./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix013.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/mix013.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix013.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix013.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-7724a2d-m [2024-06-27 20:00:16,817 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:00:16,876 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:00:16,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:00:16,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:00:16,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:00:16,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:00:16,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:00:16,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:00:16,913 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:00:16,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:00:16,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:00:16,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:00:16,915 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:00:16,916 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:00:16,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:00:16,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:00:16,916 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:00:16,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:00:16,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:00:16,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:00:16,917 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:00:16,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:00:16,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:00:16,918 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:00:16,918 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:00:16,918 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:00:16,919 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:00:16,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:00:16,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:00:16,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:00:16,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:00:16,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:00:16,921 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:00:16,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:00:16,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:00:16,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:00:16,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:00:16,922 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:00:16,922 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:00:16,922 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:00:16,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:00:16,923 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:00:16,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:00:17,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:00:17,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:00:17,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:00:17,174 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:00:17,175 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:00:17,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix013.opt.i [2024-06-27 20:00:18,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:00:18,385 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:00:18,386 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix013.opt.i [2024-06-27 20:00:18,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f5d79a2b/12e9183581bc4bfb98275447a51f40c6/FLAG8dcc43892 [2024-06-27 20:00:18,418 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f5d79a2b/12e9183581bc4bfb98275447a51f40c6 [2024-06-27 20:00:18,420 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:00:18,420 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:00:18,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix013.opt.yml/witness.yml [2024-06-27 20:00:18,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:00:18,584 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:00:18,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:00:18,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:00:18,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:00:18,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:00:18" (1/2) ... [2024-06-27 20:00:18,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc23405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:00:18, skipping insertion in model container [2024-06-27 20:00:18,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:00:18" (1/2) ... [2024-06-27 20:00:18,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@315618c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:00:18, skipping insertion in model container [2024-06-27 20:00:18,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:00:18" (2/2) ... [2024-06-27 20:00:18,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc23405 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:18, skipping insertion in model container [2024-06-27 20:00:18,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:00:18" (2/2) ... [2024-06-27 20:00:18,592 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:00:18,701 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:00:18,702 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-27 20:00:18,702 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-27 20:00:18,702 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-27 20:00:18,702 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-27 20:00:18,702 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:00:18,702 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-27 20:00:18,736 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:00:19,038 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:00:19,054 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:00:19,182 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:00:19,224 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:00:19,225 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19 WrapperNode [2024-06-27 20:00:19,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:00:19,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:00:19,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:00:19,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:00:19,232 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 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,256 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 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,295 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 163 [2024-06-27 20:00:19,297 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:00:19,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:00:19,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:00:19,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:00:19,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,308 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,330 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]. [2024-06-27 20:00:19,330 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,330 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:00:19,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:00:19,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:00:19,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:00:19,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (1/1) ... [2024-06-27 20:00:19,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:00:19,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:00:19,379 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) [2024-06-27 20:00:19,381 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 [2024-06-27 20:00:19,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:00:19,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:00:19,407 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:00:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:00:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:00:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:00:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:00:19,409 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:00:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:00:19,409 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:00:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:00:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:00:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:00:19,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:00:19,410 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:00:19,520 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:00:19,522 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:00:19,841 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:00:19,841 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:00:19,939 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:00:19,940 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:00:19,940 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:00:19 BoogieIcfgContainer [2024-06-27 20:00:19,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:00:19,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:00:19,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:00:19,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:00:19,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:00:18" (1/4) ... [2024-06-27 20:00:19,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f5942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:00:19, skipping insertion in model container [2024-06-27 20:00:19,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:00:18" (2/4) ... [2024-06-27 20:00:19,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f5942f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:00:19, skipping insertion in model container [2024-06-27 20:00:19,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:00:19" (3/4) ... [2024-06-27 20:00:19,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f5942f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:00:19, skipping insertion in model container [2024-06-27 20:00:19,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:00:19" (4/4) ... [2024-06-27 20:00:19,947 INFO L112 eAbstractionObserver]: Analyzing ICFG mix013.opt.i [2024-06-27 20:00:19,961 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:00:19,961 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:00:19,961 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:00:20,012 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:00:20,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:00:20,071 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-27 20:00:20,071 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:00:20,074 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 5. Compared 95 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. [2024-06-27 20:00:20,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:00:20,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-27 20:00:20,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:00:20,095 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;@63224faf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:00:20,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:00:20,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:00:20,099 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:00:20,100 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:00:20,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:20,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:00:20,101 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)] === [2024-06-27 20:00:20,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash 417565585, now seen corresponding path program 1 times [2024-06-27 20:00:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:20,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247429445] [2024-06-27 20:00:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:20,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:21,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247429445] [2024-06-27 20:00:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247429445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:21,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:21,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:00:21,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24863921] [2024-06-27 20:00:21,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:21,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:00:21,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:00:21,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:00:21,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-06-27 20:00:21,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:21,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:21,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-06-27 20:00:21,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:22,293 INFO L124 PetriNetUnfolderBase]: 4867/6991 cut-off events. [2024-06-27 20:00:22,293 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-27 20:00:22,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13903 conditions, 6991 events. 4867/6991 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 40447 event pairs, 3534 based on Foata normal form. 1/6720 useless extension candidates. Maximal degree in co-relation 13890. Up to 6693 conditions per place. [2024-06-27 20:00:22,334 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 40 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 20:00:22,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 225 flow [2024-06-27 20:00:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:00:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:00:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-27 20:00:22,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 20:00:22,345 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 106 transitions. [2024-06-27 20:00:22,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 225 flow [2024-06-27 20:00:22,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:22,350 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-27 20:00:22,352 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} [2024-06-27 20:00:22,354 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-27 20:00:22,354 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-27 20:00:22,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:22,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:22,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:22,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:00:22,356 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)] === [2024-06-27 20:00:22,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1848626800, now seen corresponding path program 1 times [2024-06-27 20:00:22,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:22,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069984092] [2024-06-27 20:00:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:22,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:22,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069984092] [2024-06-27 20:00:22,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069984092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:22,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:22,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:00:22,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829181811] [2024-06-27 20:00:22,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:22,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:00:22,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:22,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:00:22,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:00:23,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-27 20:00:23,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:23,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:23,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-27 20:00:23,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:23,831 INFO L124 PetriNetUnfolderBase]: 5569/7831 cut-off events. [2024-06-27 20:00:23,832 INFO L125 PetriNetUnfolderBase]: For 1726/1726 co-relation queries the response was YES. [2024-06-27 20:00:23,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18018 conditions, 7831 events. 5569/7831 cut-off events. For 1726/1726 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 44353 event pairs, 3437 based on Foata normal form. 4/7763 useless extension candidates. Maximal degree in co-relation 18006. Up to 7610 conditions per place. [2024-06-27 20:00:23,882 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 51 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 20:00:23,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 319 flow [2024-06-27 20:00:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:00:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:00:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-27 20:00:23,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-27 20:00:23,886 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 136 transitions. [2024-06-27 20:00:23,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 319 flow [2024-06-27 20:00:23,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:00:23,889 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-27 20:00:23,889 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} [2024-06-27 20:00:23,889 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-27 20:00:23,890 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-27 20:00:23,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:23,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:23,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:23,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:00:23,890 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)] === [2024-06-27 20:00:23,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1922771931, now seen corresponding path program 1 times [2024-06-27 20:00:23,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:23,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995527074] [2024-06-27 20:00:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:23,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:24,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:24,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995527074] [2024-06-27 20:00:24,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995527074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:24,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:24,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:00:24,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165381109] [2024-06-27 20:00:24,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:24,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:00:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:24,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:00:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:00:24,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-27 20:00:24,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:24,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:24,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-27 20:00:24,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:25,830 INFO L124 PetriNetUnfolderBase]: 7070/9868 cut-off events. [2024-06-27 20:00:25,830 INFO L125 PetriNetUnfolderBase]: For 5896/5896 co-relation queries the response was YES. [2024-06-27 20:00:25,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25302 conditions, 9868 events. 7070/9868 cut-off events. For 5896/5896 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55639 event pairs, 3323 based on Foata normal form. 8/9784 useless extension candidates. Maximal degree in co-relation 25288. Up to 9556 conditions per place. [2024-06-27 20:00:25,890 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-27 20:00:25,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 484 flow [2024-06-27 20:00:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:00:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:00:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 20:00:25,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60062893081761 [2024-06-27 20:00:25,894 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 191 transitions. [2024-06-27 20:00:25,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 484 flow [2024-06-27 20:00:25,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 456 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 20:00:25,899 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-27 20:00:25,899 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} [2024-06-27 20:00:25,900 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-27 20:00:25,900 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-27 20:00:25,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:25,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:25,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:00:25,901 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)] === [2024-06-27 20:00:25,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1107183122, now seen corresponding path program 1 times [2024-06-27 20:00:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010494318] [2024-06-27 20:00:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:25,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:26,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:26,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010494318] [2024-06-27 20:00:26,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010494318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:26,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:26,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:00:26,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47591134] [2024-06-27 20:00:26,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:26,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:00:26,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:26,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:00:26,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:00:26,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:00:26,751 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) [2024-06-27 20:00:26,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:26,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:00:26,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:27,925 INFO L124 PetriNetUnfolderBase]: 7847/11095 cut-off events. [2024-06-27 20:00:27,925 INFO L125 PetriNetUnfolderBase]: For 11423/11423 co-relation queries the response was YES. [2024-06-27 20:00:27,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30895 conditions, 11095 events. 7847/11095 cut-off events. For 11423/11423 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 63187 event pairs, 4266 based on Foata normal form. 3/10886 useless extension candidates. Maximal degree in co-relation 30878. Up to 10669 conditions per place. [2024-06-27 20:00:27,998 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-27 20:00:27,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 447 flow [2024-06-27 20:00:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:00:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:00:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-27 20:00:27,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-27 20:00:28,000 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 136 transitions. [2024-06-27 20:00:28,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 447 flow [2024-06-27 20:00:28,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:28,003 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-27 20:00:28,004 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} [2024-06-27 20:00:28,004 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-27 20:00:28,004 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-27 20:00:28,005 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) [2024-06-27 20:00:28,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:28,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:28,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:00:28,005 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)] === [2024-06-27 20:00:28,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash -12035502, now seen corresponding path program 1 times [2024-06-27 20:00:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:28,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924355428] [2024-06-27 20:00:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:28,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:28,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:28,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924355428] [2024-06-27 20:00:28,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924355428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:28,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:28,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:00:28,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750670301] [2024-06-27 20:00:28,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:28,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:00:28,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:00:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:00:28,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:00:28,941 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) [2024-06-27 20:00:28,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:28,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:00:28,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:30,153 INFO L124 PetriNetUnfolderBase]: 7838/11126 cut-off events. [2024-06-27 20:00:30,154 INFO L125 PetriNetUnfolderBase]: For 17344/17344 co-relation queries the response was YES. [2024-06-27 20:00:30,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33666 conditions, 11126 events. 7838/11126 cut-off events. For 17344/17344 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 63587 event pairs, 4142 based on Foata normal form. 3/10958 useless extension candidates. Maximal degree in co-relation 33647. Up to 10642 conditions per place. [2024-06-27 20:00:30,221 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 66 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-27 20:00:30,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 89 transitions, 516 flow [2024-06-27 20:00:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:00:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:00:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 20:00:30,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-27 20:00:30,223 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 162 transitions. [2024-06-27 20:00:30,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 89 transitions, 516 flow [2024-06-27 20:00:30,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 487 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:30,227 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 312 flow [2024-06-27 20:00:30,227 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 20:00:30,228 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-27 20:00:30,228 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 312 flow [2024-06-27 20:00:30,228 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) [2024-06-27 20:00:30,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:30,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:30,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:00:30,229 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)] === [2024-06-27 20:00:30,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1990766671, now seen corresponding path program 1 times [2024-06-27 20:00:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435399398] [2024-06-27 20:00:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:30,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435399398] [2024-06-27 20:00:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435399398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:30,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:30,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:00:30,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592906785] [2024-06-27 20:00:30,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:30,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:00:30,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:30,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:00:30,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:00:31,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:31,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 312 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) [2024-06-27 20:00:31,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:31,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:31,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:32,657 INFO L124 PetriNetUnfolderBase]: 9010/12482 cut-off events. [2024-06-27 20:00:32,657 INFO L125 PetriNetUnfolderBase]: For 30157/30191 co-relation queries the response was YES. [2024-06-27 20:00:32,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41238 conditions, 12482 events. 9010/12482 cut-off events. For 30157/30191 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69213 event pairs, 4687 based on Foata normal form. 11/12470 useless extension candidates. Maximal degree in co-relation 41218. Up to 12158 conditions per place. [2024-06-27 20:00:32,714 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 74 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-06-27 20:00:32,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 672 flow [2024-06-27 20:00:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:00:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:00:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 20:00:32,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-27 20:00:32,716 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 312 flow. Second operand 6 states and 165 transitions. [2024-06-27 20:00:32,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 672 flow [2024-06-27 20:00:32,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 629 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:32,721 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 394 flow [2024-06-27 20:00:32,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=394, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-27 20:00:32,721 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-27 20:00:32,722 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 394 flow [2024-06-27 20:00:32,722 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) [2024-06-27 20:00:32,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:32,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:32,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:00:32,722 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)] === [2024-06-27 20:00:32,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:32,723 INFO L85 PathProgramCache]: Analyzing trace with hash -346554393, now seen corresponding path program 2 times [2024-06-27 20:00:32,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:32,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251514594] [2024-06-27 20:00:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:32,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:33,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:33,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251514594] [2024-06-27 20:00:33,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251514594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:33,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:33,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:00:33,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108552740] [2024-06-27 20:00:33,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:33,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:00:33,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:00:33,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:00:33,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:33,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 394 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) [2024-06-27 20:00:33,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:33,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:33,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:34,888 INFO L124 PetriNetUnfolderBase]: 9001/12471 cut-off events. [2024-06-27 20:00:34,889 INFO L125 PetriNetUnfolderBase]: For 41318/41349 co-relation queries the response was YES. [2024-06-27 20:00:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44375 conditions, 12471 events. 9001/12471 cut-off events. For 41318/41349 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69097 event pairs, 4690 based on Foata normal form. 9/12457 useless extension candidates. Maximal degree in co-relation 44354. Up to 12149 conditions per place. [2024-06-27 20:00:34,952 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 68 selfloop transitions, 21 changer transitions 0/97 dead transitions. [2024-06-27 20:00:34,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 634 flow [2024-06-27 20:00:34,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:00:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:00:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 20:00:34,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:00:34,954 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 394 flow. Second operand 6 states and 159 transitions. [2024-06-27 20:00:34,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 634 flow [2024-06-27 20:00:34,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 580 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 20:00:34,967 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 393 flow [2024-06-27 20:00:34,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-27 20:00:34,968 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-27 20:00:34,968 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 393 flow [2024-06-27 20:00:34,968 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) [2024-06-27 20:00:34,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:34,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:34,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:00:34,969 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)] === [2024-06-27 20:00:34,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1373894081, now seen corresponding path program 1 times [2024-06-27 20:00:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:34,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202419680] [2024-06-27 20:00:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:34,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202419680] [2024-06-27 20:00:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202419680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:35,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:35,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:35,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911598563] [2024-06-27 20:00:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:35,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:35,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 393 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) [2024-06-27 20:00:35,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:35,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:35,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:37,347 INFO L124 PetriNetUnfolderBase]: 9092/12609 cut-off events. [2024-06-27 20:00:37,347 INFO L125 PetriNetUnfolderBase]: For 46793/46821 co-relation queries the response was YES. [2024-06-27 20:00:37,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45315 conditions, 12609 events. 9092/12609 cut-off events. For 46793/46821 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69669 event pairs, 4680 based on Foata normal form. 7/12594 useless extension candidates. Maximal degree in co-relation 45292. Up to 12251 conditions per place. [2024-06-27 20:00:37,412 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 92 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-27 20:00:37,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 866 flow [2024-06-27 20:00:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 20:00:37,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-27 20:00:37,416 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 393 flow. Second operand 8 states and 214 transitions. [2024-06-27 20:00:37,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 866 flow [2024-06-27 20:00:37,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 792 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:37,432 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 549 flow [2024-06-27 20:00:37,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=549, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2024-06-27 20:00:37,434 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-27 20:00:37,435 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 549 flow [2024-06-27 20:00:37,435 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) [2024-06-27 20:00:37,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:37,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:37,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:00:37,436 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)] === [2024-06-27 20:00:37,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1261492267, now seen corresponding path program 2 times [2024-06-27 20:00:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:37,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683874114] [2024-06-27 20:00:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:37,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683874114] [2024-06-27 20:00:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683874114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:38,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:38,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:38,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696665025] [2024-06-27 20:00:38,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:38,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:38,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:38,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:38,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 549 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) [2024-06-27 20:00:38,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:38,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:38,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:39,904 INFO L124 PetriNetUnfolderBase]: 9114/12642 cut-off events. [2024-06-27 20:00:39,905 INFO L125 PetriNetUnfolderBase]: For 60568/60600 co-relation queries the response was YES. [2024-06-27 20:00:39,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48899 conditions, 12642 events. 9114/12642 cut-off events. For 60568/60600 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69792 event pairs, 4526 based on Foata normal form. 11/12630 useless extension candidates. Maximal degree in co-relation 48874. Up to 12258 conditions per place. [2024-06-27 20:00:39,983 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 92 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2024-06-27 20:00:39,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 134 transitions, 975 flow [2024-06-27 20:00:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 20:00:39,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-27 20:00:39,985 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 549 flow. Second operand 7 states and 188 transitions. [2024-06-27 20:00:39,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 134 transitions, 975 flow [2024-06-27 20:00:40,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 134 transitions, 913 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:40,004 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 626 flow [2024-06-27 20:00:40,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=626, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-27 20:00:40,005 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-27 20:00:40,005 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 626 flow [2024-06-27 20:00:40,005 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) [2024-06-27 20:00:40,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:40,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:40,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:00:40,006 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)] === [2024-06-27 20:00:40,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:40,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1432190047, now seen corresponding path program 3 times [2024-06-27 20:00:40,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:40,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763701050] [2024-06-27 20:00:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:40,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:40,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:40,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763701050] [2024-06-27 20:00:40,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763701050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:40,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:40,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449338711] [2024-06-27 20:00:40,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:41,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:41,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 626 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) [2024-06-27 20:00:41,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:41,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:41,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:42,643 INFO L124 PetriNetUnfolderBase]: 9136/12687 cut-off events. [2024-06-27 20:00:42,643 INFO L125 PetriNetUnfolderBase]: For 77393/77421 co-relation queries the response was YES. [2024-06-27 20:00:42,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52313 conditions, 12687 events. 9136/12687 cut-off events. For 77393/77421 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 70228 event pairs, 4539 based on Foata normal form. 11/12678 useless extension candidates. Maximal degree in co-relation 52287. Up to 12202 conditions per place. [2024-06-27 20:00:42,725 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 50 changer transitions 0/140 dead transitions. [2024-06-27 20:00:42,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 140 transitions, 1162 flow [2024-06-27 20:00:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 20:00:42,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-27 20:00:42,726 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 626 flow. Second operand 7 states and 192 transitions. [2024-06-27 20:00:42,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 140 transitions, 1162 flow [2024-06-27 20:00:42,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 140 transitions, 1039 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:00:42,756 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 736 flow [2024-06-27 20:00:42,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2024-06-27 20:00:42,756 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-27 20:00:42,757 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 736 flow [2024-06-27 20:00:42,757 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) [2024-06-27 20:00:42,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:42,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:42,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:00:42,757 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)] === [2024-06-27 20:00:42,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1432189861, now seen corresponding path program 1 times [2024-06-27 20:00:42,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:42,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882717017] [2024-06-27 20:00:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:42,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:43,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882717017] [2024-06-27 20:00:43,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882717017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:43,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:43,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:43,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339045231] [2024-06-27 20:00:43,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:43,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:43,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:43,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 736 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) [2024-06-27 20:00:43,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:43,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:43,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:45,112 INFO L124 PetriNetUnfolderBase]: 9158/12771 cut-off events. [2024-06-27 20:00:45,112 INFO L125 PetriNetUnfolderBase]: For 79161/79187 co-relation queries the response was YES. [2024-06-27 20:00:45,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52520 conditions, 12771 events. 9158/12771 cut-off events. For 79161/79187 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 71565 event pairs, 4398 based on Foata normal form. 17/12767 useless extension candidates. Maximal degree in co-relation 52493. Up to 12293 conditions per place. [2024-06-27 20:00:45,198 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 108 selfloop transitions, 35 changer transitions 0/151 dead transitions. [2024-06-27 20:00:45,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 151 transitions, 1292 flow [2024-06-27 20:00:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 20:00:45,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-27 20:00:45,199 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 736 flow. Second operand 7 states and 192 transitions. [2024-06-27 20:00:45,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 151 transitions, 1292 flow [2024-06-27 20:00:45,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 151 transitions, 1227 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:45,230 INFO L231 Difference]: Finished difference. Result has 87 places, 112 transitions, 848 flow [2024-06-27 20:00:45,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=848, PETRI_PLACES=87, PETRI_TRANSITIONS=112} [2024-06-27 20:00:45,230 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-27 20:00:45,230 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 112 transitions, 848 flow [2024-06-27 20:00:45,231 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) [2024-06-27 20:00:45,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:45,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:45,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:00:45,231 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)] === [2024-06-27 20:00:45,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2122292439, now seen corresponding path program 2 times [2024-06-27 20:00:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:45,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254039645] [2024-06-27 20:00:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254039645] [2024-06-27 20:00:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254039645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:46,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085355338] [2024-06-27 20:00:46,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:46,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:46,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:46,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:46,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:46,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:46,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 112 transitions, 848 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) [2024-06-27 20:00:46,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:46,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:46,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:47,726 INFO L124 PetriNetUnfolderBase]: 9180/12796 cut-off events. [2024-06-27 20:00:47,726 INFO L125 PetriNetUnfolderBase]: For 97445/97494 co-relation queries the response was YES. [2024-06-27 20:00:47,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55907 conditions, 12796 events. 9180/12796 cut-off events. For 97445/97494 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 71461 event pairs, 4391 based on Foata normal form. 33/12807 useless extension candidates. Maximal degree in co-relation 55878. Up to 12316 conditions per place. [2024-06-27 20:00:47,794 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 105 selfloop transitions, 40 changer transitions 0/153 dead transitions. [2024-06-27 20:00:47,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 153 transitions, 1372 flow [2024-06-27 20:00:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 20:00:47,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-27 20:00:47,795 INFO L175 Difference]: Start difference. First operand has 87 places, 112 transitions, 848 flow. Second operand 7 states and 188 transitions. [2024-06-27 20:00:47,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 153 transitions, 1372 flow [2024-06-27 20:00:47,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 153 transitions, 1317 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:47,831 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 936 flow [2024-06-27 20:00:47,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=936, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2024-06-27 20:00:47,832 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-27 20:00:47,832 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 936 flow [2024-06-27 20:00:47,832 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) [2024-06-27 20:00:47,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:47,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:47,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:00:47,833 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)] === [2024-06-27 20:00:47,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:47,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1255058341, now seen corresponding path program 3 times [2024-06-27 20:00:47,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:47,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369403064] [2024-06-27 20:00:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:47,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:48,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369403064] [2024-06-27 20:00:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369403064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:48,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:48,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284065116] [2024-06-27 20:00:48,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:48,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:48,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:48,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:48,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 936 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) [2024-06-27 20:00:48,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:48,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:48,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:50,237 INFO L124 PetriNetUnfolderBase]: 9171/12784 cut-off events. [2024-06-27 20:00:50,237 INFO L125 PetriNetUnfolderBase]: For 108140/108199 co-relation queries the response was YES. [2024-06-27 20:00:50,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56967 conditions, 12784 events. 9171/12784 cut-off events. For 108140/108199 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 71341 event pairs, 4391 based on Foata normal form. 49/12814 useless extension candidates. Maximal degree in co-relation 56936. Up to 12307 conditions per place. [2024-06-27 20:00:50,327 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 103 selfloop transitions, 39 changer transitions 0/150 dead transitions. [2024-06-27 20:00:50,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 150 transitions, 1336 flow [2024-06-27 20:00:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 20:00:50,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-27 20:00:50,328 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 936 flow. Second operand 7 states and 186 transitions. [2024-06-27 20:00:50,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 150 transitions, 1336 flow [2024-06-27 20:00:50,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1204 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:50,392 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 893 flow [2024-06-27 20:00:50,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=893, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-27 20:00:50,392 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-27 20:00:50,392 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 893 flow [2024-06-27 20:00:50,393 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) [2024-06-27 20:00:50,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:50,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:50,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:00:50,393 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)] === [2024-06-27 20:00:50,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1930341911, now seen corresponding path program 4 times [2024-06-27 20:00:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:50,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955287125] [2024-06-27 20:00:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:51,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955287125] [2024-06-27 20:00:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955287125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:51,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:51,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:00:51,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958750912] [2024-06-27 20:00:51,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:00:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:00:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:00:51,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:51,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 893 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) [2024-06-27 20:00:51,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:51,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:51,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:52,810 INFO L124 PetriNetUnfolderBase]: 9162/12767 cut-off events. [2024-06-27 20:00:52,810 INFO L125 PetriNetUnfolderBase]: For 119073/119103 co-relation queries the response was YES. [2024-06-27 20:00:52,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57759 conditions, 12767 events. 9162/12767 cut-off events. For 119073/119103 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 71191 event pairs, 4404 based on Foata normal form. 3/12747 useless extension candidates. Maximal degree in co-relation 57727. Up to 12241 conditions per place. [2024-06-27 20:00:52,902 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 89 selfloop transitions, 50 changer transitions 0/147 dead transitions. [2024-06-27 20:00:52,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 147 transitions, 1269 flow [2024-06-27 20:00:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:00:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:00:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 20:00:52,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-27 20:00:52,903 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 893 flow. Second operand 7 states and 186 transitions. [2024-06-27 20:00:52,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 147 transitions, 1269 flow [2024-06-27 20:00:52,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 147 transitions, 1133 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 20:00:52,956 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 868 flow [2024-06-27 20:00:52,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=868, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-27 20:00:52,956 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-27 20:00:52,957 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 868 flow [2024-06-27 20:00:52,957 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) [2024-06-27 20:00:52,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:52,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:52,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:00:52,957 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:00:52,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2005012101, now seen corresponding path program 1 times [2024-06-27 20:00:52,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:52,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587789098] [2024-06-27 20:00:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:52,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:53,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:53,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587789098] [2024-06-27 20:00:53,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587789098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:53,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:53,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:00:53,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939942730] [2024-06-27 20:00:53,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:53,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:00:53,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:53,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:00:53,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:00:53,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-27 20:00:53,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 868 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) [2024-06-27 20:00:53,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:53,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-27 20:00:53,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:55,021 INFO L124 PetriNetUnfolderBase]: 8714/12900 cut-off events. [2024-06-27 20:00:55,021 INFO L125 PetriNetUnfolderBase]: For 125258/125275 co-relation queries the response was YES. [2024-06-27 20:00:55,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56685 conditions, 12900 events. 8714/12900 cut-off events. For 125258/125275 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 78883 event pairs, 4643 based on Foata normal form. 19/12900 useless extension candidates. Maximal degree in co-relation 56652. Up to 11776 conditions per place. [2024-06-27 20:00:55,144 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 101 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2024-06-27 20:00:55,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 135 transitions, 1174 flow [2024-06-27 20:00:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:00:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:00:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-27 20:00:55,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169811320754717 [2024-06-27 20:00:55,145 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 868 flow. Second operand 5 states and 137 transitions. [2024-06-27 20:00:55,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 135 transitions, 1174 flow [2024-06-27 20:00:55,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 1040 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:55,231 INFO L231 Difference]: Finished difference. Result has 93 places, 120 transitions, 809 flow [2024-06-27 20:00:55,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=809, PETRI_PLACES=93, PETRI_TRANSITIONS=120} [2024-06-27 20:00:55,232 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-27 20:00:55,232 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 120 transitions, 809 flow [2024-06-27 20:00:55,232 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) [2024-06-27 20:00:55,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:55,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:55,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:00:55,233 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:00:55,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1866226803, now seen corresponding path program 1 times [2024-06-27 20:00:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:55,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027636266] [2024-06-27 20:00:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:55,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:56,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:56,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027636266] [2024-06-27 20:00:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027636266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:56,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:56,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494840864] [2024-06-27 20:00:56,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:56,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:56,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:56,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:56,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:56,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 120 transitions, 809 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) [2024-06-27 20:00:56,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:56,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:56,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:57,941 INFO L124 PetriNetUnfolderBase]: 9170/12749 cut-off events. [2024-06-27 20:00:57,941 INFO L125 PetriNetUnfolderBase]: For 144917/144969 co-relation queries the response was YES. [2024-06-27 20:00:57,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61628 conditions, 12749 events. 9170/12749 cut-off events. For 144917/144969 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 70638 event pairs, 4298 based on Foata normal form. 11/12747 useless extension candidates. Maximal degree in co-relation 61594. Up to 12313 conditions per place. [2024-06-27 20:00:58,060 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 123 selfloop transitions, 38 changer transitions 0/169 dead transitions. [2024-06-27 20:00:58,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 169 transitions, 1337 flow [2024-06-27 20:00:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 20:00:58,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-27 20:00:58,064 INFO L175 Difference]: Start difference. First operand has 93 places, 120 transitions, 809 flow. Second operand 8 states and 213 transitions. [2024-06-27 20:00:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 169 transitions, 1337 flow [2024-06-27 20:00:58,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 169 transitions, 1292 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:00:58,123 INFO L231 Difference]: Finished difference. Result has 98 places, 124 transitions, 916 flow [2024-06-27 20:00:58,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=916, PETRI_PLACES=98, PETRI_TRANSITIONS=124} [2024-06-27 20:00:58,124 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-27 20:00:58,124 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 124 transitions, 916 flow [2024-06-27 20:00:58,124 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) [2024-06-27 20:00:58,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:58,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:58,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:00:58,125 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)] === [2024-06-27 20:00:58,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1448211273, now seen corresponding path program 2 times [2024-06-27 20:00:58,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:58,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579465630] [2024-06-27 20:00:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:58,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:59,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579465630] [2024-06-27 20:00:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579465630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:59,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:59,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831405265] [2024-06-27 20:00:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:59,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:59,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:59,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:00:59,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 124 transitions, 916 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) [2024-06-27 20:00:59,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:59,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:00:59,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:00,887 INFO L124 PetriNetUnfolderBase]: 9223/12849 cut-off events. [2024-06-27 20:01:00,887 INFO L125 PetriNetUnfolderBase]: For 167351/167425 co-relation queries the response was YES. [2024-06-27 20:01:00,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65392 conditions, 12849 events. 9223/12849 cut-off events. For 167351/167425 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71701 event pairs, 4244 based on Foata normal form. 25/12856 useless extension candidates. Maximal degree in co-relation 65357. Up to 12175 conditions per place. [2024-06-27 20:01:00,984 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 98 selfloop transitions, 76 changer transitions 0/182 dead transitions. [2024-06-27 20:01:00,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 182 transitions, 1770 flow [2024-06-27 20:01:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 20:01:00,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-27 20:01:00,986 INFO L175 Difference]: Start difference. First operand has 98 places, 124 transitions, 916 flow. Second operand 8 states and 223 transitions. [2024-06-27 20:01:00,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 182 transitions, 1770 flow [2024-06-27 20:01:01,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 182 transitions, 1652 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:01,069 INFO L231 Difference]: Finished difference. Result has 100 places, 136 transitions, 1161 flow [2024-06-27 20:01:01,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1161, PETRI_PLACES=100, PETRI_TRANSITIONS=136} [2024-06-27 20:01:01,070 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-27 20:01:01,070 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 136 transitions, 1161 flow [2024-06-27 20:01:01,070 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) [2024-06-27 20:01:01,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:01,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:01,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:01:01,070 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)] === [2024-06-27 20:01:01,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2022341013, now seen corresponding path program 3 times [2024-06-27 20:01:01,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:01,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135967024] [2024-06-27 20:01:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:02,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:02,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135967024] [2024-06-27 20:01:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135967024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522583918] [2024-06-27 20:01:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:02,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:02,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:02,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:02,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 136 transitions, 1161 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) [2024-06-27 20:01:02,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:02,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:02,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:03,795 INFO L124 PetriNetUnfolderBase]: 9214/12829 cut-off events. [2024-06-27 20:01:03,795 INFO L125 PetriNetUnfolderBase]: For 194118/194184 co-relation queries the response was YES. [2024-06-27 20:01:03,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68499 conditions, 12829 events. 9214/12829 cut-off events. For 194118/194184 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71310 event pairs, 4244 based on Foata normal form. 41/12858 useless extension candidates. Maximal degree in co-relation 68463. Up to 12166 conditions per place. [2024-06-27 20:01:04,032 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 97 selfloop transitions, 74 changer transitions 0/179 dead transitions. [2024-06-27 20:01:04,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 179 transitions, 1729 flow [2024-06-27 20:01:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 20:01:04,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-27 20:01:04,034 INFO L175 Difference]: Start difference. First operand has 100 places, 136 transitions, 1161 flow. Second operand 8 states and 221 transitions. [2024-06-27 20:01:04,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 179 transitions, 1729 flow [2024-06-27 20:01:04,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 179 transitions, 1598 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-27 20:01:04,105 INFO L231 Difference]: Finished difference. Result has 105 places, 136 transitions, 1189 flow [2024-06-27 20:01:04,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1189, PETRI_PLACES=105, PETRI_TRANSITIONS=136} [2024-06-27 20:01:04,105 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-27 20:01:04,105 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 136 transitions, 1189 flow [2024-06-27 20:01:04,106 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) [2024-06-27 20:01:04,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:04,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:04,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:01:04,106 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)] === [2024-06-27 20:01:04,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1359407787, now seen corresponding path program 4 times [2024-06-27 20:01:04,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:04,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173807693] [2024-06-27 20:01:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:04,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:05,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:05,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173807693] [2024-06-27 20:01:05,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173807693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:05,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:05,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:05,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712214990] [2024-06-27 20:01:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:05,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:05,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:05,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:05,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 136 transitions, 1189 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) [2024-06-27 20:01:05,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:05,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:05,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:06,843 INFO L124 PetriNetUnfolderBase]: 9236/12882 cut-off events. [2024-06-27 20:01:06,843 INFO L125 PetriNetUnfolderBase]: For 210559/210631 co-relation queries the response was YES. [2024-06-27 20:01:06,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69924 conditions, 12882 events. 9236/12882 cut-off events. For 210559/210631 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71708 event pairs, 4244 based on Foata normal form. 19/12884 useless extension candidates. Maximal degree in co-relation 69886. Up to 12189 conditions per place. [2024-06-27 20:01:06,945 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 91 selfloop transitions, 82 changer transitions 0/181 dead transitions. [2024-06-27 20:01:06,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 1841 flow [2024-06-27 20:01:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-27 20:01:06,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-27 20:01:06,946 INFO L175 Difference]: Start difference. First operand has 105 places, 136 transitions, 1189 flow. Second operand 8 states and 216 transitions. [2024-06-27 20:01:06,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 1841 flow [2024-06-27 20:01:07,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 181 transitions, 1660 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:07,035 INFO L231 Difference]: Finished difference. Result has 106 places, 140 transitions, 1263 flow [2024-06-27 20:01:07,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1263, PETRI_PLACES=106, PETRI_TRANSITIONS=140} [2024-06-27 20:01:07,036 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-27 20:01:07,036 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 140 transitions, 1263 flow [2024-06-27 20:01:07,036 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) [2024-06-27 20:01:07,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:07,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:07,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:01:07,037 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)] === [2024-06-27 20:01:07,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:07,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2010261483, now seen corresponding path program 5 times [2024-06-27 20:01:07,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:07,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348853242] [2024-06-27 20:01:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:07,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:07,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348853242] [2024-06-27 20:01:07,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348853242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882330042] [2024-06-27 20:01:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:07,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:07,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:08,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:08,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 140 transitions, 1263 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) [2024-06-27 20:01:08,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:08,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:08,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:09,800 INFO L124 PetriNetUnfolderBase]: 9258/12920 cut-off events. [2024-06-27 20:01:09,800 INFO L125 PetriNetUnfolderBase]: For 227632/227708 co-relation queries the response was YES. [2024-06-27 20:01:09,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71154 conditions, 12920 events. 9258/12920 cut-off events. For 227632/227708 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 72028 event pairs, 4244 based on Foata normal form. 35/12941 useless extension candidates. Maximal degree in co-relation 71115. Up to 12212 conditions per place. [2024-06-27 20:01:09,900 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 94 selfloop transitions, 83 changer transitions 0/185 dead transitions. [2024-06-27 20:01:09,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 185 transitions, 1929 flow [2024-06-27 20:01:09,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 20:01:09,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117924528301887 [2024-06-27 20:01:09,902 INFO L175 Difference]: Start difference. First operand has 106 places, 140 transitions, 1263 flow. Second operand 8 states and 217 transitions. [2024-06-27 20:01:09,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 185 transitions, 1929 flow [2024-06-27 20:01:10,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 185 transitions, 1723 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:10,023 INFO L231 Difference]: Finished difference. Result has 109 places, 144 transitions, 1314 flow [2024-06-27 20:01:10,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=109, PETRI_TRANSITIONS=144} [2024-06-27 20:01:10,024 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-27 20:01:10,024 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 144 transitions, 1314 flow [2024-06-27 20:01:10,024 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) [2024-06-27 20:01:10,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:10,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:10,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:01:10,025 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)] === [2024-06-27 20:01:10,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash 288950127, now seen corresponding path program 6 times [2024-06-27 20:01:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:10,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327310065] [2024-06-27 20:01:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:10,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:10,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327310065] [2024-06-27 20:01:10,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327310065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:10,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:10,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:10,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497118713] [2024-06-27 20:01:10,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:10,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:10,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:10,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:10,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:11,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:11,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 144 transitions, 1314 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) [2024-06-27 20:01:11,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:11,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:11,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:12,872 INFO L124 PetriNetUnfolderBase]: 9249/12908 cut-off events. [2024-06-27 20:01:12,872 INFO L125 PetriNetUnfolderBase]: For 244227/244303 co-relation queries the response was YES. [2024-06-27 20:01:12,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71887 conditions, 12908 events. 9249/12908 cut-off events. For 244227/244303 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 71978 event pairs, 4244 based on Foata normal form. 35/12929 useless extension candidates. Maximal degree in co-relation 71847. Up to 12203 conditions per place. [2024-06-27 20:01:12,969 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 92 selfloop transitions, 82 changer transitions 0/182 dead transitions. [2024-06-27 20:01:12,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 182 transitions, 1782 flow [2024-06-27 20:01:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 20:01:12,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-27 20:01:12,972 INFO L175 Difference]: Start difference. First operand has 109 places, 144 transitions, 1314 flow. Second operand 8 states and 215 transitions. [2024-06-27 20:01:12,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 182 transitions, 1782 flow [2024-06-27 20:01:13,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 182 transitions, 1500 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:13,115 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1207 flow [2024-06-27 20:01:13,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1207, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-06-27 20:01:13,115 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-27 20:01:13,116 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1207 flow [2024-06-27 20:01:13,116 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) [2024-06-27 20:01:13,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:13,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:01:13,116 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)] === [2024-06-27 20:01:13,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2065690216, now seen corresponding path program 1 times [2024-06-27 20:01:13,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:13,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560337818] [2024-06-27 20:01:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:13,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:14,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:14,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560337818] [2024-06-27 20:01:14,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560337818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:14,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:14,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:14,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686433889] [2024-06-27 20:01:14,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:14,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:14,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:14,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:14,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:14,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 144 transitions, 1207 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) [2024-06-27 20:01:14,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:14,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:14,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:16,015 INFO L124 PetriNetUnfolderBase]: 9902/14187 cut-off events. [2024-06-27 20:01:16,015 INFO L125 PetriNetUnfolderBase]: For 266371/266373 co-relation queries the response was YES. [2024-06-27 20:01:16,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76575 conditions, 14187 events. 9902/14187 cut-off events. For 266371/266373 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 81702 event pairs, 4459 based on Foata normal form. 6/14173 useless extension candidates. Maximal degree in co-relation 76534. Up to 13371 conditions per place. [2024-06-27 20:01:16,137 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 161 selfloop transitions, 21 changer transitions 0/190 dead transitions. [2024-06-27 20:01:16,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 1782 flow [2024-06-27 20:01:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 20:01:16,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-27 20:01:16,138 INFO L175 Difference]: Start difference. First operand has 111 places, 144 transitions, 1207 flow. Second operand 8 states and 207 transitions. [2024-06-27 20:01:16,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 1782 flow [2024-06-27 20:01:16,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 190 transitions, 1562 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:16,292 INFO L231 Difference]: Finished difference. Result has 112 places, 151 transitions, 1141 flow [2024-06-27 20:01:16,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1141, PETRI_PLACES=112, PETRI_TRANSITIONS=151} [2024-06-27 20:01:16,293 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-27 20:01:16,293 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 151 transitions, 1141 flow [2024-06-27 20:01:16,293 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) [2024-06-27 20:01:16,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:16,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:16,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:01:16,293 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)] === [2024-06-27 20:01:16,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:16,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2063200898, now seen corresponding path program 1 times [2024-06-27 20:01:16,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:16,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649329695] [2024-06-27 20:01:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:16,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:17,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:17,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649329695] [2024-06-27 20:01:17,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649329695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:17,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:17,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784676009] [2024-06-27 20:01:17,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:17,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:17,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:17,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 151 transitions, 1141 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) [2024-06-27 20:01:17,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:17,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:17,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:19,403 INFO L124 PetriNetUnfolderBase]: 11053/15399 cut-off events. [2024-06-27 20:01:19,403 INFO L125 PetriNetUnfolderBase]: For 349265/349478 co-relation queries the response was YES. [2024-06-27 20:01:19,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89736 conditions, 15399 events. 11053/15399 cut-off events. For 349265/349478 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 86875 event pairs, 3976 based on Foata normal form. 14/15395 useless extension candidates. Maximal degree in co-relation 89693. Up to 14726 conditions per place. [2024-06-27 20:01:19,544 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 162 selfloop transitions, 43 changer transitions 0/214 dead transitions. [2024-06-27 20:01:19,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 214 transitions, 1985 flow [2024-06-27 20:01:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 20:01:19,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073375262054507 [2024-06-27 20:01:19,546 INFO L175 Difference]: Start difference. First operand has 112 places, 151 transitions, 1141 flow. Second operand 9 states and 242 transitions. [2024-06-27 20:01:19,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 214 transitions, 1985 flow [2024-06-27 20:01:19,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 214 transitions, 1895 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:19,734 INFO L231 Difference]: Finished difference. Result has 116 places, 157 transitions, 1281 flow [2024-06-27 20:01:19,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1281, PETRI_PLACES=116, PETRI_TRANSITIONS=157} [2024-06-27 20:01:19,735 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-27 20:01:19,735 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 157 transitions, 1281 flow [2024-06-27 20:01:19,735 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) [2024-06-27 20:01:19,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:19,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:19,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:01:19,735 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)] === [2024-06-27 20:01:19,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2060343938, now seen corresponding path program 2 times [2024-06-27 20:01:19,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:19,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297549795] [2024-06-27 20:01:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:20,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:20,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297549795] [2024-06-27 20:01:20,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297549795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:20,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:20,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:20,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265751545] [2024-06-27 20:01:20,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:20,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:20,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:20,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:20,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:20,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:20,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 157 transitions, 1281 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) [2024-06-27 20:01:20,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:20,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:20,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:22,713 INFO L124 PetriNetUnfolderBase]: 11002/15329 cut-off events. [2024-06-27 20:01:22,713 INFO L125 PetriNetUnfolderBase]: For 384013/384242 co-relation queries the response was YES. [2024-06-27 20:01:22,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92076 conditions, 15329 events. 11002/15329 cut-off events. For 384013/384242 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 86695 event pairs, 4808 based on Foata normal form. 14/15325 useless extension candidates. Maximal degree in co-relation 92032. Up to 14768 conditions per place. [2024-06-27 20:01:22,883 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 157 selfloop transitions, 37 changer transitions 0/203 dead transitions. [2024-06-27 20:01:22,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 203 transitions, 1821 flow [2024-06-27 20:01:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 20:01:22,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-27 20:01:22,884 INFO L175 Difference]: Start difference. First operand has 116 places, 157 transitions, 1281 flow. Second operand 8 states and 213 transitions. [2024-06-27 20:01:22,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 203 transitions, 1821 flow [2024-06-27 20:01:23,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 203 transitions, 1668 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:23,114 INFO L231 Difference]: Finished difference. Result has 119 places, 157 transitions, 1213 flow [2024-06-27 20:01:23,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1213, PETRI_PLACES=119, PETRI_TRANSITIONS=157} [2024-06-27 20:01:23,114 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-27 20:01:23,114 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 157 transitions, 1213 flow [2024-06-27 20:01:23,114 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) [2024-06-27 20:01:23,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:23,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:01:23,115 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)] === [2024-06-27 20:01:23,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:23,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1945052768, now seen corresponding path program 3 times [2024-06-27 20:01:23,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:23,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662355160] [2024-06-27 20:01:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:24,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:24,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662355160] [2024-06-27 20:01:24,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662355160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:24,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:24,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:24,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312654620] [2024-06-27 20:01:24,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:24,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:24,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:24,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 157 transitions, 1213 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) [2024-06-27 20:01:24,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:24,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:24,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:26,166 INFO L124 PetriNetUnfolderBase]: 11038/15380 cut-off events. [2024-06-27 20:01:26,166 INFO L125 PetriNetUnfolderBase]: For 411593/411821 co-relation queries the response was YES. [2024-06-27 20:01:26,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93374 conditions, 15380 events. 11038/15380 cut-off events. For 411593/411821 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 86965 event pairs, 4821 based on Foata normal form. 10/15371 useless extension candidates. Maximal degree in co-relation 93328. Up to 14745 conditions per place. [2024-06-27 20:01:26,294 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 139 selfloop transitions, 53 changer transitions 0/201 dead transitions. [2024-06-27 20:01:26,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 201 transitions, 1795 flow [2024-06-27 20:01:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 20:01:26,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-27 20:01:26,295 INFO L175 Difference]: Start difference. First operand has 119 places, 157 transitions, 1213 flow. Second operand 8 states and 214 transitions. [2024-06-27 20:01:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 201 transitions, 1795 flow [2024-06-27 20:01:26,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 201 transitions, 1711 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:26,490 INFO L231 Difference]: Finished difference. Result has 120 places, 160 transitions, 1321 flow [2024-06-27 20:01:26,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=120, PETRI_TRANSITIONS=160} [2024-06-27 20:01:26,491 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-27 20:01:26,491 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 160 transitions, 1321 flow [2024-06-27 20:01:26,491 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) [2024-06-27 20:01:26,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:26,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:26,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:01:26,492 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:26,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:26,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1608879800, now seen corresponding path program 1 times [2024-06-27 20:01:26,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:26,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114751737] [2024-06-27 20:01:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:27,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114751737] [2024-06-27 20:01:27,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114751737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:27,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:27,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:01:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997800313] [2024-06-27 20:01:27,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:27,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:01:27,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:27,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:01:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:01:27,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:01:27,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 160 transitions, 1321 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) [2024-06-27 20:01:27,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:27,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:01:27,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:29,138 INFO L124 PetriNetUnfolderBase]: 10194/14566 cut-off events. [2024-06-27 20:01:29,138 INFO L125 PetriNetUnfolderBase]: For 439798/439843 co-relation queries the response was YES. [2024-06-27 20:01:29,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89645 conditions, 14566 events. 10194/14566 cut-off events. For 439798/439843 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 85195 event pairs, 4917 based on Foata normal form. 23/14531 useless extension candidates. Maximal degree in co-relation 89598. Up to 13654 conditions per place. [2024-06-27 20:01:29,259 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 135 selfloop transitions, 35 changer transitions 0/196 dead transitions. [2024-06-27 20:01:29,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 196 transitions, 1955 flow [2024-06-27 20:01:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:01:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:01:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-27 20:01:29,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-27 20:01:29,260 INFO L175 Difference]: Start difference. First operand has 120 places, 160 transitions, 1321 flow. Second operand 6 states and 168 transitions. [2024-06-27 20:01:29,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 196 transitions, 1955 flow [2024-06-27 20:01:29,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 196 transitions, 1789 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:29,490 INFO L231 Difference]: Finished difference. Result has 120 places, 168 transitions, 1362 flow [2024-06-27 20:01:29,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1362, PETRI_PLACES=120, PETRI_TRANSITIONS=168} [2024-06-27 20:01:29,491 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-27 20:01:29,491 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 168 transitions, 1362 flow [2024-06-27 20:01:29,491 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) [2024-06-27 20:01:29,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:29,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:29,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:01:29,491 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:29,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash 367343080, now seen corresponding path program 4 times [2024-06-27 20:01:29,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:29,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910082095] [2024-06-27 20:01:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:29,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:30,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:30,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910082095] [2024-06-27 20:01:30,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910082095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:30,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:30,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391727577] [2024-06-27 20:01:30,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:30,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:30,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:30,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:30,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 168 transitions, 1362 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) [2024-06-27 20:01:30,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:30,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:30,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:32,761 INFO L124 PetriNetUnfolderBase]: 11087/15457 cut-off events. [2024-06-27 20:01:32,761 INFO L125 PetriNetUnfolderBase]: For 486008/486233 co-relation queries the response was YES. [2024-06-27 20:01:32,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99688 conditions, 15457 events. 11087/15457 cut-off events. For 486008/486233 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 87528 event pairs, 4795 based on Foata normal form. 6/15439 useless extension candidates. Maximal degree in co-relation 99640. Up to 14808 conditions per place. [2024-06-27 20:01:32,881 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 148 selfloop transitions, 53 changer transitions 0/210 dead transitions. [2024-06-27 20:01:32,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 210 transitions, 1964 flow [2024-06-27 20:01:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 20:01:32,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-27 20:01:32,883 INFO L175 Difference]: Start difference. First operand has 120 places, 168 transitions, 1362 flow. Second operand 8 states and 211 transitions. [2024-06-27 20:01:32,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 210 transitions, 1964 flow [2024-06-27 20:01:33,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 210 transitions, 1908 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 20:01:33,097 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1506 flow [2024-06-27 20:01:33,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1506, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-06-27 20:01:33,097 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-27 20:01:33,097 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1506 flow [2024-06-27 20:01:33,098 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) [2024-06-27 20:01:33,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:33,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:33,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:01:33,098 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:33,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:33,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1623657500, now seen corresponding path program 2 times [2024-06-27 20:01:33,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:33,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091940032] [2024-06-27 20:01:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:33,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:33,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:33,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091940032] [2024-06-27 20:01:33,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091940032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:33,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:33,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:01:33,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917424325] [2024-06-27 20:01:33,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:33,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:01:33,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:01:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:01:33,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:01:33,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1506 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) [2024-06-27 20:01:33,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:33,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:01:33,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:35,687 INFO L124 PetriNetUnfolderBase]: 10163/14514 cut-off events. [2024-06-27 20:01:35,687 INFO L125 PetriNetUnfolderBase]: For 510956/510971 co-relation queries the response was YES. [2024-06-27 20:01:35,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94748 conditions, 14514 events. 10163/14514 cut-off events. For 510956/510971 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 84682 event pairs, 4913 based on Foata normal form. 17/14468 useless extension candidates. Maximal degree in co-relation 94698. Up to 13625 conditions per place. [2024-06-27 20:01:35,829 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 129 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2024-06-27 20:01:35,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 191 transitions, 1894 flow [2024-06-27 20:01:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:01:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:01:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 20:01:35,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:01:35,831 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1506 flow. Second operand 6 states and 159 transitions. [2024-06-27 20:01:35,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 191 transitions, 1894 flow [2024-06-27 20:01:36,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 191 transitions, 1690 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:36,156 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1381 flow [2024-06-27 20:01:36,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1381, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-06-27 20:01:36,156 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-27 20:01:36,157 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1381 flow [2024-06-27 20:01:36,157 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) [2024-06-27 20:01:36,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:36,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:36,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:01:36,157 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:36,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1833480608, now seen corresponding path program 1 times [2024-06-27 20:01:36,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:36,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021397403] [2024-06-27 20:01:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:36,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021397403] [2024-06-27 20:01:36,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021397403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:36,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:36,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:01:36,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546439405] [2024-06-27 20:01:36,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:36,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:01:36,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:36,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:01:36,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:01:37,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:37,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1381 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:37,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:37,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:37,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:38,840 INFO L124 PetriNetUnfolderBase]: 10063/14394 cut-off events. [2024-06-27 20:01:38,840 INFO L125 PetriNetUnfolderBase]: For 473028/473030 co-relation queries the response was YES. [2024-06-27 20:01:38,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92182 conditions, 14394 events. 10063/14394 cut-off events. For 473028/473030 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 82655 event pairs, 4262 based on Foata normal form. 4/14365 useless extension candidates. Maximal degree in co-relation 92131. Up to 13591 conditions per place. [2024-06-27 20:01:39,002 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 176 selfloop transitions, 21 changer transitions 0/205 dead transitions. [2024-06-27 20:01:39,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 205 transitions, 2099 flow [2024-06-27 20:01:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:01:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:01:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 20:01:39,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-27 20:01:39,003 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1381 flow. Second operand 6 states and 160 transitions. [2024-06-27 20:01:39,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 205 transitions, 2099 flow [2024-06-27 20:01:39,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 205 transitions, 1994 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:39,279 INFO L231 Difference]: Finished difference. Result has 127 places, 179 transitions, 1475 flow [2024-06-27 20:01:39,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1475, PETRI_PLACES=127, PETRI_TRANSITIONS=179} [2024-06-27 20:01:39,280 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 20:01:39,280 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 179 transitions, 1475 flow [2024-06-27 20:01:39,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:39,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:39,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:39,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:01:39,281 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:39,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1595282828, now seen corresponding path program 2 times [2024-06-27 20:01:39,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:39,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900968532] [2024-06-27 20:01:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:39,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:39,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900968532] [2024-06-27 20:01:39,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900968532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:39,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:39,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:01:39,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702583485] [2024-06-27 20:01:39,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:39,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:01:39,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:39,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:01:39,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:01:40,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:40,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 179 transitions, 1475 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:40,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:40,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:40,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:41,840 INFO L124 PetriNetUnfolderBase]: 10049/14380 cut-off events. [2024-06-27 20:01:41,840 INFO L125 PetriNetUnfolderBase]: For 506936/506943 co-relation queries the response was YES. [2024-06-27 20:01:41,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94873 conditions, 14380 events. 10049/14380 cut-off events. For 506936/506943 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 82498 event pairs, 4239 based on Foata normal form. 8/14359 useless extension candidates. Maximal degree in co-relation 94821. Up to 13579 conditions per place. [2024-06-27 20:01:41,974 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 170 selfloop transitions, 21 changer transitions 0/199 dead transitions. [2024-06-27 20:01:41,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 199 transitions, 1917 flow [2024-06-27 20:01:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:01:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:01:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 20:01:41,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-27 20:01:41,975 INFO L175 Difference]: Start difference. First operand has 127 places, 179 transitions, 1475 flow. Second operand 6 states and 154 transitions. [2024-06-27 20:01:41,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 199 transitions, 1917 flow [2024-06-27 20:01:42,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 199 transitions, 1801 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-27 20:01:42,261 INFO L231 Difference]: Finished difference. Result has 131 places, 179 transitions, 1410 flow [2024-06-27 20:01:42,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1410, PETRI_PLACES=131, PETRI_TRANSITIONS=179} [2024-06-27 20:01:42,261 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-27 20:01:42,261 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 179 transitions, 1410 flow [2024-06-27 20:01:42,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:42,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:42,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:42,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:01:42,262 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)] === [2024-06-27 20:01:42,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:42,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1081568820, now seen corresponding path program 1 times [2024-06-27 20:01:42,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:42,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772808250] [2024-06-27 20:01:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:42,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772808250] [2024-06-27 20:01:43,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772808250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:43,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:43,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566884103] [2024-06-27 20:01:43,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:43,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:43,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:43,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:43,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 179 transitions, 1410 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) [2024-06-27 20:01:43,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:43,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:43,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:45,770 INFO L124 PetriNetUnfolderBase]: 11351/15901 cut-off events. [2024-06-27 20:01:45,771 INFO L125 PetriNetUnfolderBase]: For 658738/658943 co-relation queries the response was YES. [2024-06-27 20:01:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110958 conditions, 15901 events. 11351/15901 cut-off events. For 658738/658943 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 90982 event pairs, 4035 based on Foata normal form. 36/15914 useless extension candidates. Maximal degree in co-relation 110904. Up to 14824 conditions per place. [2024-06-27 20:01:45,949 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 196 selfloop transitions, 48 changer transitions 0/253 dead transitions. [2024-06-27 20:01:45,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 253 transitions, 2446 flow [2024-06-27 20:01:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:01:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:01:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-06-27 20:01:45,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-27 20:01:45,951 INFO L175 Difference]: Start difference. First operand has 131 places, 179 transitions, 1410 flow. Second operand 10 states and 272 transitions. [2024-06-27 20:01:45,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 253 transitions, 2446 flow [2024-06-27 20:01:46,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 253 transitions, 2381 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:46,366 INFO L231 Difference]: Finished difference. Result has 136 places, 183 transitions, 1594 flow [2024-06-27 20:01:46,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1594, PETRI_PLACES=136, PETRI_TRANSITIONS=183} [2024-06-27 20:01:46,367 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 80 predicate places. [2024-06-27 20:01:46,367 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 183 transitions, 1594 flow [2024-06-27 20:01:46,367 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) [2024-06-27 20:01:46,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:46,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:46,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:01:46,368 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:46,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1209453132, now seen corresponding path program 2 times [2024-06-27 20:01:46,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:46,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442587252] [2024-06-27 20:01:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:47,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:47,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442587252] [2024-06-27 20:01:47,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442587252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:47,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:47,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:47,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237832464] [2024-06-27 20:01:47,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:47,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:47,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:47,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:47,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:47,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:47,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 183 transitions, 1594 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) [2024-06-27 20:01:47,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:47,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:47,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:49,914 INFO L124 PetriNetUnfolderBase]: 11443/16051 cut-off events. [2024-06-27 20:01:49,914 INFO L125 PetriNetUnfolderBase]: For 708301/708518 co-relation queries the response was YES. [2024-06-27 20:01:49,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114456 conditions, 16051 events. 11443/16051 cut-off events. For 708301/708518 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 92139 event pairs, 4677 based on Foata normal form. 47/16081 useless extension candidates. Maximal degree in co-relation 114401. Up to 15078 conditions per place. [2024-06-27 20:01:50,070 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 195 selfloop transitions, 43 changer transitions 0/247 dead transitions. [2024-06-27 20:01:50,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 247 transitions, 2534 flow [2024-06-27 20:01:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 20:01:50,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-27 20:01:50,071 INFO L175 Difference]: Start difference. First operand has 136 places, 183 transitions, 1594 flow. Second operand 9 states and 246 transitions. [2024-06-27 20:01:50,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 247 transitions, 2534 flow [2024-06-27 20:01:50,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 247 transitions, 2425 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:50,396 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1654 flow [2024-06-27 20:01:50,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1654, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2024-06-27 20:01:50,397 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-27 20:01:50,397 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1654 flow [2024-06-27 20:01:50,397 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) [2024-06-27 20:01:50,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:50,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:50,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:01:50,398 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:50,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:50,398 INFO L85 PathProgramCache]: Analyzing trace with hash 553996876, now seen corresponding path program 3 times [2024-06-27 20:01:50,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:50,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961544310] [2024-06-27 20:01:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:50,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:51,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961544310] [2024-06-27 20:01:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961544310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:51,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:51,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994353058] [2024-06-27 20:01:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:51,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:51,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:51,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1654 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) [2024-06-27 20:01:51,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:51,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:51,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:54,157 INFO L124 PetriNetUnfolderBase]: 11389/15973 cut-off events. [2024-06-27 20:01:54,158 INFO L125 PetriNetUnfolderBase]: For 735709/735926 co-relation queries the response was YES. [2024-06-27 20:01:54,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113986 conditions, 15973 events. 11389/15973 cut-off events. For 735709/735926 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 91620 event pairs, 4677 based on Foata normal form. 53/16009 useless extension candidates. Maximal degree in co-relation 113929. Up to 15206 conditions per place. [2024-06-27 20:01:54,323 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 192 selfloop transitions, 40 changer transitions 0/241 dead transitions. [2024-06-27 20:01:54,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 241 transitions, 2318 flow [2024-06-27 20:01:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 20:01:54,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-27 20:01:54,325 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1654 flow. Second operand 9 states and 240 transitions. [2024-06-27 20:01:54,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 241 transitions, 2318 flow [2024-06-27 20:01:54,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 241 transitions, 2158 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:54,692 INFO L231 Difference]: Finished difference. Result has 141 places, 185 transitions, 1584 flow [2024-06-27 20:01:54,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1584, PETRI_PLACES=141, PETRI_TRANSITIONS=185} [2024-06-27 20:01:54,692 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-27 20:01:54,692 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 185 transitions, 1584 flow [2024-06-27 20:01:54,692 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) [2024-06-27 20:01:54,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:54,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:54,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:01:54,692 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:01:54,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash -161581770, now seen corresponding path program 4 times [2024-06-27 20:01:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:54,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425717304] [2024-06-27 20:01:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:54,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:55,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:55,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425717304] [2024-06-27 20:01:55,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425717304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:55,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:55,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:55,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775962743] [2024-06-27 20:01:55,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:55,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:55,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:55,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:01:55,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 185 transitions, 1584 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) [2024-06-27 20:01:55,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:55,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:01:55,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:58,751 INFO L124 PetriNetUnfolderBase]: 11517/16172 cut-off events. [2024-06-27 20:01:58,751 INFO L125 PetriNetUnfolderBase]: For 771507/771734 co-relation queries the response was YES. [2024-06-27 20:01:58,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115865 conditions, 16172 events. 11517/16172 cut-off events. For 771507/771734 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 93125 event pairs, 4838 based on Foata normal form. 92/16236 useless extension candidates. Maximal degree in co-relation 115807. Up to 15172 conditions per place. [2024-06-27 20:01:58,908 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 140 selfloop transitions, 89 changer transitions 0/238 dead transitions. [2024-06-27 20:01:58,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 238 transitions, 2292 flow [2024-06-27 20:01:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 20:01:58,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115303983228512 [2024-06-27 20:01:58,910 INFO L175 Difference]: Start difference. First operand has 141 places, 185 transitions, 1584 flow. Second operand 9 states and 244 transitions. [2024-06-27 20:01:58,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 238 transitions, 2292 flow [2024-06-27 20:01:59,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 238 transitions, 2203 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:01:59,287 INFO L231 Difference]: Finished difference. Result has 142 places, 187 transitions, 1761 flow [2024-06-27 20:01:59,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1761, PETRI_PLACES=142, PETRI_TRANSITIONS=187} [2024-06-27 20:01:59,287 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-27 20:01:59,287 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 187 transitions, 1761 flow [2024-06-27 20:01:59,287 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) [2024-06-27 20:01:59,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:59,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:59,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:01:59,288 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)] === [2024-06-27 20:01:59,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash -167088300, now seen corresponding path program 5 times [2024-06-27 20:01:59,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:59,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732438645] [2024-06-27 20:01:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732438645] [2024-06-27 20:02:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732438645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:00,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:00,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:00,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987280126] [2024-06-27 20:02:00,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:00,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:00,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:00,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:00,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:00,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:02:00,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 187 transitions, 1761 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) [2024-06-27 20:02:00,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:00,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:02:00,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:03,308 INFO L124 PetriNetUnfolderBase]: 11645/16396 cut-off events. [2024-06-27 20:02:03,309 INFO L125 PetriNetUnfolderBase]: For 829597/829848 co-relation queries the response was YES. [2024-06-27 20:02:03,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119873 conditions, 16396 events. 11645/16396 cut-off events. For 829597/829848 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 94959 event pairs, 4862 based on Foata normal form. 92/16454 useless extension candidates. Maximal degree in co-relation 119814. Up to 15364 conditions per place. [2024-06-27 20:02:03,481 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 144 selfloop transitions, 87 changer transitions 0/240 dead transitions. [2024-06-27 20:02:03,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 240 transitions, 2477 flow [2024-06-27 20:02:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 20:02:03,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136268343815513 [2024-06-27 20:02:03,482 INFO L175 Difference]: Start difference. First operand has 142 places, 187 transitions, 1761 flow. Second operand 9 states and 245 transitions. [2024-06-27 20:02:03,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 240 transitions, 2477 flow [2024-06-27 20:02:03,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 240 transitions, 2263 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:03,903 INFO L231 Difference]: Finished difference. Result has 144 places, 189 transitions, 1813 flow [2024-06-27 20:02:03,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1813, PETRI_PLACES=144, PETRI_TRANSITIONS=189} [2024-06-27 20:02:03,904 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-27 20:02:03,904 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 189 transitions, 1813 flow [2024-06-27 20:02:03,904 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) [2024-06-27 20:02:03,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:03,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:03,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:02:03,904 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)] === [2024-06-27 20:02:03,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:03,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2144395510, now seen corresponding path program 6 times [2024-06-27 20:02:03,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:03,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405270342] [2024-06-27 20:02:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:03,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:04,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:04,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405270342] [2024-06-27 20:02:04,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405270342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:04,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:04,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:04,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092103778] [2024-06-27 20:02:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:04,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:04,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:05,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:02:05,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 189 transitions, 1813 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) [2024-06-27 20:02:05,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:05,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:02:05,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:08,114 INFO L124 PetriNetUnfolderBase]: 11824/16632 cut-off events. [2024-06-27 20:02:08,114 INFO L125 PetriNetUnfolderBase]: For 889696/889923 co-relation queries the response was YES. [2024-06-27 20:02:08,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123690 conditions, 16632 events. 11824/16632 cut-off events. For 889696/889923 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 96036 event pairs, 4579 based on Foata normal form. 102/16706 useless extension candidates. Maximal degree in co-relation 123630. Up to 15303 conditions per place. [2024-06-27 20:02:08,275 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 143 selfloop transitions, 93 changer transitions 0/245 dead transitions. [2024-06-27 20:02:08,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 245 transitions, 2557 flow [2024-06-27 20:02:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-27 20:02:08,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178197064989518 [2024-06-27 20:02:08,277 INFO L175 Difference]: Start difference. First operand has 144 places, 189 transitions, 1813 flow. Second operand 9 states and 247 transitions. [2024-06-27 20:02:08,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 245 transitions, 2557 flow [2024-06-27 20:02:08,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 245 transitions, 2343 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:08,813 INFO L231 Difference]: Finished difference. Result has 146 places, 191 transitions, 1880 flow [2024-06-27 20:02:08,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1880, PETRI_PLACES=146, PETRI_TRANSITIONS=191} [2024-06-27 20:02:08,814 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-27 20:02:08,814 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 191 transitions, 1880 flow [2024-06-27 20:02:08,814 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) [2024-06-27 20:02:08,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:08,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:08,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:02:08,814 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)] === [2024-06-27 20:02:08,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1708218355, now seen corresponding path program 1 times [2024-06-27 20:02:08,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:08,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021032183] [2024-06-27 20:02:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:08,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:10,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:10,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021032183] [2024-06-27 20:02:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021032183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:10,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:10,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948777489] [2024-06-27 20:02:10,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:10,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:10,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:02:10,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 191 transitions, 1880 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:10,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:10,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:02:10,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:13,068 INFO L124 PetriNetUnfolderBase]: 12356/17310 cut-off events. [2024-06-27 20:02:13,069 INFO L125 PetriNetUnfolderBase]: For 934304/934315 co-relation queries the response was YES. [2024-06-27 20:02:13,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127205 conditions, 17310 events. 12356/17310 cut-off events. For 934304/934315 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 97995 event pairs, 4857 based on Foata normal form. 14/17314 useless extension candidates. Maximal degree in co-relation 127144. Up to 16618 conditions per place. [2024-06-27 20:02:13,251 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 194 selfloop transitions, 49 changer transitions 0/250 dead transitions. [2024-06-27 20:02:13,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 250 transitions, 2659 flow [2024-06-27 20:02:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 20:02:13,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48846960167714887 [2024-06-27 20:02:13,253 INFO L175 Difference]: Start difference. First operand has 146 places, 191 transitions, 1880 flow. Second operand 9 states and 233 transitions. [2024-06-27 20:02:13,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 250 transitions, 2659 flow [2024-06-27 20:02:13,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 250 transitions, 2408 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:13,721 INFO L231 Difference]: Finished difference. Result has 149 places, 198 transitions, 1871 flow [2024-06-27 20:02:13,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1871, PETRI_PLACES=149, PETRI_TRANSITIONS=198} [2024-06-27 20:02:13,722 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-27 20:02:13,722 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 198 transitions, 1871 flow [2024-06-27 20:02:13,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:13,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:13,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:13,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:02:13,722 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)] === [2024-06-27 20:02:13,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash 521571212, now seen corresponding path program 7 times [2024-06-27 20:02:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847676034] [2024-06-27 20:02:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:13,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:14,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:14,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847676034] [2024-06-27 20:02:14,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847676034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:14,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:14,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724400489] [2024-06-27 20:02:14,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:14,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:14,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:14,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:15,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:02:15,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 198 transitions, 1871 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) [2024-06-27 20:02:15,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:15,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:02:15,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:17,944 INFO L124 PetriNetUnfolderBase]: 11883/16868 cut-off events. [2024-06-27 20:02:17,945 INFO L125 PetriNetUnfolderBase]: For 994866/995068 co-relation queries the response was YES. [2024-06-27 20:02:18,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128662 conditions, 16868 events. 11883/16868 cut-off events. For 994866/995068 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 98791 event pairs, 4564 based on Foata normal form. 88/16922 useless extension candidates. Maximal degree in co-relation 128599. Up to 15710 conditions per place. [2024-06-27 20:02:18,124 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 149 selfloop transitions, 90 changer transitions 0/249 dead transitions. [2024-06-27 20:02:18,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 249 transitions, 2609 flow [2024-06-27 20:02:18,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 20:02:18,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052410901467506 [2024-06-27 20:02:18,126 INFO L175 Difference]: Start difference. First operand has 149 places, 198 transitions, 1871 flow. Second operand 9 states and 241 transitions. [2024-06-27 20:02:18,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 249 transitions, 2609 flow [2024-06-27 20:02:18,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 249 transitions, 2429 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:18,535 INFO L231 Difference]: Finished difference. Result has 152 places, 200 transitions, 1975 flow [2024-06-27 20:02:18,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1975, PETRI_PLACES=152, PETRI_TRANSITIONS=200} [2024-06-27 20:02:18,536 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-27 20:02:18,536 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 200 transitions, 1975 flow [2024-06-27 20:02:18,536 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) [2024-06-27 20:02:18,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:18,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:18,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:02:18,536 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:02:18,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1497264764, now seen corresponding path program 8 times [2024-06-27 20:02:18,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:18,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029655649] [2024-06-27 20:02:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:19,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:19,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029655649] [2024-06-27 20:02:19,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029655649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:19,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:19,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034566674] [2024-06-27 20:02:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:02:19,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 200 transitions, 1975 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) [2024-06-27 20:02:19,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:19,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:02:19,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:22,835 INFO L124 PetriNetUnfolderBase]: 12115/17189 cut-off events. [2024-06-27 20:02:22,835 INFO L125 PetriNetUnfolderBase]: For 1096797/1096991 co-relation queries the response was YES. [2024-06-27 20:02:22,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135192 conditions, 17189 events. 12115/17189 cut-off events. For 1096797/1096991 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 100970 event pairs, 4707 based on Foata normal form. 98/17264 useless extension candidates. Maximal degree in co-relation 135128. Up to 15642 conditions per place. [2024-06-27 20:02:23,025 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 153 selfloop transitions, 96 changer transitions 0/259 dead transitions. [2024-06-27 20:02:23,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 259 transitions, 3063 flow [2024-06-27 20:02:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-27 20:02:23,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-27 20:02:23,027 INFO L175 Difference]: Start difference. First operand has 152 places, 200 transitions, 1975 flow. Second operand 9 states and 246 transitions. [2024-06-27 20:02:23,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 259 transitions, 3063 flow [2024-06-27 20:02:23,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 259 transitions, 2831 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:23,482 INFO L231 Difference]: Finished difference. Result has 154 places, 204 transitions, 2136 flow [2024-06-27 20:02:23,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2136, PETRI_PLACES=154, PETRI_TRANSITIONS=204} [2024-06-27 20:02:23,483 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-27 20:02:23,483 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 204 transitions, 2136 flow [2024-06-27 20:02:23,483 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) [2024-06-27 20:02:23,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:23,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:23,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:02:23,483 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:02:23,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash 405397630, now seen corresponding path program 9 times [2024-06-27 20:02:23,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:23,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927797225] [2024-06-27 20:02:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:23,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:24,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:24,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927797225] [2024-06-27 20:02:24,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927797225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:24,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:24,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:24,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979038938] [2024-06-27 20:02:24,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:24,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:24,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:24,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:24,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:02:24,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 204 transitions, 2136 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) [2024-06-27 20:02:24,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:24,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:02:24,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:27,874 INFO L124 PetriNetUnfolderBase]: 12156/17264 cut-off events. [2024-06-27 20:02:27,874 INFO L125 PetriNetUnfolderBase]: For 1159842/1160052 co-relation queries the response was YES. [2024-06-27 20:02:27,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137534 conditions, 17264 events. 12156/17264 cut-off events. For 1159842/1160052 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 101900 event pairs, 4744 based on Foata normal form. 104/17345 useless extension candidates. Maximal degree in co-relation 137469. Up to 16166 conditions per place. [2024-06-27 20:02:28,208 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 156 selfloop transitions, 89 changer transitions 0/255 dead transitions. [2024-06-27 20:02:28,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 255 transitions, 2894 flow [2024-06-27 20:02:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 20:02:28,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073375262054507 [2024-06-27 20:02:28,209 INFO L175 Difference]: Start difference. First operand has 154 places, 204 transitions, 2136 flow. Second operand 9 states and 242 transitions. [2024-06-27 20:02:28,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 255 transitions, 2894 flow [2024-06-27 20:02:28,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 255 transitions, 2692 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:28,719 INFO L231 Difference]: Finished difference. Result has 158 places, 206 transitions, 2224 flow [2024-06-27 20:02:28,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2224, PETRI_PLACES=158, PETRI_TRANSITIONS=206} [2024-06-27 20:02:28,719 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-27 20:02:28,719 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 206 transitions, 2224 flow [2024-06-27 20:02:28,719 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) [2024-06-27 20:02:28,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:28,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:28,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:02:28,720 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:02:28,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:28,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1119601312, now seen corresponding path program 10 times [2024-06-27 20:02:28,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:28,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261017676] [2024-06-27 20:02:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:28,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:29,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261017676] [2024-06-27 20:02:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261017676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:29,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:29,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42088677] [2024-06-27 20:02:29,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:29,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:29,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:29,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:02:29,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 206 transitions, 2224 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) [2024-06-27 20:02:29,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:29,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:02:29,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:32,885 INFO L124 PetriNetUnfolderBase]: 12158/17266 cut-off events. [2024-06-27 20:02:32,885 INFO L125 PetriNetUnfolderBase]: For 1179908/1180102 co-relation queries the response was YES. [2024-06-27 20:02:32,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137049 conditions, 17266 events. 12158/17266 cut-off events. For 1179908/1180102 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 101732 event pairs, 4720 based on Foata normal form. 94/17337 useless extension candidates. Maximal degree in co-relation 136982. Up to 16116 conditions per place. [2024-06-27 20:02:33,075 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 152 selfloop transitions, 93 changer transitions 0/255 dead transitions. [2024-06-27 20:02:33,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 2884 flow [2024-06-27 20:02:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 20:02:33,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-27 20:02:33,081 INFO L175 Difference]: Start difference. First operand has 158 places, 206 transitions, 2224 flow. Second operand 9 states and 240 transitions. [2024-06-27 20:02:33,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 2884 flow [2024-06-27 20:02:33,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 255 transitions, 2626 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:33,884 INFO L231 Difference]: Finished difference. Result has 160 places, 206 transitions, 2162 flow [2024-06-27 20:02:33,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2162, PETRI_PLACES=160, PETRI_TRANSITIONS=206} [2024-06-27 20:02:33,885 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 104 predicate places. [2024-06-27 20:02:33,885 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 206 transitions, 2162 flow [2024-06-27 20:02:33,885 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) [2024-06-27 20:02:33,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:33,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:33,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:02:33,885 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:02:33,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:33,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1491539033, now seen corresponding path program 2 times [2024-06-27 20:02:33,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:33,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643111647] [2024-06-27 20:02:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:33,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat