./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix039.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/protection/mix039.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/mix039.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix039.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 16:52:12,641 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:52:12,739 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:52:12,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:52:12,744 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:52:12,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:52:12,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:52:12,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:52:12,790 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:52:12,791 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:52:12,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:52:12,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:52:12,793 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:52:12,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:52:12,797 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:52:12,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:52:12,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:52:12,798 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:52:12,799 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:52:12,799 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:52:12,799 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:52:12,800 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:52:12,800 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:52:12,800 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:52:12,801 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:52:12,801 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:52:12,801 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:52:12,801 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:52:12,802 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:52:12,802 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:52:12,803 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:52:12,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:52:12,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:52:12,804 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:52:12,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:52:12,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:52:12,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:52:12,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:52:12,805 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:52:12,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:52:12,806 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:52:12,806 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:52:12,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:52:12,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:52:13,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:52:13,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:52:13,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:52:13,056 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:52:13,057 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:52:13,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix039.opt.i [2024-06-21 16:52:14,156 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:52:14,416 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:52:14,431 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix039.opt.i [2024-06-21 16:52:14,454 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/194e14a49/ceb405c63157433e91fc5e93876df2db/FLAGfd64cf66d [2024-06-21 16:52:14,466 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/194e14a49/ceb405c63157433e91fc5e93876df2db [2024-06-21 16:52:14,468 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:52:14,469 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:52:14,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix039.opt.yml/witness.yml [2024-06-21 16:52:14,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:52:14,712 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:52:14,715 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:52:14,715 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:52:14,719 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:52:14,720 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:52:14" (1/2) ... [2024-06-21 16:52:14,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a85a12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:52:14, skipping insertion in model container [2024-06-21 16:52:14,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:52:14" (1/2) ... [2024-06-21 16:52:14,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31ab1b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:52:14, skipping insertion in model container [2024-06-21 16:52:14,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:52:14" (2/2) ... [2024-06-21 16:52:14,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a85a12a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:14, skipping insertion in model container [2024-06-21 16:52:14,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:52:14" (2/2) ... [2024-06-21 16:52:14,723 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:52:14,865 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:52:14,867 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-21 16:52:14,867 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-21 16:52:14,868 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-21 16:52:14,868 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-21 16:52:14,868 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:52:14,869 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-21 16:52:14,913 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:52:15,270 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:52:15,278 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:52:15,397 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:52:15,435 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:52:15,435 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15 WrapperNode [2024-06-21 16:52:15,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:52:15,436 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:52:15,436 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:52:15,437 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:52:15,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,494 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 146 [2024-06-21 16:52:15,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:52:15,496 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:52:15,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:52:15,496 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:52:15,506 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,510 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,530 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 16:52:15,531 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,531 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,542 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:52:15,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:52:15,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:52:15,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:52:15,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (1/1) ... [2024-06-21 16:52:15,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:52:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:52:15,606 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 16:52:15,628 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 16:52:15,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:52:15,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:52:15,644 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:52:15,644 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:52:15,644 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:52:15,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:52:15,645 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:52:15,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:52:15,645 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:52:15,646 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:52:15,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:52:15,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:52:15,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:52:15,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:52:15,649 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 16:52:15,794 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:52:15,796 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:52:16,128 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:52:16,128 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:52:16,304 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:52:16,304 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:52:16,304 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:52:16 BoogieIcfgContainer [2024-06-21 16:52:16,304 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:52:16,308 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:52:16,308 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:52:16,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:52:16,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:52:14" (1/4) ... [2024-06-21 16:52:16,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11dbc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:52:16, skipping insertion in model container [2024-06-21 16:52:16,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:52:14" (2/4) ... [2024-06-21 16:52:16,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11dbc90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:52:16, skipping insertion in model container [2024-06-21 16:52:16,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:52:15" (3/4) ... [2024-06-21 16:52:16,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11dbc90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:52:16, skipping insertion in model container [2024-06-21 16:52:16,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:52:16" (4/4) ... [2024-06-21 16:52:16,313 INFO L112 eAbstractionObserver]: Analyzing ICFG mix039.opt.i [2024-06-21 16:52:16,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:52:16,329 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:52:16,329 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:52:16,384 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:52:16,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:52:16,473 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 16:52:16,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:52:16,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:52:16,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 16:52:16,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 16:52:16,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:52:16,492 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;@3773b125, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:52:16,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:52:16,496 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:52:16,496 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:52:16,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:52:16,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:16,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:52:16,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:16,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash 384691786, now seen corresponding path program 1 times [2024-06-21 16:52:16,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:16,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135307770] [2024-06-21 16:52:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:16,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:17,578 INFO 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 16:52:17,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135307770] [2024-06-21 16:52:17,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135307770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:17,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:17,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:52:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555740211] [2024-06-21 16:52:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:17,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:52:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:17,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:52:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:52:17,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-21 16:52:17,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:17,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:17,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-21 16:52:17,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:18,944 INFO L124 PetriNetUnfolderBase]: 6197/8949 cut-off events. [2024-06-21 16:52:18,945 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-21 16:52:18,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17695 conditions, 8949 events. 6197/8949 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 51807 event pairs, 4558 based on Foata normal form. 1/8642 useless extension candidates. Maximal degree in co-relation 17682. Up to 8479 conditions per place. [2024-06-21 16:52:19,004 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 16:52:19,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-21 16:52:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:52:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:52:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-21 16:52:19,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540880503144654 [2024-06-21 16:52:19,018 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 104 transitions. [2024-06-21 16:52:19,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-21 16:52:19,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:52:19,028 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 16:52:19,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 16:52:19,033 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 16:52:19,033 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 16:52:19,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:19,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:19,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:19,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:52:19,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:19,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash 323025033, now seen corresponding path program 1 times [2024-06-21 16:52:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:19,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489716641] [2024-06-21 16:52:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:19,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489716641] [2024-06-21 16:52:19,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489716641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:19,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:19,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:52:19,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702344360] [2024-06-21 16:52:19,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:19,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:52:19,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:19,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:52:19,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:52:19,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-21 16:52:19,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:19,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:19,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-21 16:52:19,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:21,078 INFO L124 PetriNetUnfolderBase]: 7092/9982 cut-off events. [2024-06-21 16:52:21,078 INFO L125 PetriNetUnfolderBase]: For 1997/1997 co-relation queries the response was YES. [2024-06-21 16:52:21,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 9982 events. 7092/9982 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 56301 event pairs, 4490 based on Foata normal form. 4/9825 useless extension candidates. Maximal degree in co-relation 22697. Up to 9649 conditions per place. [2024-06-21 16:52:21,139 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 16:52:21,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-21 16:52:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:52:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:52:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-21 16:52:21,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-21 16:52:21,142 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-21 16:52:21,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-21 16:52:21,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:52:21,145 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 16:52:21,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 16:52:21,146 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 16:52:21,146 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 16:52:21,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:21,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:21,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:21,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:52:21,147 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:21,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1782198516, now seen corresponding path program 1 times [2024-06-21 16:52:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:21,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33559223] [2024-06-21 16:52:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:22,195 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 16:52:22,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:22,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33559223] [2024-06-21 16:52:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33559223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:22,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:22,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:52:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977937319] [2024-06-21 16:52:22,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:22,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:52:22,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:52:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:52:22,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:52:22,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 16:52:22,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:22,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:52:22,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:23,772 INFO L124 PetriNetUnfolderBase]: 9006/12594 cut-off events. [2024-06-21 16:52:23,772 INFO L125 PetriNetUnfolderBase]: For 6795/6795 co-relation queries the response was YES. [2024-06-21 16:52:23,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31737 conditions, 12594 events. 9006/12594 cut-off events. For 6795/6795 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 69754 event pairs, 4478 based on Foata normal form. 8/12399 useless extension candidates. Maximal degree in co-relation 31723. Up to 12137 conditions per place. [2024-06-21 16:52:23,873 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-21 16:52:23,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 486 flow [2024-06-21 16:52:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:52:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:52:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-21 16:52:23,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-21 16:52:23,880 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 186 transitions. [2024-06-21 16:52:23,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 486 flow [2024-06-21 16:52:23,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 458 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 16:52:23,886 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-21 16:52:23,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-21 16:52:23,887 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-21 16:52:23,887 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-21 16:52:23,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 16:52:23,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:23,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:23,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:52:23,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:23,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash -288351049, now seen corresponding path program 1 times [2024-06-21 16:52:23,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:23,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046682068] [2024-06-21 16:52:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:23,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:24,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:24,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046682068] [2024-06-21 16:52:24,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046682068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:24,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:24,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:52:24,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28260967] [2024-06-21 16:52:24,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:24,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:52:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:52:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:52:25,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:52:25,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 16:52:25,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:25,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:52:25,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:26,572 INFO L124 PetriNetUnfolderBase]: 7847/11280 cut-off events. [2024-06-21 16:52:26,572 INFO L125 PetriNetUnfolderBase]: For 11293/11293 co-relation queries the response was YES. [2024-06-21 16:52:26,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31080 conditions, 11280 events. 7847/11280 cut-off events. For 11293/11293 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 64605 event pairs, 4266 based on Foata normal form. 3/11080 useless extension candidates. Maximal degree in co-relation 31063. Up to 10669 conditions per place. [2024-06-21 16:52:26,648 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-21 16:52:26,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 447 flow [2024-06-21 16:52:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:52:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:52:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-21 16:52:26,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-21 16:52:26,650 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 136 transitions. [2024-06-21 16:52:26,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 447 flow [2024-06-21 16:52:26,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:52:26,660 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-21 16:52:26,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-21 16:52:26,662 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-21 16:52:26,662 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-21 16:52:26,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 16:52:26,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:26,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:26,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:52:26,663 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:26,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:26,664 INFO L85 PathProgramCache]: Analyzing trace with hash -361458903, now seen corresponding path program 1 times [2024-06-21 16:52:26,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:26,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156421398] [2024-06-21 16:52:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:26,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:27,635 INFO 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 16:52:27,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:27,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156421398] [2024-06-21 16:52:27,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156421398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:27,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:27,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:52:27,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424910453] [2024-06-21 16:52:27,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:27,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:52:27,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:27,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:52:27,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:52:27,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:52:27,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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 16:52:27,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:27,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:52:27,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:29,474 INFO L124 PetriNetUnfolderBase]: 7880/11630 cut-off events. [2024-06-21 16:52:29,474 INFO L125 PetriNetUnfolderBase]: For 17923/17923 co-relation queries the response was YES. [2024-06-21 16:52:29,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34282 conditions, 11630 events. 7880/11630 cut-off events. For 17923/17923 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 69472 event pairs, 4072 based on Foata normal form. 7/11599 useless extension candidates. Maximal degree in co-relation 34263. Up to 10583 conditions per place. [2024-06-21 16:52:29,551 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 75 selfloop transitions, 22 changer transitions 0/106 dead transitions. [2024-06-21 16:52:29,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 648 flow [2024-06-21 16:52:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:52:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:52:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 16:52:29,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440251572327044 [2024-06-21 16:52:29,555 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 173 transitions. [2024-06-21 16:52:29,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 648 flow [2024-06-21 16:52:29,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 619 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:52:29,564 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 407 flow [2024-06-21 16:52:29,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-21 16:52:29,572 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-21 16:52:29,572 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 407 flow [2024-06-21 16:52:29,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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 16:52:29,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:29,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:29,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:52:29,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:29,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1534100530, now seen corresponding path program 1 times [2024-06-21 16:52:29,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:29,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977385833] [2024-06-21 16:52:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:29,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:30,569 INFO 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 16:52:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:30,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977385833] [2024-06-21 16:52:30,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977385833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:30,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:30,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:52:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021088507] [2024-06-21 16:52:30,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:30,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:52:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:52:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:52:30,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:30,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:30,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:30,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:30,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:32,108 INFO L124 PetriNetUnfolderBase]: 9052/12861 cut-off events. [2024-06-21 16:52:32,108 INFO L125 PetriNetUnfolderBase]: For 33928/33940 co-relation queries the response was YES. [2024-06-21 16:52:32,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43822 conditions, 12861 events. 9052/12861 cut-off events. For 33928/33940 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72963 event pairs, 4652 based on Foata normal form. 11/12849 useless extension candidates. Maximal degree in co-relation 43800. Up to 12214 conditions per place. [2024-06-21 16:52:32,199 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 84 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-21 16:52:32,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 791 flow [2024-06-21 16:52:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:52:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:52:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 16:52:32,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-21 16:52:32,201 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 407 flow. Second operand 6 states and 165 transitions. [2024-06-21 16:52:32,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 791 flow [2024-06-21 16:52:32,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 769 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 16:52:32,216 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 514 flow [2024-06-21 16:52:32,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-21 16:52:32,219 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-21 16:52:32,219 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 514 flow [2024-06-21 16:52:32,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:32,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:32,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:52:32,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:32,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2080954004, now seen corresponding path program 2 times [2024-06-21 16:52:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:32,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677875838] [2024-06-21 16:52:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:32,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:33,081 INFO 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 16:52:33,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:33,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677875838] [2024-06-21 16:52:33,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677875838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:33,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:33,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:52:33,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893497168] [2024-06-21 16:52:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:33,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:52:33,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:33,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:52:33,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:52:33,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:33,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:33,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:33,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:33,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:34,657 INFO L124 PetriNetUnfolderBase]: 9043/12850 cut-off events. [2024-06-21 16:52:34,657 INFO L125 PetriNetUnfolderBase]: For 45609/45618 co-relation queries the response was YES. [2024-06-21 16:52:34,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46938 conditions, 12850 events. 9043/12850 cut-off events. For 45609/45618 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72917 event pairs, 4655 based on Foata normal form. 9/12835 useless extension candidates. Maximal degree in co-relation 46913. Up to 12205 conditions per place. [2024-06-21 16:52:34,740 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 78 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-21 16:52:34,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 774 flow [2024-06-21 16:52:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:52:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:52:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:52:34,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:52:34,743 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 514 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:52:34,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 774 flow [2024-06-21 16:52:34,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 716 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 16:52:34,779 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 509 flow [2024-06-21 16:52:34,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-21 16:52:34,781 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-21 16:52:34,781 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 509 flow [2024-06-21 16:52:34,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:34,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:34,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:34,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:52:34,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:34,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1635760186, now seen corresponding path program 1 times [2024-06-21 16:52:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:34,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614955420] [2024-06-21 16:52:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614955420] [2024-06-21 16:52:35,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614955420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:35,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:35,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:52:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392041230] [2024-06-21 16:52:35,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:35,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:52:35,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:52:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:52:35,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:35,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 509 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:35,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:35,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:35,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:37,289 INFO L124 PetriNetUnfolderBase]: 9134/12988 cut-off events. [2024-06-21 16:52:37,289 INFO L125 PetriNetUnfolderBase]: For 51140/51144 co-relation queries the response was YES. [2024-06-21 16:52:37,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47870 conditions, 12988 events. 9134/12988 cut-off events. For 51140/51144 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73580 event pairs, 4645 based on Foata normal form. 7/12974 useless extension candidates. Maximal degree in co-relation 47843. Up to 12307 conditions per place. [2024-06-21 16:52:37,357 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 102 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-06-21 16:52:37,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 142 transitions, 1004 flow [2024-06-21 16:52:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:52:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:52:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:52:37,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-21 16:52:37,359 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 509 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:52:37,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 142 transitions, 1004 flow [2024-06-21 16:52:37,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 142 transitions, 930 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:52:37,382 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 667 flow [2024-06-21 16:52:37,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-21 16:52:37,383 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-21 16:52:37,383 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 667 flow [2024-06-21 16:52:37,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:37,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:37,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:37,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:52:37,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:37,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:37,385 INFO L85 PathProgramCache]: Analyzing trace with hash 312357262, now seen corresponding path program 2 times [2024-06-21 16:52:37,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:37,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382702270] [2024-06-21 16:52:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:37,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:38,412 INFO 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 16:52:38,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382702270] [2024-06-21 16:52:38,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382702270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:38,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:38,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:52:38,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134288957] [2024-06-21 16:52:38,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:38,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:52:38,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:52:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:52:38,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:38,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 667 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:38,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:38,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:38,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:40,184 INFO L124 PetriNetUnfolderBase]: 9156/13024 cut-off events. [2024-06-21 16:52:40,185 INFO L125 PetriNetUnfolderBase]: For 65400/65408 co-relation queries the response was YES. [2024-06-21 16:52:40,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51435 conditions, 13024 events. 9156/13024 cut-off events. For 65400/65408 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73728 event pairs, 4503 based on Foata normal form. 11/13012 useless extension candidates. Maximal degree in co-relation 51406. Up to 12314 conditions per place. [2024-06-21 16:52:40,271 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 102 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-21 16:52:40,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1115 flow [2024-06-21 16:52:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:52:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:52:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:52:40,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-21 16:52:40,273 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 667 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:52:40,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1115 flow [2024-06-21 16:52:40,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1051 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 16:52:40,303 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 744 flow [2024-06-21 16:52:40,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-21 16:52:40,304 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-21 16:52:40,304 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 744 flow [2024-06-21 16:52:40,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:40,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:40,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:40,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:52:40,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:40,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash 353008240, now seen corresponding path program 3 times [2024-06-21 16:52:40,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:40,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934282838] [2024-06-21 16:52:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:40,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934282838] [2024-06-21 16:52:41,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934282838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:41,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:41,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:52:41,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065236935] [2024-06-21 16:52:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:41,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:52:41,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:41,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:52:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:52:41,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:41,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:41,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:41,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:41,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:43,289 INFO L124 PetriNetUnfolderBase]: 9178/13065 cut-off events. [2024-06-21 16:52:43,289 INFO L125 PetriNetUnfolderBase]: For 82655/82669 co-relation queries the response was YES. [2024-06-21 16:52:43,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54813 conditions, 13065 events. 9178/13065 cut-off events. For 82655/82669 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 74045 event pairs, 4516 based on Foata normal form. 11/13051 useless extension candidates. Maximal degree in co-relation 54783. Up to 12258 conditions per place. [2024-06-21 16:52:43,375 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 92 selfloop transitions, 50 changer transitions 0/150 dead transitions. [2024-06-21 16:52:43,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 1304 flow [2024-06-21 16:52:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:52:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:52:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 16:52:43,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-21 16:52:43,376 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 744 flow. Second operand 7 states and 192 transitions. [2024-06-21 16:52:43,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 1304 flow [2024-06-21 16:52:43,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 150 transitions, 1179 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 16:52:43,424 INFO L231 Difference]: Finished difference. Result has 88 places, 114 transitions, 856 flow [2024-06-21 16:52:43,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=856, PETRI_PLACES=88, PETRI_TRANSITIONS=114} [2024-06-21 16:52:43,425 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-21 16:52:43,425 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 114 transitions, 856 flow [2024-06-21 16:52:43,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:43,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:43,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:43,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:52:43,426 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:43,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash 353008426, now seen corresponding path program 1 times [2024-06-21 16:52:43,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:43,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817189360] [2024-06-21 16:52:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:43,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:44,330 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 16:52:44,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:44,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817189360] [2024-06-21 16:52:44,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817189360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:44,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:44,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:52:44,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426991233] [2024-06-21 16:52:44,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:44,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:52:44,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:44,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:52:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:52:44,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:44,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 114 transitions, 856 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:44,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:44,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:44,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:45,987 INFO L124 PetriNetUnfolderBase]: 9334/13280 cut-off events. [2024-06-21 16:52:45,987 INFO L125 PetriNetUnfolderBase]: For 84703/84717 co-relation queries the response was YES. [2024-06-21 16:52:46,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55714 conditions, 13280 events. 9334/13280 cut-off events. For 84703/84717 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 75106 event pairs, 4186 based on Foata normal form. 16/13257 useless extension candidates. Maximal degree in co-relation 55683. Up to 12170 conditions per place. [2024-06-21 16:52:46,076 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 127 selfloop transitions, 43 changer transitions 0/178 dead transitions. [2024-06-21 16:52:46,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 178 transitions, 1626 flow [2024-06-21 16:52:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:52:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:52:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-21 16:52:46,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525606469002695 [2024-06-21 16:52:46,078 INFO L175 Difference]: Start difference. First operand has 88 places, 114 transitions, 856 flow. Second operand 7 states and 205 transitions. [2024-06-21 16:52:46,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 178 transitions, 1626 flow [2024-06-21 16:52:46,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 178 transitions, 1555 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 16:52:46,142 INFO L231 Difference]: Finished difference. Result has 94 places, 129 transitions, 1058 flow [2024-06-21 16:52:46,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1058, PETRI_PLACES=94, PETRI_TRANSITIONS=129} [2024-06-21 16:52:46,143 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-21 16:52:46,143 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 129 transitions, 1058 flow [2024-06-21 16:52:46,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:46,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:46,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:46,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:52:46,144 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:46,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash 85303078, now seen corresponding path program 2 times [2024-06-21 16:52:46,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:46,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057529066] [2024-06-21 16:52:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:46,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:47,098 INFO 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 16:52:47,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:47,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057529066] [2024-06-21 16:52:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057529066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:47,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:47,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:52:47,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139164033] [2024-06-21 16:52:47,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:52:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:52:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:52:47,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:47,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 129 transitions, 1058 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:47,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:47,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:47,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:49,021 INFO L124 PetriNetUnfolderBase]: 9444/13442 cut-off events. [2024-06-21 16:52:49,022 INFO L125 PetriNetUnfolderBase]: For 109677/109698 co-relation queries the response was YES. [2024-06-21 16:52:49,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62037 conditions, 13442 events. 9444/13442 cut-off events. For 109677/109698 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 75994 event pairs, 4143 based on Foata normal form. 21/13428 useless extension candidates. Maximal degree in co-relation 62002. Up to 12270 conditions per place. [2024-06-21 16:52:49,107 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 121 selfloop transitions, 59 changer transitions 0/188 dead transitions. [2024-06-21 16:52:49,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 188 transitions, 1869 flow [2024-06-21 16:52:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:52:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:52:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-21 16:52:49,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5417789757412399 [2024-06-21 16:52:49,109 INFO L175 Difference]: Start difference. First operand has 94 places, 129 transitions, 1058 flow. Second operand 7 states and 201 transitions. [2024-06-21 16:52:49,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 188 transitions, 1869 flow [2024-06-21 16:52:49,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 188 transitions, 1781 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 16:52:49,191 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1308 flow [2024-06-21 16:52:49,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-21 16:52:49,192 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-21 16:52:49,192 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1308 flow [2024-06-21 16:52:49,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:49,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:49,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:49,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:52:49,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:49,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash 530139946, now seen corresponding path program 3 times [2024-06-21 16:52:49,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:49,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634623910] [2024-06-21 16:52:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634623910] [2024-06-21 16:52:50,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634623910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:50,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:50,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:52:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473047836] [2024-06-21 16:52:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:50,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:52:50,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:52:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:52:50,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:50,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1308 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:50,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:50,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:50,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:51,926 INFO L124 PetriNetUnfolderBase]: 9431/13426 cut-off events. [2024-06-21 16:52:51,927 INFO L125 PetriNetUnfolderBase]: For 128426/128447 co-relation queries the response was YES. [2024-06-21 16:52:51,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64653 conditions, 13426 events. 9431/13426 cut-off events. For 128426/128447 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 76038 event pairs, 4157 based on Foata normal form. 21/13412 useless extension candidates. Maximal degree in co-relation 64615. Up to 12263 conditions per place. [2024-06-21 16:52:52,036 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 125 selfloop transitions, 54 changer transitions 0/187 dead transitions. [2024-06-21 16:52:52,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 187 transitions, 1934 flow [2024-06-21 16:52:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:52:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:52:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-21 16:52:52,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390835579514824 [2024-06-21 16:52:52,038 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1308 flow. Second operand 7 states and 200 transitions. [2024-06-21 16:52:52,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 187 transitions, 1934 flow [2024-06-21 16:52:52,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 187 transitions, 1864 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-21 16:52:52,170 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1359 flow [2024-06-21 16:52:52,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1359, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-21 16:52:52,171 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-21 16:52:52,171 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1359 flow [2024-06-21 16:52:52,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:52,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:52,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:52,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:52:52,172 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:52,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash 317118862, now seen corresponding path program 4 times [2024-06-21 16:52:52,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:52,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230252934] [2024-06-21 16:52:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:52,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:53,112 INFO 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 16:52:53,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:53,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230252934] [2024-06-21 16:52:53,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230252934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:53,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:53,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:52:53,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45841278] [2024-06-21 16:52:53,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:53,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:52:53,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:53,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:52:53,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:52:53,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:52:53,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1359 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:53,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:53,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:52:53,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:54,842 INFO L124 PetriNetUnfolderBase]: 9422/13432 cut-off events. [2024-06-21 16:52:54,843 INFO L125 PetriNetUnfolderBase]: For 134321/134323 co-relation queries the response was YES. [2024-06-21 16:52:54,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64851 conditions, 13432 events. 9422/13432 cut-off events. For 134321/134323 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 76386 event pairs, 4352 based on Foata normal form. 3/13393 useless extension candidates. Maximal degree in co-relation 64810. Up to 12585 conditions per place. [2024-06-21 16:52:54,971 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 116 selfloop transitions, 50 changer transitions 0/174 dead transitions. [2024-06-21 16:52:54,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 174 transitions, 1789 flow [2024-06-21 16:52:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:52:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:52:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:52:54,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-21 16:52:54,973 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1359 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:52:54,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 174 transitions, 1789 flow [2024-06-21 16:52:55,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 174 transitions, 1628 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 16:52:55,088 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1309 flow [2024-06-21 16:52:55,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-21 16:52:55,089 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-21 16:52:55,089 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1309 flow [2024-06-21 16:52:55,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 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 16:52:55,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:55,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:55,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:52:55,089 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:55,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:55,090 INFO L85 PathProgramCache]: Analyzing trace with hash 530386024, now seen corresponding path program 1 times [2024-06-21 16:52:55,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:55,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762404821] [2024-06-21 16:52:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:55,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:56,118 INFO 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 16:52:56,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:56,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762404821] [2024-06-21 16:52:56,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762404821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:56,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:56,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:52:56,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372348960] [2024-06-21 16:52:56,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:56,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:52:56,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:52:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:52:56,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:52:56,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1309 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:56,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:56,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:52:56,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:57,926 INFO L124 PetriNetUnfolderBase]: 8418/12450 cut-off events. [2024-06-21 16:52:57,926 INFO L125 PetriNetUnfolderBase]: For 128411/128413 co-relation queries the response was YES. [2024-06-21 16:52:57,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59347 conditions, 12450 events. 8418/12450 cut-off events. For 128411/128413 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 74555 event pairs, 3568 based on Foata normal form. 26/12439 useless extension candidates. Maximal degree in co-relation 59307. Up to 11139 conditions per place. [2024-06-21 16:52:58,000 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 155 selfloop transitions, 25 changer transitions 0/189 dead transitions. [2024-06-21 16:52:58,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1953 flow [2024-06-21 16:52:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:52:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:52:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-21 16:52:58,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-06-21 16:52:58,002 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1309 flow. Second operand 7 states and 203 transitions. [2024-06-21 16:52:58,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1953 flow [2024-06-21 16:52:58,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 189 transitions, 1819 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:52:58,105 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1292 flow [2024-06-21 16:52:58,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-21 16:52:58,105 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-21 16:52:58,105 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1292 flow [2024-06-21 16:52:58,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:58,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:58,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:58,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:52:58,106 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:52:58,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:58,106 INFO L85 PathProgramCache]: Analyzing trace with hash -164903164, now seen corresponding path program 1 times [2024-06-21 16:52:58,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:58,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754781111] [2024-06-21 16:52:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:58,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:58,775 INFO 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 16:52:58,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:58,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754781111] [2024-06-21 16:52:58,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754781111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:58,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:58,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:52:58,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389107993] [2024-06-21 16:52:58,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:58,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:52:58,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:58,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:52:58,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:52:58,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-21 16:52:58,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1292 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:58,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:58,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-21 16:52:58,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:00,117 INFO L124 PetriNetUnfolderBase]: 7960/11988 cut-off events. [2024-06-21 16:53:00,117 INFO L125 PetriNetUnfolderBase]: For 141320/141337 co-relation queries the response was YES. [2024-06-21 16:53:00,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59317 conditions, 11988 events. 7960/11988 cut-off events. For 141320/141337 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 73844 event pairs, 3697 based on Foata normal form. 19/11981 useless extension candidates. Maximal degree in co-relation 59276. Up to 10734 conditions per place. [2024-06-21 16:53:00,214 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 131 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2024-06-21 16:53:00,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1620 flow [2024-06-21 16:53:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:53:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:53:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-21 16:53:00,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169811320754717 [2024-06-21 16:53:00,215 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1292 flow. Second operand 5 states and 137 transitions. [2024-06-21 16:53:00,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1620 flow [2024-06-21 16:53:00,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1525 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:00,321 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1226 flow [2024-06-21 16:53:00,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1226, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-21 16:53:00,321 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-21 16:53:00,322 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1226 flow [2024-06-21 16:53:00,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:00,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:00,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:00,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:53:00,322 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:00,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1945364274, now seen corresponding path program 1 times [2024-06-21 16:53:00,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:00,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41517681] [2024-06-21 16:53:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:00,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:01,333 INFO 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 16:53:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41517681] [2024-06-21 16:53:01,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41517681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:01,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:01,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619582027] [2024-06-21 16:53:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:01,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:01,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1226 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:01,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:01,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:01,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:03,154 INFO L124 PetriNetUnfolderBase]: 9710/13837 cut-off events. [2024-06-21 16:53:03,154 INFO L125 PetriNetUnfolderBase]: For 179137/179145 co-relation queries the response was YES. [2024-06-21 16:53:03,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69830 conditions, 13837 events. 9710/13837 cut-off events. For 179137/179145 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 78963 event pairs, 4156 based on Foata normal form. 15/13817 useless extension candidates. Maximal degree in co-relation 69788. Up to 12842 conditions per place. [2024-06-21 16:53:03,263 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 160 selfloop transitions, 48 changer transitions 0/216 dead transitions. [2024-06-21 16:53:03,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2162 flow [2024-06-21 16:53:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-21 16:53:03,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-21 16:53:03,264 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1226 flow. Second operand 8 states and 230 transitions. [2024-06-21 16:53:03,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2162 flow [2024-06-21 16:53:03,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 216 transitions, 2133 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:53:03,365 INFO L231 Difference]: Finished difference. Result has 113 places, 160 transitions, 1521 flow [2024-06-21 16:53:03,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=113, PETRI_TRANSITIONS=160} [2024-06-21 16:53:03,366 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-21 16:53:03,366 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 160 transitions, 1521 flow [2024-06-21 16:53:03,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:03,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:03,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:03,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:53:03,367 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:03,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:03,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1941639624, now seen corresponding path program 2 times [2024-06-21 16:53:03,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:03,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373913414] [2024-06-21 16:53:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:03,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:04,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:04,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373913414] [2024-06-21 16:53:04,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373913414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:04,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:04,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:04,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871737836] [2024-06-21 16:53:04,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:04,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:04,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:04,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:04,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:04,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:04,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 160 transitions, 1521 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:04,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:04,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:04,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:06,597 INFO L124 PetriNetUnfolderBase]: 9943/14221 cut-off events. [2024-06-21 16:53:06,597 INFO L125 PetriNetUnfolderBase]: For 219819/219824 co-relation queries the response was YES. [2024-06-21 16:53:06,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77313 conditions, 14221 events. 9943/14221 cut-off events. For 219819/219824 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 81675 event pairs, 3981 based on Foata normal form. 7/14185 useless extension candidates. Maximal degree in co-relation 77269. Up to 12358 conditions per place. [2024-06-21 16:53:06,697 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 130 selfloop transitions, 98 changer transitions 0/236 dead transitions. [2024-06-21 16:53:06,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 236 transitions, 2755 flow [2024-06-21 16:53:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-21 16:53:06,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613207547169812 [2024-06-21 16:53:06,699 INFO L175 Difference]: Start difference. First operand has 113 places, 160 transitions, 1521 flow. Second operand 8 states and 238 transitions. [2024-06-21 16:53:06,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 236 transitions, 2755 flow [2024-06-21 16:53:06,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 236 transitions, 2612 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 16:53:06,831 INFO L231 Difference]: Finished difference. Result has 119 places, 179 transitions, 1924 flow [2024-06-21 16:53:06,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1924, PETRI_PLACES=119, PETRI_TRANSITIONS=179} [2024-06-21 16:53:06,832 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-21 16:53:06,832 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 179 transitions, 1924 flow [2024-06-21 16:53:06,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:06,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:06,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:06,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:53:06,833 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:06,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1941645204, now seen corresponding path program 3 times [2024-06-21 16:53:06,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:06,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065555392] [2024-06-21 16:53:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:06,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:07,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:07,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065555392] [2024-06-21 16:53:07,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065555392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:07,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:07,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:07,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340262600] [2024-06-21 16:53:07,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:07,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:07,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:07,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 179 transitions, 1924 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:07,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:07,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:07,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:09,973 INFO L124 PetriNetUnfolderBase]: 9930/14205 cut-off events. [2024-06-21 16:53:09,973 INFO L125 PetriNetUnfolderBase]: For 260631/260636 co-relation queries the response was YES. [2024-06-21 16:53:10,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82897 conditions, 14205 events. 9930/14205 cut-off events. For 260631/260636 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 81644 event pairs, 3995 based on Foata normal form. 7/14169 useless extension candidates. Maximal degree in co-relation 82850. Up to 12351 conditions per place. [2024-06-21 16:53:10,100 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 135 selfloop transitions, 92 changer transitions 0/235 dead transitions. [2024-06-21 16:53:10,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 235 transitions, 2882 flow [2024-06-21 16:53:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-21 16:53:10,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589622641509434 [2024-06-21 16:53:10,102 INFO L175 Difference]: Start difference. First operand has 119 places, 179 transitions, 1924 flow. Second operand 8 states and 237 transitions. [2024-06-21 16:53:10,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 235 transitions, 2882 flow [2024-06-21 16:53:10,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 235 transitions, 2728 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-21 16:53:10,355 INFO L231 Difference]: Finished difference. Result has 125 places, 179 transitions, 1969 flow [2024-06-21 16:53:10,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1969, PETRI_PLACES=125, PETRI_TRANSITIONS=179} [2024-06-21 16:53:10,355 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-21 16:53:10,356 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 179 transitions, 1969 flow [2024-06-21 16:53:10,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:10,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:10,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:10,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:53:10,356 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:10,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1657928050, now seen corresponding path program 4 times [2024-06-21 16:53:10,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:10,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454050734] [2024-06-21 16:53:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:10,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:11,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:11,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454050734] [2024-06-21 16:53:11,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454050734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:11,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:11,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:11,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926961643] [2024-06-21 16:53:11,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:11,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:11,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:11,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:11,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 179 transitions, 1969 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:11,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:11,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:11,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:13,643 INFO L124 PetriNetUnfolderBase]: 9994/14310 cut-off events. [2024-06-21 16:53:13,643 INFO L125 PetriNetUnfolderBase]: For 268666/268668 co-relation queries the response was YES. [2024-06-21 16:53:13,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82406 conditions, 14310 events. 9994/14310 cut-off events. For 268666/268668 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 82344 event pairs, 3979 based on Foata normal form. 7/14260 useless extension candidates. Maximal degree in co-relation 82357. Up to 12410 conditions per place. [2024-06-21 16:53:13,778 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 133 selfloop transitions, 97 changer transitions 0/238 dead transitions. [2024-06-21 16:53:13,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 238 transitions, 3033 flow [2024-06-21 16:53:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-21 16:53:13,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495283018867925 [2024-06-21 16:53:13,780 INFO L175 Difference]: Start difference. First operand has 125 places, 179 transitions, 1969 flow. Second operand 8 states and 233 transitions. [2024-06-21 16:53:13,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 238 transitions, 3033 flow [2024-06-21 16:53:13,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 238 transitions, 2784 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:53:13,967 INFO L231 Difference]: Finished difference. Result has 127 places, 185 transitions, 2048 flow [2024-06-21 16:53:13,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2048, PETRI_PLACES=127, PETRI_TRANSITIONS=185} [2024-06-21 16:53:13,968 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-21 16:53:13,968 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 185 transitions, 2048 flow [2024-06-21 16:53:13,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:13,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:13,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:13,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:53:13,968 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:13,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1797749094, now seen corresponding path program 5 times [2024-06-21 16:53:13,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:13,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618038083] [2024-06-21 16:53:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:13,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:14,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:14,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618038083] [2024-06-21 16:53:14,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618038083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:14,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270074801] [2024-06-21 16:53:14,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:14,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:15,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:15,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 185 transitions, 2048 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:15,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:15,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:15,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:17,081 INFO L124 PetriNetUnfolderBase]: 10058/14416 cut-off events. [2024-06-21 16:53:17,081 INFO L125 PetriNetUnfolderBase]: For 297495/297497 co-relation queries the response was YES. [2024-06-21 16:53:17,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85037 conditions, 14416 events. 10058/14416 cut-off events. For 297495/297497 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83033 event pairs, 3972 based on Foata normal form. 7/14366 useless extension candidates. Maximal degree in co-relation 84987. Up to 12469 conditions per place. [2024-06-21 16:53:17,202 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 131 selfloop transitions, 102 changer transitions 0/241 dead transitions. [2024-06-21 16:53:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 241 transitions, 3050 flow [2024-06-21 16:53:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-21 16:53:17,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-06-21 16:53:17,203 INFO L175 Difference]: Start difference. First operand has 127 places, 185 transitions, 2048 flow. Second operand 8 states and 232 transitions. [2024-06-21 16:53:17,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 241 transitions, 3050 flow [2024-06-21 16:53:17,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 241 transitions, 2693 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 16:53:17,410 INFO L231 Difference]: Finished difference. Result has 128 places, 190 transitions, 2005 flow [2024-06-21 16:53:17,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2005, PETRI_PLACES=128, PETRI_TRANSITIONS=190} [2024-06-21 16:53:17,410 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-21 16:53:17,411 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 190 transitions, 2005 flow [2024-06-21 16:53:17,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:17,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:17,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:17,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:53:17,411 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:17,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash -738178150, now seen corresponding path program 6 times [2024-06-21 16:53:17,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:17,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599003961] [2024-06-21 16:53:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:17,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:18,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599003961] [2024-06-21 16:53:18,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599003961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:18,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:18,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718945127] [2024-06-21 16:53:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:18,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:18,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:18,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 190 transitions, 2005 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:18,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:18,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:18,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:20,528 INFO L124 PetriNetUnfolderBase]: 10091/14474 cut-off events. [2024-06-21 16:53:20,528 INFO L125 PetriNetUnfolderBase]: For 320251/320253 co-relation queries the response was YES. [2024-06-21 16:53:20,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85993 conditions, 14474 events. 10091/14474 cut-off events. For 320251/320253 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83523 event pairs, 3937 based on Foata normal form. 7/14424 useless extension candidates. Maximal degree in co-relation 85943. Up to 12503 conditions per place. [2024-06-21 16:53:20,664 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 114 selfloop transitions, 120 changer transitions 0/242 dead transitions. [2024-06-21 16:53:20,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 242 transitions, 2855 flow [2024-06-21 16:53:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-21 16:53:20,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-21 16:53:20,668 INFO L175 Difference]: Start difference. First operand has 128 places, 190 transitions, 2005 flow. Second operand 8 states and 228 transitions. [2024-06-21 16:53:20,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 242 transitions, 2855 flow [2024-06-21 16:53:20,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 242 transitions, 2624 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:20,929 INFO L231 Difference]: Finished difference. Result has 131 places, 195 transitions, 2112 flow [2024-06-21 16:53:20,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2112, PETRI_PLACES=131, PETRI_TRANSITIONS=195} [2024-06-21 16:53:20,929 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-21 16:53:20,929 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 195 transitions, 2112 flow [2024-06-21 16:53:20,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:20,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:20,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:20,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:53:20,930 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:20,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:20,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1268895667, now seen corresponding path program 1 times [2024-06-21 16:53:20,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:20,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604457856] [2024-06-21 16:53:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:20,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:21,951 INFO 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 16:53:21,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604457856] [2024-06-21 16:53:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604457856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:21,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:21,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:21,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189165363] [2024-06-21 16:53:21,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:22,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:22,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 195 transitions, 2112 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:22,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:22,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:22,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:23,960 INFO L124 PetriNetUnfolderBase]: 10178/14583 cut-off events. [2024-06-21 16:53:23,960 INFO L125 PetriNetUnfolderBase]: For 349389/349397 co-relation queries the response was YES. [2024-06-21 16:53:24,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88749 conditions, 14583 events. 10178/14583 cut-off events. For 349389/349397 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84075 event pairs, 3275 based on Foata normal form. 14/14577 useless extension candidates. Maximal degree in co-relation 88698. Up to 13554 conditions per place. [2024-06-21 16:53:24,095 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 207 selfloop transitions, 43 changer transitions 0/258 dead transitions. [2024-06-21 16:53:24,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 258 transitions, 3070 flow [2024-06-21 16:53:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-21 16:53:24,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073375262054507 [2024-06-21 16:53:24,097 INFO L175 Difference]: Start difference. First operand has 131 places, 195 transitions, 2112 flow. Second operand 9 states and 242 transitions. [2024-06-21 16:53:24,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 258 transitions, 3070 flow [2024-06-21 16:53:24,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 258 transitions, 2846 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:24,359 INFO L231 Difference]: Finished difference. Result has 135 places, 201 transitions, 2142 flow [2024-06-21 16:53:24,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2142, PETRI_PLACES=135, PETRI_TRANSITIONS=201} [2024-06-21 16:53:24,360 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-21 16:53:24,360 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 201 transitions, 2142 flow [2024-06-21 16:53:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:24,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:24,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:24,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:53:24,360 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:24,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1688720449, now seen corresponding path program 2 times [2024-06-21 16:53:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:24,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736061923] [2024-06-21 16:53:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:24,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:25,409 INFO 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 16:53:25,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:25,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736061923] [2024-06-21 16:53:25,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736061923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:25,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:25,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275455931] [2024-06-21 16:53:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:25,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:25,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:25,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 201 transitions, 2142 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:25,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:25,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:25,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:27,496 INFO L124 PetriNetUnfolderBase]: 10163/14562 cut-off events. [2024-06-21 16:53:27,496 INFO L125 PetriNetUnfolderBase]: For 381563/381571 co-relation queries the response was YES. [2024-06-21 16:53:27,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89826 conditions, 14562 events. 10163/14562 cut-off events. For 381563/381571 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84015 event pairs, 3903 based on Foata normal form. 14/14556 useless extension candidates. Maximal degree in co-relation 89774. Up to 13640 conditions per place. [2024-06-21 16:53:27,620 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 202 selfloop transitions, 37 changer transitions 0/247 dead transitions. [2024-06-21 16:53:27,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 247 transitions, 2772 flow [2024-06-21 16:53:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 16:53:27,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-21 16:53:27,621 INFO L175 Difference]: Start difference. First operand has 135 places, 201 transitions, 2142 flow. Second operand 8 states and 213 transitions. [2024-06-21 16:53:27,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 247 transitions, 2772 flow [2024-06-21 16:53:27,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 247 transitions, 2591 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:27,958 INFO L231 Difference]: Finished difference. Result has 138 places, 201 transitions, 2046 flow [2024-06-21 16:53:27,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2046, PETRI_PLACES=138, PETRI_TRANSITIONS=201} [2024-06-21 16:53:27,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-21 16:53:27,958 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 201 transitions, 2046 flow [2024-06-21 16:53:27,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:27,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:27,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:27,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:53:27,959 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:27,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash -61462865, now seen corresponding path program 3 times [2024-06-21 16:53:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:27,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423571086] [2024-06-21 16:53:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:29,002 INFO 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 16:53:29,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:29,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423571086] [2024-06-21 16:53:29,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423571086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:29,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:29,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:29,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630757990] [2024-06-21 16:53:29,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:29,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:29,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:29,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:29,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:29,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 201 transitions, 2046 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:29,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:29,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:29,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:31,129 INFO L124 PetriNetUnfolderBase]: 10199/14613 cut-off events. [2024-06-21 16:53:31,129 INFO L125 PetriNetUnfolderBase]: For 405457/405468 co-relation queries the response was YES. [2024-06-21 16:53:31,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90842 conditions, 14613 events. 10199/14613 cut-off events. For 405457/405468 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84164 event pairs, 3916 based on Foata normal form. 12/14603 useless extension candidates. Maximal degree in co-relation 90788. Up to 13617 conditions per place. [2024-06-21 16:53:31,521 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 184 selfloop transitions, 53 changer transitions 0/245 dead transitions. [2024-06-21 16:53:31,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 245 transitions, 2730 flow [2024-06-21 16:53:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:53:31,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-21 16:53:31,522 INFO L175 Difference]: Start difference. First operand has 138 places, 201 transitions, 2046 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:53:31,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 245 transitions, 2730 flow [2024-06-21 16:53:31,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 245 transitions, 2646 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:53:31,816 INFO L231 Difference]: Finished difference. Result has 139 places, 204 transitions, 2166 flow [2024-06-21 16:53:31,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2166, PETRI_PLACES=139, PETRI_TRANSITIONS=204} [2024-06-21 16:53:31,817 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-21 16:53:31,817 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 204 transitions, 2166 flow [2024-06-21 16:53:31,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:31,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:31,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:31,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:53:31,817 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:31,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:31,818 INFO L85 PathProgramCache]: Analyzing trace with hash 863418835, now seen corresponding path program 1 times [2024-06-21 16:53:31,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:31,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315557788] [2024-06-21 16:53:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:32,789 INFO 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 16:53:32,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:32,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315557788] [2024-06-21 16:53:32,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315557788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:32,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:32,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:32,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404635889] [2024-06-21 16:53:32,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:32,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:32,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:32,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:32,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 204 transitions, 2166 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:32,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:32,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:32,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:35,034 INFO L124 PetriNetUnfolderBase]: 10396/14857 cut-off events. [2024-06-21 16:53:35,034 INFO L125 PetriNetUnfolderBase]: For 452920/452931 co-relation queries the response was YES. [2024-06-21 16:53:35,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94758 conditions, 14857 events. 10396/14857 cut-off events. For 452920/452931 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 85328 event pairs, 3802 based on Foata normal form. 34/14842 useless extension candidates. Maximal degree in co-relation 94703. Up to 13428 conditions per place. [2024-06-21 16:53:35,190 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 200 selfloop transitions, 57 changer transitions 0/265 dead transitions. [2024-06-21 16:53:35,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 265 transitions, 3228 flow [2024-06-21 16:53:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-21 16:53:35,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495283018867925 [2024-06-21 16:53:35,191 INFO L175 Difference]: Start difference. First operand has 139 places, 204 transitions, 2166 flow. Second operand 8 states and 233 transitions. [2024-06-21 16:53:35,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 265 transitions, 3228 flow [2024-06-21 16:53:35,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 265 transitions, 3050 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 16:53:35,525 INFO L231 Difference]: Finished difference. Result has 141 places, 207 transitions, 2193 flow [2024-06-21 16:53:35,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2193, PETRI_PLACES=141, PETRI_TRANSITIONS=207} [2024-06-21 16:53:35,526 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-21 16:53:35,526 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 207 transitions, 2193 flow [2024-06-21 16:53:35,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:35,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:35,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:35,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:53:35,527 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:35,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash 932737027, now seen corresponding path program 1 times [2024-06-21 16:53:35,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:35,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063268771] [2024-06-21 16:53:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:36,202 INFO 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 16:53:36,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:36,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063268771] [2024-06-21 16:53:36,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063268771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:36,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:36,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:53:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894741050] [2024-06-21 16:53:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:36,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:53:36,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:53:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:53:36,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:53:36,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 207 transitions, 2193 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:36,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:36,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:53:36,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:38,153 INFO L124 PetriNetUnfolderBase]: 9877/14372 cut-off events. [2024-06-21 16:53:38,153 INFO L125 PetriNetUnfolderBase]: For 475760/475803 co-relation queries the response was YES. [2024-06-21 16:53:38,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94579 conditions, 14372 events. 9877/14372 cut-off events. For 475760/475803 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85349 event pairs, 3822 based on Foata normal form. 31/14367 useless extension candidates. Maximal degree in co-relation 94523. Up to 13120 conditions per place. [2024-06-21 16:53:38,303 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 181 selfloop transitions, 41 changer transitions 0/242 dead transitions. [2024-06-21 16:53:38,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2918 flow [2024-06-21 16:53:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:53:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:53:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-21 16:53:38,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-21 16:53:38,304 INFO L175 Difference]: Start difference. First operand has 141 places, 207 transitions, 2193 flow. Second operand 6 states and 168 transitions. [2024-06-21 16:53:38,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2918 flow [2024-06-21 16:53:38,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 242 transitions, 2743 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:53:38,670 INFO L231 Difference]: Finished difference. Result has 141 places, 214 transitions, 2215 flow [2024-06-21 16:53:38,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2215, PETRI_PLACES=141, PETRI_TRANSITIONS=214} [2024-06-21 16:53:38,671 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-21 16:53:38,671 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 214 transitions, 2215 flow [2024-06-21 16:53:38,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:38,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:38,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:38,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:53:38,671 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:38,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash -191416755, now seen corresponding path program 4 times [2024-06-21 16:53:38,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:38,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399962372] [2024-06-21 16:53:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:39,617 INFO 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 16:53:39,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:39,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399962372] [2024-06-21 16:53:39,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399962372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:39,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:39,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:39,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283387971] [2024-06-21 16:53:39,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:39,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:39,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:39,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:39,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 214 transitions, 2215 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:39,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:39,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:39,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:41,942 INFO L124 PetriNetUnfolderBase]: 10445/14953 cut-off events. [2024-06-21 16:53:41,942 INFO L125 PetriNetUnfolderBase]: For 498972/498974 co-relation queries the response was YES. [2024-06-21 16:53:42,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97571 conditions, 14953 events. 10445/14953 cut-off events. For 498972/498974 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 86149 event pairs, 3924 based on Foata normal form. 6/14918 useless extension candidates. Maximal degree in co-relation 97514. Up to 13963 conditions per place. [2024-06-21 16:53:42,078 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 195 selfloop transitions, 53 changer transitions 0/256 dead transitions. [2024-06-21 16:53:42,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 256 transitions, 2925 flow [2024-06-21 16:53:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 16:53:42,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-21 16:53:42,079 INFO L175 Difference]: Start difference. First operand has 141 places, 214 transitions, 2215 flow. Second operand 8 states and 211 transitions. [2024-06-21 16:53:42,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 256 transitions, 2925 flow [2024-06-21 16:53:42,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 256 transitions, 2838 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 16:53:42,481 INFO L231 Difference]: Finished difference. Result has 146 places, 217 transitions, 2342 flow [2024-06-21 16:53:42,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2342, PETRI_PLACES=146, PETRI_TRANSITIONS=217} [2024-06-21 16:53:42,482 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-21 16:53:42,482 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 217 transitions, 2342 flow [2024-06-21 16:53:42,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:42,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:42,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:42,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:53:42,483 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:42,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1095584679, now seen corresponding path program 2 times [2024-06-21 16:53:42,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:42,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534144619] [2024-06-21 16:53:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:42,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:43,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:43,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534144619] [2024-06-21 16:53:43,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534144619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:43,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:43,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:43,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919208684] [2024-06-21 16:53:43,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:43,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:43,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:43,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 217 transitions, 2342 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:43,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:43,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:43,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:45,755 INFO L124 PetriNetUnfolderBase]: 10642/15222 cut-off events. [2024-06-21 16:53:45,755 INFO L125 PetriNetUnfolderBase]: For 552522/552543 co-relation queries the response was YES. [2024-06-21 16:53:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101538 conditions, 15222 events. 10642/15222 cut-off events. For 552522/552543 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 87705 event pairs, 3733 based on Foata normal form. 40/15216 useless extension candidates. Maximal degree in co-relation 101480. Up to 13751 conditions per place. [2024-06-21 16:53:45,917 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 201 selfloop transitions, 65 changer transitions 0/274 dead transitions. [2024-06-21 16:53:45,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 274 transitions, 3350 flow [2024-06-21 16:53:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-21 16:53:45,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535377358490566 [2024-06-21 16:53:45,918 INFO L175 Difference]: Start difference. First operand has 146 places, 217 transitions, 2342 flow. Second operand 8 states and 227 transitions. [2024-06-21 16:53:45,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 274 transitions, 3350 flow [2024-06-21 16:53:46,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 274 transitions, 3162 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 16:53:46,541 INFO L231 Difference]: Finished difference. Result has 148 places, 220 transitions, 2385 flow [2024-06-21 16:53:46,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2385, PETRI_PLACES=148, PETRI_TRANSITIONS=220} [2024-06-21 16:53:46,542 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-21 16:53:46,542 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 220 transitions, 2385 flow [2024-06-21 16:53:46,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:46,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:46,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:46,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:53:46,543 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:46,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1636579287, now seen corresponding path program 3 times [2024-06-21 16:53:46,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:46,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573271979] [2024-06-21 16:53:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:46,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:47,515 INFO 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 16:53:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:47,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573271979] [2024-06-21 16:53:47,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573271979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:47,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:47,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:47,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333736662] [2024-06-21 16:53:47,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:47,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:47,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:47,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:47,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:47,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 220 transitions, 2385 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:47,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:47,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:47,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:50,048 INFO L124 PetriNetUnfolderBase]: 10839/15505 cut-off events. [2024-06-21 16:53:50,048 INFO L125 PetriNetUnfolderBase]: For 597887/597908 co-relation queries the response was YES. [2024-06-21 16:53:50,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105930 conditions, 15505 events. 10839/15505 cut-off events. For 597887/597908 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89569 event pairs, 3769 based on Foata normal form. 40/15499 useless extension candidates. Maximal degree in co-relation 105871. Up to 14034 conditions per place. [2024-06-21 16:53:50,181 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 211 selfloop transitions, 60 changer transitions 0/279 dead transitions. [2024-06-21 16:53:50,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 279 transitions, 3533 flow [2024-06-21 16:53:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 16:53:50,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400943396226415 [2024-06-21 16:53:50,182 INFO L175 Difference]: Start difference. First operand has 148 places, 220 transitions, 2385 flow. Second operand 8 states and 229 transitions. [2024-06-21 16:53:50,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 279 transitions, 3533 flow [2024-06-21 16:53:50,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 279 transitions, 3370 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:50,677 INFO L231 Difference]: Finished difference. Result has 151 places, 223 transitions, 2449 flow [2024-06-21 16:53:50,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2449, PETRI_PLACES=151, PETRI_TRANSITIONS=223} [2024-06-21 16:53:50,677 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-21 16:53:50,677 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 223 transitions, 2449 flow [2024-06-21 16:53:50,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:50,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:50,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:50,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:53:50,678 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:50,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:50,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1400107257, now seen corresponding path program 4 times [2024-06-21 16:53:50,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:50,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468727397] [2024-06-21 16:53:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:50,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:51,805 INFO 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 16:53:51,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:51,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468727397] [2024-06-21 16:53:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468727397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:51,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:51,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:53:51,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746612829] [2024-06-21 16:53:51,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:51,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:53:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:53:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:53:51,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:53:51,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 223 transitions, 2449 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:51,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:51,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:53:51,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:54,032 INFO L124 PetriNetUnfolderBase]: 10985/15715 cut-off events. [2024-06-21 16:53:54,032 INFO L125 PetriNetUnfolderBase]: For 635762/635783 co-relation queries the response was YES. [2024-06-21 16:53:54,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108789 conditions, 15715 events. 10985/15715 cut-off events. For 635762/635783 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 90958 event pairs, 3508 based on Foata normal form. 40/15709 useless extension candidates. Maximal degree in co-relation 108729. Up to 13459 conditions per place. [2024-06-21 16:53:54,188 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 200 selfloop transitions, 76 changer transitions 0/284 dead transitions. [2024-06-21 16:53:54,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 284 transitions, 3525 flow [2024-06-21 16:53:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:53:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:53:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-21 16:53:54,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-21 16:53:54,189 INFO L175 Difference]: Start difference. First operand has 151 places, 223 transitions, 2449 flow. Second operand 8 states and 230 transitions. [2024-06-21 16:53:54,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 284 transitions, 3525 flow [2024-06-21 16:53:54,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 284 transitions, 3334 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 16:53:54,759 INFO L231 Difference]: Finished difference. Result has 153 places, 226 transitions, 2522 flow [2024-06-21 16:53:54,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2522, PETRI_PLACES=153, PETRI_TRANSITIONS=226} [2024-06-21 16:53:54,760 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-21 16:53:54,760 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 226 transitions, 2522 flow [2024-06-21 16:53:54,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:54,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:54,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:54,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:53:54,760 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:54,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash 441895651, now seen corresponding path program 2 times [2024-06-21 16:53:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:54,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223999563] [2024-06-21 16:53:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:55,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223999563] [2024-06-21 16:53:55,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223999563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:55,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:55,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:53:55,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183804239] [2024-06-21 16:53:55,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:55,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:53:55,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:55,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:53:55,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:53:55,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:53:55,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 226 transitions, 2522 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:55,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:55,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:53:55,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:58,442 INFO L124 PetriNetUnfolderBase]: 10281/14991 cut-off events. [2024-06-21 16:53:58,443 INFO L125 PetriNetUnfolderBase]: For 650991/651006 co-relation queries the response was YES. [2024-06-21 16:53:58,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105284 conditions, 14991 events. 10281/14991 cut-off events. For 650991/651006 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 89994 event pairs, 3956 based on Foata normal form. 15/14955 useless extension candidates. Maximal degree in co-relation 105223. Up to 13619 conditions per place. [2024-06-21 16:53:58,586 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 182 selfloop transitions, 41 changer transitions 0/246 dead transitions. [2024-06-21 16:53:58,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 246 transitions, 3028 flow [2024-06-21 16:53:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:53:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:53:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:53:58,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:53:58,587 INFO L175 Difference]: Start difference. First operand has 153 places, 226 transitions, 2522 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:53:58,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 246 transitions, 3028 flow [2024-06-21 16:53:59,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 246 transitions, 2770 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 16:53:59,039 INFO L231 Difference]: Finished difference. Result has 153 places, 226 transitions, 2358 flow [2024-06-21 16:53:59,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2358, PETRI_PLACES=153, PETRI_TRANSITIONS=226} [2024-06-21 16:53:59,040 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-21 16:53:59,040 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 226 transitions, 2358 flow [2024-06-21 16:53:59,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:59,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:59,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:53:59,041 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:53:59,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash -422686847, now seen corresponding path program 1 times [2024-06-21 16:53:59,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168719932] [2024-06-21 16:53:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:59,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:59,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:59,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168719932] [2024-06-21 16:53:59,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168719932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:59,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:59,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:53:59,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079418853] [2024-06-21 16:53:59,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:59,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:53:59,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:59,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:53:59,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:53:59,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:53:59,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 226 transitions, 2358 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:59,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:59,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:53:59,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:02,096 INFO L124 PetriNetUnfolderBase]: 9825/14481 cut-off events. [2024-06-21 16:54:02,096 INFO L125 PetriNetUnfolderBase]: For 585976/585978 co-relation queries the response was YES. [2024-06-21 16:54:02,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98215 conditions, 14481 events. 9825/14481 cut-off events. For 585976/585978 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 87432 event pairs, 3449 based on Foata normal form. 8/14435 useless extension candidates. Maximal degree in co-relation 98153. Up to 13276 conditions per place. [2024-06-21 16:54:02,213 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 222 selfloop transitions, 25 changer transitions 0/256 dead transitions. [2024-06-21 16:54:02,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 256 transitions, 3104 flow [2024-06-21 16:54:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:54:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:54:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 16:54:02,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-21 16:54:02,215 INFO L175 Difference]: Start difference. First operand has 153 places, 226 transitions, 2358 flow. Second operand 6 states and 167 transitions. [2024-06-21 16:54:02,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 256 transitions, 3104 flow [2024-06-21 16:54:02,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 256 transitions, 2987 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:54:02,594 INFO L231 Difference]: Finished difference. Result has 154 places, 230 transitions, 2356 flow [2024-06-21 16:54:02,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2356, PETRI_PLACES=154, PETRI_TRANSITIONS=230} [2024-06-21 16:54:02,594 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-21 16:54:02,594 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 230 transitions, 2356 flow [2024-06-21 16:54:02,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:02,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:02,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:02,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:54:02,595 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:02,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash -560411123, now seen corresponding path program 2 times [2024-06-21 16:54:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:02,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061391557] [2024-06-21 16:54:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:02,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:03,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:03,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061391557] [2024-06-21 16:54:03,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061391557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:03,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:03,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:54:03,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333473554] [2024-06-21 16:54:03,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:03,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:54:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:54:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:54:03,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 16:54:03,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 230 transitions, 2356 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:03,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:03,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 16:54:03,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:05,896 INFO L124 PetriNetUnfolderBase]: 9673/14215 cut-off events. [2024-06-21 16:54:05,897 INFO L125 PetriNetUnfolderBase]: For 604186/604191 co-relation queries the response was YES. [2024-06-21 16:54:05,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97840 conditions, 14215 events. 9673/14215 cut-off events. For 604186/604191 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 85083 event pairs, 3363 based on Foata normal form. 4/14168 useless extension candidates. Maximal degree in co-relation 97777. Up to 13060 conditions per place. [2024-06-21 16:54:06,018 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 216 selfloop transitions, 26 changer transitions 0/251 dead transitions. [2024-06-21 16:54:06,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 251 transitions, 2902 flow [2024-06-21 16:54:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:54:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:54:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 16:54:06,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-21 16:54:06,019 INFO L175 Difference]: Start difference. First operand has 154 places, 230 transitions, 2356 flow. Second operand 6 states and 163 transitions. [2024-06-21 16:54:06,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 251 transitions, 2902 flow [2024-06-21 16:54:06,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 251 transitions, 2851 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 16:54:06,440 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 2366 flow [2024-06-21 16:54:06,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2366, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-06-21 16:54:06,440 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-21 16:54:06,441 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 2366 flow [2024-06-21 16:54:06,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:06,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:06,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:06,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:54:06,441 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:06,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1272972305, now seen corresponding path program 1 times [2024-06-21 16:54:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074036894] [2024-06-21 16:54:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:07,639 INFO 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 16:54:07,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:07,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074036894] [2024-06-21 16:54:07,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074036894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:07,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:07,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:07,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900682946] [2024-06-21 16:54:07,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:07,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:07,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:54:07,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 2366 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:07,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:07,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:54:07,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:11,197 INFO L124 PetriNetUnfolderBase]: 12896/18583 cut-off events. [2024-06-21 16:54:11,197 INFO L125 PetriNetUnfolderBase]: For 934920/934928 co-relation queries the response was YES. [2024-06-21 16:54:11,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135333 conditions, 18583 events. 12896/18583 cut-off events. For 934920/934928 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 113325 event pairs, 3799 based on Foata normal form. 86/18610 useless extension candidates. Maximal degree in co-relation 135269. Up to 14311 conditions per place. [2024-06-21 16:54:11,380 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 259 selfloop transitions, 62 changer transitions 0/329 dead transitions. [2024-06-21 16:54:11,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 329 transitions, 4050 flow [2024-06-21 16:54:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:54:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:54:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 297 transitions. [2024-06-21 16:54:11,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560377358490566 [2024-06-21 16:54:11,381 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 2366 flow. Second operand 10 states and 297 transitions. [2024-06-21 16:54:11,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 329 transitions, 4050 flow [2024-06-21 16:54:11,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 329 transitions, 3966 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:54:11,985 INFO L231 Difference]: Finished difference. Result has 163 places, 236 transitions, 2651 flow [2024-06-21 16:54:11,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2651, PETRI_PLACES=163, PETRI_TRANSITIONS=236} [2024-06-21 16:54:11,986 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-21 16:54:11,986 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 236 transitions, 2651 flow [2024-06-21 16:54:11,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:11,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:11,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:11,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:54:11,987 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:11,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1271094635, now seen corresponding path program 2 times [2024-06-21 16:54:11,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:11,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119044107] [2024-06-21 16:54:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:13,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:13,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119044107] [2024-06-21 16:54:13,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119044107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:13,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:13,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:13,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510675046] [2024-06-21 16:54:13,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:13,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:13,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:13,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:13,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:54:13,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 236 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:13,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:13,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:54:13,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:16,895 INFO L124 PetriNetUnfolderBase]: 13456/19447 cut-off events. [2024-06-21 16:54:16,895 INFO L125 PetriNetUnfolderBase]: For 1043651/1043659 co-relation queries the response was YES. [2024-06-21 16:54:17,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145028 conditions, 19447 events. 13456/19447 cut-off events. For 1043651/1043659 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 120208 event pairs, 4832 based on Foata normal form. 100/19498 useless extension candidates. Maximal degree in co-relation 144961. Up to 17403 conditions per place. [2024-06-21 16:54:17,122 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 239 selfloop transitions, 57 changer transitions 0/304 dead transitions. [2024-06-21 16:54:17,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 304 transitions, 3692 flow [2024-06-21 16:54:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-06-21 16:54:17,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366876310272537 [2024-06-21 16:54:17,124 INFO L175 Difference]: Start difference. First operand has 163 places, 236 transitions, 2651 flow. Second operand 9 states and 256 transitions. [2024-06-21 16:54:17,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 304 transitions, 3692 flow [2024-06-21 16:54:18,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 304 transitions, 3548 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 16:54:18,072 INFO L231 Difference]: Finished difference. Result has 167 places, 238 transitions, 2729 flow [2024-06-21 16:54:18,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2729, PETRI_PLACES=167, PETRI_TRANSITIONS=238} [2024-06-21 16:54:18,073 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-21 16:54:18,073 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 238 transitions, 2729 flow [2024-06-21 16:54:18,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:18,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:18,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:18,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:54:18,074 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:18,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1677642423, now seen corresponding path program 3 times [2024-06-21 16:54:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:18,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087693601] [2024-06-21 16:54:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:18,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:19,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087693601] [2024-06-21 16:54:19,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087693601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:19,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:19,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:19,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002839991] [2024-06-21 16:54:19,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:19,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:19,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:54:19,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 238 transitions, 2729 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:19,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:19,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:54:19,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:23,041 INFO L124 PetriNetUnfolderBase]: 13830/20083 cut-off events. [2024-06-21 16:54:23,042 INFO L125 PetriNetUnfolderBase]: For 1076583/1076591 co-relation queries the response was YES. [2024-06-21 16:54:23,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147764 conditions, 20083 events. 13830/20083 cut-off events. For 1076583/1076591 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 126120 event pairs, 4851 based on Foata normal form. 86/20120 useless extension candidates. Maximal degree in co-relation 147695. Up to 16240 conditions per place. [2024-06-21 16:54:23,294 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 250 selfloop transitions, 58 changer transitions 0/316 dead transitions. [2024-06-21 16:54:23,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 316 transitions, 4045 flow [2024-06-21 16:54:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-06-21 16:54:23,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549266247379455 [2024-06-21 16:54:23,303 INFO L175 Difference]: Start difference. First operand has 167 places, 238 transitions, 2729 flow. Second operand 9 states and 262 transitions. [2024-06-21 16:54:23,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 316 transitions, 4045 flow [2024-06-21 16:54:24,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 316 transitions, 3868 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 16:54:24,349 INFO L231 Difference]: Finished difference. Result has 170 places, 242 transitions, 2862 flow [2024-06-21 16:54:24,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2862, PETRI_PLACES=170, PETRI_TRANSITIONS=242} [2024-06-21 16:54:24,350 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2024-06-21 16:54:24,350 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 242 transitions, 2862 flow [2024-06-21 16:54:24,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:24,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:24,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:24,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:54:24,350 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:54:24,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:24,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1905343851, now seen corresponding path program 4 times [2024-06-21 16:54:24,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:24,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303948109] [2024-06-21 16:54:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:24,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:25,522 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 16:54:25,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:25,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303948109] [2024-06-21 16:54:25,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303948109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:25,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:25,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:25,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410331480] [2024-06-21 16:54:25,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:25,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:25,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:25,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:25,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:25,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 16:54:25,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 242 transitions, 2862 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:25,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:25,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 16:54:25,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand