flow [2024-06-21 20:49:15,977 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) [2024-06-21 20:49:15,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:15,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:15,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:49:15,977 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:15,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:15,977 INFO L85 PathProgramCache]: Analyzing trace with hash 989053673, now seen corresponding path program 1 times [2024-06-21 20:49:15,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:15,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796361085] [2024-06-21 20:49:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:15,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:16,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:16,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796361085] [2024-06-21 20:49:16,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796361085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:16,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:16,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:16,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98044578] [2024-06-21 20:49:16,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:16,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:16,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:16,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:16,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:49:16,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 682 transitions, 9230 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) [2024-06-21 20:49:16,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:16,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:49:16,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:19,618 INFO L124 PetriNetUnfolderBase]: 4724/7625 cut-off events. [2024-06-21 20:49:19,619 INFO L125 PetriNetUnfolderBase]: For 2671491/2671491 co-relation queries the response was YES. [2024-06-21 20:49:19,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91404 conditions, 7625 events. 4724/7625 cut-off events. For 2671491/2671491 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 49605 event pairs, 851 based on Foata normal form. 2/7621 useless extension candidates. Maximal degree in co-relation 91171. Up to 7032 conditions per place. [2024-06-21 20:49:19,761 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 650 selfloop transitions, 54 changer transitions 0/709 dead transitions. [2024-06-21 20:49:19,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 709 transitions, 10870 flow [2024-06-21 20:49:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:49:19,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 20:49:19,762 INFO L175 Difference]: Start difference. First operand has 484 places, 682 transitions, 9230 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:49:19,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 709 transitions, 10870 flow [2024-06-21 20:49:27,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 709 transitions, 10555 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:27,603 INFO L231 Difference]: Finished difference. Result has 486 places, 686 transitions, 9198 flow [2024-06-21 20:49:27,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8915, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9198, PETRI_PLACES=486, PETRI_TRANSITIONS=686} [2024-06-21 20:49:27,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-21 20:49:27,604 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 686 transitions, 9198 flow [2024-06-21 20:49:27,604 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) [2024-06-21 20:49:27,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:27,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:27,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:49:27,604 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:27,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -530583323, now seen corresponding path program 4 times [2024-06-21 20:49:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968843088] [2024-06-21 20:49:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:28,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:28,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968843088] [2024-06-21 20:49:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968843088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:28,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:28,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:49:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691676883] [2024-06-21 20:49:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:28,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:49:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:49:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:49:28,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:49:28,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 686 transitions, 9198 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:28,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:28,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:49:28,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:31,076 INFO L124 PetriNetUnfolderBase]: 4729/7634 cut-off events. [2024-06-21 20:49:31,077 INFO L125 PetriNetUnfolderBase]: For 2688466/2688466 co-relation queries the response was YES. [2024-06-21 20:49:31,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91726 conditions, 7634 events. 4729/7634 cut-off events. For 2688466/2688466 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 49598 event pairs, 851 based on Foata normal form. 1/7629 useless extension candidates. Maximal degree in co-relation 91492. Up to 7031 conditions per place. [2024-06-21 20:49:31,215 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 642 selfloop transitions, 61 changer transitions 0/708 dead transitions. [2024-06-21 20:49:31,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 708 transitions, 10783 flow [2024-06-21 20:49:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:49:31,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:49:31,216 INFO L175 Difference]: Start difference. First operand has 486 places, 686 transitions, 9198 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:49:31,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 708 transitions, 10783 flow [2024-06-21 20:49:39,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 708 transitions, 10528 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:39,953 INFO L231 Difference]: Finished difference. Result has 487 places, 689 transitions, 9199 flow [2024-06-21 20:49:39,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8943, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9199, PETRI_PLACES=487, PETRI_TRANSITIONS=689} [2024-06-21 20:49:39,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-21 20:49:39,954 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 689 transitions, 9199 flow [2024-06-21 20:49:39,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:39,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:39,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:39,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:49:39,954 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:39,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:39,954 INFO L85 PathProgramCache]: Analyzing trace with hash -530381296, now seen corresponding path program 3 times [2024-06-21 20:49:39,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:39,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502343528] [2024-06-21 20:49:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:39,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502343528] [2024-06-21 20:49:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502343528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:40,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:40,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:40,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541323656] [2024-06-21 20:49:40,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:40,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:40,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:40,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:49:40,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 689 transitions, 9199 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) [2024-06-21 20:49:40,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:40,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:49:40,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:43,491 INFO L124 PetriNetUnfolderBase]: 4749/7666 cut-off events. [2024-06-21 20:49:43,491 INFO L125 PetriNetUnfolderBase]: For 2763781/2763781 co-relation queries the response was YES. [2024-06-21 20:49:43,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92336 conditions, 7666 events. 4749/7666 cut-off events. For 2763781/2763781 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 49898 event pairs, 855 based on Foata normal form. 4/7664 useless extension candidates. Maximal degree in co-relation 92101. Up to 6908 conditions per place. [2024-06-21 20:49:43,735 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 623 selfloop transitions, 88 changer transitions 0/716 dead transitions. [2024-06-21 20:49:43,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 716 transitions, 10943 flow [2024-06-21 20:49:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:49:43,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 20:49:43,737 INFO L175 Difference]: Start difference. First operand has 487 places, 689 transitions, 9199 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:49:43,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 716 transitions, 10943 flow [2024-06-21 20:49:53,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 716 transitions, 10726 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:53,188 INFO L231 Difference]: Finished difference. Result has 490 places, 693 transitions, 9365 flow [2024-06-21 20:49:53,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8982, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9365, PETRI_PLACES=490, PETRI_TRANSITIONS=693} [2024-06-21 20:49:53,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-21 20:49:53,188 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 693 transitions, 9365 flow [2024-06-21 20:49:53,189 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) [2024-06-21 20:49:53,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:53,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:53,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 20:49:53,189 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:53,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash 994617863, now seen corresponding path program 2 times [2024-06-21 20:49:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:53,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53075191] [2024-06-21 20:49:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:53,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:54,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:54,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53075191] [2024-06-21 20:49:54,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53075191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:54,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:54,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34748685] [2024-06-21 20:49:54,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:54,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:54,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:54,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:49:54,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 693 transitions, 9365 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) [2024-06-21 20:49:54,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:54,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:49:54,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:56,821 INFO L124 PetriNetUnfolderBase]: 4759/7678 cut-off events. [2024-06-21 20:49:56,821 INFO L125 PetriNetUnfolderBase]: For 2781189/2781189 co-relation queries the response was YES. [2024-06-21 20:49:56,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93541 conditions, 7678 events. 4759/7678 cut-off events. For 2781189/2781189 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 49887 event pairs, 851 based on Foata normal form. 2/7674 useless extension candidates. Maximal degree in co-relation 93305. Up to 7065 conditions per place. [2024-06-21 20:49:56,965 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 653 selfloop transitions, 60 changer transitions 0/718 dead transitions. [2024-06-21 20:49:56,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 718 transitions, 11029 flow [2024-06-21 20:49:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:49:56,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 20:49:56,966 INFO L175 Difference]: Start difference. First operand has 490 places, 693 transitions, 9365 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:49:56,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 718 transitions, 11029 flow [2024-06-21 20:50:05,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 718 transitions, 10684 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:05,138 INFO L231 Difference]: Finished difference. Result has 492 places, 697 transitions, 9327 flow [2024-06-21 20:50:05,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9020, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9327, PETRI_PLACES=492, PETRI_TRANSITIONS=697} [2024-06-21 20:50:05,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 448 predicate places. [2024-06-21 20:50:05,139 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 697 transitions, 9327 flow [2024-06-21 20:50:05,139 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) [2024-06-21 20:50:05,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:05,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:05,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 20:50:05,139 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:05,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:05,139 INFO L85 PathProgramCache]: Analyzing trace with hash 994611849, now seen corresponding path program 5 times [2024-06-21 20:50:05,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:05,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409664985] [2024-06-21 20:50:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:05,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409664985] [2024-06-21 20:50:06,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409664985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312699919] [2024-06-21 20:50:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:06,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:50:06,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 697 transitions, 9327 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) [2024-06-21 20:50:06,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:06,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:50:06,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:08,644 INFO L124 PetriNetUnfolderBase]: 4764/7687 cut-off events. [2024-06-21 20:50:08,644 INFO L125 PetriNetUnfolderBase]: For 2798797/2798797 co-relation queries the response was YES. [2024-06-21 20:50:08,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93825 conditions, 7687 events. 4764/7687 cut-off events. For 2798797/2798797 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 50006 event pairs, 851 based on Foata normal form. 1/7682 useless extension candidates. Maximal degree in co-relation 93588. Up to 6993 conditions per place. [2024-06-21 20:50:08,785 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 614 selfloop transitions, 99 changer transitions 0/718 dead transitions. [2024-06-21 20:50:08,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 718 transitions, 11592 flow [2024-06-21 20:50:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:50:08,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 20:50:08,786 INFO L175 Difference]: Start difference. First operand has 492 places, 697 transitions, 9327 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:50:08,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 718 transitions, 11592 flow [2024-06-21 20:50:17,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 718 transitions, 11313 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:17,900 INFO L231 Difference]: Finished difference. Result has 493 places, 700 transitions, 9379 flow [2024-06-21 20:50:17,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9048, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9379, PETRI_PLACES=493, PETRI_TRANSITIONS=700} [2024-06-21 20:50:17,901 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-21 20:50:17,901 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 700 transitions, 9379 flow [2024-06-21 20:50:17,901 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) [2024-06-21 20:50:17,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:17,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:17,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 20:50:17,901 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:17,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash 994625582, now seen corresponding path program 1 times [2024-06-21 20:50:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:17,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454344879] [2024-06-21 20:50:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:19,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:19,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454344879] [2024-06-21 20:50:19,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454344879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:19,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:19,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142592052] [2024-06-21 20:50:19,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:19,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:19,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:19,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:50:19,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 700 transitions, 9379 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:19,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:19,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:50:19,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:21,755 INFO L124 PetriNetUnfolderBase]: 4603/7485 cut-off events. [2024-06-21 20:50:21,755 INFO L125 PetriNetUnfolderBase]: For 2875894/2875910 co-relation queries the response was YES. [2024-06-21 20:50:21,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92925 conditions, 7485 events. 4603/7485 cut-off events. For 2875894/2875910 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49268 event pairs, 808 based on Foata normal form. 15/7439 useless extension candidates. Maximal degree in co-relation 92687. Up to 6749 conditions per place. [2024-06-21 20:50:21,894 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 624 selfloop transitions, 47 changer transitions 0/728 dead transitions. [2024-06-21 20:50:21,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 728 transitions, 11036 flow [2024-06-21 20:50:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:50:21,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 20:50:21,895 INFO L175 Difference]: Start difference. First operand has 493 places, 700 transitions, 9379 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:50:21,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 728 transitions, 11036 flow [2024-06-21 20:50:29,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 728 transitions, 10626 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 20:50:29,760 INFO L231 Difference]: Finished difference. Result has 494 places, 707 transitions, 9332 flow [2024-06-21 20:50:29,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8969, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9332, PETRI_PLACES=494, PETRI_TRANSITIONS=707} [2024-06-21 20:50:29,760 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 450 predicate places. [2024-06-21 20:50:29,760 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 707 transitions, 9332 flow [2024-06-21 20:50:29,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:29,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:29,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:29,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 20:50:29,761 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:29,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:29,761 INFO L85 PathProgramCache]: Analyzing trace with hash -530373639, now seen corresponding path program 3 times [2024-06-21 20:50:29,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:29,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320364420] [2024-06-21 20:50:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:29,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:30,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:30,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320364420] [2024-06-21 20:50:30,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320364420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:30,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:30,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:30,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417301259] [2024-06-21 20:50:30,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:30,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:30,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:30,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:30,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:30,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:50:30,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 707 transitions, 9332 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) [2024-06-21 20:50:30,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:30,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:50:30,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:33,339 INFO L124 PetriNetUnfolderBase]: 4794/7729 cut-off events. [2024-06-21 20:50:33,339 INFO L125 PetriNetUnfolderBase]: For 2876943/2876943 co-relation queries the response was YES. [2024-06-21 20:50:33,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94380 conditions, 7729 events. 4794/7729 cut-off events. For 2876943/2876943 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 50246 event pairs, 853 based on Foata normal form. 2/7725 useless extension candidates. Maximal degree in co-relation 94143. Up to 7096 conditions per place. [2024-06-21 20:50:33,482 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 656 selfloop transitions, 71 changer transitions 0/732 dead transitions. [2024-06-21 20:50:33,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 732 transitions, 11032 flow [2024-06-21 20:50:33,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:50:33,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 20:50:33,483 INFO L175 Difference]: Start difference. First operand has 494 places, 707 transitions, 9332 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:50:33,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 732 transitions, 11032 flow [2024-06-21 20:50:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 732 transitions, 10760 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:41,421 INFO L231 Difference]: Finished difference. Result has 496 places, 711 transitions, 9397 flow [2024-06-21 20:50:41,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9060, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9397, PETRI_PLACES=496, PETRI_TRANSITIONS=711} [2024-06-21 20:50:41,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 452 predicate places. [2024-06-21 20:50:41,422 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 711 transitions, 9397 flow [2024-06-21 20:50:41,422 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) [2024-06-21 20:50:41,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:41,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:41,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 20:50:41,422 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:41,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:41,423 INFO L85 PathProgramCache]: Analyzing trace with hash 994617429, now seen corresponding path program 6 times [2024-06-21 20:50:41,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:41,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842235375] [2024-06-21 20:50:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:41,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:42,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:42,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842235375] [2024-06-21 20:50:42,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842235375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:42,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:42,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:42,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389440851] [2024-06-21 20:50:42,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:42,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:42,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:42,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:42,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:50:42,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 711 transitions, 9397 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) [2024-06-21 20:50:42,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:42,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:50:42,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:44,866 INFO L124 PetriNetUnfolderBase]: 4799/7738 cut-off events. [2024-06-21 20:50:44,866 INFO L125 PetriNetUnfolderBase]: For 2903814/2903814 co-relation queries the response was YES. [2024-06-21 20:50:45,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95049 conditions, 7738 events. 4799/7738 cut-off events. For 2903814/2903814 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 50269 event pairs, 853 based on Foata normal form. 1/7733 useless extension candidates. Maximal degree in co-relation 94811. Up to 7041 conditions per place. [2024-06-21 20:50:45,145 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 628 selfloop transitions, 98 changer transitions 0/731 dead transitions. [2024-06-21 20:50:45,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 731 transitions, 11352 flow [2024-06-21 20:50:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:50:45,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 20:50:45,146 INFO L175 Difference]: Start difference. First operand has 496 places, 711 transitions, 9397 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:50:45,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 731 transitions, 11352 flow [2024-06-21 20:50:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 731 transitions, 11043 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:55,643 INFO L231 Difference]: Finished difference. Result has 497 places, 714 transitions, 9409 flow [2024-06-21 20:50:55,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9088, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9409, PETRI_PLACES=497, PETRI_TRANSITIONS=714} [2024-06-21 20:50:55,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 453 predicate places. [2024-06-21 20:50:55,644 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 714 transitions, 9409 flow [2024-06-21 20:50:55,644 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) [2024-06-21 20:50:55,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:55,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:55,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 20:50:55,644 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:55,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash -264349650, now seen corresponding path program 2 times [2024-06-21 20:50:55,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:55,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161468017] [2024-06-21 20:50:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:55,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:56,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:56,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161468017] [2024-06-21 20:50:56,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161468017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:56,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:56,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:56,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469444189] [2024-06-21 20:50:56,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:56,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:56,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:56,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:56,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 20:50:56,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 714 transitions, 9409 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:56,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:56,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 20:50:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:59,251 INFO L124 PetriNetUnfolderBase]: 4640/7541 cut-off events. [2024-06-21 20:50:59,251 INFO L125 PetriNetUnfolderBase]: For 2982982/2982998 co-relation queries the response was YES. [2024-06-21 20:50:59,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94142 conditions, 7541 events. 4640/7541 cut-off events. For 2982982/2982998 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 49659 event pairs, 804 based on Foata normal form. 15/7495 useless extension candidates. Maximal degree in co-relation 93903. Up to 6588 conditions per place. [2024-06-21 20:50:59,395 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 574 selfloop transitions, 108 changer transitions 0/741 dead transitions. [2024-06-21 20:50:59,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 741 transitions, 11518 flow [2024-06-21 20:50:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:50:59,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 20:50:59,396 INFO L175 Difference]: Start difference. First operand has 497 places, 714 transitions, 9409 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:50:59,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 741 transitions, 11518 flow [2024-06-21 20:51:07,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 741 transitions, 11284 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 20:51:07,305 INFO L231 Difference]: Finished difference. Result has 502 places, 722 transitions, 9805 flow [2024-06-21 20:51:07,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9175, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9805, PETRI_PLACES=502, PETRI_TRANSITIONS=722} [2024-06-21 20:51:07,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 458 predicate places. [2024-06-21 20:51:07,306 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 722 transitions, 9805 flow [2024-06-21 20:51:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:07,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:07,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 20:51:07,306 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:51:07,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash 405908375, now seen corresponding path program 4 times [2024-06-21 20:51:07,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:07,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390273942] [2024-06-21 20:51:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:07,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:08,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:08,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390273942] [2024-06-21 20:51:08,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390273942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:08,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:08,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:08,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133528356] [2024-06-21 20:51:08,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:08,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:08,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:08,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:08,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:08,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 20:51:08,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 722 transitions, 9805 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) [2024-06-21 20:51:08,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:08,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 20:51:08,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:11,195 INFO L124 PetriNetUnfolderBase]: 4847/7805 cut-off events. [2024-06-21 20:51:11,196 INFO L125 PetriNetUnfolderBase]: For 3019095/3019095 co-relation queries the response was YES. [2024-06-21 20:51:11,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97005 conditions, 7805 events. 4847/7805 cut-off events. For 3019095/3019095 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 50736 event pairs, 853 based on Foata normal form. 2/7801 useless extension candidates. Maximal degree in co-relation 96764. Up to 7088 conditions per place. [2024-06-21 20:51:11,368 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 638 selfloop transitions, 106 changer transitions 0/749 dead transitions. [2024-06-21 20:51:11,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 749 transitions, 12403 flow [2024-06-21 20:51:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:51:11,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 20:51:11,381 INFO L175 Difference]: Start difference. First operand has 502 places, 722 transitions, 9805 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:51:11,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 749 transitions, 12403 flow