./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix021_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix021_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix021_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix021_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:32:06,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:32:06,832 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:32:06,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:32:06,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:32:06,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:32:06,850 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:32:06,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:32:06,851 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:32:06,851 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:32:06,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:32:06,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:32:06,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:32:06,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:32:06,852 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:32:06,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:32:06,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:32:06,853 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:32:06,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:32:06,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:32:06,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:32:06,854 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:32:06,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:32:06,855 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:32:06,855 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:32:06,855 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:32:06,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:32:06,856 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:32:06,856 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:32:06,856 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:32:06,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:32:06,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:32:06,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:32:06,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:32:06,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:32:06,858 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:32:06,858 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:32:06,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:32:06,858 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:32:06,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:32:06,859 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:32:06,859 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:32:06,859 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:32:06,859 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:32:07,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:32:07,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:32:07,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:32:07,172 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:32:07,172 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:32:07,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix021_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:32:08,209 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:32:08,367 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:32:08,368 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix021_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:32:08,389 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e11a502/dad62196c03c4658a02d014b5e2033be/FLAGeddca1f45 [2024-06-21 16:32:08,399 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e11a502/dad62196c03c4658a02d014b5e2033be [2024-06-21 16:32:08,401 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:32:08,401 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:32:08,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix021_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 16:32:08,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:32:08,604 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:32:08,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:32:08,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:32:08,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:32:08,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:32:08" (1/2) ... [2024-06-21 16:32:08,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b06d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:32:08, skipping insertion in model container [2024-06-21 16:32:08,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:32:08" (1/2) ... [2024-06-21 16:32:08,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@619d97fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:32:08, skipping insertion in model container [2024-06-21 16:32:08,612 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:32:08" (2/2) ... [2024-06-21 16:32:08,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b06d0c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:08, skipping insertion in model container [2024-06-21 16:32:08,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:32:08" (2/2) ... [2024-06-21 16:32:08,613 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:32:08,716 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:32:08,717 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:32:08,717 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:32:08,717 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:32:08,718 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-21 16:32:08,718 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:32:08,718 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-21 16:32:08,755 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:32:09,029 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:32:09,044 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:32:09,203 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:32:09,241 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:32:09,242 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09 WrapperNode [2024-06-21 16:32:09,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:32:09,243 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:32:09,243 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:32:09,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:32:09,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,278 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,311 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-21 16:32:09,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:32:09,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:32:09,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:32:09,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:32:09,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,333 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,361 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:32:09,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,393 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,395 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:32:09,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:32:09,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:32:09,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:32:09,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (1/1) ... [2024-06-21 16:32:09,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:32:09,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:32:09,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:32:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:32:09,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:32:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:32:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:32:09,468 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:32:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:32:09,468 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:32:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:32:09,468 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:32:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:32:09,469 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:32:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:32:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:32:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:32:09,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:32:09,470 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:32:09,637 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:32:09,640 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:32:10,045 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:32:10,045 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:32:10,167 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:32:10,167 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:32:10,168 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:32:10 BoogieIcfgContainer [2024-06-21 16:32:10,168 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:32:10,170 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:32:10,171 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:32:10,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:32:10,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:32:08" (1/4) ... [2024-06-21 16:32:10,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500bb63b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:32:10, skipping insertion in model container [2024-06-21 16:32:10,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:32:08" (2/4) ... [2024-06-21 16:32:10,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500bb63b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:32:10, skipping insertion in model container [2024-06-21 16:32:10,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:32:09" (3/4) ... [2024-06-21 16:32:10,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500bb63b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:32:10, skipping insertion in model container [2024-06-21 16:32:10,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:32:10" (4/4) ... [2024-06-21 16:32:10,176 INFO L112 eAbstractionObserver]: Analyzing ICFG mix021_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:32:10,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:32:10,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:32:10,190 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:32:10,239 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:32:10,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 16:32:10,310 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 16:32:10,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:32:10,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:32:10,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 16:32:10,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 16:32:10,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:32:10,324 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;@78e6bd91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:32:10,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:32:10,327 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:32:10,327 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:32:10,327 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:32:10,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:10,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:32:10,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:10,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash 400592535, now seen corresponding path program 1 times [2024-06-21 16:32:10,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:10,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478793821] [2024-06-21 16:32:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:10,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:11,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:11,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478793821] [2024-06-21 16:32:11,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478793821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:11,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:11,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:32:11,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353372676] [2024-06-21 16:32:11,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:11,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:32:11,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:32:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:32:11,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:32:11,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:11,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:11,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:32:11,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:12,952 INFO L124 PetriNetUnfolderBase]: 11639/16207 cut-off events. [2024-06-21 16:32:12,952 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2024-06-21 16:32:12,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32423 conditions, 16207 events. 11639/16207 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 89292 event pairs, 9112 based on Foata normal form. 1/15957 useless extension candidates. Maximal degree in co-relation 32410. Up to 15753 conditions per place. [2024-06-21 16:32:13,039 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 44 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 16:32:13,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 231 flow [2024-06-21 16:32:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:32:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:32:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-21 16:32:13,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-21 16:32:13,050 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 95 transitions. [2024-06-21 16:32:13,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 231 flow [2024-06-21 16:32:13,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:13,057 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 16:32:13,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 16:32:13,062 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 16:32:13,062 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 16:32:13,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:13,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:13,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:13,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:32:13,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:13,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1577601866, now seen corresponding path program 1 times [2024-06-21 16:32:13,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:13,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481045686] [2024-06-21 16:32:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:13,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:13,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:13,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481045686] [2024-06-21 16:32:13,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481045686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:13,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:13,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:32:13,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197346859] [2024-06-21 16:32:13,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:13,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:32:13,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:32:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:32:13,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:32:13,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-06-21 16:32:13,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:13,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:32:13,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:15,018 INFO L124 PetriNetUnfolderBase]: 11629/16193 cut-off events. [2024-06-21 16:32:15,018 INFO L125 PetriNetUnfolderBase]: For 2878/2878 co-relation queries the response was YES. [2024-06-21 16:32:15,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36402 conditions, 16193 events. 11629/16193 cut-off events. For 2878/2878 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 89143 event pairs, 8311 based on Foata normal form. 4/16165 useless extension candidates. Maximal degree in co-relation 36390. Up to 15718 conditions per place. [2024-06-21 16:32:15,096 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 54 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 16:32:15,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 323 flow [2024-06-21 16:32:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:32:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:32:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-21 16:32:15,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-21 16:32:15,098 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-21 16:32:15,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 323 flow [2024-06-21 16:32:15,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:32:15,100 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 16:32:15,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 16:32:15,101 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 16:32:15,101 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 16:32:15,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-06-21 16:32:15,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:15,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:32:15,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:15,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1661016634, now seen corresponding path program 1 times [2024-06-21 16:32:15,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:15,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017423790] [2024-06-21 16:32:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:15,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:15,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:15,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017423790] [2024-06-21 16:32:15,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017423790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:15,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:15,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:32:15,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907877705] [2024-06-21 16:32:15,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:15,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:32:15,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:15,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:32:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:32:15,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:32:15,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:15,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:15,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:32:15,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:17,386 INFO L124 PetriNetUnfolderBase]: 11647/16273 cut-off events. [2024-06-21 16:32:17,387 INFO L125 PetriNetUnfolderBase]: For 8289/8289 co-relation queries the response was YES. [2024-06-21 16:32:17,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40506 conditions, 16273 events. 11647/16273 cut-off events. For 8289/8289 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 90052 event pairs, 6983 based on Foata normal form. 7/16277 useless extension candidates. Maximal degree in co-relation 40492. Up to 15639 conditions per place. [2024-06-21 16:32:17,462 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-21 16:32:17,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 539 flow [2024-06-21 16:32:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:32:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:32:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 16:32:17,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-21 16:32:17,464 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 161 transitions. [2024-06-21 16:32:17,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 539 flow [2024-06-21 16:32:17,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 520 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 16:32:17,468 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-21 16:32:17,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-21 16:32:17,469 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-21 16:32:17,469 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-21 16:32:17,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:17,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:17,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:17,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:32:17,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:17,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash 131209775, now seen corresponding path program 1 times [2024-06-21 16:32:17,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:17,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569963186] [2024-06-21 16:32:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:17,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569963186] [2024-06-21 16:32:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569963186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:18,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:32:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869972141] [2024-06-21 16:32:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:18,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:32:18,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:32:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:32:18,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:32:18,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:18,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:18,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:32:18,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:19,837 INFO L124 PetriNetUnfolderBase]: 11665/16299 cut-off events. [2024-06-21 16:32:19,837 INFO L125 PetriNetUnfolderBase]: For 19413/19418 co-relation queries the response was YES. [2024-06-21 16:32:19,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46749 conditions, 16299 events. 11665/16299 cut-off events. For 19413/19418 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 90074 event pairs, 6182 based on Foata normal form. 11/16307 useless extension candidates. Maximal degree in co-relation 46732. Up to 15625 conditions per place. [2024-06-21 16:32:19,904 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 82 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-21 16:32:19,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 115 transitions, 708 flow [2024-06-21 16:32:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:32:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:32:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-21 16:32:19,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-21 16:32:19,906 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 190 transitions. [2024-06-21 16:32:19,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 115 transitions, 708 flow [2024-06-21 16:32:19,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 696 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 16:32:19,914 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 404 flow [2024-06-21 16:32:19,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-21 16:32:19,916 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-21 16:32:19,916 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 404 flow [2024-06-21 16:32:19,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:19,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:19,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:19,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:32:19,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:19,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:19,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1490880453, now seen corresponding path program 1 times [2024-06-21 16:32:19,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:19,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502623374] [2024-06-21 16:32:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:19,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:21,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:21,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502623374] [2024-06-21 16:32:21,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502623374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:21,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:21,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:32:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14120530] [2024-06-21 16:32:21,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:32:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:32:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:32:21,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:32:21,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:21,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:21,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:32:21,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:22,897 INFO L124 PetriNetUnfolderBase]: 11694/16338 cut-off events. [2024-06-21 16:32:22,898 INFO L125 PetriNetUnfolderBase]: For 30752/30757 co-relation queries the response was YES. [2024-06-21 16:32:22,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51654 conditions, 16338 events. 11694/16338 cut-off events. For 30752/30757 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 90311 event pairs, 5263 based on Foata normal form. 18/16353 useless extension candidates. Maximal degree in co-relation 51634. Up to 15590 conditions per place. [2024-06-21 16:32:23,024 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 89 selfloop transitions, 30 changer transitions 0/126 dead transitions. [2024-06-21 16:32:23,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 126 transitions, 852 flow [2024-06-21 16:32:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-21 16:32:23,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906593406593407 [2024-06-21 16:32:23,026 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 404 flow. Second operand 7 states and 215 transitions. [2024-06-21 16:32:23,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 126 transitions, 852 flow [2024-06-21 16:32:23,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 786 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:23,037 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 443 flow [2024-06-21 16:32:23,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-21 16:32:23,038 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 16:32:23,038 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 443 flow [2024-06-21 16:32:23,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:23,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:23,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:23,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:32:23,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:23,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1084653298, now seen corresponding path program 1 times [2024-06-21 16:32:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:23,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031801612] [2024-06-21 16:32:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:23,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031801612] [2024-06-21 16:32:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031801612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:23,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:32:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96562963] [2024-06-21 16:32:23,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:32:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:23,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:32:23,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:32:23,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:23,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 443 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:23,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:23,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:23,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:25,048 INFO L124 PetriNetUnfolderBase]: 11685/16302 cut-off events. [2024-06-21 16:32:25,048 INFO L125 PetriNetUnfolderBase]: For 43409/43409 co-relation queries the response was YES. [2024-06-21 16:32:25,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55426 conditions, 16302 events. 11685/16302 cut-off events. For 43409/43409 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 89806 event pairs, 6112 based on Foata normal form. 3/16303 useless extension candidates. Maximal degree in co-relation 55404. Up to 15805 conditions per place. [2024-06-21 16:32:25,153 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 73 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2024-06-21 16:32:25,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 653 flow [2024-06-21 16:32:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:32:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:32:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 16:32:25,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-06-21 16:32:25,154 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 443 flow. Second operand 5 states and 123 transitions. [2024-06-21 16:32:25,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 653 flow [2024-06-21 16:32:25,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 566 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:25,166 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 387 flow [2024-06-21 16:32:25,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-21 16:32:25,166 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 16:32:25,166 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 387 flow [2024-06-21 16:32:25,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:25,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:25,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:25,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:32:25,167 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:25,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -765035948, now seen corresponding path program 1 times [2024-06-21 16:32:25,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:25,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113339400] [2024-06-21 16:32:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:25,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:25,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113339400] [2024-06-21 16:32:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113339400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:25,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:25,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:32:25,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744014808] [2024-06-21 16:32:25,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:25,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:32:25,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:25,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:32:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:32:25,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:25,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:25,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:25,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:25,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:27,544 INFO L124 PetriNetUnfolderBase]: 11751/16628 cut-off events. [2024-06-21 16:32:27,544 INFO L125 PetriNetUnfolderBase]: For 50290/50290 co-relation queries the response was YES. [2024-06-21 16:32:27,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56695 conditions, 16628 events. 11751/16628 cut-off events. For 50290/50290 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 93171 event pairs, 5767 based on Foata normal form. 14/16639 useless extension candidates. Maximal degree in co-relation 56671. Up to 15681 conditions per place. [2024-06-21 16:32:27,630 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 91 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-21 16:32:27,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 119 transitions, 837 flow [2024-06-21 16:32:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:32:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:32:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:32:27,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-21 16:32:27,632 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 387 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:32:27,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 119 transitions, 837 flow [2024-06-21 16:32:27,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 808 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:27,645 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 544 flow [2024-06-21 16:32:27,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-21 16:32:27,647 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-21 16:32:27,647 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 544 flow [2024-06-21 16:32:27,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:27,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:27,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:27,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:32:27,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:27,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:27,648 INFO L85 PathProgramCache]: Analyzing trace with hash -203748305, now seen corresponding path program 1 times [2024-06-21 16:32:27,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:27,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936311406] [2024-06-21 16:32:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:27,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:28,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936311406] [2024-06-21 16:32:28,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936311406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:28,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:28,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:32:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705818074] [2024-06-21 16:32:28,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:28,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:32:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:32:28,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:32:28,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:28,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 544 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:28,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:28,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:28,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:29,829 INFO L124 PetriNetUnfolderBase]: 11764/16658 cut-off events. [2024-06-21 16:32:29,829 INFO L125 PetriNetUnfolderBase]: For 70591/70601 co-relation queries the response was YES. [2024-06-21 16:32:29,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63021 conditions, 16658 events. 11764/16658 cut-off events. For 70591/70601 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 93624 event pairs, 5928 based on Foata normal form. 14/16669 useless extension candidates. Maximal degree in co-relation 62995. Up to 15795 conditions per place. [2024-06-21 16:32:29,941 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 89 selfloop transitions, 25 changer transitions 0/120 dead transitions. [2024-06-21 16:32:29,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 921 flow [2024-06-21 16:32:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:32:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:32:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 16:32:29,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:32:29,942 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 544 flow. Second operand 6 states and 156 transitions. [2024-06-21 16:32:29,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 921 flow [2024-06-21 16:32:29,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 893 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-21 16:32:29,979 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 612 flow [2024-06-21 16:32:29,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=612, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2024-06-21 16:32:29,980 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 16:32:29,980 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 612 flow [2024-06-21 16:32:29,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:29,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:29,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:29,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:32:29,980 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:29,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1325211631, now seen corresponding path program 2 times [2024-06-21 16:32:29,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:29,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361920771] [2024-06-21 16:32:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:29,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:30,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:30,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361920771] [2024-06-21 16:32:30,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361920771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:30,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:30,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:32:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723137831] [2024-06-21 16:32:30,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:30,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:32:30,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:30,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:32:30,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:32:30,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:30,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 612 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:30,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:30,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:30,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:32,094 INFO L124 PetriNetUnfolderBase]: 11734/16611 cut-off events. [2024-06-21 16:32:32,095 INFO L125 PetriNetUnfolderBase]: For 77749/77749 co-relation queries the response was YES. [2024-06-21 16:32:32,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63520 conditions, 16611 events. 11734/16611 cut-off events. For 77749/77749 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 93337 event pairs, 5921 based on Foata normal form. 3/16612 useless extension candidates. Maximal degree in co-relation 63491. Up to 15851 conditions per place. [2024-06-21 16:32:32,206 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 94 selfloop transitions, 14 changer transitions 0/114 dead transitions. [2024-06-21 16:32:32,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 890 flow [2024-06-21 16:32:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:32:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:32:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 16:32:32,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 16:32:32,208 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 612 flow. Second operand 6 states and 146 transitions. [2024-06-21 16:32:32,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 890 flow [2024-06-21 16:32:32,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 847 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:32,249 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 608 flow [2024-06-21 16:32:32,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=608, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-21 16:32:32,250 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-21 16:32:32,250 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 608 flow [2024-06-21 16:32:32,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:32,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:32,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:32,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:32:32,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:32,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash -937485163, now seen corresponding path program 1 times [2024-06-21 16:32:32,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:32,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546262294] [2024-06-21 16:32:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:32,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:33,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546262294] [2024-06-21 16:32:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546262294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:33,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:33,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449830190] [2024-06-21 16:32:33,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:33,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:33,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:33,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:33,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:33,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:33,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:33,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:34,680 INFO L124 PetriNetUnfolderBase]: 12558/17647 cut-off events. [2024-06-21 16:32:34,680 INFO L125 PetriNetUnfolderBase]: For 94571/94571 co-relation queries the response was YES. [2024-06-21 16:32:34,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69095 conditions, 17647 events. 12558/17647 cut-off events. For 94571/94571 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 98279 event pairs, 5132 based on Foata normal form. 28/17668 useless extension candidates. Maximal degree in co-relation 69065. Up to 15868 conditions per place. [2024-06-21 16:32:34,810 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 121 selfloop transitions, 41 changer transitions 0/168 dead transitions. [2024-06-21 16:32:34,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 168 transitions, 1426 flow [2024-06-21 16:32:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 16:32:34,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2024-06-21 16:32:34,811 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 608 flow. Second operand 7 states and 197 transitions. [2024-06-21 16:32:34,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 168 transitions, 1426 flow [2024-06-21 16:32:34,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 168 transitions, 1366 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:34,873 INFO L231 Difference]: Finished difference. Result has 86 places, 115 transitions, 914 flow [2024-06-21 16:32:34,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=914, PETRI_PLACES=86, PETRI_TRANSITIONS=115} [2024-06-21 16:32:34,875 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 16:32:34,875 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 115 transitions, 914 flow [2024-06-21 16:32:34,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:34,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:34,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:34,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:32:34,876 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:34,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1100507837, now seen corresponding path program 2 times [2024-06-21 16:32:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:34,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803491986] [2024-06-21 16:32:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:35,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:35,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803491986] [2024-06-21 16:32:35,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803491986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:35,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:35,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:35,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750264036] [2024-06-21 16:32:35,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:35,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:35,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:35,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:35,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:35,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 115 transitions, 914 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:35,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:35,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:35,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:37,562 INFO L124 PetriNetUnfolderBase]: 12686/17857 cut-off events. [2024-06-21 16:32:37,562 INFO L125 PetriNetUnfolderBase]: For 130145/130155 co-relation queries the response was YES. [2024-06-21 16:32:37,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80604 conditions, 17857 events. 12686/17857 cut-off events. For 130145/130155 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 99775 event pairs, 5520 based on Foata normal form. 14/17863 useless extension candidates. Maximal degree in co-relation 80570. Up to 16979 conditions per place. [2024-06-21 16:32:37,702 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-21 16:32:37,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 163 transitions, 1510 flow [2024-06-21 16:32:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:32:37,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-21 16:32:37,703 INFO L175 Difference]: Start difference. First operand has 86 places, 115 transitions, 914 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:32:37,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 163 transitions, 1510 flow [2024-06-21 16:32:37,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 163 transitions, 1452 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-21 16:32:37,790 INFO L231 Difference]: Finished difference. Result has 95 places, 126 transitions, 1070 flow [2024-06-21 16:32:37,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1070, PETRI_PLACES=95, PETRI_TRANSITIONS=126} [2024-06-21 16:32:37,791 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2024-06-21 16:32:37,791 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 126 transitions, 1070 flow [2024-06-21 16:32:37,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:37,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:37,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:37,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:32:37,792 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:37,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1130007437, now seen corresponding path program 3 times [2024-06-21 16:32:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:37,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404640900] [2024-06-21 16:32:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:37,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:38,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:38,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404640900] [2024-06-21 16:32:38,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404640900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:38,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:38,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:38,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618352444] [2024-06-21 16:32:38,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:38,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:38,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:38,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:38,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:38,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:38,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 126 transitions, 1070 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:38,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:38,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:38,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:40,540 INFO L124 PetriNetUnfolderBase]: 12752/17950 cut-off events. [2024-06-21 16:32:40,541 INFO L125 PetriNetUnfolderBase]: For 150436/150436 co-relation queries the response was YES. [2024-06-21 16:32:40,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83558 conditions, 17950 events. 12752/17950 cut-off events. For 150436/150436 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 100384 event pairs, 5508 based on Foata normal form. 14/17961 useless extension candidates. Maximal degree in co-relation 83518. Up to 16854 conditions per place. [2024-06-21 16:32:40,669 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 135 selfloop transitions, 36 changer transitions 0/177 dead transitions. [2024-06-21 16:32:40,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 177 transitions, 1768 flow [2024-06-21 16:32:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 16:32:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082417582417582 [2024-06-21 16:32:40,671 INFO L175 Difference]: Start difference. First operand has 95 places, 126 transitions, 1070 flow. Second operand 7 states and 185 transitions. [2024-06-21 16:32:40,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 177 transitions, 1768 flow [2024-06-21 16:32:40,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 177 transitions, 1698 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:40,764 INFO L231 Difference]: Finished difference. Result has 100 places, 136 transitions, 1229 flow [2024-06-21 16:32:40,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1229, PETRI_PLACES=100, PETRI_TRANSITIONS=136} [2024-06-21 16:32:40,764 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-21 16:32:40,764 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 136 transitions, 1229 flow [2024-06-21 16:32:40,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:40,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:40,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:32:40,765 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:40,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash 954073619, now seen corresponding path program 1 times [2024-06-21 16:32:40,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:40,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764370667] [2024-06-21 16:32:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:40,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:41,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:41,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764370667] [2024-06-21 16:32:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764370667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15870639] [2024-06-21 16:32:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:41,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:41,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:41,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:41,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:41,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 136 transitions, 1229 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:41,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:41,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:41,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:44,187 INFO L124 PetriNetUnfolderBase]: 12933/18202 cut-off events. [2024-06-21 16:32:44,187 INFO L125 PetriNetUnfolderBase]: For 179276/179276 co-relation queries the response was YES. [2024-06-21 16:32:44,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88120 conditions, 18202 events. 12933/18202 cut-off events. For 179276/179276 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 101982 event pairs, 5404 based on Foata normal form. 30/18229 useless extension candidates. Maximal degree in co-relation 88078. Up to 17043 conditions per place. [2024-06-21 16:32:44,343 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 144 selfloop transitions, 34 changer transitions 0/184 dead transitions. [2024-06-21 16:32:44,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 184 transitions, 1851 flow [2024-06-21 16:32:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 16:32:44,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-21 16:32:44,345 INFO L175 Difference]: Start difference. First operand has 100 places, 136 transitions, 1229 flow. Second operand 7 states and 187 transitions. [2024-06-21 16:32:44,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 184 transitions, 1851 flow [2024-06-21 16:32:44,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 1781 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:44,476 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1286 flow [2024-06-21 16:32:44,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1286, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-21 16:32:44,477 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-21 16:32:44,477 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1286 flow [2024-06-21 16:32:44,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:44,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:44,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:44,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:32:44,478 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:44,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1137705497, now seen corresponding path program 1 times [2024-06-21 16:32:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:44,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045866024] [2024-06-21 16:32:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:44,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:44,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:44,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045866024] [2024-06-21 16:32:44,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045866024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:44,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:44,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:32:44,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673595034] [2024-06-21 16:32:44,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:44,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:32:44,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:44,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:32:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:32:45,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:45,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1286 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:45,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:45,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:45,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:46,882 INFO L124 PetriNetUnfolderBase]: 12919/18190 cut-off events. [2024-06-21 16:32:46,882 INFO L125 PetriNetUnfolderBase]: For 199315/199315 co-relation queries the response was YES. [2024-06-21 16:32:46,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91032 conditions, 18190 events. 12919/18190 cut-off events. For 199315/199315 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 101802 event pairs, 5549 based on Foata normal form. 4/18192 useless extension candidates. Maximal degree in co-relation 90988. Up to 17452 conditions per place. [2024-06-21 16:32:47,061 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 134 selfloop transitions, 13 changer transitions 0/153 dead transitions. [2024-06-21 16:32:47,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 153 transitions, 1616 flow [2024-06-21 16:32:47,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:32:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:32:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 16:32:47,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 16:32:47,062 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1286 flow. Second operand 5 states and 120 transitions. [2024-06-21 16:32:47,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 153 transitions, 1616 flow [2024-06-21 16:32:47,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1495 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:47,222 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1203 flow [2024-06-21 16:32:47,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1203, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-21 16:32:47,222 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-21 16:32:47,223 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1203 flow [2024-06-21 16:32:47,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:47,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:47,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:47,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:32:47,223 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:47,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1002578160, now seen corresponding path program 1 times [2024-06-21 16:32:47,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:47,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069798981] [2024-06-21 16:32:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:47,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:48,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:48,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069798981] [2024-06-21 16:32:48,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069798981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:48,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:48,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:48,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354300523] [2024-06-21 16:32:48,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:48,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:48,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:48,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:48,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1203 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:48,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:48,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:48,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:50,177 INFO L124 PetriNetUnfolderBase]: 12941/18212 cut-off events. [2024-06-21 16:32:50,178 INFO L125 PetriNetUnfolderBase]: For 214550/214563 co-relation queries the response was YES. [2024-06-21 16:32:50,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91730 conditions, 18212 events. 12941/18212 cut-off events. For 214550/214563 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 101810 event pairs, 5435 based on Foata normal form. 13/18222 useless extension candidates. Maximal degree in co-relation 91685. Up to 17306 conditions per place. [2024-06-21 16:32:50,357 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 146 selfloop transitions, 35 changer transitions 0/187 dead transitions. [2024-06-21 16:32:50,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1865 flow [2024-06-21 16:32:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:32:50,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:32:50,359 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1203 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:32:50,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1865 flow [2024-06-21 16:32:50,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1816 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:50,508 INFO L231 Difference]: Finished difference. Result has 107 places, 147 transitions, 1359 flow [2024-06-21 16:32:50,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1359, PETRI_PLACES=107, PETRI_TRANSITIONS=147} [2024-06-21 16:32:50,509 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 16:32:50,509 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 147 transitions, 1359 flow [2024-06-21 16:32:50,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:50,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:50,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:50,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:32:50,510 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)] === [2024-06-21 16:32:50,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:50,510 INFO L85 PathProgramCache]: Analyzing trace with hash 999006960, now seen corresponding path program 2 times [2024-06-21 16:32:50,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:50,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515070060] [2024-06-21 16:32:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:50,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:51,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:51,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515070060] [2024-06-21 16:32:51,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515070060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:51,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:51,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544666625] [2024-06-21 16:32:51,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:51,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:51,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:51,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 147 transitions, 1359 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:51,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:51,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:51,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:53,483 INFO L124 PetriNetUnfolderBase]: 12932/18200 cut-off events. [2024-06-21 16:32:53,484 INFO L125 PetriNetUnfolderBase]: For 245779/245792 co-relation queries the response was YES. [2024-06-21 16:32:53,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95514 conditions, 18200 events. 12932/18200 cut-off events. For 245779/245792 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 101906 event pairs, 5435 based on Foata normal form. 13/18210 useless extension candidates. Maximal degree in co-relation 95469. Up to 17348 conditions per place. [2024-06-21 16:32:53,646 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 146 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-21 16:32:53,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 1797 flow [2024-06-21 16:32:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:32:53,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 16:32:53,648 INFO L175 Difference]: Start difference. First operand has 107 places, 147 transitions, 1359 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:32:53,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 1797 flow [2024-06-21 16:32:53,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1680 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:53,867 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1311 flow [2024-06-21 16:32:53,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1311, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-21 16:32:53,867 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-21 16:32:53,867 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1311 flow [2024-06-21 16:32:53,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:53,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:53,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:53,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:32:53,868 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:53,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1002731765, now seen corresponding path program 1 times [2024-06-21 16:32:53,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:53,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190126311] [2024-06-21 16:32:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:53,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:54,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190126311] [2024-06-21 16:32:54,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190126311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:54,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:54,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:54,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232554087] [2024-06-21 16:32:54,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:54,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:54,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:54,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:54,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:54,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1311 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:54,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:54,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:54,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:56,727 INFO L124 PetriNetUnfolderBase]: 13214/18535 cut-off events. [2024-06-21 16:32:56,727 INFO L125 PetriNetUnfolderBase]: For 269688/269693 co-relation queries the response was YES. [2024-06-21 16:32:56,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98974 conditions, 18535 events. 13214/18535 cut-off events. For 269688/269693 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 103244 event pairs, 4997 based on Foata normal form. 18/18546 useless extension candidates. Maximal degree in co-relation 98927. Up to 16423 conditions per place. [2024-06-21 16:32:56,895 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 138 selfloop transitions, 64 changer transitions 0/208 dead transitions. [2024-06-21 16:32:56,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 208 transitions, 2285 flow [2024-06-21 16:32:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 16:32:56,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 16:32:56,909 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1311 flow. Second operand 7 states and 196 transitions. [2024-06-21 16:32:56,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 208 transitions, 2285 flow [2024-06-21 16:32:57,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 208 transitions, 2213 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:57,064 INFO L231 Difference]: Finished difference. Result has 114 places, 158 transitions, 1595 flow [2024-06-21 16:32:57,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1595, PETRI_PLACES=114, PETRI_TRANSITIONS=158} [2024-06-21 16:32:57,065 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-21 16:32:57,065 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 158 transitions, 1595 flow [2024-06-21 16:32:57,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:57,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:57,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:57,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:32:57,065 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:57,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1766398569, now seen corresponding path program 2 times [2024-06-21 16:32:57,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:57,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634395002] [2024-06-21 16:32:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:57,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:57,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:57,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634395002] [2024-06-21 16:32:57,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634395002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:57,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934619510] [2024-06-21 16:32:57,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:57,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:57,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:57,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:57,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:32:57,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 158 transitions, 1595 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:57,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:57,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:32:57,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:00,131 INFO L124 PetriNetUnfolderBase]: 13188/18497 cut-off events. [2024-06-21 16:33:00,131 INFO L125 PetriNetUnfolderBase]: For 310960/310965 co-relation queries the response was YES. [2024-06-21 16:33:00,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103939 conditions, 18497 events. 13188/18497 cut-off events. For 310960/310965 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 103132 event pairs, 5062 based on Foata normal form. 18/18508 useless extension candidates. Maximal degree in co-relation 103889. Up to 16412 conditions per place. [2024-06-21 16:33:00,288 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 139 selfloop transitions, 68 changer transitions 0/213 dead transitions. [2024-06-21 16:33:00,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 213 transitions, 2471 flow [2024-06-21 16:33:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:33:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:33:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 16:33:00,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467032967032966 [2024-06-21 16:33:00,290 INFO L175 Difference]: Start difference. First operand has 114 places, 158 transitions, 1595 flow. Second operand 7 states and 199 transitions. [2024-06-21 16:33:00,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 213 transitions, 2471 flow [2024-06-21 16:33:00,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 213 transitions, 2319 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:00,629 INFO L231 Difference]: Finished difference. Result has 120 places, 162 transitions, 1723 flow [2024-06-21 16:33:00,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1723, PETRI_PLACES=120, PETRI_TRANSITIONS=162} [2024-06-21 16:33:00,630 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-21 16:33:00,630 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 162 transitions, 1723 flow [2024-06-21 16:33:00,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:00,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:00,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:00,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:33:00,631 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:00,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2084298466, now seen corresponding path program 1 times [2024-06-21 16:33:00,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:00,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826424898] [2024-06-21 16:33:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:01,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:01,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826424898] [2024-06-21 16:33:01,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826424898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:01,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:01,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:01,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808722618] [2024-06-21 16:33:01,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:01,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:01,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:01,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:01,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:01,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:33:01,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 162 transitions, 1723 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:01,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:01,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:33:01,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:04,418 INFO L124 PetriNetUnfolderBase]: 13221/18568 cut-off events. [2024-06-21 16:33:04,419 INFO L125 PetriNetUnfolderBase]: For 336431/336431 co-relation queries the response was YES. [2024-06-21 16:33:04,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106388 conditions, 18568 events. 13221/18568 cut-off events. For 336431/336431 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 103770 event pairs, 5441 based on Foata normal form. 7/18572 useless extension candidates. Maximal degree in co-relation 106335. Up to 17637 conditions per place. [2024-06-21 16:33:04,585 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 165 selfloop transitions, 39 changer transitions 0/210 dead transitions. [2024-06-21 16:33:04,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 210 transitions, 2433 flow [2024-06-21 16:33:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:33:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:33:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:33:04,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-21 16:33:04,595 INFO L175 Difference]: Start difference. First operand has 120 places, 162 transitions, 1723 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:33:04,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 210 transitions, 2433 flow [2024-06-21 16:33:04,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 210 transitions, 2305 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:04,828 INFO L231 Difference]: Finished difference. Result has 124 places, 175 transitions, 1881 flow [2024-06-21 16:33:04,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1881, PETRI_PLACES=124, PETRI_TRANSITIONS=175} [2024-06-21 16:33:04,829 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-21 16:33:04,829 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 175 transitions, 1881 flow [2024-06-21 16:33:04,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:04,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:04,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:04,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:33:04,830 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:04,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2088774057, now seen corresponding path program 3 times [2024-06-21 16:33:04,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152386966] [2024-06-21 16:33:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:05,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152386966] [2024-06-21 16:33:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152386966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:05,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:05,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:33:05,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230450930] [2024-06-21 16:33:05,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:05,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:33:05,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:33:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:33:05,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:33:05,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 175 transitions, 1881 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:05,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:05,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:33:05,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:08,585 INFO L124 PetriNetUnfolderBase]: 13287/18653 cut-off events. [2024-06-21 16:33:08,586 INFO L125 PetriNetUnfolderBase]: For 372077/372090 co-relation queries the response was YES. [2024-06-21 16:33:08,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111833 conditions, 18653 events. 13287/18653 cut-off events. For 372077/372090 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 104359 event pairs, 5456 based on Foata normal form. 24/18671 useless extension candidates. Maximal degree in co-relation 111778. Up to 17696 conditions per place. [2024-06-21 16:33:08,747 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 181 selfloop transitions, 30 changer transitions 0/217 dead transitions. [2024-06-21 16:33:08,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 217 transitions, 2571 flow [2024-06-21 16:33:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:33:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:33:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:33:08,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-21 16:33:08,749 INFO L175 Difference]: Start difference. First operand has 124 places, 175 transitions, 1881 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:33:08,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 217 transitions, 2571 flow [2024-06-21 16:33:09,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 217 transitions, 2481 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:09,025 INFO L231 Difference]: Finished difference. Result has 128 places, 180 transitions, 1957 flow [2024-06-21 16:33:09,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1957, PETRI_PLACES=128, PETRI_TRANSITIONS=180} [2024-06-21 16:33:09,026 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-21 16:33:09,026 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 180 transitions, 1957 flow [2024-06-21 16:33:09,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:09,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:09,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:09,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:33:09,027 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:09,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash 901588536, now seen corresponding path program 1 times [2024-06-21 16:33:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:09,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593953180] [2024-06-21 16:33:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:10,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:10,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593953180] [2024-06-21 16:33:10,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593953180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:10,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:10,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:10,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105407695] [2024-06-21 16:33:10,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:10,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:10,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:10,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:33:10,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 180 transitions, 1957 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:10,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:10,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:33:10,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:12,872 INFO L124 PetriNetUnfolderBase]: 13323/18696 cut-off events. [2024-06-21 16:33:12,873 INFO L125 PetriNetUnfolderBase]: For 406311/406324 co-relation queries the response was YES. [2024-06-21 16:33:13,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114254 conditions, 18696 events. 13323/18696 cut-off events. For 406311/406324 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 104407 event pairs, 4574 based on Foata normal form. 16/18709 useless extension candidates. Maximal degree in co-relation 114198. Up to 17668 conditions per place. [2024-06-21 16:33:13,144 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 185 selfloop transitions, 44 changer transitions 0/235 dead transitions. [2024-06-21 16:33:13,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 235 transitions, 2797 flow [2024-06-21 16:33:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:33:13,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-21 16:33:13,146 INFO L175 Difference]: Start difference. First operand has 128 places, 180 transitions, 1957 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:33:13,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 235 transitions, 2797 flow [2024-06-21 16:33:13,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 235 transitions, 2697 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:13,445 INFO L231 Difference]: Finished difference. Result has 131 places, 186 transitions, 2101 flow [2024-06-21 16:33:13,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2101, PETRI_PLACES=131, PETRI_TRANSITIONS=186} [2024-06-21 16:33:13,446 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-21 16:33:13,446 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 186 transitions, 2101 flow [2024-06-21 16:33:13,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:13,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:13,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:13,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:33:13,446 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:13,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1194310886, now seen corresponding path program 2 times [2024-06-21 16:33:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:13,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426055854] [2024-06-21 16:33:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:14,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426055854] [2024-06-21 16:33:14,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426055854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:14,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:14,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952928830] [2024-06-21 16:33:14,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:14,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:14,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:33:14,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 186 transitions, 2101 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:14,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:14,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:33:14,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:17,503 INFO L124 PetriNetUnfolderBase]: 13308/18675 cut-off events. [2024-06-21 16:33:17,503 INFO L125 PetriNetUnfolderBase]: For 444238/444251 co-relation queries the response was YES. [2024-06-21 16:33:17,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116699 conditions, 18675 events. 13308/18675 cut-off events. For 444238/444251 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 104274 event pairs, 5241 based on Foata normal form. 16/18688 useless extension candidates. Maximal degree in co-relation 116642. Up to 17766 conditions per place. [2024-06-21 16:33:17,661 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 191 selfloop transitions, 41 changer transitions 0/238 dead transitions. [2024-06-21 16:33:17,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 238 transitions, 2699 flow [2024-06-21 16:33:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-21 16:33:17,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829059829059829 [2024-06-21 16:33:17,664 INFO L175 Difference]: Start difference. First operand has 131 places, 186 transitions, 2101 flow. Second operand 9 states and 226 transitions. [2024-06-21 16:33:17,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 238 transitions, 2699 flow [2024-06-21 16:33:18,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 238 transitions, 2538 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-21 16:33:18,051 INFO L231 Difference]: Finished difference. Result has 136 places, 186 transitions, 2033 flow [2024-06-21 16:33:18,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2033, PETRI_PLACES=136, PETRI_TRANSITIONS=186} [2024-06-21 16:33:18,051 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-21 16:33:18,052 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 186 transitions, 2033 flow [2024-06-21 16:33:18,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:18,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:18,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:18,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:33:18,052 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:18,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1194310762, now seen corresponding path program 1 times [2024-06-21 16:33:18,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:18,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539967866] [2024-06-21 16:33:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:19,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:19,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539967866] [2024-06-21 16:33:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539967866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:19,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:19,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233245108] [2024-06-21 16:33:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:19,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:19,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:19,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:19,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:19,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:33:19,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 186 transitions, 2033 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:19,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:19,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:33:19,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:22,049 INFO L124 PetriNetUnfolderBase]: 13574/18922 cut-off events. [2024-06-21 16:33:22,049 INFO L125 PetriNetUnfolderBase]: For 479810/479819 co-relation queries the response was YES. [2024-06-21 16:33:22,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119744 conditions, 18922 events. 13574/18922 cut-off events. For 479810/479819 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 105790 event pairs, 4548 based on Foata normal form. 20/18935 useless extension candidates. Maximal degree in co-relation 119685. Up to 15723 conditions per place. [2024-06-21 16:33:22,224 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 168 selfloop transitions, 100 changer transitions 0/274 dead transitions. [2024-06-21 16:33:22,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 274 transitions, 3579 flow [2024-06-21 16:33:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-21 16:33:22,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552884615384616 [2024-06-21 16:33:22,226 INFO L175 Difference]: Start difference. First operand has 136 places, 186 transitions, 2033 flow. Second operand 8 states and 231 transitions. [2024-06-21 16:33:22,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 274 transitions, 3579 flow [2024-06-21 16:33:22,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 274 transitions, 3486 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:22,622 INFO L231 Difference]: Finished difference. Result has 139 places, 205 transitions, 2509 flow [2024-06-21 16:33:22,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2509, PETRI_PLACES=139, PETRI_TRANSITIONS=205} [2024-06-21 16:33:22,623 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-21 16:33:22,623 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 205 transitions, 2509 flow [2024-06-21 16:33:22,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:22,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:22,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:22,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:33:22,624 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:22,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1015272790, now seen corresponding path program 2 times [2024-06-21 16:33:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:22,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90134353] [2024-06-21 16:33:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:22,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:23,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90134353] [2024-06-21 16:33:23,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90134353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:23,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:23,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:23,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254591940] [2024-06-21 16:33:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:23,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:23,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:33:23,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 205 transitions, 2509 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:23,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:23,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:33:23,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:26,872 INFO L124 PetriNetUnfolderBase]: 13702/19044 cut-off events. [2024-06-21 16:33:26,872 INFO L125 PetriNetUnfolderBase]: For 548545/548550 co-relation queries the response was YES. [2024-06-21 16:33:26,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129853 conditions, 19044 events. 13702/19044 cut-off events. For 548545/548550 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 106102 event pairs, 4699 based on Foata normal form. 18/19055 useless extension candidates. Maximal degree in co-relation 129790. Up to 16958 conditions per place. [2024-06-21 16:33:27,042 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 186 selfloop transitions, 73 changer transitions 0/265 dead transitions. [2024-06-21 16:33:27,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 265 transitions, 3563 flow [2024-06-21 16:33:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 16:33:27,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336538461538461 [2024-06-21 16:33:27,043 INFO L175 Difference]: Start difference. First operand has 139 places, 205 transitions, 2509 flow. Second operand 8 states and 222 transitions. [2024-06-21 16:33:27,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 265 transitions, 3563 flow [2024-06-21 16:33:27,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 265 transitions, 3407 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-21 16:33:27,516 INFO L231 Difference]: Finished difference. Result has 145 places, 210 transitions, 2615 flow [2024-06-21 16:33:27,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2615, PETRI_PLACES=145, PETRI_TRANSITIONS=210} [2024-06-21 16:33:27,516 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-21 16:33:27,517 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 210 transitions, 2615 flow [2024-06-21 16:33:27,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:27,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:27,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:27,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:33:27,517 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:27,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1191514252, now seen corresponding path program 3 times [2024-06-21 16:33:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:27,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863647195] [2024-06-21 16:33:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:28,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:28,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863647195] [2024-06-21 16:33:28,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863647195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:28,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:28,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:28,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4568288] [2024-06-21 16:33:28,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:28,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:28,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:28,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:28,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:28,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 16:33:28,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 210 transitions, 2615 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:28,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:28,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 16:33:28,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand